An arc-restraining type filled enclosed tube fuse

Abstract

The utility model relates to the technical field of electric power fittings, and disclose a kind of anti-arc reignition type with filler closed tube fuse, including fuse tube and the fuse link of being installed in the inside of fuse tube, the both ends of fuse tube are connected with connecting piece, the both ends of fuse link are connected with two connecting pieces respectively, and the end of two connecting pieces away from each other can be detachably connected with conducting head.The kind of anti-arc reignition type with filler closed tube fuse, by design detachable connecting structure, make conducting head can be realized with the quick disassembly of fuse tube end portion;When conducting head is damaged due to oxidation, electric erosion and other reasons, only need to replace the damaged conducting head part, and the functional perfect fuse tube can continue to use;This modular design not only improves the applicability and maintenance efficiency of fuse, but also effectively reduces the material waste and cost loss caused by overall replacement.

Description

Technical Field

[0001] This utility model relates to the field of power accessories technology, specifically to a filler-sealed tubular fuse with anti-arc reignition type. Background Technology

[0002] With the continuous development of power systems and the rapid growth of electricity load, the performance requirements for circuit protection devices are becoming increasingly stringent. As an important circuit protection device, fuses are widely used in power systems, industrial equipment, and civil buildings to protect circuits and equipment from damage caused by overload and short-circuit currents.

[0003] The patent with publication number CN208077928U discloses a double-indicator filler closed tube knife-shaped contact fuse, including a fuse tube with end caps at both ends. The fuse tube has a through installation channel, and a fusible element is placed in the installation channel. The fusible element includes two ends, and positioning caps are provided on the sides of the two ends. The two ends are connected by a fusible conductive sheet, which is located in the installation channel of the fuse tube. The ends protrude from the openings of the end caps. To prevent the fusible conductive sheet from shaking, a positioning flange is provided on the inner wall of the port of the installation channel. The positioning cap has a positioning port corresponding to the positioning flange. After the fusible conductive sheet is inserted into the installation channel, the positioning port of the positioning cap engages with the positioning flange to effectively fix and position the positioning cap.

[0004] However, the filled enclosed tube fuses mentioned above still have the following problems: In actual use, filled enclosed tube fuses are usually installed and replaced quickly through their ends and base; however, because the ends are exposed to the air environment for a long time, as the usage time increases, the surface of the ends is prone to electro-corrosion and oxidation, which leads to a gradual deterioration of their conductivity; this performance degradation will hinder the smooth flow of current and ultimately affect the normal function of the fuse. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a filler-sealed tubular fuse with arc reignition prevention, thereby improving the applicability of filler-sealed tubular fuses.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an arc-preventing, re-ignition type filled closed tube fuse, comprising a fuse tube and a fuse element installed inside the fuse tube. Both ends of the fuse tube are connected to connectors, and both ends of the fuse element are respectively connected to two connectors. The ends of the two connectors that are far apart from each other can be detachably connected to conductive heads.

[0007] Furthermore, both ends of the fusion tube are provided with connection holes, and two connectors are fixedly connected to the two connection holes respectively. The two connectors are provided with mounting holes on the sides that are far apart from each other, and the two conductive heads are connected to the two mounting holes respectively.

[0008] Furthermore, a mounting block is fixedly connected to one end of the conductive head, and the mounting block is threadedly connected to the mounting hole.

[0009] Furthermore, a conductive disk is fixedly connected to the end of the fuse piece after passing through the connector. The conductive disk is fixedly connected to the inner wall of the mounting hole, and the end of the mounting block away from the conductive head abuts against the conductive disk.

[0010] Furthermore, a compression cap is fixedly connected to the end of the mounting block away from the conductive head, and the end of the compression cap away from the mounting block abuts against the conductive disk, with a cavity between the compression cap and the mounting block.

[0011] Furthermore, the connectors are made of insulating materials.

