Pulse transformer protection device

Abstract

The utility model relates to the technical field of transformers, and discloses a pulse transformer protection device which comprises a coil column, an annular frame used for fixing the coil column, a plurality of magnetic cores matched with the annular frame and a plurality of screw caps used for connecting the magnetic cores. The side faces of the opposite ends of the two magnetic cores are provided with receding grooves matched with the rotary cover, the inner walls of the receding grooves are fixedly connected with arc-shaped strips matched with the clamping blocks, and one faces of the arc-shaped strips are fixedly connected with limiting arc-shaped blocks matched with the clamping blocks. According to the utility model, the screw cap and the arc-shaped strip are arranged, the screw cap is rotated, the clamping block is clamped with the arc-shaped strip to connect and fix the magnetic core, when the magnetic core needs to be disassembled, the screw cap is rotated again to separate the clamping block from the arc-shaped strip, the magnetic core does not need to be heated at high temperature, and the effect of protecting the coil is achieved when the magnetic core is disassembled; the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a pulse transformer protection device. Background Art

[0002] The pulse transformer is mainly composed of a magnetic core (iron core) and a coil, which do not change their positions. From one or more electrical circuits, AC power is converted into AC voltage and current through electromagnetic induction. At the output end of the high-frequency transformer, high-frequency AC or DC power of different voltage levels is supplied to one or more power circuits. Therefore, when installing the pulse transformer on an electric vehicle charger, a protection device for the pulse transformer is required.

[0003] After searching, it is found that the prior art has made many improvements to the pulse transformer, such as the patent with the publication number CN216648029U, which discloses a pulse transformer, the winding core body includes: a columnar core; a first magnetic circuit core and a second magnetic circuit core connected to the two ends of the columnar core; a plurality of winding coils wound on the columnar core and connected to the electrode; the electrode ends of the first and second magnetic circuit cores are provided with electrodes matching the number of winding coils, and the two ends of each winding coil are respectively connected to the electrodes on the first and second magnetic circuit cores; the first and second magnetic circuit cores are set as an inclined surface on one side facing the columnar core, and the two ends of the winding coil climb to the electrode end along the inclined surface; the electrode is provided with an arc-shaped circular arc groove, which extends from the electrode end face to the electrode side, and the cross section of the circular arc groove is an arc shape; a set of opposite sides of the columnar core are set as smooth arc surfaces. This patent can effectively reduce the occurrence of failures due to damage to the winding coil.

[0004] The above patent has obvious beneficial effects, but still has the following shortcomings in actual operation:

[0005] In the prior art, when installing the magnetic core and the coil column, in order to improve the connection strength between the two, the magnetic core and the coil column are mostly bonded together by glue. When the magnetic core needs to be disassembled and repaired after the above installation method, the magnetic core and the coil column need to be heated at high temperature to melt the glue. However, during the high-temperature heating process, due to the lack of a protective device for the copper wire, the excessively high temperature can easily reduce the electromagnetic conversion rate of the copper wire, causing damage to the copper wire, thereby reducing the service life of the pulse transformer after repair. Therefore, a pulse transformer protection device is proposed. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a pulse transformer protection device. When the magnetic core is disassembled and repaired, there is no need to heat the magnetic core at high temperature, thereby increasing the service life of the pulse transformer after repair and achieving the effect of indirect protection of the copper wire.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pulse transformer protection device, comprising a coil column, an annular frame for fixing the coil column and a plurality of magnetic cores adapted to the annular frame, and also comprising a plurality of rotary covers for connecting the magnetic cores, one side of the rotary cover is fixedly connected with a symmetrical clamping block with an L-shaped cross section, and the side surfaces of the two facing ends of the two magnetic cores are provided with a clearance groove adapted to the rotary cover, the inner wall of the clearance groove is fixedly connected with an arc strip adapted to the clamping block, one side of the arc strip is fixedly connected with a limiting arc block adapted to the clamping block, and a limiting unit for limiting is provided between the limiting arc block and the clamping block.

[0008] Preferably, the limiting unit comprises a limiting strip fixedly connected to the side of the limiting arc block, and one side of the clamping block is provided with a limiting groove adapted to the limiting strip.

[0009] Preferably, a buckle groove is formed on a side of the rotary cover away from the clamping block.

[0010] Preferably, guide extrusion angles are provided at both ends of the arc strip.

