Outdoor high-voltage current-limiting fuse

Abstract

This utility model provides an outdoor high-voltage current-limiting fuse, including a fuse tube body. A cover is provided at one end of the fuse tube body, and a movable contact is provided at the end of the fuse tube body near the cover. An adjustment component is provided between the movable contact and the cover. Multiple heat dissipation rings arranged axially along the outer periphery of the fuse tube body are provided, and the heat dissipation rings cooperate with the cover. A fixed contact is fixedly connected to the end of the fuse tube body away from the cover. A fuse wire is fixedly connected between the movable contact and the fixed contact located inside the fuse tube body. The position of the movable contact can be flexibly adjusted by the adjustment component, changing the distance between the movable and fixed contacts at both ends of the fuse, making it adaptable to fuse holders of different sizes and specifications. Compared with traditional fuses with fixed contact distances, this improves the product's versatility and reduces equipment procurement costs caused by fuse size mismatches when selecting power equipment.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, specifically an outdoor high-voltage current-limiting fuse. Background Technology

[0002] A high-voltage current-limiting fuse is a device used to protect circuits and equipment from overload current. It is typically used in high-voltage circuits. When the current exceeds a set current limit, the fuse automatically disconnects the circuit, preventing damage to the circuit and equipment. Currently, the distance between the contacts of existing high-voltage current-limiting fuses is usually a fixed value. This design limits the fuse's versatility, increases the difficulty and cost of selecting and maintaining power equipment, and makes it difficult to meet the diverse installation needs of power systems. Furthermore, most existing fuses use a single cylindrical housing structure, resulting in limited heat dissipation area and difficulty in quickly dissipating heat to the external environment. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an outdoor high-voltage current-limiting fuse to solve the problems mentioned in the background. This utility model has a novel structure, and the position of the movable contact can be flexibly adjusted by adjusting the components, changing the distance between the movable and fixed contacts at both ends of the fuse, so that it can be adapted to fuse holders of different sizes and specifications. Compared with traditional fuses with fixed contact distances, it improves the versatility of the product and reduces the equipment procurement costs caused by fuse size mismatch when selecting power equipment.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: an outdoor high-voltage current-limiting fuse includes a fuse tube body, a cover is provided at one end of the fuse tube body, a movable contact is provided at the end of the fuse tube body near the cover, an adjustment component is provided between the movable contact and the cover, a plurality of heat dissipation rings are provided on the outer wall periphery of the fuse tube body arranged along its axial direction, the heat dissipation rings cooperate with the cover, a fixed contact is fixedly connected at the end of the fuse tube body away from the cover, and a fuse wire is fixedly connected between the ends of the movable contact and the fixed contact located inside the fuse tube body.

[0005] Furthermore, a plurality of reinforcing ribs are fixedly connected to one side of the cover, and a plurality of grooves that cooperate with the plurality of reinforcing ribs are opened on the inner wall of the main body of the fusion tube, and a heat dissipation groove is opened on one side of each of the plurality of heat dissipation rings.

[0006] Furthermore, two symmetrically arranged fixing bolts are provided on the outer side of the plurality of heat dissipation rings, wherein the two symmetrically arranged grooves are provided with through holes that cooperate with the fixing bolts, and the two symmetrically arranged reinforcing ribs are provided with threaded holes that cooperate with the threads of the fixing bolts.

[0007] Furthermore, the fixed contact is provided with an impactor at its end, the movable contact is provided with a connecting strip on the side facing the inside of the fuse tube body, the cover is provided with a sliding groove that slides through and engages with the connecting strip, and one end of the fuse wire is fixedly connected to one end of the connecting strip.

[0008] Furthermore, the adjustment assembly includes an adjustment sleeve rotatably fitted to the end of the cover body, and an axially arranged annular limiting groove is provided at the end of the cover body. A first annular block is fixedly connected to the outer wall of the adjustment sleeve near one end of the cover body, and the first annular block is slidably fitted to the inner wall of the annular limiting groove.

