CN209912825U

CN209912825U - Circuit overcurrent protection device

Info

Publication number: CN209912825U
Application number: CN201920602266.1U
Authority: CN
Inventors: 余瑜; 秦筠婷
Original assignee: Hubei University of Technology
Current assignee: Hubei University of Technology
Priority date: 2018-12-17
Filing date: 2019-04-29
Publication date: 2020-01-07
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a circuit overcurrent protection device, comprising a main body, the gas cavity has been seted up at the middle part of main part, and the inside of gas cavity is equipped with inert gas, the main part is equipped with the coil in the inside of gas cavity, first cavity has been seted up at the top of main part, first through-hole has been seted up to the main part between first cavity and gas cavity, the main part is equipped with the bracing piece in first through-hole department, the bracing piece extends to the inside of gas cavity in first through-hole department, the one end fixedly connected with disc of bracing piece, one side fixedly connected with sealing washer of disc, the bracing piece extends to the inside of first cavity in first through-hole department, and the main part is equipped with first insulation piece in the inside of first cavity, and the one end and the bracing piece fixed connection of first insulation piece. Compared with the prior art, the utility model discloses the device overall structure is simple, and can repetitious usage, and it is comparatively convenient to maintain, and the device has the time delay nature to cause the device to judge by mistake, and the tripping operation opens circuit.

Description

Circuit overcurrent protection device

Technical Field

The utility model relates to an electrical device technical field especially relates to a circuit overcurrent protection device.

Background

Along with the improvement of the level of human industry, the application of electric power marks that people enter a new era, electric power resources not only bring help to people, but also bring harm to people, misoperation of electricity easily brings electric shock, fire hazard and other hidden dangers to people, the most common line overcurrent is very dangerous, the fire hazard can be caused when the treatment is not good, the overcurrent refers to the current exceeding rated current and comprises overload current and short-circuit current, the overcurrent before the circuit is damaged in insulation is called overload current, the overcurrent after the circuit is damaged in insulation is called short-circuit current, the old fuse needs to be connected with a new fuse again after being fused for use, the existing overcurrent protection device is complex in structure, inconvenient to maintain and free of time delay structure, and therefore the overcurrent protection device is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving prior art overcurrent protection device and all comparatively complicated, the maintenance is inconvenient, and time delay structure is less, easily causes the device misjudgement, and the shortcoming that the tripping operation was opened circuit, and a circuit overcurrent protection device who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a circuit overcurrent protection device comprises a main body, wherein a gas cavity is formed in the middle of the main body, inert gas is arranged in the gas cavity, a coil is arranged in the gas cavity of the main body, a first cavity is formed in the top of the main body, a first through hole is formed in the main body between the first cavity and the gas cavity, a supporting rod is arranged at the first through hole of the main body and extends into the gas cavity at the first through hole, a disc is fixedly connected to one end of the supporting rod, a sealing ring is fixedly connected to one side of the disc, the supporting rod extends into the first cavity at the first through hole, a first insulating block is arranged in the first cavity of the main body, one end of the first insulating block is fixedly connected with the supporting rod, a conductor is fixedly connected to one side of the first insulating block, and a second insulating block is fixedly connected to one side of the conductor, the top of main part has seted up the second cavity, the main part is equipped with first spring in the inside of second cavity.

Furthermore, the one end fixedly connected with slide bar of first spring, the second through-hole has been seted up to the main part between first cavity and second cavity, the slide bar extends to the inside of first cavity in second through-hole department, the one end and the second collets fixed connection of slide bar.

Furthermore, the main body is provided with a groove in the inner wall of the bottom end of the second cavity, the main body is provided with a fixture block in the groove, the fixture block extends into the second cavity in the groove, the main body is provided with a positioning groove in the inner wall of the bottom end of the groove, and the main body is provided with a second spring in the positioning groove.

Furthermore, the top end fixedly connected with locating lever of second spring, the locating lever extends to inside the recess at the positioning groove department of main part, the top and the fixture block fixed connection of locating lever.

Further, circular through-hole has been seted up at one side inner wall department of recess to the main part, the main part is equipped with the slider in circular through-hole department, and the slider extends to the outside of main part at circular through-hole department, the slider extends to the inside of recess at circular through-hole department.

