A highly reliable fuse

Abstract

This utility model relates to the field of fuse technology, and in particular to a high-reliability fuse, comprising a fuse frame, a terminal block connected to the side of the fuse frame by a screw thread, a copper wire fixedly installed inside the fuse frame, the two ends of the copper wire connected between the surfaces of two terminal blocks, an arc extinguishing coil fixedly connected to the surface of the terminal block, a fuse wire fixedly installed on the terminal block on the right side, and an alarm box fixedly connected to the left side of the fuse frame. The alarm box has a winding wheel rod rotatably connected inside via a torsion spring. This utility model improves the warning effect by setting multiple fuse wires inside the fuse for connection monitoring and adding an emergency pull structure to prevent the fuse from breaking. The use of a power failure alarm enhances the warning function and ensures the high reliability of the fuse's multiple connection warning function.

Description

Technical Field

[0001] This utility model relates to a highly reliable fuse and belongs to the field of fuse technology. Background Technology

[0002] A fuse is an electrical device that breaks the circuit by melting a fusible element when the current exceeds a specified value. Fuses are current protection devices that are widely used in high and low voltage power distribution systems, control systems, and electrical equipment as short-circuit and overcurrent protectors.

[0003] For example, a high-reliability fuse with patent number CN202420401327.9 includes a base, a fuse tube assembly, and a cover. The fuse tube assembly includes two conductive clips, a handle, a fuse tube, and two terminals. One end of the conductive clip has two symmetrically distributed elastic clamping pieces. The inner wall of the two elastic clamping pieces is provided with an arc-shaped contact groove that fits onto the conductive cylinder of the fuse tube. The outer wall of each of the two elastic clamping pieces is provided with two reinforcing ribs, and a positioning groove is formed between the two reinforcing ribs. A retaining spring is provided on the conductive clip and engaged in the positioning groove. The other end of the conductive clip has a conductive piece inserted into the terminal. Two bent reinforcing flanges are symmetrically distributed on the conductive piece, and the two bent reinforcing flanges are respectively attached to the upper end surface of the conductive piece.

[0004] As the above-mentioned protection is achieved through the fuse tube inside the fuse, a single fuse tube can detect and disconnect the overcurrent, but the fuse wire in a single fuse tube may break due to prolonged use, and the warning function is relatively simple and may be difficult for staff to notice, which has certain adverse effects on actual use. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a highly reliable fuse. This invention solves the problems mentioned in the background art by setting multiple fuse wires inside the fuse for connection monitoring and adding an emergency pull structure to avoid the protective effect after the fuse wires break. The power failure alarm can improve the warning function.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A highly reliable fuse includes a fuse frame. A terminal block is threadedly connected to the side of the fuse frame via a screw. A copper wire is fixedly installed inside the fuse frame, with both ends of the copper wire connected between the surfaces of two terminal blocks. An arc-extinguishing coil is fixedly connected to the surface of each terminal block. A fuse wire is fixedly installed in the terminal block on the right side. An alarm box is fixedly connected to the left side of the fuse frame. A winding wheel is rotatably connected inside the alarm box via a torsion spring. The surface of the winding wheel is wound around the surface of the fuse wire. One end of the fuse wire is fixedly connected to the terminal block on the left side. A locking assembly is connected to the top of the winding wheel. A spring telescopic rod is connected to the surface of the locking assembly. A sealing baffle is rotatably connected to the left side of the alarm box via a hinge. A connecting bracket is fixedly connected to the side of the sealing baffle near its top. The top of the spring telescopic rod engages with the bottom of the connecting bracket.

[0008] Furthermore, the number of fuses is two, and the two fuses are connected vertically in the fuse frame.

[0009] Furthermore, the main body of the winding wheel rod is an anti-slip round rod, and a constraint side plate is fixedly connected to the surface of the anti-slip round rod.

[0010] Furthermore, a wear-resistant pad is fixedly connected to the surface of the constraint side plate, and the surface of the wear-resistant pad is coated with a flame-retardant coating.

