Choke transformer for railway

Abstract

The utility model discloses a choke transformer for a railway, which comprises a transformer body, a metal hoop, a coil and iron cores are arranged in the transformer body, and an adjusting mechanism is arranged among the transformer body, the metal hoop and the iron cores to adjust the distance between the iron cores. According to the choke transformer for the railway, the rotating adjusting ring is arranged on the surface of the metal hoop for limiting the position of the iron core in the transformer body, the adjusting rod capable of sliding is arranged in the adjusting ring, one contact block can be driven to slide through the adjusting rod, the distance between the two contact blocks is promoted to be changed, and then the iron core can be extruded; the width of a single iron core is changed, so that the distance between the two iron cores is changed, the width of an air gap between the iron cores is changed, the original air gap can be enlarged according to the requirement of a railway, saturation is not prone to being generated under large electrified pulse current, and the problem of'red flashing 'on the railway is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of choke transformers, in particular to a choke transformer for railways. Background Art

[0002] Railway choke transformer is a kind of power transformer specially used in railway electrification system. Its main function is to provide stable power supply for electric locomotives in electrified railway traction power supply system.

[0003] According to the search of China Invention Publication No.: CN215643954U, a choke transformer for railways is disclosed, including a box body and an opening and closing cover connected to the upper side of the box body, a traction coil and a transformer are arranged in the box body, and a plurality of evenly distributed mounting plates are arranged on the rear side plate of the box body, and two traction bolts arranged in parallel are arranged on the mounting plates, one end of the traction bolt is connected to the traction coil, and the other end of the traction bolt passes through the rear side plate and extends to the outside of the box body to connect with the signal line on the railway; the outer sides of the two traction bolts arranged in parallel are provided with a protective sleeve, and the bottom end of the protective sleeve is provided with a card interface, and a card connection assembly connected to the card interface is provided on the mounting plate. The utility model adopts a choke transformer for railways with the above structure, and is provided with a traction bolt protective sleeve to protect the traction bolt, thereby extending the service life of the traction bolt and facilitating the transportation of the choke transformer.

[0004] However, when implementing the above technical scheme, there are the following problems: the above scheme can realize that the traction bolt protective cover protects the traction bolt to facilitate the transportation of the choke transformer, but the air gap distance between the internal iron cores of the choke transformer used in the above scheme and the existing railway is fixed, and the unbalanced traction pulse current causes the choke transformer to be saturated for a short time, which will cause the 25Hz series track circuit to "flash red". For this reason, the utility model provides a choke transformer for railways. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a railway choke transformer, which solves the problem that the air gap inside the railway choke transformer is fixed and difficult to adjust, and the "flashing red" problem occurs when unbalanced traction pulse current passes through.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a railway choke transformer, including a transformer body, a metal hoop, a coil and an iron core are arranged inside the transformer body, and an adjustment mechanism is arranged between the transformer body, the metal hoop and the iron core to adjust the distance between the iron cores, and the adjustment mechanism includes:

[0007] An operating assembly, an operating shaft rotating inside the transformer body, the operating shaft passes through the metal hoop and the surface rotates inside the metal hoop, and a limiting assembly is arranged between the operating shaft and the transformer body to achieve angle limitation;

[0008] An adjusting component, an adjusting ring rotating with the bottom of the metal hoop, one end of the adjusting ring is fixed to one end of the operating shaft, an adjusting rod is slidingly adjusted inside the adjusting ring, a sliding component is arranged between the adjusting rod and the adjusting ring to realize sliding limitation, a contact block is fixed on the surface of the metal hoop and the adjusting rod, a moving component is arranged between the adjusting rod and the metal hoop to realize moving limitation, and an adjusting spring is fixed between the contact block on the surface of the adjusting rod and the metal hoop.

[0009] Preferably, the limiting assembly includes an elastic rod that rotates inside the transformer body, and the upper width of the elastic rod is relatively large.

[0010] Preferably, a limiting groove is provided on the surface of the operating shaft, and the shape of the limiting groove corresponds to the shape of the upper side of the elastic rod.

[0011] Preferably, the sliding assembly comprises a sliding ring fixed on the surface of the adjusting rod, and a sliding groove is provided inside the adjusting ring.

[0012] Preferably, the surface of the sliding ring slides with the inner surface of the sliding groove.

[0013] Preferably, the moving assembly includes a moving rod fixed on the surface of the metal hoop, a moving groove is provided inside the adjusting rod, and the surface of the moving rod slides with the inner surface of the moving groove.