Further, the top of main part is equipped with input port, the bottom of main part is equipped with output port, the main part is at the top of second cavity and the equal fixedly connected with contact gleitbretter of bottom inner wall department, two the contact gleitbretter respectively with the input port with be connected with the wire between the coil, be connected with the wire between output port and the coil.

The utility model has the advantages that:

1. through setting up coil, sealing washer, bracing piece and conductor, when circuit electric current was too big, the coil can generate heat, with gas heating, gas expansion promotes the conductor, and the disconnect switch, the circuit is cut off, the device overall structure is simple, and can repetitious usage, and it is comparatively convenient to maintain.

2. Through setting up gas cavity, bracing piece and conductor, when circuit current was too big, the coil can generate heat, with gas heating, gas expansion needs certain time, prevents because of the increase in the twinkling of an eye of circuit current, causes the device misjudgement, and the tripping operation is broken circuit.

Compared with the prior art, the utility model discloses the device overall structure is simple, and can repetitious usage, and it is comparatively convenient to maintain, and the device has the time delay nature to cause the device to judge by mistake, and the tripping operation opens circuit.

Drawings

Fig. 1 is a schematic front view of a circuit overcurrent protection device according to the present invention;

fig. 2 is a schematic side view of the circuit overcurrent protection device according to the present invention;

fig. 3 is an enlarged schematic structural diagram of a part a of the circuit overcurrent protection device provided by the utility model.

In the figure: the device comprises a main body 1, a sealing ring 2, a disc 3, a support rod 4, an input port 5, a gas cavity 6, a first insulating block 7, a conductor 8, a second insulating block 9, a sliding rod 10, a first spring 11, a clamping block 12, a sliding block 13, a positioning rod 14, a second spring 15, a coil 16 and an output port 17.

Detailed Description

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

Referring to fig. 1-3, a circuit overcurrent protection device comprises a main body 1, a gas cavity 6 is formed in the middle of the main body 1, inert gas is arranged inside the gas cavity 6, a coil 16 is arranged inside the gas cavity 6 of the main body 1, a first cavity is formed in the top of the main body 1, a first through hole is formed between the first cavity and the gas cavity 6 of the main body 1, a support rod 4 is arranged at the first through hole of the main body 1, the support rod 4 extends into the gas cavity 6 at the first through hole, a disc 3 is fixedly connected to one end of the support rod 4, a seal ring 2 is fixedly connected to one side of the disc 3, the support rod 4 extends into the first cavity at the first through hole, a first insulation block 7 is arranged inside the first cavity of the main body 1, one end of the first insulation block 7 is fixedly connected with the support rod 4, a conductor 8 is fixedly connected to one side of the first insulation block 7, a second insulating block 9 is fixedly connected to one side of the conductor 8, a second cavity is formed in the top of the main body 1, a first spring 11 is arranged in the second cavity of the main body 1, one end of the first spring 11 is fixedly connected with a slide rod 10, a second through hole is formed in the main body 1 between the first cavity and the second cavity, the slide rod 10 extends into the first cavity at the second through hole, one end of the slide rod 10 is fixedly connected with the second insulating block, a groove is formed in the bottom end inner wall of the second cavity of the main body 1, a clamping block 12 is arranged at the groove of the main body 1, the clamping block 12 extends into the second cavity at the groove, a positioning groove is formed in the bottom end inner wall of the groove of the main body 1, a second spring 15 is arranged in the positioning groove of the main body 1, a positioning rod 14 is fixedly connected to the top end of the second spring 15, and the positioning rod 14 extends into the groove at, the top and the fixture block 12 fixed connection of locating lever 14, circular through-hole has been seted up in one side inner wall department of recess to main part 1, main part 1 is equipped with slider 13 in circular through-hole department, and slider 13 extends to the outside of main part 1 in circular through-hole department, slider 13 extends to the inside of recess in circular through-hole department, the top of main part 1 is equipped with input port 5, the bottom of main part 1 is equipped with output port 17, main part 1 is on the top of second cavity and the equal fixedly connected with contact gleitbretter of bottom inner wall department, two contact gleitbretters respectively with input port 5 and coil 16 between be connected with the wire, be connected with the wire between output port 17.