[0011] Furthermore, the locking assembly includes a locking plate and a locking slot. The locking plate is fixedly connected to the bottom of the spring telescopic rod, and the locking slot is opened on the top of the take-up wheel rod. The inner wall of the locking slot and the surface of the locking plate are magnetically engaged and adapted to each other.

[0012] Furthermore, the alarm box has an inner groove on its side, a stabilizing frame is fixedly installed inside the inner groove, a lifting slot plate is fixedly connected to the surface of the stabilizing frame, a sliding plate is slidably connected to the inner wall of the lifting slot plate, a compression spring is fixedly connected between the surface of the sliding plate and the surface of the inner wall of the lifting slot plate, an emergency rotating rod frame is rotatably connected to the surface of the sliding plate through a bearing, and a tough pull rope is fixedly connected between the surface of the emergency rotating rod frame and the surface of the sealing baffle.

[0013] Furthermore, a power failure alarm is fixedly installed at the bottom of the inner wall of the stabilizer frame, and the power failure alarm is located directly below the emergency rotating pole frame.

[0014] The beneficial effects of this utility model are:

[0015] 1. In this utility model, the fuse frame is internally connected with basic copper strips and fuse wires. The two fuse wires can be used in conjunction to avoid the situation where a single fuse wire breaks due to prolonged use. If the current passing through the fuse exceeds the specified value for a period of time, the heat generated by the fuse itself will melt the fusible element, thereby breaking the circuit and causing the fuse wire to break. This allows the winding wheel rod in the alarm box to rotate and reset under the control of the torsion spring, thereby releasing the tension of the sealing baffle. The addition of a spring telescopic rod can play a buffering role, allowing the winding wheel rod to move the sealing baffle. During subsequent maintenance and replacement work, the spring telescopic rod can be removed in advance under the locking constraint of the locking component, enhancing the convenience of manual adjustment of the sealing baffle. After the entire fuse is de-energized, the power failure alarm will be notified, providing multiple ways to warn surrounding personnel and ensuring the high reliability of the fuse's multiple connection warning function.

[0016] 2. In this utility model, after the fuse on the sealing baffle is broken, the flexible pull rope will be pulled to move after the sealing baffle is moved. The flexible pull rope can pull the emergency rotating frame to swing. Under the elastic support of the sliding plate and the compression spring, the sealing baffle can be limited and buffered after the fuse is suddenly broken, which plays a certain role in protection. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the specific embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the overall structure of a highly reliable fuse according to this utility model;

[0019] Figure 2 This is a front cross-sectional view of a high-reliability fuse according to this utility model;

[0020] Figure 3 This is a schematic diagram of the alarm box in a high-reliability fuse according to this utility model;

[0021] Figure 4 This is a schematic diagram of the terminal block in a high-reliability fuse according to this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the spring telescopic rod in a high-reliability fuse according to this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the stabilizer in a high-reliability fuse according to this utility model;

[0024] Figure 7This is an enlarged view of point A of a high-reliability fuse according to this utility model;

[0025] The following are the labels in the diagram: 1. Fuse frame; 2. Terminal block; 3. Copper strip wire; 4. Arc extinguishing coil; 5. Fuse wire; 6. Alarm box; 7. Rewinding wheel rod; 8. Spring telescopic rod; 9. Sealing baffle; 10. Connecting bracket; 11. Restraining side plate; 12. Wear-resistant pad; 13. Locking plate; 14. Locking slot; 15. Stabilizing frame; 16. Lifting slot plate; 17. Sliding plate; 18. Compression spring; 19. Emergency rotating rod frame; 20. Tough pull rope; 21. Power failure alarm. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Example 1 Figures 1-7 This utility model provides a technical solution:

