Terminal protection cover and traction transformer

Abstract

The utility model provides a terminal protection cover and a traction transformer. The terminal protection cover comprises an n-shaped wall plate enclosed in the Y direction, a first flange plate connected to one end of the wall plate in the X direction, a second flange plate connected to the other end of the wall plate in the X direction, and a lower side plate connected to the bottom of the n-shaped wall plate, and the lower side plate is provided with at least two mounting surfaces. The mounting surface is provided with a plurality of cable glands for allowing terminal cables to pass through, and the X direction and the Y direction are perpendicular to each other on the same overlook projection plane. According to the utility model, the terminal protection cover is designed to have two mounting surfaces and is provided with the cable gland, thereby not only increasing the wire outlet space, but also realizing threading sealing through the cable gland without gluing sealing, and furthermore, when an external cable is provided with a shielding layer, the shielding layer can realize grounding through the cable gland without arranging a grounding wire and a grounding sheet, so that the cost is reduced. The design structure is simpler, and installation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rail vehicle technical field especially relates to a terminal protection cover and traction transformer. BACKGROUND

[0002] The traction transformer of rail transit vehicle is generally located at the roof, inside or bottom of train. The traction transformer of motor train unit is mostly installed at the bottom of train, which reduces the 25kV voltage of catenary to appropriate voltage to supply power to the traction system or auxiliary system on train. The low-voltage outlet terminal of traction transformer mostly uses porcelain sleeve terminal. Due to the harsh environment under the train, in order to prevent the porcelain sleeve terminal from being damaged or flashover due to the influence of gravel, rain, snow and sand under the train, a low-voltage terminal protection cover is designed outside the low-voltage outlet terminal to prevent the porcelain sleeve terminal from being damaged by the external environment.

[0003] The existing low-voltage terminal protection cover technical scheme is shown in Figure 1 、 Figure 2 The terminal protection cover 11 is connected to the transformer oil tank 1 by fastening bolt, the terminal protection cover 11 has a porcelain sleeve terminal 2 inside, the porcelain sleeve terminal 2 is connected to the internal circuit of the transformer through one end of the side wall of the transformer oil tank 1, and the other end is connected to the external cable 3. The bottom of the terminal protection cover 11 is provided with only one mounting surface 61, and the mounting surface 61 is provided with a threading hole 23. The cable 3 is connected to other electrical equipment at the rear end through the threading hole 23 of the terminal protection cover 11, and the threading hole 23 is sealed by glue. When the number of train body cable 3 is small, such as one terminal connecting one cable, the terminal protection cover 11 has enough space to meet the cable threading requirement. When the number of cables is large, only one mounting surface 61 does not have enough outlet space and glue space, and the installation is extremely inconvenient. Moreover, when the cable 3 is provided with a shielding layer outside, a grounding sheet 21 needs to be arranged inside the terminal protection cover 11, and the shielding layer is grounded through the grounding wire 22, which causes the internal wiring to be relatively complex. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a terminal protection cover and traction transformer, increasing the outlet space and facilitating the installation.

[0005] The technical scheme of the utility model is: a terminal protection cover, which comprises a wall plate enclosed in n type in Y direction, a first flange plate connected to one end of the wall plate in X direction, a second flange plate connected to the other end of the wall plate in X direction, and a lower side plate connected to the bottom of the n type wall plate, wherein the lower side plate is provided with at least two mounting surfaces, and the mounting surfaces are provided with a plurality of luer tips for terminal cable threading, and the X direction and the Y direction are perpendicular to each other in the same overhead projection plane.

[0006] In the above scheme, the terminal protection cover is designed with two mounting surfaces and a gland, which not only increases the cable outlet space, but also achieves cable sealing through the gland, eliminating the need for additional sealant. Furthermore, when the external cable has a shielding layer, the shielding layer can be grounded through the gland, eliminating the need to lay grounding wires and grounding plates. The design structure is simpler and the installation is more convenient.

[0007] Preferably, at least two of the mounting surfaces are not on the same plane.

[0008] Preferably, of the at least two mounting surfaces, the mounting surface closer to the first flange plate is a horizontal surface, and the mounting surface closer to the second flange plate is an upwardly inclined slope.

[0009] Preferably, the plurality of said glands are staggered.

[0010] Preferably, the terminal protective cover further includes a cover plate connected to the second flange plate.

[0011] Preferably, a handle is provided on the outer surface of the cover plate.