[0009] Furthermore, an annular rotating groove is provided on the circumferential side of the movable contact facing the end of the cover, and a second annular block is fixedly connected to the inner wall of the adjusting sleeve near the movable contact end, and the second annular block is rotatably fitted into the inner wall of the second annular block.

[0010] Furthermore, the end of the cover is rotatably fitted with a rotating cylinder located inside the adjusting sleeve. The outer wall of the rotating cylinder is provided with a strip-shaped limiting groove, and the inner wall of the adjusting sleeve is fixedly connected with a strip-shaped block that slides in cooperation with the strip-shaped limiting groove.

[0011] Furthermore, the inner wall of the rotating cylinder is provided with internal threads, and a stud located inside the rotating cylinder and threadedly engaged with the internal threads is fixedly connected between the end of the movable contact and the end of the connecting bar.

[0012] The beneficial effects of this utility model are:

[0013] 1. This outdoor high-voltage current-limiting fuse can flexibly adjust the position of the moving contact through the adjustment component, changing the distance between the moving contact and the fixed contact at both ends of the fuse, so that it can be adapted to fuse bases of different sizes and specifications. Compared with traditional fuses with fixed contact distance, it improves the versatility of the product and reduces the equipment procurement cost caused by fuse size mismatch when selecting power equipment.

[0014] 2. This outdoor high-voltage current-limiting fuse increases the heat dissipation area and enhances heat exchange efficiency through the design of heat dissipation rings and heat dissipation grooves on the outer wall of the fuse tube. Under long-term high-load operation, it can effectively reduce the internal temperature of the fuse, reduce the performance degradation or premature melting of the fuse wire due to overheating, ensure the stability and reliability of the power supply system, and extend the overall service life of the fuse. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an outdoor high-voltage current-limiting fuse according to the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the main body of the fusion tube of this utility model from a side cross-section.

[0017] Figure 3 This is a schematic diagram of the connection between the main body of the fusion tube and the heat dissipation ring of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the adjustment component of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection between the adjusting component and the movable contact of this utility model.

[0020] In the diagram: 1. Fusible tube body; 2. Cover; 3. Movable contact; 4. Adjustment assembly; 401. Adjustment sleeve; 402. Annular limiting groove; 403. First annular block; 404. Annular rotating groove; 405. Second annular block; 406. Rotating cylinder; 407. Strip-shaped limiting groove; 408. Strip-shaped block; 409. Stud; 410. Internal thread; 5. Heat dissipation ring; 6. Heat dissipation groove; 7. Reinforcing rib; 8. Fusible wire; 9. Groove; 10. Fixing bolt; 11. Through hole; 12. Threaded hole; 13. Fixing contact; 14. Impactor; 15. Connecting strip; 16. Slide groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please refer to Figures 1 to 5 This utility model provides a technical solution: an outdoor high-voltage current-limiting fuse, including a fuse tube body 1, a cover 2 at one end of the fuse tube body 1, a movable contact 3 at the end of the fuse tube body 1 near the cover 2, an adjustment component 4 between the movable contact 3 and the cover 2, a plurality of heat dissipation rings 5 ​​arranged axially on the outer periphery of the fuse tube body 1, the heat dissipation rings 5 ​​cooperating with the cover 2, a fixed contact 13 fixedly connected at the end of the fuse tube body 1 away from the cover 2, and a fuse wire 8 fixedly connected between the movable contact 3 and the fixed contact 13 located inside the fuse tube body 1.

[0023] In this embodiment, a plurality of reinforcing ribs 7 are fixedly connected to one side of the cover 2. The inner wall of the fuse tube body 1 is provided with a plurality of grooves 9 that cooperate with the plurality of reinforcing ribs 7. A heat dissipation groove 6 is provided on one side of each of the plurality of heat dissipation rings 5. Two symmetrically arranged fixing bolts 10 are provided on the outer side of the plurality of heat dissipation rings 5. The two symmetrically arranged grooves 9 are provided with through holes 11 that cooperate with the fixing bolts 10. The two symmetrically arranged reinforcing ribs 7 are provided with threaded holes 12 that are threadedly engaged with the fixing bolts 10. An impactor 14 is provided at the end of the fixed contact 13. A connecting strip 15 is provided on the side of the movable contact 3 facing the inside of the fuse tube body 1. A sliding groove 16 that is slidably engaged with the connecting strip 15 is provided through the middle of the cover 2. One end of the fuse wire 8 is fixedly connected to one end of the connecting strip 15.