[0028] A highly reliable fuse includes a fuse frame 1. A terminal block 2 is threadedly connected to the side of the fuse frame 1 via a screw. A copper wire 3 is fixedly installed inside the fuse frame 1, with both ends of the copper wire 3 connected between the surfaces of two terminal blocks 2. An arc-extinguishing coil 4 is fixedly connected to the surface of each terminal block 2. A fuse wire 5 is fixedly installed on the right-side terminal block 2. An alarm box 6 is fixedly connected to the left side of the fuse frame 1. A winding wheel 7 with a torsion spring is rotatably connected inside the alarm box 6. The surface of the winding wheel 7 is wound around the surface of the fuse wire 5. One end of the fuse wire 5 is fixedly connected to the terminal block 2 on the left side. A locking assembly is connected to the top of the winding wheel 7, and a spring telescopic rod 8 is connected to the surface of the locking assembly. A sealing baffle 9 is rotatably connected to the left side of the alarm box 6 via a hinge. A connecting bracket 10 is fixedly connected to the side of the sealing baffle 9 near its top. The top of the spring telescopic rod 8 and the bottom of the connecting bracket 10 are engaged.

[0029] Specifically, such as Figures 1-7 As shown, there are two fuses 5, which are connected vertically in the fuse frame 1. The two fuses 5 can be used in conjunction to prevent a single fuse 5 from breaking due to prolonged use.

[0030] Furthermore, the main body of the winding wheel 7 is an anti-slip round rod, and a constraint side plate 11 is fixedly connected to the surface of the anti-slip round rod. A wear-resistant pad 12 is fixedly connected to the surface of the constraint side plate 11, and the surface of the wear-resistant pad 12 is coated with a flame-retardant coating. Excess length of the fuse 5 can be wound on the anti-slip round rod, which increases the restraining effect of the constraint side plate 11 in the front and rear directions of the fuse. Under the action of the wear-resistant pad 12, the edge of the fuse 11 can be protected against wear.

[0031] Specifically, such as Figures 1-7 As shown, the locking assembly includes a locking plate 13 and a locking slot 14. The locking plate 13 is fixedly connected to the bottom of the spring telescopic rod 8, and the locking slot 14 is located on the top of the winding wheel rod 7. The inner wall of the locking slot 14 and the surface of the locking plate 13 are magnetically engaged and adapted to each other. The spring telescopic rod 8 can be removed by using the locking plate 13 and the locking slot 14, enhancing the ease of manual adjustment of the sealing baffle 9. A power failure alarm 21 is fixedly installed at the bottom of the inner wall of the stabilizer 15, and the power failure alarm 21 is located directly below the emergency rotating rod frame 19. After the entire fuse is de-energized, the power failure alarm 21 will be notified to issue an alarm, providing multiple ways to warn surrounding personnel.

[0032] Please refer to Example 2 Figures 1-7 The difference between this embodiment and Embodiment 1 is that: the alarm box 6 has an inner groove on its side, and a stabilizing frame 15 is fixedly installed inside the inner groove. A lifting slot plate 16 is fixedly connected to the surface of the stabilizing frame 15. A sliding plate 17 is slidably connected to the inner wall of the lifting slot plate 16. A compression spring 18 is fixedly connected between the surface of the sliding plate 17 and the surface of the inner wall of the lifting slot plate 16. An emergency rotating rod frame 19 is rotatably connected to the surface of the sliding plate 17 through a bearing. A tough pull rope 20 is fixedly connected between the surface of the emergency rotating rod frame 19 and the surface of the sealing baffle 9. Under the elastic support of the sliding plate 17 and the compression spring 18, the sealing baffle 9 can be limited and buffered after the fuse 5 is suddenly broken, which plays a certain role in protection.