[0014] Beneficial Effects

[0015] The utility model provides a choke transformer for railways. Compared with the prior art, it has the following beneficial effects:

[0016] (1) The railway choke transformer is provided with a rotating adjustment ring on the surface of a metal hoop that limits the position of the iron core inside the transformer body, and a slidable adjustment rod is provided inside the adjustment ring. The adjustment rod can drive one of the contact blocks to slide, thereby causing the distance between the two contact blocks to change, thereby squeezing the iron core, changing the width of a single iron core, and thereby changing the distance between the two iron cores, thereby achieving a change in the width of the air gap between the iron cores. Furthermore, the original air gap can be increased according to the needs of the railway, and saturation is not easily generated under large electrification pulse current, thereby solving the "flashing red" problem on the railway.

[0017] (2) The railway choke transformer is characterized in that a movable rod is fixed inside a metal hoop, and the surface of the adjusting rod slides with the inside of the metal hoop. A movable groove is provided at one end of the adjusting rod. The movable rod is passed through the movable groove so that the surface of the movable rod slides with the inner surface of the movable groove, thereby ensuring that the movement of the adjusting rod is horizontal, and the contact block on the surface of the adjusting rod will not deviate from the surface of the iron core. The overall width of the iron core can be adjusted through the contact block, ensuring that the hardness of the iron core will not destroy the movement of the contact block, thereby preventing the deformation of the contact block from affecting the air gap width. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of the utility model from the first perspective;

[0019] Figure 2 This is a three-dimensional structural diagram of the iron core of the utility model from a first perspective;

[0020] Figure 3 This is a first-perspective exploded view of the contact block of the utility model;

[0021] Figure 4 For the utility model Figure 3 A magnified view of the local structure.

[0022] In the figure: 1-transformer body, 2-metal hoop, 3-iron core, 4-adjustment mechanism, 41-operating assembly, 411-operating shaft, 42-adjustment assembly, 421-adjustment ring, 422-adjustment rod, 423-contact block, 424-adjustment spring, 43-limiting assembly, 431-elastic rod, 432-limiting groove, 44-sliding assembly, 441-sliding ring, 442-sliding groove, 45-moving assembly, 451-moving rod, 452-moving groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 , the utility model provides two technical solutions:

[0025] Embodiment 1

[0026] A choke transformer for railways includes a transformer body 1, wherein a metal hoop 2, a coil and an iron core 3 are arranged inside the transformer body 1, and an adjustment mechanism 4 is arranged between the transformer body 1, the metal hoop 2 and the iron core 3 to adjust the distance between the iron cores 3, wherein the adjustment mechanism 4 includes:

[0027] An operating assembly 41, an operating shaft 411 rotating inside the transformer body 1, the operating shaft 411 passes through the metal hoop 2 and the surface rotates inside the metal hoop 2, and a limiting assembly 43 is provided between the operating shaft 411 and the transformer body 1 to achieve angle limitation;

[0028] An adjusting component 42, an adjusting ring 421 rotating with the bottom of the metal hoop 2, one end of the adjusting ring 421 is fixed to one end of the operating shaft 411, the fixing position of the adjusting ring 421 and the operating shaft 411 is not the center of the adjusting ring 421, an adjusting rod 422 is slidably moved inside the adjusting ring 421, a sliding component 44 is provided between the adjusting rod 422 and the adjusting ring 421 to achieve sliding restriction, a contact block 423 is fixed on the surface of the metal hoop 2 and the adjusting rod 422, the surface of the contact block 423 contacts with both sides of the iron core 3, the adjusting rod 422 passes through the metal hoop 2 and slides with the inside of the metal hoop 2, a moving component 45 is provided between the adjusting rod 422 and the metal hoop 2 to achieve moving restriction, an adjusting spring 424 is fixed between the contact block 423 on the surface of the adjusting rod 422 and the metal hoop 2;

[0029] A rotating adjustment ring 421 is arranged on the surface of the metal hoop 2 which limits the position of the iron core 3 inside the transformer body 1, and a slidable adjustment rod 422 is arranged inside the adjustment ring 421. The adjustment rod 422 can drive one of the contact blocks 423 to slide, thereby changing the distance between the two contact blocks 423, thereby squeezing the iron core 3, changing the width of a single iron core 3, and thereby changing the distance between the two iron cores 3, thereby changing the width of the air gap between the iron cores 3, and thereby increasing the original air gap according to the needs of the railway, making it less likely to produce saturation under large electrification pulse currents, thereby solving the "flashing red" problem on the railway.

