CN110752128B

CN110752128B - Reusable fuse and using method thereof

Info

Publication number: CN110752128B
Application number: CN201911003873.7A
Authority: CN
Inventors: 汪洋
Original assignee: Ningbo Dehong Enterprise Development Co ltd; State Grid Shanghai Electric Power Co Ltd
Current assignee: Ningbo Dehong Enterprise Development Co.,Ltd.; State Grid Shanghai Electric Power Co Ltd
Priority date: 2018-11-20
Filing date: 2018-11-20
Publication date: 2021-09-10
Anticipated expiration: 2038-11-20
Also published as: CN110752128A; CN109559949A; CN109559949B

Abstract

The invention discloses a reusable fuse and a using method thereof, the fuse comprises a shell and a movable cavity, the movable cavity is arranged in the shell, electrorheological fluid is filled in the movable cavity, a sliding block is arranged in the movable cavity, an air bag is arranged below the sliding block, a linkage shaft is fixedly connected above the sliding block, the sliding block is connected with the inner wall of the movable cavity in a sliding manner, the linkage shaft penetrates through the movable cavity, one end of the linkage shaft, far away from the sliding block, is fixedly connected with a U-shaped shaft, a pressing shaft is fixedly connected onto the U-shaped shaft, the pressing shaft penetrates through the shell, connecting wires are symmetrically arranged on two sides of the shell, and connecting plates corresponding to the connecting wires are symmetrically arranged in the shell. The invention utilizes the inherent property of the electrorheological fluid, when the current is overloaded, the circuit is effectively disconnected by simple driving, and can be repeatedly used, and after the circuit is effectively disconnected, the circuit can be reused when the circuit is recovered to be normal.

Description

Reusable fuse and using method thereof

The invention relates to a divisional application of a reusable fuse, which is applied for 11, 20 and 2018 and has the application number of CN 201811380108.2.

Technical Field

The invention relates to the technical field of fuses, in particular to a reusable fuse and a using method thereof.

Background

The fuse is an electric appliance which fuses a melt by using heat generated by the fuse when the current exceeds a specified value and disconnects a circuit, the fuse melts the melt by using the heat generated by the fuse after the current exceeds the specified value for a period of time, so that the circuit is disconnected.

The fuse has the electric current to pass through all the time at the in-process of using to can generate heat, the live time is longer or current in the twinkling of an eye is great, in the time of unable restriction, the inside automatic fracture of fuse, open circuit, thereby protection circuit, but the circuit is once broken, then replaces new fuse, and the fuse can only disposable, can not used repeatedly.

Disclosure of Invention

The invention aims to solve the defects in the prior art, such as: the fuse can be damaged after long-term operation and cannot be used, and the reusable fuse is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a reusable fuse comprises a shell and a movable cavity, wherein the movable cavity is arranged in the shell, electrorheological fluid is filled in the movable cavity, a sliding block is arranged in the movable cavity, an air bag is arranged below the sliding block, a linkage shaft is fixedly connected above the sliding block, the sliding block is in sliding connection with the inner wall of the movable cavity, the linkage shaft penetrates through the movable cavity, one end, away from the sliding block, of the linkage shaft is fixedly connected with a U-shaped shaft, a pressing shaft is fixedly connected onto the U-shaped shaft, the pressing shaft penetrates through the shell, connecting wires are symmetrically arranged on two sides of the shell, connecting plates corresponding to the connecting wires are symmetrically arranged in the shell and are electrically connected with the connecting wires, sliding ends are fixedly connected onto two ends of the U-shaped shaft and are in sliding connection with the connecting plates, guide rods are symmetrically inserted into two sides of the movable cavity, one end of the guide rod is connected with a fixed end, and a lead is connected between the fixed end and the sliding end.

Preferably, the shell is symmetrically provided with a clamping mechanism corresponding to the sliding end, the clamping mechanism comprises a clamping shaft and a first spring, the first spring is sleeved on the clamping shaft, the clamping shaft is inserted on the shell, one end of the first spring is fixedly connected with the clamping shaft, the other end of the first spring is fixedly connected with the shell, and one side, close to the connecting plate, of the clamping shaft is an inclined plane.