[0012] Furthermore, the outer wall of the connector is fixedly connected to two reinforcing sealing rings, which are respectively fixedly connected to the inner wall and the outer wall of the fusion tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This type of arc-reignition-resistant, filled, sealed tube fuse features a detachable connection structure, allowing for quick assembly and disassembly of the contact head and the fuse tube end. When the contact head is damaged due to oxidation, electrolytic corrosion, or other reasons, only the damaged contact head needs to be replaced, while the intact fuse tube can continue to be used. This modular design not only improves the applicability and maintenance efficiency of the fuse but also effectively reduces material waste and cost losses caused by replacing the entire fuse. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall connection structure of this utility model;

[0016] Figure 2 This is an exploded view of the connection structure between the fusion tube and the two conductive heads of this utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the fusion tube connection structure of this utility model;

[0018] Figure 4 Based on Figure 3 Exploded view of the connection structure;

[0019] Figure 5 This is a cross-sectional schematic diagram of the conductive head connection structure of this utility model.

[0020] In the diagram: 1. Fusible tube; 2. Fuse piece; 3. Connector; 4. Conductive head; 5. Mounting block; 6. Conductive disc; 7. Extrusion cap; 8. Reinforcing sealing ring; 101. Connecting hole; 301. Mounting hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1 to 5 An arc-preventing, re-ignition type filled sealed tube fuse includes a fuse tube 1 and a fuse element 2 installed inside the fuse tube 1. Both ends of the fuse tube 1 are connected to connectors 3. Both ends of the fuse element 2 are connected to two connectors 3 respectively. The ends of the two connectors 3 that are far apart from each other can be detachably connected to conductive heads 4.

[0023] like Figures 1 to 5 As shown, the arc-reignition-resistant filled enclosed tube fuse of this utility model is structurally similar to existing filled enclosed tube fuses, such as the double-indicator filled enclosed tube knife-type contact fuse disclosed in patent publication number CN208077928U. The main improvement of this utility model is that the conductive head 4 can be replaced separately when the fuse element 2 inside the fuse tube 1 is intact, thereby improving the applicability of the fuse and reducing the cost of fuse wear. Figures 1 to 5 As shown, in the present invention, the anti-arc reignition type filled sealed tube fuse is used by installing the conductive head 4 on the connectors 3 at both ends of the fuse tube 1, together with the fuse element 2 inside the fuse tube 1 to form a complete sealed tube fuse. The conductive heads 4 at both ends are connected to the fuse mounting base. In the absence of a long-term fault, the conductive heads 4 at both ends are constantly exposed to air and in a conductive state, which may lead to damage due to oxidation, electrolytic corrosion, etc. This will prevent the conductive heads 4 from providing a stable current to the fuse element 2 inside the fuse tube 1, causing the fuse to fail to provide timely circuit protection against abnormalities. The detachable connection structure allows the conductive heads 4 to be quickly disassembled and assembled from the connectors 3 at the ends of the fuse tube 1. Therefore, when the conductive heads 4 are damaged due to oxidation, electrolytic corrosion, etc., only the damaged conductive head 4 needs to be replaced, while the intact fuse tube 1 and the fuse element 2 inside can continue to be used. This not only improves the applicability and maintenance efficiency of the fuse, but also effectively reduces the material waste and cost loss caused by replacing the entire fuse.

[0024] like Figures 1 to 5 As shown, both ends of the fusion tube 1 have through-holes 101. Two connectors 3 are fixedly connected to the two through-holes 101 respectively. Mounting holes 301 are provided on the opposite sides of the two connectors 3. Two conductive heads 4 are connected to the two mounting holes 301 respectively. The conductive heads 4 can be quickly installed to the connectors 3 at the ends of the fusion tube 1 through the mounting holes 301.

[0025] like Figures 1 to 5As shown, a mounting block 5 is fixedly connected to one end of the conductive head 4, and the mounting block 5 is threadedly connected to the mounting hole 301. When installing or replacing a new conductive head 4 at the end of the fusion tube 1, the mounting block 5 at the end of the conductive head 4 is screwed into the mounting hole 301 by means of threads, which quickly completes the installation of the conductive head 4 and the fusion tube 1, and improves the stability of the connection between the conductive head 4 and the fusion tube 1 after installation.

