High-voltage current-limiting fuse

Abstract

The invention relates to the field of fuses, in particular to a high-voltage current-limiting fuse which comprises a base, a mounting block and a heat dissipation mechanism, the upper surface of the base is fixedly connected with the mounting block, the heat dissipation mechanism is arranged in the mounting block, threaded holes are symmetrically formed in the outer wall of the mounting block in a penetrating mode, and the threaded holes are arranged in the mounting block. Threaded holes are formed in the upper surface of the base, the threaded holes extend into the base in a penetrating mode and are in threaded connection with fixing bolts, mounting holes are symmetrically formed in the upper surface of the base in a penetrating mode, fuse shells are mounted in the mounting holes, fuse bodies are fixedly connected to the inner walls of the fuse shells, and the heat dissipation hole area of the mounting blocks is increased; the fan blows out heat from the first heat dissipation holes and the second heat dissipation holes, by increasing the heat dissipation area and the heat dissipation hole area, dissipation of local heat of the fuse is accelerated, the service life of the fuse is prolonged, the use effect of the fuse is improved, the situation that impurities enter the installation block to damage the fuse when the temperature is not reduced is prevented, and the use safety of the fuse is improved.

Description

Technical Field

[0001] The invention relates to the field of fuses, in particular to a high-voltage current-limiting fuse. Background Art

[0002] A high-voltage current-limiting fuse is an important electrical safety protection device. Its main function is to prevent equipment damage and personal injury caused by circuit overload and short circuit faults by limiting the current in the circuit.

[0003] A high-voltage current limiting fuse has a serious imbalance in electric field strength at the high-voltage contact part due to the structure of the connector, resulting in a large amount of local discharge, which can easily cause local heating and seriously affect the service life and use effect of the current limiting fuse. Therefore, it is necessary to propose a high-voltage current limiting fuse. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a high-voltage current-limiting fuse.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-voltage current-limiting fuse, including a base, a mounting block and a heat dissipation mechanism, the upper surface of the base is fixedly connected with the mounting block, the interior of the mounting block is provided with a heat dissipation mechanism, the outer wall of the mounting block is symmetrically penetrated with threaded holes, the threaded holes extend into the base and are threadedly connected with fixing bolts, the upper surface of the base is symmetrically penetrated with mounting holes, the mounting holes are installed with a fuse housing, and the inner wall of the fuse housing is fixedly connected with a fuse body.

[0006] Specifically, the heat dissipation mechanism includes a first heat dissipation block, the outer wall of the mounting block is fixedly connected to the first heat dissipation block, the first heat dissipation block extends into the mounting block and abuts against the fuse shell, the outer wall of the first heat dissipation block is slidably connected to the second heat dissipation block, the inner walls on both sides of the mounting block are fixedly connected to a fixing box, the inner bottom wall of the fixing box is fixedly connected to a metal spring sheet, the upper surface of the metal spring sheet is fixedly connected to a conical top block, the lower surface of the second heat dissipation block is fixedly connected to a conical block, and the conical top block abuts against the conical block.

[0007] Specifically, one end of the mounting block is penetrated by a first heat dissipation hole, the inner wall of the first heat dissipation hole is slidably connected to a first air permeable block, one end of the first air permeable block extends outside the first heat dissipation hole and is fixedly connected to a pull rope, one end of the pull rope is fixedly connected to the conical top block, and the end of the first air permeable block away from the pull rope is symmetrically fixedly connected to a T-shaped block.

[0008] Specifically, second heat dissipation holes are opened on both sides of the mounting block, the inner wall of the second heat dissipation hole is slidably connected to the second air permeable block, the outer wall of the second air permeable block is fixedly connected to an arc block relative to the position of the conical fixed block, and the arc block is against the conical top block.

[0009] Specifically, the T-shaped block extends through and outside the mounting block and is fixedly connected with a first spring, and one end of the first spring is fixedly connected to the mounting block.

[0010] Specifically, one end of the second air-permeable block extends through the mounting block and is fixedly connected to a second spring, and one end of the second spring is fixedly connected to the mounting block.

[0011] Specifically, a cavity is provided inside the mounting block, and a fan is fixedly connected to the inner wall of the cavity.

[0012] Specifically, the first air permeable block and the first heat dissipation block are both arranged in an inclined shape relative to the fuse housing.

