Arc extinguishing structure of a fuse body

Abstract

The utility model discloses a fuse body arc extinguishing structure relates to fuse body arc extinguishing technical field, including casing and protection subassembly, casing's end portion is equipped with the cover, and the inner wall of casing is provided with ceramic inner layer, for the protection subassembly of external protection increase the impact resistance of setting in the end side of cover, and protection subassembly includes elastic arc lever, movable hole, movable rod, protection ring and rubber sheet, the middle part of elastic arc lever is equipped with movable hole, and the inside of movable hole is provided with movable rod, the end of movable rod is connected with protection ring, and the end of protection ring is connected with rubber sheet. This one kind of fuse body arc extinguishing structure is through the elastic arc lever of rubber material quality when receiving external force through the deformation of self reaches the buffering effect, avoids the damage of casing to influence the arc extinguishing function inside, and the movable hole is used for the engagement of movable rod and is installed, and the protection ring adopts the form of full coverage to the full protection effect of casing outside.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing technology of fuse elements, specifically to an arc extinguishing structure for fuse elements. Background Technology

[0002] Arc extinguishing structure of a fuse refers to a series of specific structures designed in a fuse to quickly extinguish the electric arc, prevent the arc from reigniting, and avoid damage to the surrounding environment and equipment caused by the arc. Arc extinguishing structure of a fuse is an important component that ensures that the arc can be effectively extinguished when the fuse is activated, thus ensuring the safe operation of electrical equipment.

[0003] However, existing fuses have poor external protection during use and are prone to deformation under external impact, leading to arc extinguishing failure. Utility Model Content

[0004] The purpose of this invention is to provide a fuse arc-extinguishing structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fuse arc extinguishing structure, comprising a shell and a protective component. A cover is installed at the end of the shell, and a ceramic inner layer is provided on the inner wall of the shell. The protective component, used for external protection and increasing impact resistance, is disposed on the end side of the cover. The protective component includes an elastic arc rod, a movable hole, a movable rod, a protective ring, and a rubber sheet. A movable hole is provided in the middle of the elastic arc rod, and a movable rod is disposed inside the movable hole. A protective ring is connected to the end of the movable rod, and a rubber sheet is connected to the end of the protective ring.

[0006] Furthermore, ten elastic arc rods are arranged in a ring around the center point of the cover, and the elastic arc rods and the movable holes are an integrated structure.

[0007] Furthermore, the movable hole and the movable rod are interlocked, and four movable rods are arranged in a ring around the protective ring.

[0008] Furthermore, an electrode lead is installed in the middle of the interior of the housing, and an arc-extinguishing component for extinguishing the arc is provided in the middle of the electrode lead.

[0009] Furthermore, the arc extinguishing assembly includes a separator box and thermal particles, and the thermal particles are disposed inside the separator box.

[0010] Furthermore, the arc-extinguishing assembly also includes a torsion spring, an arc-extinguishing rotating rod, and a movable electrode. The torsion spring is disposed inside the thermistor particle, and the arc-extinguishing rotating rod is connected to the side of the torsion spring. The movable electrode is connected to the end of the arc-extinguishing rotating rod.

[0011] Furthermore, a connecting piece is installed at the end of the lid, and the connecting piece is T-shaped.

[0012] Furthermore, the surface of the connecting piece is provided with a connecting hole, and the connecting piece and the connecting hole are an integral structure.

[0013] This utility model provides a fuse arc-extinguishing structure, which has the following beneficial effects:

[0014] 1. This utility model uses an elastic arc rod made of rubber to achieve a buffering effect through its own deformation when subjected to external force, so as to avoid damage to the shell and affect the internal arc extinguishing function. The movable hole is used for the locking and insertion of the movable rod, i.e. the installation of the protective ring. The protective ring adopts a full-coverage form to provide full protection for the outside of the shell.

