Fuse

Abstract

The utility model provides a fuse which comprises an insulating tube body and a fuse body, the fuse body is arranged inside the insulating tube body and comprises a plurality of conducting strips and bending parts which are arranged in a staggered mode, fusing holes which are arranged along a straight line are formed in the conducting strips, a first conducting strip located in the middle of the fuse body is provided with a tin layer, and a second conducting strip located in the middle of the fuse body is provided with a second tin layer. The two sides of the first conducting strip are each provided with a row of first fusing holes. The tin layer can enable the two sides of the first conducting strip to be heated more uniformly, so that the two sides of the first conducting strip are easier to break; besides, the bending part is arranged, and quartz sand is filled in the insulating tube body, so that on one hand, arc crossing is avoided, on the other hand, the contact area of the melt and the quartz sand is increased, heat conduction and dissipation are facilitated, and temperature rise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power, in particular to a fuse. Background Art

[0002] A fuse is an electrical device that generates heat to melt the fuse element and disconnect the circuit when the current exceeds a specified value. Existing fuses have the disadvantages of weak breaking capacity and low arc extinguishing ability. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the fuse in the prior art, such as weak breaking capacity and low arc extinguishing capacity, thereby providing a fuse with strong segmentation capacity and high arc extinguishing capacity.

[0004] To this end, the present invention provides a fuse, comprising an insulating tube body and a melt, wherein the melt is arranged inside the insulating tube body, the melt comprising a plurality of conductive sheets and bent portions arranged in an alternating manner, the conductive sheets being formed with fuse holes arranged in a straight line, wherein a first conductive sheet located in the middle of the melt is provided with a tin layer, and a row of first fuse holes is provided on each side of the first conductive sheet.

[0005] The diameter of the fuse hole is 3-5 mm.

[0006] There is a narrow diameter between two adjacent fuse holes, and the length of the narrow diameter is 1-3 mm and the width is 0.2-0.8 mm.

[0007] The fuse hole is in the shape of a pagoda, square, circle or diamond.

[0008] The melt is provided with 3-5 rows of the fuse holes.

[0009] It also includes: two end plates, which are respectively arranged on both sides of the insulating tube body; a blade, including a conductive plate arranged inside the insulating tube body, and a blade part vertically connected to the conductive plate and extending out of the end plate, and the conductive plate is welded to the melt.

[0010] Both ends of the melt are provided with bending pieces connected to the second conductive piece by bending and arranged in contact with the conductive plate.

[0011] A spacer is provided between the conductive plate and the end plate.

[0012] The cushion block is sleeved on the blade inserting portion.

[0013] The pad is formed with a mounting hole and a sand filling hole.

[0014] The technical solution of this utility model has the following advantages:

[0015] 1. The fuse provided by this utility model comprises a fuse element comprising a plurality of staggered conductive sheets and a bent portion. The conductive sheets are formed with fuse holes arranged in a straight line. A first conductive sheet located in the center of the fuse element is provided with a tin layer, and a row of first fuse holes is provided on either side of the first conductive sheet. The tin layer ensures more uniform heating on both sides of the first conductive sheet, thereby facilitating disconnection. Furthermore, the provision of the bent portion allows quartz sand to be filled inside the insulating tube, thereby preventing arcing and increasing the contact area between the fuse element and the quartz sand, facilitating heat conduction and reducing temperature rise.

[0016] 2. The fuse provided by the utility model has a blade comprising a conductive plate disposed within the insulating tube body and a blade portion perpendicularly connected to the conductive plate and extending beyond the end plate. Bend pieces are provided at both ends of the fuse element, which are bent and connected to the conductive plate and fitted to the conductive plate, making welding quicker and more convenient.

[0017] 3. In the fuse provided by the present invention, a spacer is provided between the conductive plate and the end plate, and the spacer can reduce the length of the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a cross-sectional view of the fuse of the present utility model;

[0020] Figure 2 is a stereogram of the melt;

[0021] Figure 3 A three-dimensional diagram of the fuse after removing the insulating tube;

[0022] Figure 4 Schematic diagram of the explosion structure of the fuse.

[0023] Explanation of the accompanying reference numerals: 1. Insulating tube body; 2. Melt; 3. Conductive sheet; 31. First conductive sheet; 32. Second conductive sheet; 4. Bending portion; 6. Fuse hole; 61. First fuse hole; 62. Second fuse hole; 7. Tin layer; 8. Narrow diameter; 9. End plate; 10. Insert blade; 11. Conductive plate; 12. Insert blade portion; 13. Bending sheet; 14. Pad; 15. Mounting hole; 16. Sand filling hole. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Example

[0029] This embodiment provides a fuse, such as Figure 1 and Figure 4 As shown, it includes an insulating tube body 1, a melt 2, a blade 10 and a spacer 14.