[0011] Preferably, a heat dissipation groove is formed on the inner wall of the coil column, and a symmetrical air outlet connected to the heat dissipation groove is formed on the side surface of the annular frame.

[0012] Preferably, two side surfaces of the magnetic core are covered with rubber sleeves.

[0013] Preferably, the height of the rotary cover is not greater than the depth of the clearance groove.

[0014] In view of the deficiencies of the prior art, the utility model provides a pulse transformer protection device, which overcomes the deficiencies of the prior art. The beneficial effects of the utility model are:

[0015] 1. In the utility model, a rotary cover and an arc strip are provided. By rotating the rotary cover, the clamping block and the arc strip are engaged to connect and fix the magnetic core. When the magnetic core needs to be disassembled, the rotary cover is rotated again to separate the clamping block from the arc strip. There is no need to heat the magnetic core at a high temperature. When the magnetic core is disassembled, the copper coil is protected and its service life is extended.

[0016] 2. In the utility model, by providing air vents, etc., when the pulse transformer is in operation, the air vents are connected to the heat dissipation grooves in the coil column to dissipate heat inside the coil column, thereby accelerating the heat dissipation effect inside the coil column and extending its service life.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure when the rubber sleeve and the rotary cover are separated from the magnetic core in the utility model;

[0021] Figure 3 This is a schematic structural diagram of a cross-section of a coil column in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the rotary cover and the limiting arc block in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the clamping block in the utility model.

[0024] In the figure: 1. Coil column; 2. Arc strip; 3. Magnetic core; 4. Rubber sleeve; 5. Make way groove; 6. Limit arc block; 7. Screw cover; 8. Clamp block; 10. Limit strip; 11. Limit groove; 12. Heat dissipation groove; 13. Air outlet; 14. Ring frame; 15. Guide extrusion angle; 16. Buckle groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-Figure 5 A pulse transformer protection device comprises a coil column 1, an annular frame 14 for fixing the coil column 1 and a plurality of magnetic cores 3 matched with the annular frame 14, and also comprises a plurality of rotary covers 7 for connecting the magnetic cores 3, one side of the rotary cover 7 is fixedly connected with a symmetrical clamping block 8 with an L-shaped cross section, and the sides of the two facing ends of the two magnetic cores 3 are provided with a clearance groove 5 matched with the rotary cover 7, and the inner wall of the clearance groove 5 is fixedly connected with an arc strip 2 matched with the clamping block 8, and one side of the arc strip 2 is fixedly connected with a limiting arc block 6 matched with the clamping block 8, and a limiting unit for limiting is provided between the limiting arc block 6 and the clamping block 8.

[0027] Specifically, the two magnetic cores 3 are clamped on the upper and lower annular frames 14, the two ends of the two magnetic cores 3 are abutted against each other, and the clearance grooves 5 are aligned to form a circle that matches the rotary cover 7. The clamping block 8 is aligned with the gap between the two arc-shaped strips 2, and the rotary cover 7 is inserted into the clearance groove 5 and rotated to make the clamping block 8 engage with the limiting arc block 6, and continue to rotate the rotary cover 7 to limit the clamping block 8 through the limiting unit. When the magnetic core 3 needs to be disassembled and repaired, the rotary cover 7 is rotated again with force, and the clamping block 8 is disengaged from the limiting unit, and the rotary cover 7 is taken out of the clearance groove 5, and the two magnetic cores 3 can be separated. When disassembling the magnetic core 3, no high-temperature heating is required, which is convenient for the operator to operate, and can extend the service life of the copper wire, avoid high-temperature damage to the copper wire, and can also indirectly protect the coil column 1.

[0028] like Figure 5 , Figure 4 As shown, the limiting unit includes a limiting strip 10 fixedly connected to the side of the limiting arc block 6, and a limiting groove 11 adapted to the limiting strip 10 is opened on one side of the clamping block 8; when the clamping block 8 is rotated to the limiting strip 10, the limiting strip 10 has a certain elastic force, and the limiting groove 11 is adapted to the limiting strip 10 to fix the clamping block 8, thereby improving the stability of the two magnetic cores 3 after being connected.

[0029] like Figure 2 As shown, a buckle groove 16 is provided on the side of the rotary cover 7 away from the clamping block 8 to facilitate the operator to rotate the rotary cover 7.