[0015] 2. This utility model fills the arc chamber in the middle of the shell with arc-extinguishing oil, which can effectively control the arc and reduce its energy when the moving electrode and electrode lead are disconnected, thereby extinguishing the arc quickly. The thermistor particles fill the partition box and the torsion spring inside plays a role in resetting and blocking it. When the ambient temperature exceeds the operating temperature, the heat transmitted through the lead causes the thermistor particles to melt into a liquid state. At this time, the torsion spring drives the arc-extinguishing rod to rotate and disconnects the electrode lead. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the overall structure of the arc-extinguishing structure of the fuse body according to the present invention;

[0017] Figure 2 This is a schematic diagram of the arc-extinguishing assembly structure of the arc-extinguishing structure of the fuse body according to this utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of the arc-extinguishing structure of the fuse body according to the present invention.

[0019] In the diagram: 1. Shell; 2. Cover; 3. Electrode lead; 4. Arc extinguishing assembly; 401. Separator box; 402. Thermistor particles; 403. Torsion spring; 404. Arc extinguishing rotating rod; 405. Movable electrode; 5. Connecting piece; 6. Connecting hole; 7. Protective assembly; 701. Elastic arc rod; 702. Movable hole; 703. Movable rod; 704. Protective ring; 8. Ceramic inner layer. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figure 1As shown, a fuse arc-extinguishing structure includes a housing 1 and a protective component 7. A cover 2 is installed at the end of the housing 1. The protective component 7, which increases the impact resistance for external protection, is located on the end side of the cover 2. The protective component 7 includes an elastic arc rod 701, a movable hole 702, a movable rod 703, a protective ring 704, and a rubber sheet 705. The elastic arc rod 701 has a movable hole 702 in its middle. Ten elastic arc rods 701 are arranged in a ring around the center point of the cover 2. The elastic arc rod 701 and the movable hole 702 are an integrated structure. When subjected to external force, the rubber elastic arc rod 701 achieves a buffering effect through its own deformation, preventing damage to the housing 1 from affecting the internal arc extinguishing. The device has a function, and the movable hole 702 is provided with a movable rod 703 inside. The movable hole 702 is used for the engagement and insertion of the movable rod 703, i.e., the installation of the protective ring 704. The end of the movable rod 703 is connected to the protective ring 704. The movable hole 702 and the movable rod 703 are engaged. Four movable rods 703 are arranged in a ring around the protective ring 704. The protective ring 704 adopts a full-coverage form to provide full protection for the outside of the housing 1. The end of the protective ring 704 is connected to a rubber sheet 705. The end of the cover 2 is equipped with a connecting piece 5. The connecting piece 5 is T-shaped. The surface of the connecting piece 5 is provided with a connecting hole 6. The connecting piece 5 and the connecting hole 6 are an integrated structure.

[0022] like Figure 2 As shown, an electrode lead 3 is installed in the middle of the interior of the housing 1. The arc chamber in the middle of the housing 1 is filled with arc-extinguishing oil. When the movable electrode 405 and the electrode lead 3 are disconnected, the arc can be effectively controlled and its energy reduced, thereby extinguishing the arc quickly. An arc-extinguishing assembly 4 for extinguishing the arc is provided in the middle of the electrode lead 3. The arc-extinguishing assembly 4 includes a separator box 401 and thermal particles 402. The thermal particles 402 are provided inside the separator box 401. The thermal particles 402 fill the interior of the separator box 401 and are supported by a torsion spring 403. The function of the reset block is that when the ambient temperature exceeds the operating temperature, the heat transmitted through the lead wire causes the thermistor 402 to melt into a liquid state. At this time, the torsion spring 403 drives the arc-extinguishing rod 404 to rotate and disconnects the electrode lead wire 3. The arc-extinguishing assembly 4 also includes a torsion spring 403, an arc-extinguishing rod 404 and a movable electrode 405. The torsion spring 403 is provided inside the thermistor 402, and the arc-extinguishing rod 404 is connected to the side of the torsion spring 403. The movable electrode 405 is connected to the end of the arc-extinguishing rod 404. The inner wall of the housing 1 is provided with a ceramic inner layer 8.