[0024] Specifically, the heat dissipation ring 5 on the outer wall of the fuse tube body 1 plays an important role. The heat dissipation grooves 6 opened on the heat dissipation ring 5 increase the heat dissipation area, accelerate the conduction and convection of heat to the external environment, dissipate the heat generated during the operation of the fuse in a timely manner, maintain the internal temperature within a reasonable range, and ensure the stable performance of the fuse wire 8.

[0025] In this embodiment, the adjusting component 4 includes an adjusting sleeve 401 rotatably fitted to the end of the cover 2. The end of the cover 2 has an axially arranged annular limiting groove 402. A first annular block 403 is fixedly connected to the outer wall of the adjusting sleeve 401 near the end of the cover 2. The first annular block 403 slides on the inner wall of the annular limiting groove 402. The movable contact 3 has an annular rotating groove 404 on its circumferential side facing the end of the cover 2. A second annular block 405 is fixedly connected to the inner wall of the adjusting sleeve 401 near the end of the movable contact 3. The shaped block 405 is rotatably fitted on the inner wall of the second annular block 405. The end of the cover 2 is rotatably fitted with a rotating cylinder 406 located inside the adjusting sleeve 401. The outer wall of the rotating cylinder 406 is provided with a strip-shaped limiting groove 407. The inner wall of the adjusting sleeve 401 is fixedly connected with a strip-shaped block 408 that slides with the strip-shaped limiting groove 407. The inner wall of the rotating cylinder 406 is provided with an internal thread 410. The end of the movable contact 3 and the end of the connecting strip 15 are fixedly connected with a stud 409 located inside the rotating cylinder 406 and threadedly fitted with the internal thread 410.

[0026] Specifically, the rotating adjusting sleeve 401 rotates around the end of the cover 2 by slidingly engaging the first annular block 403 with the annular limiting groove 402 of the cover 2. At the same time, the second annular block 405 on the inner wall of the adjusting sleeve 401 engages with the annular rotating groove 404 of the movable contact 3, causing the movable contact 3 to generate a relative motion tendency. Since the strip block 408 on the inner wall of the adjusting sleeve 401 slides with the strip limiting groove 407 on the outer wall of the rotating cylinder 406, the rotation of the adjusting sleeve 401 will drive the rotating cylinder 406 to rotate synchronously. The internal thread 410 on the inner wall of the rotating cylinder 406 engages with the stud 409 at the end of the movable contact 3, converting the rotational motion of the rotating cylinder 406 into the axial linear motion of the stud 409 and the movable contact 3, thereby changing the distance between the movable contact 3 and the fixed contact 13, so that the fuse can be adapted to fuse holders of different sizes and specifications.