[0030] like Figure 4 As shown, guide extrusion angles 15 are provided at both ends of the arc strip 2; the guide extrusion angles 15 have a guiding extrusion function, which can enable the clamping block 8 to continuously tighten the two magnetic cores 3 during the rotation process, making the connection of the magnetic cores 3 more stable.

[0031] like Figure 3 As shown, a heat dissipation groove 12 is provided on the inner wall of the coil column 1, and an air outlet 13 symmetrically connected to the heat dissipation groove 12 is provided on the side of the annular frame 14; the heat dissipation groove 12 in the coil column 1 is connected with the air outlet 13 on the annular frame 14, and an air flow channel is formed through the air outlet 13, so that the heat in the coil column 1 will be discharged through the air outlet 13, thereby reducing the temperature in the coil column 1, thereby achieving the effect of extending the service life of the entire device.

[0032] like Figure 1 , Figure 2 As shown, rubber sleeves 4 are sleeved on the sides of the two magnetic cores 3; the rubber sleeves 4 have elasticity and insulation effects. When the rubber sleeves 4 are sleeved on the sides of the magnetic cores 3, leakage current is reduced and heat generation is lowered.

[0033] like Figure 1 As shown, the height of the rotary cover 7 is not greater than the depth of the clearance groove 5 , which improves the integrity and insulation of the magnetic core 3 , while not preventing the rubber sleeve 4 from being sleeved on the sides of the two magnetic cores 3 .

[0034] The operating steps in this embodiment are as follows: after fixing the magnetic core 3 on the annular frame 14 at both ends of the coil column 1, align the clamping block 8 with the gaps in the two symmetrical limiting arc blocks 6, insert the rotary cover 7 into the clearance groove 5 and rotate the rotary cover 7 to make the clamping block 8 engage with the limiting arc block 6, and continuously pull the two magnetic cores 3 closer through the guide extrusion angle 15. When the clamping block 8 rotates to the limiting bar 10, the clamping block 8 engages with the limiting bar 10. At this time, the two magnetic cores 3 are in a fixed state. When the magnetic core 3 needs to be disassembled and repaired, the rotary cover 7 is rotated again, and the clamping block 8 is disengaged from the limiting bar 10, so that the magnetic core 3 can be separated, so that when the magnetic core 3 is disassembled and repaired, it does not need to be overheated, and the coil column 1 is indirectly protected, thereby extending its service life.

[0035] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pulse transformer protection device, comprising a coil post (1), an annular frame (14) for fixing the coil post (1), and a plurality of magnetic cores (3) adapted to the annular frame (14), characterized in that: The invention also comprises a plurality of rotary covers (7) for connecting the magnetic cores (3); one side of the rotary cover (7) is fixedly connected to a symmetrical clamping block (8) with an L-shaped cross section; the sides of the two magnetic cores (3) facing each other are provided with a clearance groove (5) adapted to the rotary cover (7); the inner wall of the clearance groove (5) is fixedly connected to an arc strip (2) adapted to the clamping block (8); one side of the arc strip (2) is fixedly connected to a limiting arc block (6) adapted to the clamping block (8); and a limiting unit for limiting is provided between the limiting arc block (6) and the clamping block (8).

2. A pulse transformer protection device according to claim 1, characterized in that: The limiting unit comprises a limiting strip (10) fixedly connected to the side of the limiting arc block (6), and a limiting groove (11) adapted to the limiting strip (10) is provided on one side of the clamping block (8).

3. A pulse transformer protection device according to claim 1, characterized in that: The rotating cover (7) is provided with a buckle groove (16) on a side away from the clamping block (8).

4. A pulse transformer protection device according to claim 1, characterized in that: Both ends of the arc strip (2) are provided with guide extrusion angles (15).

5. A pulse transformer protection device according to claim 1, characterized in that: The inner wall of the coil pole (1) is provided with a heat dissipation groove (12), and the side surface of the annular frame (14) is provided with a symmetrical air outlet (13) which is in communication with the heat dissipation groove (12).

6. A pulse transformer protection device according to claim 1, characterized in that: The side surfaces of the two magnetic cores (3) are covered with rubber sleeves (4).

7. A pulse transformer protection device according to claim 1, characterized in that: The height of the rotary cover (7) is no greater than the depth of the clearance groove (5).

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