[0013] Beneficial effects of the present invention: (1) In the high-voltage current-limiting fuse described in the present invention, the temperature of the fuse rises locally, causing the temperature inside the mounting block to rise rapidly. The metal spring pushes the conical top block and the conical block to move. The conical block pushes the second heat dissipation block to contact the fuse shell, thereby increasing the heat dissipation area. At the same time, the conical top block pushes the first air permeable block out of the first heat dissipation hole and pushes the second air permeable block out of the second heat dissipation hole, thereby increasing the heat dissipation hole area of ​​the mounting block. The fan blows the heat out of the first heat dissipation hole and the second heat dissipation hole. By increasing the heat dissipation area and the heat dissipation hole area, the local heat dissipation of the fuse is accelerated, thereby increasing the service life and use effect of the fuse. (2) In the high-voltage current-limiting fuse described in the present invention, after the local temperature of the fuse is reduced, the metal spring retracts, the second heat dissipation block is separated from the fuse housing, the first spring pushes the first air permeable block to abut against the mounting block, and the second spring pushes the second air permeable block to face the mounting block, thereby blocking the first heat dissipation hole and the second heat dissipation hole, thereby preventing impurities from entering the mounting block and causing damage to the fuse when the temperature is not reduced, thereby increasing the safety of the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 A schematic diagram of the front structure of a high-voltage current-limiting fuse provided by the present invention; Figure 2 A schematic cross-sectional view of a high-voltage current-limiting fuse provided by the present invention; Figure 3 A schematic diagram of the moving structure of the second heat sink block of a high-voltage current-limiting fuse provided by the present invention; Figure 4A schematic diagram of the installation position structure of a first air permeable block of a high-voltage current limiting fuse provided by the present invention; Figure 5 A schematic diagram of the installation position structure of a second air permeable block of a high-voltage current limiting fuse provided by the present invention; Figure 6 A schematic diagram of the front view structure of a first heat sink block and a second heat sink block of a high-voltage current limiting fuse provided by the present invention; Figure 7 The present invention provides a schematic cross-sectional structure diagram of a fixing box of a high-voltage current-limiting fuse.

[0016] In the figure: 1. base; 2. mounting block; 3. heat dissipation mechanism; 31. first heat dissipation block; 32. second heat dissipation block; 33. conical block; 34. fixing box; 35. metal spring; 36. conical top block; 4. threaded hole; 5. fixing bolt; 6. fuse housing; 7. fuse body; 8. first heat dissipation hole; 9. first ventilation block; 10. pull rope; 11. T-shaped block; 12. second heat dissipation hole; 13. second ventilation block; 14. arc block; 15. first spring; 16. second spring; 17. fan. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figure 1-Figure 7 As shown, a high-voltage current-limiting fuse described in the present invention includes a base 1, a mounting block 2 and a heat dissipation mechanism 3. The upper surface of the base 1 is fixedly connected with the mounting block 2, and the interior of the mounting block 2 is provided with the heat dissipation mechanism 3. The outer wall of the mounting block 2 is symmetrically penetrated with threaded holes 4, and the threaded holes 4 extend into the base 1 and are threadedly connected with fixing bolts 5. The upper surface of the base 1 is symmetrically penetrated with mounting holes, and a fuse housing 6 is installed in the mounting holes. The inner wall of the fuse housing 6 is fixedly connected with a fuse body 7.

[0019] Among them, the heat dissipation mechanism 3 includes a first heat dissipation block 31, the outer wall of the mounting block 2 is fixedly connected with the first heat dissipation block 31, the first heat dissipation block 31 extends through the mounting block 2 and abuts against the fuse housing 6, the outer wall of the first heat dissipation block 31 is slidably connected with the second heat dissipation block 32, the inner walls on both sides of the mounting block 2 are fixedly connected with a fixing box 34, the inner bottom wall of the fixing box 34 is fixedly connected with a metal spring 35, the upper surface of the metal spring 35 is fixedly connected with a conical top block 36, the lower surface of the second heat dissipation block 32 is fixedly connected with a conical block 33, the conical top block 36 abuts against the conical block 33, and the metal spring 35 is made of memory metal.

[0020] Among them, one end of the mounting block 2 is penetrated by a first heat dissipation hole 8, the inner wall of the first heat dissipation hole 8 is slidably connected to a first air permeable block 9, one end of the first air permeable block 9 extends to the outside of the first heat dissipation hole 8 and is fixedly connected to a pull rope 10, one end of the pull rope 10 is fixedly connected to the conical top block 36, and the end of the first air permeable block 9 away from the pull rope 10 is symmetrically fixedly connected to a T-shaped block 11.

[0021] Among them, second heat dissipation holes 12 are opened on both sides of the mounting block 2, the inner wall of the second heat dissipation hole 12 is slidably connected with the second air permeable block 13, the outer wall of the second air permeable block 13 is fixedly connected with an arc block 14 relative to the position of the conical fixed block 36, and the arc block 14 is against the conical top block 36.

[0022] The T-shaped block 11 extends through and outside the mounting block 2 and is fixedly connected to a first spring 15 , and one end of the first spring 15 is fixedly connected to the mounting block 2 .

[0023] One end of the second air-permeable block 13 extends through the mounting block 2 and is fixedly connected to a second spring 16 , and one end of the second spring 16 is fixedly connected to the mounting block 2 .

[0024] A cavity is provided inside the mounting block 2, and a fan 17 is fixedly connected to the inner wall of the cavity.