[0033] The working principle of this utility model is as follows: During use, the fuse frame 1 contains a basic copper strip 3 and a fuse wire 5. Two fuse wires 5 can be used in conjunction to prevent a single fuse wire 5 from breaking due to prolonged use. If the current passing through the fuse exceeds the specified value for a period of time, the heat generated by the fuse itself melts the fusible element, thus breaking the circuit. This causes the fuse wire 5 to break, allowing the winding wheel rod 7 in the alarm box 6 to rotate and reset under the control of the torsion spring. This releases the tension on the sealing baffle 9. The addition of a spring-loaded telescopic rod 8 provides a buffer connection, allowing the winding wheel rod 7 to move in conjunction with the sealing baffle 9. In subsequent... During maintenance and replacement, the spring telescopic rod 8 can be removed in advance through the locking plate 13 and locking slot 14, enhancing the ease of manual adjustment of the sealing baffle 9. After the sealing baffle 9 moves, it will pull the flexible rope 20 to move. The flexible rope 20 can pull the emergency rotating rod frame 19 to swing. Under the elastic support of the sliding plate 17 and the compression spring 18, the sealing baffle 9 can be limited and buffered after the fuse 5 is suddenly broken, which plays a certain degree of protection. After the fuse is completely de-energized, the power failure alarm 21 will be notified to issue an alarm, providing multiple ways to warn the surrounding staff and ensuring the high reliability of the fuse's multiple connection warning function.

[0034] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-reliability fuse, comprising a fuse frame (1), wherein a terminal block (2) is threadedly connected to the side of the fuse frame (1) via a screw, characterized in that: A copper strip wire (3) is fixedly installed inside the fuse frame (1). The two ends of the copper strip wire (3) are connected between the surfaces of two terminal blocks (2). An arc extinguishing coil (4) is fixedly connected to the surface of the terminal block (2). A fuse wire (5) is fixedly installed on the terminal block (2) on the right side. An alarm box (6) is fixedly connected to the left side of the fuse frame (1). A winding wheel rod (7) is rotatably connected inside the alarm box (6) via a torsion spring. The surface of the winding wheel rod (7) is wound and connected to the surface of the fuse wire (5). One end of the fuse wire (5) is fixedly connected to the terminal block (2) on the left side. A locking component is connected to the top of the winding wheel rod (7). A spring telescopic rod (8) is connected to the surface of the locking component. A sealing baffle (9) is rotatably connected to the left side of the alarm box (6) via a hinge. A connecting bracket (10) is fixedly connected to the side of the sealing baffle (9) near its top. The top of the spring telescopic rod (8) and the bottom of the connecting bracket (10) are engaged.

2. The high-reliability fuse according to claim 1, characterized in that: The number of fuses (5) is two, and the two fuses (5) are connected in the fuse frame (1) in the vertical direction.

3. The high-reliability fuse according to claim 1, characterized in that: The main body of the take-up wheel rod (7) is an anti-slip round rod, and a constraint side plate (11) is fixedly connected to the surface of the anti-slip round rod.

4. A high-reliability fuse according to claim 3, characterized in that: The surface of the constraint side plate (11) is fixedly connected to a wear-resistant pad (12), and the surface of the wear-resistant pad (12) is coated with a flame-retardant coating.

5. A high-reliability fuse according to claim 1, characterized in that: The locking assembly includes a locking plate (13) and a locking slot (14). The locking plate (13) is fixedly connected to the bottom of the spring telescopic rod (8), and the locking slot (14) is opened on the top of the winding wheel rod (7). The inner wall of the locking slot (14) and the surface of the locking plate (13) are magnetically engaged and adapted.

6. A high-reliability fuse according to claim 1, characterized in that: The alarm box (6) has an inner groove on its side. A stabilizing frame (15) is fixedly installed inside the inner groove. A lifting slot plate (16) is fixedly connected to the surface of the stabilizing frame (15). A sliding plate (17) is slidably connected to the inner wall of the lifting slot plate (16). A compression spring (18) is fixedly connected between the surface of the sliding plate (17) and the surface of the inner wall of the lifting slot plate (16). An emergency rotating rod frame (19) is rotatably connected to the surface of the sliding plate (17) through a bearing. A tough pull rope (20) is fixedly connected between the surface of the emergency rotating rod frame (19) and the surface of the sealing baffle (9).

7. A high-reliability fuse according to claim 6, characterized in that: A power failure alarm (21) is fixedly installed at the bottom of the inner wall of the stabilizer (15), and the power failure alarm (21) is located directly below the emergency swing arm frame (19).

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