[0027] When using the device, firstly, according to the actual fuse holder size, adjust the distance between the movable contact 3 and the fixed contact 13 at both ends of the fuse by rotating the adjusting sleeve 401. The adjusting sleeve 401 rotates through the sliding engagement of the first annular block 403 with the annular limiting groove 402 of the cover 2. The second annular block 405 on its inner wall engages with the annular rotating groove 404 of the movable contact 3, causing the movable contact 3 to move. At the same time, the strip block 408 on the inner wall of the adjusting sleeve 401 slides with the strip limiting groove 407 on the outer wall of the rotating cylinder 406, causing the rotating cylinder 406 to rotate synchronously. The internal thread 410 on the inner wall of the rotating cylinder 406 engages with the stud 409 at the end of the movable contact 3, converting the rotation into the axial movement of the movable contact 3. The line moves to fit the fuse holder. After installation, during normal circuit operation, current flows in from the fixed contact 13, passes through the fuse wire 8, and flows out from the movable contact 3 to form a circuit. At this time, the heat dissipation ring 5 and heat dissipation groove 6 on the outer wall of the fuse tube body 1 play a role, increasing the heat dissipation area and dissipating the heat generated during operation to the outside in a timely manner, maintaining the internal temperature stability and ensuring the normal performance of the fuse wire 8. When the circuit has an overload or short circuit fault, the current exceeds the rated current of the fuse wire 8, and the fuse wire 8 melts rapidly due to overheating, triggering the striker 14 at the end of the fixed contact 13 to act. The striker 14 sends a signal to the outside world that the fuse has melted by means of mechanical impact sound and indicator color change, prompting the staff to repair and handle the faulty circuit in time.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An outdoor high voltage current limiting fuse comprising a fuse link body (1) characterized in that: One end of the fuse tube body (1) is provided with a cover (2), and the end of the fuse tube body (1) near the cover (2) is provided with a movable contact (3). An adjustment component (4) is provided between the movable contact (3) and the cover (2). Multiple heat dissipation rings (5) are arranged along the axial direction on the outer wall of the fuse tube body (1). The heat dissipation rings (5) cooperate with the cover (2). A fixed contact (13) is fixedly connected to the end of the fuse tube body (1) away from the cover (2). A fuse wire (8) is fixedly connected between the ends of the movable contact (3) and the fixed contact (13) located inside the fuse tube body (1).

2. An outdoor high voltage current limiting fuse according to claim 1, characterized in that: The cover (2) is fixedly connected to one side with multiple reinforcing ribs (7), and the inner wall of the fusion tube body (1) is provided with multiple grooves (9) that cooperate with the multiple reinforcing ribs (7). Each of the multiple heat dissipation rings (5) is provided with a heat dissipation groove (6) on one side.

3. An outdoor high voltage current limiting fuse according to claim 2, characterized in that: Two symmetrically arranged fixing bolts (10) are provided on the outer side of the multiple heat dissipation rings (5), wherein the two symmetrically arranged grooves (9) are provided with through holes (11) that cooperate with the fixing bolts (10), and the two symmetrically arranged reinforcing ribs (7) are provided with threaded holes (12) that cooperate with the threads of the fixing bolts (10).

4. An outdoor high voltage current limiting fuse according to claim 3, characterized in that: The fixed contact (13) is provided with an impactor (14) at its end. The movable contact (3) is provided with a connecting strip (15) on the side facing the inside of the fuse tube body (1). The cover (2) is provided with a sliding groove (16) that slides through and engages with the connecting strip (15). One end of the fuse wire (8) is fixedly connected to one end of the connecting strip (15).

5. An outdoor high voltage current limiting fuse according to claim 1, characterized in that: The adjustment component (4) includes an adjustment sleeve (401) rotatably fitted at the end of the cover (2). The end of the cover (2) is provided with an axially arranged annular limiting groove (402). A first annular block (403) is fixedly connected to the outer wall of the adjustment sleeve (401) near the end of the cover (2). The first annular block (403) is slidably fitted on the inner wall of the annular limiting groove (402).

6. An outdoor high voltage current limiting fuse according to claim 5, characterized in that: The movable contact (3) has an annular rotating groove (404) on the periphery of the end of the cover (2). The adjusting sleeve (401) is fixedly connected to the inner wall of the end of the movable contact (3) with a second annular block (405). The second annular block (405) rotates and fits into the inner wall of the second annular block (405).

7. An outdoor high voltage current limiting fuse according to claim 6, characterized in that: The end of the cover (2) is rotatably fitted with a rotating cylinder (406) located inside the adjusting sleeve (401). The outer wall of the rotating cylinder (406) is provided with a strip-shaped limiting groove (407). The inner wall of the adjusting sleeve (401) is fixedly connected with a strip block (408) that slides with the strip-shaped limiting groove (407).

8. An outdoor high voltage current limiting fuse according to claim 7, characterized in that: The inner wall of the rotating cylinder (406) is provided with an internal thread (410), and a stud (409) located inside the rotating cylinder (406) and threadedly engaged with the internal thread (410) is fixedly connected between the end of the movable contact (3) and the end of the connecting bar (15).

Images