[0025] The first ventilation block 9 and the first heat dissipation block 31 are both arranged in an inclined shape relative to the fuse housing 6 .

[0026] When in use, the fan 17 is connected to the external drive source through the controller, and the base 1 can be fixed to the outside of the fuse body 7 by the fixing bolts 5. The fan 17 blows air to the inside of the mounting block 2, and the heat generated by the fuse body 7 is dissipated through the first heat dissipation block 31. When the fuse body 7 locally releases a large amount of heat, the inside of the mounting block 2 quickly heats up, the metal spring 35 is heated, and the metal spring 35 pushes the conical top block 36 to move upward, and the conical top block 36 pushes the conical block 33 to move upward, and the conical block 33 pushes the second heat dissipation block 32 to resist the fuse housing 6, thereby increasing the heat dissipation area of ​​the first heat dissipation block 31. When the conical top block 36 moves, the first air permeable block 9 is pulled into the mounting block 2 by the pull rope 10. , expose the first heat dissipation hole 8, when the first air block 9 moves, it pulls the T-shaped block 11 to move and compresses the first spring 15, and the conical top block 36 simultaneously pushes the arc block 14 to move outward, and the arc block 14 pushes the second air block 13 to move out of the second heat dissipation hole 12, exposing the second heat dissipation hole 12, and compresses the second spring 16 when the second air block 13 moves. After the temperature of the fuse body 7 drops, the internal temperature of the mounting block 2 drops, the metal spring 35 retracts, and the second heat dissipation block 32 slides downward and separates from the fuse housing 6. The first spring 15 pushes the T-shaped block 11 and the first air block 9 to move into the first heat dissipation hole 8, and the second spring 16 pushes the second air block 13 to move into the second heat dissipation hole 12.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-voltage current-limiting fuse, comprising a base (1), a mounting block (2) and a heat dissipation mechanism (3), characterized in that: The upper surface of the base (1) is fixedly connected to a mounting block (2), a heat dissipation mechanism (3) is provided inside the mounting block (2), the outer wall of the mounting block (2) is symmetrically penetrated with threaded holes (4), the threaded holes (4) extend through the base (1) and are threadedly connected with fixing bolts (5), the upper surface of the base (1) is symmetrically penetrated with mounting holes, a fuse housing (6) is installed in the mounting holes, and a fuse body (7) is fixedly connected to the inner wall of the fuse housing (6).

2. A high voltage current limiting fuse according to claim 1, characterized in that: The heat dissipation mechanism (3) comprises a first heat dissipation block (31), the outer wall of the mounting block (2) is fixedly connected to the first heat dissipation block (31), the first heat dissipation block (31) extends through the mounting block (2) and abuts against the fuse housing (6), the outer wall of the first heat dissipation block (31) is slidably connected to the second heat dissipation block (32), the inner walls on both sides of the mounting block (2) are fixedly connected to a fixing box (34), the inner bottom wall of the fixing box (34) is fixedly connected to a metal spring (35), the upper surface of the metal spring (35) is fixedly connected to a conical top block (36), the lower surface of the second heat dissipation block (32) is fixedly connected to a conical block (33), and the conical top block (36) abuts against the conical block (33).

3. A high voltage current limiting fuse according to claim 1, characterized in that: One end of the mounting block (2) is penetrated by a first heat dissipation hole (8), the inner wall of the first heat dissipation hole (8) is slidably connected to a first air permeable block (9), one end of the first air permeable block (9) extends outside the first heat dissipation hole (8) and is fixedly connected to a drawstring (10), one end of the drawstring (10) is fixedly connected to a conical top block (36), and one end of the first air permeable block (9) away from the drawstring (10) is symmetrically fixedly connected to a T-shaped block (11).

4. A high voltage current limiting fuse according to claim 1, characterized in that: Second heat dissipation holes (12) are provided on both sides of the mounting block (2); the inner wall of the second heat dissipation hole (12) is slidably connected to a second air permeable block (13); the outer wall of the second air permeable block (13) is fixedly connected to an arc block (14) at a position relative to the conical fixed block (36); the arc block (14) abuts against the conical top block (36).

5. A high voltage current limiting fuse according to claim 1, characterized in that: The T-shaped block (11) extends through the outside of the mounting block (2) and is fixedly connected to a first spring (15); one end of the first spring (15) is fixedly connected to the mounting block (2).

6. A high voltage current limiting fuse according to claim 1, characterized in that: One end of the second air permeable block (13) extends through the inside of the mounting block (2) and is fixedly connected to a second spring (16); one end of the second spring (16) is fixedly connected to the mounting block (2).

7. A high voltage current limiting fuse according to claim 1, characterized in that: A cavity is provided inside the mounting block (2), and a fan (17) is fixedly connected to the inner wall of the cavity.

8. A high voltage current limiting fuse according to claim 1, characterized in that: The first air permeable block (9) and the first heat dissipation block (31) are both arranged in an inclined shape relative to the fuse housing (6).

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