[0012] Preferably, the wall panel includes a first plate extending in the Y direction and a second plate perpendicularly connected to both ends of the first plate in the Y direction, the first flange plate and the second flange plate are respectively connected between the first plate and the two second plates, the lower side plate is connected between the two second plates, and the first plate and the lower side plate are arranged opposite each other vertically.

[0013] Preferably, the inner surface of the second flange plate facing the gland is provided with a sliding groove plate, the sliding groove plate extending along the Y direction, or multiple sliding groove plates are spaced apart in the Y direction.

[0014] This utility model also provides a traction transformer, including a transmission oil tank and the aforementioned terminal protection cover. The side wall of the transmission oil tank is provided with a plurality of porcelain bushing terminals, and each porcelain bushing terminal is provided with at least one cable. The first flange plate on the terminal protection cover is connected to the transmission oil tank, and the cables pass through the gland one by one to the outside of the transmission oil tank.

[0015] Preferably, a sealing gasket is provided between the first flange plate and the transmission oil tank.

[0016] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0017] I. This utility model designs the terminal protection cover with two mounting surfaces and provides glands, which not only increases the cable outlet space, but also achieves cable sealing through the glands, eliminating the need for additional sealant. Furthermore, when the external cable has a shielding layer, the shielding layer can be grounded through the glands, eliminating the need for additional grounding wires and grounding plates. The design structure is simpler and the installation is more convenient.

[0018] Second, the two mounting surfaces have a horizontal surface and an inclined surface, so that the cable outlet direction is not limited to downwards. It can also be selected to outlet upwards or other directions according to the actual situation, making cable routing more convenient.

[0019] Third, the multiple glands on the mounting surface are staggered, so that each gland has corresponding fastening space, which facilitates cable exit and meets the cable exit space requirements.

[0020] Fourth, the second flange plate is equipped with a sliding plate, which can install wire clamps as needed and can fix the cable passing through the gland head for a second time to reduce the impact of cyclic force on the cable connection when the vehicle moves. Attached Figure Description

[0021] Figure 1 A schematic diagram of an existing terminal protection cover installed on a transmission oil tank;

[0022] Figure 2 For along Figure 1 A schematic diagram of the projection along direction A;

[0023] Figure 3 A schematic diagram of the structure of the terminal protective cover provided by this utility model;

[0024] Figure 4 A partial structural schematic diagram of the traction transformer provided by this utility model;

[0025] Figure 5 For along Figure 4 A schematic diagram of the B-direction projection.

[0026] In the attached diagram: 1. Transmission oil tank; 2. Porcelain bushing terminal; 21. Grounding plate; 22. Grounding wire; 23. Wire hole; 3. Cable; 4. First flange plate; 5. Wall panel; 51. First plate; 52. Second plate; 6. Lower side plate; 61. Mounting surface; 7. Second flange plate; 8. Cover plate; 81. Handle; 9. Slide plate; 10. Gland head; 11. Terminal protective cover. Detailed Implementation

[0027] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0028] like Figure 3 As shown, the terminal protective cover 11 provided in this embodiment includes a first flange plate 4, a wall plate 5, a lower side plate 6, a second flange plate 7, a cover plate 8, a slide plate 9, and a gland head 10.

[0029] The wall panel 5 includes a first plate 51 extending in the Y direction and two second plates 52 perpendicularly connected to the two ends of the first plate 51 in the Y direction. The first plate 51 and the two second plates 52 form an n-shape in the Y direction. One end of the wall panel 5 in the X direction is connected to a first flange plate 4. The other end of the wall panel 5 in the X direction is connected to a second flange plate 7. The bottom of the n-shaped wall panel 5 has a lower side plate 6, which has at least two mounting surfaces 61, and the at least two mounting surfaces 61 are not on the same plane. The X direction and the Y direction are perpendicular to each other on the same top projection plane.

[0030] In this embodiment, the lower side plate 6 is formed into two mounting surfaces 61 by a single bending. The mounting surface 61 near the first flange plate 4 is a horizontal surface, and the mounting surface 61 near the second flange plate 7 is an upwardly sloping surface. Both mounting surfaces 61 are provided with through holes for mounting the gland 10. Alternatively, the lower side plate 6 can also be formed by multiple bending processes. Compared to... Figure 1 With one mounting surface 61, the installation space is larger with two mounting surfaces 61; compared to Figure 1 A horizontal mounting surface 61 increases the cable outlet space in different directions (horizontal, inclined, etc.). Figure 4 (As shown); both are conducive to installation.