[0023] In summary, the arc-extinguishing structure of this fuse is first based on Figures 1-3The structure shown uses a connecting piece 5 to fix the fuse element in place. During operation, when the ambient temperature exceeds the operating temperature, the heat transmitted through the lead wire melts the thermistor particles 402 into a liquid state, causing the external resistance of the torsion spring 403 to disappear. This causes the torsion spring 403 to rotate the arc-extinguishing rod 404 and disconnect the electrode lead wire 3. Because the arc chamber in the middle of the housing 1 is filled with arc-extinguishing oil, the arc can be effectively controlled and its energy reduced when the movable electrode 405 and the electrode lead wire 3 disconnect, thus extinguishing the arc rapidly. Under normal operation, the fuse element... When in use, if subjected to an external impact, the external force acts directly on the protective ring 704. The protective ring 704 deforms itself to buffer the impact, providing full protection to the outside of the housing 1 in a fully covered manner, thereby resisting external forces from all sides. The protective ring 704 can transfer the external force to the movable rod 703. The movable rod 703 consumes energy by moving in the movable hole 702. Furthermore, the elastic arc rod 701 made of rubber further achieves a buffering effect through its own deformation when subjected to external forces, preventing damage to the housing 1 from affecting the internal arc extinguishing function.

[0024] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A fuse arc-extinguishing structure, comprising a housing (1) and a protective component (7), characterized in that, The end of the housing (1) is fitted with a cover (2), and the inner wall of the housing (1) is provided with a ceramic inner layer (8). The protective component (7) for external protection and increased impact resistance is provided on the end side of the cover (2). The protective component (7) includes an elastic arc rod (701), a movable hole (702), a movable rod (703), a protective ring (704), and a rubber sheet (705). The elastic arc rod (701) has a movable hole (702) in the middle, and a movable rod (703) is provided inside the movable hole (702). The end of the movable rod (703) is connected to the protective ring (704), and the end of the protective ring (704) is connected to the rubber sheet (705).

2. The arc-extinguishing structure of a fuse element according to claim 1, characterized in that, The elastic arc rods (701) are arranged in a ring around the center point of the cover (2), and the elastic arc rods (701) and the movable hole (702) are an integrated structure.

3. The arc-extinguishing structure of a fuse element according to claim 1, characterized in that, The movable hole (702) and the movable rod (703) are engaged, and four movable rods (703) are arranged in a ring around the protective ring (704).

4. The arc-extinguishing structure of a fuse element according to claim 1, characterized in that, An electrode lead (3) is installed in the middle of the interior of the housing (1), and an arc extinguishing component (4) for extinguishing the arc is provided in the middle of the electrode lead (3).

5. The arc-extinguishing structure of a fuse element according to claim 4, characterized in that, The arc extinguishing component (4) includes a separator box (401) and thermal particles (402), and the thermal particles (402) are disposed inside the separator box (401).

6. The arc-extinguishing structure of a fuse element according to claim 5, characterized in that, The arc extinguishing assembly (4) further includes a torsion spring (403), an arc extinguishing rotating rod (404), and a movable electrode (405). The torsion spring (403) is provided inside the thermistor particle (402), and the arc extinguishing rotating rod (404) is connected to the side of the torsion spring (403). The movable electrode (405) is connected to the end of the arc extinguishing rotating rod (404).

7. The arc-extinguishing structure of a fuse element according to claim 1, characterized in that, The end of the lid (2) is fitted with a connecting piece (5), and the connecting piece (5) is T-shaped.

8. The arc-extinguishing structure of a fuse element according to claim 7, characterized in that, The surface of the connecting piece (5) is provided with a connecting hole (6), and the connecting piece (5) and the connecting hole (6) are an integrated structure.

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