Preferably, the lower side of the sliding end is connected with a second spring, and one end of the second spring, which is far away from the sliding end, is fixedly connected with the inner wall of the shell.

Preferably, the guide rod is sleeved with a sealing ring, and the sealing ring is clamped on the movable cavity.

Preferably, the outside of slider is provided with the isolation layer, the material of isolation layer is anticorrosive rubber.

Compared with the prior art, the invention has the beneficial effects that: by utilizing the inherent property of the electrorheological fluid, when the current flowing through the electrorheological fluid is overloaded, the circuit can be effectively disconnected by utilizing simple driving and can be repeatedly used, and after the circuit is effectively disconnected, the circuit can be reused when the circuit is recovered to be normal.

Drawings

FIG. 1 is a schematic structural diagram of a reusable fuse according to the present invention;

fig. 2 is a schematic structural diagram at a in fig. 1.

In the figure: the device comprises a shell 1, a pressing shaft 2, a U-shaped shaft 3, a linkage shaft 4, a sliding block 5, an air bag 6, a lead 7, a sliding end 8, a connecting wire 9, a second spring 10, a sealing ring 11, a guide rod 12, a fixed end 13, a connecting plate 14, electrorheological fluid 15, a movable cavity 16, a clamping shaft 17 and a first spring 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-2, a reusable fuse comprises a housing 1 and a movable cavity 16, the movable cavity 16 is installed in the housing 1, electrorheological fluid 15 is filled in the movable cavity 16, a slider 5 is installed in the movable cavity 16, an air bag 6 is arranged below the slider 5, a linkage shaft 4 is fixedly connected above the slider 5, an isolation layer is arranged outside the slider 5, the isolation layer is made of anti-corrosion rubber, the slider 5 is slidably connected with the inner wall of the movable cavity 16, the linkage shaft 4 penetrates through the movable cavity 16, a guide rod 12 is sleeved with a seal ring 11, the seal ring 11 is clamped on the movable cavity 16, one end of the linkage shaft 4 far away from the slider 5 is fixedly connected with a U-shaped shaft 3, a pressing shaft 2 is fixedly connected on the U-shaped shaft 3, the pressing shaft 2 penetrates through the housing 1, connecting wires 9 are symmetrically installed on two sides of the housing 1, connecting plates 14 corresponding to the connecting wires 9 are symmetrically installed in the housing 1, connecting plate 14 is connected with connecting wire 9 electricity, the equal fixedly connected with slip end 8 in both ends of U type axle 3, slip end 8 and connecting plate 14 sliding connection, the downside of slip end 8 is connected with second spring 10, the one end that slip end 8 was kept away from to second spring 10 and the inner wall fixed connection of shell 1, the bilateral symmetry of activity chamber 16 is inserted and is equipped with guide rod 12, the one end of guide rod 12 is connected with stiff end 13, be connected with wire 7 between stiff end 13 and the slip end 8, the last symmetry of shell 1 is installed the latch mechanism who corresponds with slip end 8, latch mechanism includes card axle 17 and first spring 18, first spring 18 cup joints on card axle 17, card axle 17 is inserted and is established on shell 1, the one end and the card axle 17 fixed connection of first spring 18, the other end and the shell 1 fixed connection of first spring 18, the one side that card axle 17 is close to connecting plate 14 is the inclined plane.

When the connecting wire 9 is communicated with the circuit, the connecting wire 9 is electrically connected with the connecting plate 14, the connecting plate 14 is also electrically connected with the sliding end 8, wherein the electrorheological fluid 15 in the movable cavity 16 is a conductor, a passage is formed between the two guide rods 12, and the passage is also formed between the two connecting wires 9.