[0031] like Figure 5 As shown, two rows of glands 10 are provided on the mounting surface 61 (which may be an inclined surface), or multiple rows. The two or more rows of glands 10 are staggered in the X direction, so that each cable 3 has sufficient tightening space for the corresponding gland 10.

[0032] like Figure 3 , Figure 4 As shown, a sliding plate 9 is provided on the inner surface of the lower end of the second flange plate 7 facing the gland 10. The sliding plate 9 is used to install a cable clamp (not shown), which provides secondary fixation for the cable 3 passing through the gland 10. The sliding plate 9 extends along the Y direction, or multiple sliding plates 9 are spaced apart in the Y direction.

[0033] A cover plate 8 is bolted to the second flange plate 7, and a handle 81 is provided on the outer surface of the cover plate 8. A sealing gasket is provided between the second flange plate 7 and the cover plate 8.

[0034] like Figure 4As shown, this utility model also provides a traction transformer, including a transmission oil tank 1 and the aforementioned terminal protection cover 11. The transmission oil tank 1 has multiple porcelain bushing terminals 2 on its side wall, and each porcelain bushing terminal 2 has at least one cable 3 (in this embodiment, one cable 3 is provided on one porcelain bushing terminal 2). A first flange plate 4 on the terminal protection cover 11 is connected to the transmission oil tank 1, and a sealing gasket is provided between the first flange plate 4 and the transmission oil tank 1. The cables 3 pass through the gland 10 one-to-one to the outside of the transmission oil tank 1. The gland 10 can fix the cables 3 and has a sealing function. Furthermore, when the external cable 3 has a shielding layer, the shielding layer can be grounded through the gland 10, eliminating the need for additional wiring and grounding sockets, resulting in a simpler and more reliable design.

[0035] The terminal protective cover 11 can be made of high-strength carbon steel or lightweight aluminum alloy, depending on the actual application scenario, to achieve the best performance.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A terminal protective cover, characterized in that, The wall panel (5) is formed into an n-shape in the Y direction, a first flange plate (4) connected to one end of the wall panel (5) in the X direction, a second flange plate (7) connected to the other end of the wall panel (5) in the X direction, and a lower side plate (6) connected to the bottom of the n-shaped wall panel (5). The lower side plate (6) is provided with at least two mounting surfaces (61), and the mounting surfaces (61) are provided with a plurality of glands (10) for terminal cables to pass through. The X direction and the Y direction are perpendicular to each other on the same top projection plane.

2. The terminal protective cover according to claim 1, characterized in that, At least two of the mounting surfaces (61) are not on the same plane.

3. The terminal protective cover according to claim 1 or 2, characterized in that, Of the at least two mounting surfaces (61), the mounting surface (61) closer to the first flange plate (4) is a horizontal surface, and the mounting surface (61) closer to the second flange plate (7) is an upwardly inclined slope.

4. The terminal protective cover according to claim 1 or 2, characterized in that, Multiple of the aforementioned granite heads (10) are staggered.

5. The terminal protective cover according to claim 1 or 2, characterized in that, It also includes a cover plate (8) connected to the second flange plate (7).

6. The terminal protective cover according to claim 5, characterized in that, A handle (81) is provided on the outer surface of the cover plate (8).

7. The terminal protective cover according to claim 1, characterized in that, The wall panel (5) includes a first plate (51) extending in the Y direction and a second plate (52) perpendicularly connected to both ends of the first plate (51) in the Y direction. The first flange plate (4) and the second flange plate (7) are respectively connected between the first plate (51) and the two second plates (52). The lower side plate (6) is connected between the two second plates (52). The first plate (51) and the lower side plate (6) are arranged vertically opposite each other.

8. The terminal protective cover according to claim 1, characterized in that, The second flange plate (7) has a sliding plate (9) on its inner surface facing the gland head (10). The sliding plate (9) extends along the Y direction, or multiple sliding plates (9) are spaced apart in the Y direction.

9. A traction transformer, comprising a transmission oil tank (1), wherein a plurality of porcelain bushing terminals (2) are provided on the side wall of the transmission oil tank (1), and each porcelain bushing terminal (2) is provided with at least one cable (3), characterized in that, It also includes a terminal protection cover as described in any one of claims 1-8, wherein a first flange plate (4) on the terminal protection cover is connected to the transmission oil tank (1), and the cable (3) passes through the gland head (10) one by one to the outside of the transmission oil tank (1).

10. The traction transformer according to claim 9, characterized in that, A sealing gasket is provided between the first flange plate (4) and the transmission oil tank (1).

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