[0026] like Figures 1 to 5 As shown, the end of the fuse 2 passes through the connector 3 and is fixedly connected to a conductive disk 6. The conductive disk 6 is fixedly connected to the inner wall of the mounting hole 301, and the end of the mounting block 5 away from the conductive head 4 abuts against the conductive disk 6. The end of the fuse 2 can form good contact conductivity and contact area with the mounting block 5 through the conductive disk 6, thereby improving the conductivity and stability between the conductive head 4 and the fuse 2.

[0027] like Figures 1 to 5 As shown, a compression cap 7 is fixedly connected to the end of the mounting block 5 away from the conductive head 4. The end of the compression cap 7 away from the mounting block 5 abuts against the conductive disk 6, and there is a cavity between the compression cap 7 and the mounting block 5. During the process of screwing the mounting block 5 into the mounting hole 301, the compression cap 7, which has elastic rebound properties, makes contact with the conductive disk 6, which can form a better conductive contact surface between the compression cap 7 and the conductive disk 6. Furthermore, the rebound of the compression cap 7 makes it less likely for the mounting block 5 to fall off after being screwed into the mounting hole 301, thereby improving the stability of the conductivity between the fuse 2 and the conductive head 4.

[0028] like Figures 1 to 5 As shown, connector 3 is made of insulating material. Using insulating material for connector 3, mounting block 5, conductive head 4, compression cap 7, and conductive disc 6, all made of conductive material, ensures good conductivity between conductive head 4 and fuse element 2, while preventing arcing between mounting block 5 and connector 3. This improves the stability and safety of the fuse. It should be noted that connector 3 can be made of the same material as fuse tube 1, maintaining good heat dissipation and conduction while providing insulation.

[0029] like Figures 1 to 5 As shown, two reinforcing sealing rings 8 are fixedly connected to the outer wall of the connector 3. The two reinforcing sealing rings 8 are fixedly connected to the inner wall and outer wall of the fusion tube 1, respectively. The two reinforcing sealing rings 8 improve the sealing effect between the connector 3 and the end connection hole 101 of the fusion tube 1, ensuring that the inside of the fusion tube 1 maintains a sealed environment.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A type of filled sealed tubular fuse with anti-arc reignition, comprising a fuse tube (1) and a fuse element (2) installed inside the fuse tube (1), characterized in that: Both ends of the fusible tube (1) are connected to connectors (3), and both ends of the fusible piece (2) are connected to the two connectors (3) respectively. The ends of the two connectors (3) that are far apart from each other can be detachably connected to conductive heads (4).

2. The arc-prevention, re-ignition-resistant, filled, sealed tubular fuse according to claim 1, characterized in that: Both ends of the fusion tube (1) are provided with connection holes (101), and the two connectors (3) are fixedly connected to the two connection holes (101) respectively. The two connectors (3) are provided with mounting holes (301) on the side away from each other, and the two conductive heads (4) are connected to the two mounting holes (301) respectively.

3. The arc-prevention, re-ignition-resistant, filled, sealed tubular fuse according to claim 2, characterized in that: One end of the conductive head (4) is fixedly connected to a mounting block (5), and the mounting block (5) is threadedly connected to the mounting hole (301).

4. The arc-prevention, re-ignition-resistant, filled, sealed tubular fuse according to claim 3, characterized in that: The end of the fuse (2) is fixedly connected to the conductive disk (6) after passing through the connector (3). The conductive disk (6) is fixedly connected to the inner wall of the mounting hole (301). The end of the mounting block (5) away from the conductive head (4) abuts against the conductive disk (6).

5. The arc-prevention, re-ignition-resistant, filled, sealed tubular fuse according to claim 4, characterized in that: The end of the mounting block (5) away from the conductive head (4) is fixedly connected to a compression cap (7). The end of the compression cap (7) away from the mounting block (5) abuts against the conductive disk (6). There is a cavity between the compression cap (7) and the mounting block (5).

6. The arc-resistance type filled sealed tubular fuse according to claim 4, characterized in that: The connector (3) is made of insulating material.

7. The arc-prevention, re-ignition-resistant, filled, sealed tubular fuse according to claim 1, characterized in that: The outer wall of the connector (3) is fixedly connected to two reinforcing sealing rings (8), and the two reinforcing sealing rings (8) are fixedly connected to the inner wall and outer wall of the fusion tube (1) respectively.

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