When the current flowing in the shell 1 is too large, the current flowing through the electrorheological fluid 15 will be correspondingly increased, according to the inherent property of the electrorheological fluid 15, when the current is increased to the maximum critical value of the electrorheological fluid 15, the electrorheological fluid 15 will be converted from a liquid state to a solid state, wherein the volume of the electrorheological fluid 15 is in direct proportion to the size of an electric field, when the current is increased, the electrorheological fluid 15 will be increased, wherein the mass of the air bag 6 is always at the liquid level position, the air bag 6 and the sliding block 5 can be lifted in the conversion process of the electrorheological fluid 15, the sliding block 5 can drive the corresponding U-shaped shaft 3 and the pressing shaft 2 to be lifted in the lifting process, the U-shaped shaft 3 can drive the sliding end 8 to slide relative to the connecting plate 14 in the lifting process, and the circuit is in the state of a passage in the sliding process of the sliding end 8 on the connecting plate 14, when the electrorheological fluid 15 expands to the degree that the sliding end 8 is separated from the connecting plate 14, the circuit is disconnected, the sliding end 8 gradually moves along the inclined plane of the clamping shaft 17 in the sliding process, and after the sliding end 8 moves through the clamping shaft 17, the clamping shaft 17 blocks the position of the sliding end 8 under the elastic force action of the first spring 18 to avoid sliding downwards, so that the circuit is effectively disconnected when the current in the circuit is overloaded.

When the circuit returns to normal, because in the shell 1 in the state of opening a circuit, then the electric current that flows through electrorheological fluids 15 can reduce to lower critical value naturally, thereby resume to liquid state, because slide end 8 has been caught by card axle 17, slide end 8 can't contact with connecting plate 14, even electrorheological fluids 15 resumes to liquid state still can not make the circuit route, need to ensure that the user pulls the one end in card axle 17 outside after the circuit is normal, make slide end 8 slide in connecting plate 14 smoothly, press axle 2 downwards simultaneously, the circuit just can circulate, effectual protection circuit, and can repeat, can save the cost, and timely recovery circuit.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a repeatedly usable's fuse, includes shell (1) and activity chamber (16), install in shell (1) activity chamber (16), its characterized in that, activity chamber (16) intussuseption is filled with electrorheological fluids (15), install slider (5) in activity chamber (16), the below of slider (5) is provided with gasbag (6), the top fixedly connected with universal driving shaft (4) of slider (5), the inner wall sliding connection in slider (5) and activity chamber (16), universal driving shaft (4) pass activity chamber (16), the one end fixedly connected with U type axle (3) of slider (5) are kept away from in universal driving shaft (4), fixedly connected with presses on U type axle (3) presses axle (2), press axle (2) to pass shell (1), connecting wire (9) are installed to the bilateral symmetry of shell (1), connecting plates (14) corresponding to the connecting lines (9) are symmetrically installed in the shell (1), the connecting plates (14) are electrically connected with the connecting lines (9), sliding ends (8) are fixedly connected to two ends of the U-shaped shaft (3), the sliding ends (8) are slidably connected with the connecting plates (14), guide rods (12) are symmetrically inserted into two sides of the movable cavity (16), one end of each guide rod (12) is connected with a fixed end (13), and a lead (7) is connected between each fixed end (13) and each sliding end (8); the guide rod (12) is sleeved with a sealing ring (11), and the sealing ring (11) is clamped on the movable cavity (16); the outside of slider (5) is provided with the isolation layer, the material of isolation layer is anticorrosive rubber.

2. The reusable fuse according to claim 1, characterized in that a clamping mechanism corresponding to the sliding end (8) is symmetrically installed on the housing (1), the clamping mechanism comprises a clamping shaft (17) and a first spring (18), the first spring (18) is sleeved on the clamping shaft (17), the clamping shaft (17) is inserted on the housing (1), one end of the first spring (18) is fixedly connected with the clamping shaft (17), the other end of the first spring (18) is fixedly connected with the housing (1), and one side of the clamping shaft (17) close to the connecting plate (14) is an inclined plane.

3. A reusable fuse as claimed in claim 1, characterized in that a second spring (10) is attached to the underside of the sliding end (8), and the end of the second spring (10) remote from the sliding end (8) is fixedly connected to the inner wall of the housing (1).