[0030] Embodiment 2

[0031] The main difference from the first embodiment is:

[0032] A choke transformer for railways, wherein a limit assembly 43 includes an elastic rod 431 that rotates with the inside of a transformer body 1, one end of the elastic rod 431 is fixed to the inside of the transformer body 1, the upper width of the elastic rod 431 is relatively large, a limit groove 432 is provided on the surface of an operating shaft 411, and the shape of the limit groove 432 corresponds to the shape of the upper side of the elastic rod 431, a sliding assembly 44 includes a sliding ring 441 fixed on the surface of an adjusting rod 422, a sliding groove 442 is provided inside the adjusting ring 421, and the surface of the sliding ring 441 slides with the inner surface of the sliding groove 442, and a moving assembly 45 includes a moving rod 451 fixed on the surface of a metal hoop 2, and a moving rod 452 is provided inside the adjusting rod 422. The movable groove 452, the surface of the movable rod 451 slides with the inner surface of the movable groove 452, the movable rod 451 is fixed inside the metal hoop 2, and the surface of the adjusting rod 422 slides with the inside of the metal hoop 2, and the movable groove 452 is opened at one end of the adjusting rod 422. The movable rod 451 is passed through the movable groove 452 so that the surface of the movable rod 451 can slide with the inner surface of the movable groove 452, thereby ensuring that the movement of the adjusting rod 422 is horizontal, and then the contact block 423 on the surface of the adjusting rod 422 will not deviate from the surface of the iron core 3, and the overall width of the iron core 3 can be adjusted through the contact block 423 to ensure that the hardness of the iron core 3 will not destroy the movement of the contact block 423, thereby avoiding the deformation of the contact block 423 affecting the air gap width.

[0033] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] During operation, when it is necessary to adjust the air gap between the iron cores 3 inside the choke transformer, the operating shaft 411 on one side can be selectively adjusted. First, the elastic rod 431 is pushed toward the outside of the operating shaft 411 to disengage the surface of the elastic rod 431 from the inner surface of the limiting groove 432, and then the operating shaft 411 is rotated. The rotation of the operating shaft 411 will cause the adjustment ring 421 to rotate. During the rotation of the adjustment ring 421, the change in the edge position can drive the adjustment rod 422 to slide and change its position inside the transformer body 1. The position of the adjustment rod 422 changes the position of the contact block 423, and the distance between the two contact blocks 423 changes, which in turn squeezes the iron core 3, causing the width between the iron cores 3 to change, thereby increasing or decreasing the distance of the air gap between the iron cores 3.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A choke transformer for railway use, comprising a transformer body (1), characterized in that: The transformer body (1) is provided with a metal hoop (2), a coil and an iron core (3) inside, and an adjustment mechanism (4) is provided between the transformer body (1), the metal hoop (2) and the iron core (3) to adjust the distance between the iron cores (3), and the adjustment mechanism (4) comprises: An operating assembly (41) and an operating shaft (411) that rotates inside the transformer body (1); the operating shaft (411) passes through the metal hoop (2) and its surface rotates inside the metal hoop (2); a limiting assembly (43) is provided between the operating shaft (411) and the transformer body (1) to achieve angle limitation; An adjusting component (42), an adjusting ring (421) rotating with the bottom of the metal hoop (2), one end of the adjusting ring (421) being fixed to one end of the operating shaft (411), an adjusting rod (422) sliding inside the adjusting ring (421), a sliding component (44) being arranged between the adjusting rod (422) and the adjusting ring (421) to achieve sliding restriction, a contact block (423) being fixed on the surface of the metal hoop (2) and the adjusting rod (422), a moving component (45) being arranged between the adjusting rod (422) and the metal hoop (2) to achieve moving restriction, and an adjusting spring (424) being fixed between the contact block (423) on the surface of the adjusting rod (422) and the metal hoop (2).

2. A railway choke transformer according to claim 1, characterized in that: The limiting assembly (43) comprises an elastic rod (431) that rotates inside the transformer body (1); the elastic rod (431) has a larger upper width.

3. A railway choke transformer according to claim 2, characterized in that: A limiting groove (432) is provided on the surface of the operating shaft (411), and the shape of the limiting groove (432) corresponds to the shape of the upper side of the elastic rod (431).

4. A railway choke transformer according to claim 1, characterized in that: The sliding assembly (44) comprises a sliding ring (441) fixed on the surface of the adjusting rod (422), and a sliding groove (442) is provided inside the adjusting ring (421).

5. A railway choke transformer according to claim 4, characterized in that: The surface of the sliding ring (441) slides with the inner surface of the sliding groove (442).

6. A railway choke transformer according to claim 1, characterized in that: The moving assembly (45) includes a moving rod (451) fixed on the surface of the metal hoop (2), and a moving groove (452) is provided inside the adjusting rod (422). The surface of the moving rod (451) slides with the inner surface of the moving groove (452).

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