The working principle is as follows: the device is connected with a wire through an input port 5 and an output port 17, when the circuit current is overloaded, a coil 16 generates heat, inert gas in a gas cavity 6 expands to push a disc 3, the disc 3 drives a support rod 4 to move, the support rod 4 drives a first insulating block 7 to move, a conductor 8 is driven to move, a second insulating body 9 is driven to move, a slide rod 10 is driven to move, a first spring 11 is compressed, when the slide rod 10 is in contact with a fixture block 12, the fixture block 12 is pushed into a groove by the slide rod 10, the fixture block 12 pushes a positioning rod 14, a second spring 15 is compressed, when one end of the slide rod 10 is far away from the fixture block 12, the second spring 15 pushes the positioning rod 14, the positioning rod 14 pushes the fixture block 12, the fixture block 12 moves out of the groove, enters a second cavity of a main body 1, after a period of gas expansion, at the moment, the conductor 8, when the gas returns to the original state, the clamping block 12 cannot move, the conductor 8 cannot move, the circuit cannot be closed, and when the circuit is desired to be closed, the sliding block 13 is pressed, the sliding block 13 pushes the clamping block 12 to move, the clamping block 12 is pushed into the groove by the sliding rod 10, the clamping block 12 pushes the positioning rod 14, the second spring 15 is compressed, the first spring 11 pushes the sliding rod 10, the conductor 8 returns to the original position, and the circuit is closed.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A circuit overcurrent protection device comprises a main body (1) and is characterized in that a gas cavity (6) is formed in the middle of the main body (1), inert gas is arranged in the gas cavity (6), a coil (16) is arranged in the main body (1) in the gas cavity (6), a first cavity is formed in the top of the main body (1), a first through hole is formed in the main body (1) between the first cavity and the gas cavity (6), a supporting rod (4) is arranged at the first through hole of the main body (1), the supporting rod (4) extends to the inside of the gas cavity (6) at the first through hole, a disc (3) is arranged at one end of the supporting rod (4), a sealing ring (2) is arranged on one side of the disc (3), the supporting rod (4) extends to the inside of the first cavity at the first through hole, a first insulating block (7) is arranged in the first cavity of the main body (1), and the one end and bracing piece (4) fixed connection of first insulating block (7), one side of first insulating block (7) is equipped with conductor (8), one side of conductor (8) is equipped with second insulating block (9), the second cavity has been seted up at the top of main part (1), main part (1) is equipped with first spring (11) in the inside of second cavity.

2. The circuit overcurrent protection device as set forth in claim 1, wherein a sliding rod (10) is disposed at one end of the first spring (11), a second through hole is disposed between the first cavity and the second cavity in the main body (1), the sliding rod (10) extends into the first cavity at the second through hole, and one end of the sliding rod (10) is fixedly connected to the second insulating block.

3. The circuit overcurrent protection device as set forth in claim 1, wherein the main body (1) is provided with a groove at the bottom inner wall of the second cavity, the main body (1) is provided with a clamping block (12) at the groove, the clamping block (12) extends to the inside of the second cavity at the groove, the main body (1) is provided with a positioning groove at the bottom inner wall of the groove, and the main body (1) is provided with a second spring (15) at the inside of the positioning groove.

4. The overcurrent protection device as set forth in claim 3, wherein a positioning rod (14) is disposed at the top end of the second spring (15), the positioning rod (14) extends into the positioning groove of the main body (1), and the top end of the positioning rod (14) is fixedly connected to the latch (12).

5. A circuit overcurrent protection device according to claim 3, characterized in that the main body (1) is provided with a circular through hole at one side inner wall of the groove, the main body (1) is provided with a slide block (13) at the circular through hole, the slide block (13) extends to the outside of the main body (1) at the circular through hole, and the slide block (13) extends to the inside of the groove at the circular through hole.

6. The circuit overcurrent protection device according to claim 1, wherein an input port (5) is arranged at the top end of the main body (1), an output port (17) is arranged at the bottom end of the main body (1), contact sliding pieces are arranged on the inner walls of the top end and the bottom end of the main body (1) in the second cavity, a conducting wire is connected between each contact sliding piece and the input port (5) and the coil (16), and a conducting wire is connected between each output port (17) and the coil (16).