[0030] The melt 2 is arranged inside the insulating tube 1, as shown in FIG. Figure 2 As shown, the melt 2 includes a plurality of conductive sheets 3 and a bent portion 4 arranged in a staggered manner. The conductive sheets 3 are formed with fuse holes 6 arranged in a straight line. In this embodiment, 3-5 rows of fuse holes 6 are provided on the melt 2; Figure 1As shown, the first conductive sheet 31 located in the middle of the melt 2 is provided with a tin layer 7. In this embodiment, the tin layer 7 is formed by tinning. A row of first fuse holes 61 is provided on each side of the first conductive sheet 31, and a second conductive sheet 32 ​​is provided on both sides of the melt 2. A row of second fuse holes 62 is provided on the second conductive sheet 32. In this embodiment, the aperture of the fuse hole 6 is 3-5 mm, and there is a narrow diameter 8 between two adjacent fuse holes 6. The length of the narrow diameter 8 is 1-3 mm and the width is 0.2-0.8 mm. The fuse hole 6 is in the shape of a pagoda, square, circle or diamond. The apexes of the two rows of pagoda-shaped first fuse holes 61 can be set facing each other, oppositely, or in the same direction. It should be noted that the fuse hole 6 can also be formed in a polygonal or other shape.

[0031] The insulating tube body 1 is provided with end plates 9 on both sides.

[0032] Insert knife 10, such as Figure 3 and Figure 4 As shown, it includes a conductive plate 11 arranged inside the insulating tube body 1, and a blade portion 12 vertically connected to the conductive plate 11 and extending out of the end plate 9. The conductive plate 11 is welded to the melt 2, and both ends of the melt 2 are provided with a bending piece 13 that is bent and connected to the second conductive piece 32 and is fitted with the conductive plate 11.

[0033] The spacer 14 is disposed between the conductive plate 11 and the end plate 9. In this embodiment, the spacer 14 is sleeved onto the inserting portion 12. The spacer 14 is formed with a mounting hole 15 and a sand filling hole 16. After the fuse is assembled, quartz sand can be poured into the insulating tube 1 through the sand filling holes on the end plate 9 and the spacer 14.

[0034] In the fuse provided by the present invention, the tin layer 7 can make the two sides of the first conductive plate 31 heated more evenly, thereby making it easier to disconnect the two sides of the first conductive plate 31; in addition, by providing the bent portion 4, quartz sand is poured into the interior of the insulating tube body 1. This, on the one hand, avoids arcing, and on the other hand, increases the contact area between the melt and the quartz sand, which is conducive to heat conduction and reduces temperature rise.

[0035] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A fuse, characterized in that: include: Insulating tube body (1); A melt (2) is arranged inside the insulating tube body (1), and the melt (2) includes a plurality of conductive sheets (3) and a bent portion (4) arranged in a staggered manner. The conductive sheets (3) are formed with fuse holes (6) arranged along a straight line, wherein a first conductive sheet (31) located in the middle of the melt (2) is provided with a tin layer (7), and a row of first fuse holes (61) is provided on each side of the first conductive sheet (31).

2. The fuse according to claim 1, wherein: The diameter of the fuse hole (6) is 3-5 mm.

3. The fuse according to claim 1, wherein: There is a narrow diameter (8) between two adjacent fuse holes (6), and the length of the narrow diameter (8) is 1-3 mm and the width is 0.2-0.8 mm.

4. The fuse according to claim 1, wherein: The fuse hole (6) is in the shape of a pagoda, square, circle or diamond.

5. The fuse according to claim 1, wherein: The melt (2) is provided with 3-5 rows of the fuse holes (6).

6. The fuse according to claim 1, wherein: Also includes: Two end plates (9) are respectively arranged on both sides of the insulating tube body (1); The insert (10) comprises a conductive plate (11) arranged inside the insulating tube (1) and a insert portion (12) vertically connected to the conductive plate (11) and extending outside the end plate (9); the conductive plate (11) is welded to the melt (2).

7. The fuse according to claim 6, characterized in that Both ends of the melt (2) are provided with bending pieces (13) which are connected to the second conductive piece (32) by bending and are arranged in contact with the conductive plate (11).

8. The fuse according to claim 6 or 7, characterized in that: A spacer (14) is provided between the conductive plate (11) and the end plate (9).

9. The fuse according to claim 8, characterized in that The cushion block (14) is sleeved on the blade inserting portion (12).

10. The fuse according to claim 8, wherein: The cushion block (14) is formed with a mounting hole (15) and a sand filling hole (16).

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