CN211335595U

CN211335595U - Circuit protection device

Info

Publication number: CN211335595U
Application number: CN201922488312.2U
Authority: CN
Inventors: 赵跃; 智伯雄; 董天宇
Original assignee: Shenyang Xinghua Hwa Yick Rail Traffic Electrical Application Co ltd
Current assignee: AVIC optoelectronics Huayi (Shenyang) Electronic Technology Co.,Ltd.
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-25
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the technical field of rail transit, in particular to a circuit protection device, which comprises a protective box, a plurality of main fuses, copper pipe terminals, a busbar, an indicating fuse, a micro-switch, an insulator and a cable connector, wherein the protective box comprises a box body and a box cover which are fixedly connected through screws and nuts, the cable connector is installed on the side wall of the box body, the micro-switch and the insulator are arranged on the bottom plate of the box body, the busbar, the fuse, the indicating fuse and the copper pipe terminals are arranged in the box body and are not contacted with the inner wall of the box body, the busbar is fixedly installed above the insulator through a support plate and screws, one row of interfaces on the busbar, which are close to the center of the box body, are connected with the main fuses, the other interfaces are fixedly connected with a plurality of copper pipe terminals through screws, C-shaped clamps are also fixed on the, the interface of the indicating fuse is connected with the microswitch through a wire. The device has the functions of electrical monitoring and high-voltage overload protection.

Description

Circuit protection device

Technical Field

The utility model relates to a track traffic technical field specifically provides a circuit protection device.

Background

With the rapid development of the rail transit field, the requirements of the urban subway vehicle on the intellectualization and the safety of the urban subway vehicle are higher and higher, the high-voltage traction system is used as a power input part for vehicle operation, and the stability of electrical transmission of the high-voltage traction system plays a vital role in the normal operation of the vehicle.

The vehicle traction system has the electrical characteristics of high voltage and large current-carrying capacity, so that a device capable of monitoring electrical transmission in real time and providing early warning and circuit overload protection is urgently needed in the field of rail transit.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a circuit protection device, it has electrical monitoring function and high-voltage circuit overload protection function.

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

a circuit protection device comprises a protection box, a plurality of main fuses, copper pipe terminals, a bus bar, an indicating fuse, a microswitch, an insulator and a cable joint, wherein the protection box comprises a box body and a box cover which are fixedly connected through screws and nuts, the cable joint is installed on the side wall of the box body, the microswitch and the insulator are arranged on a bottom plate of the box body, the bus bar, the fuse, the indicating fuse and the copper pipe terminals are arranged in the box body and are not contacted with the inner wall of the box body, the bus bar is fixedly installed above the insulator through a supporting plate and screws, a row of interfaces close to the center of the box body on the bus bar are connected with the main fuses, the rest of interfaces are fixedly connected with a plurality of copper pipe terminals through screws, a C-shaped clamp is further fixed on the bus bar, the indicating fuse is fixed on the bus bar through the C, the interface of the indicating fuse is connected with the microswitch through a wire, and the indicating fuse is used for triggering the microswitch.

Preferably, the box body is made of high-quality carbon structural steel, the surface of the box body is subjected to electrostatic spraying, and an ethylene propylene diene monomer rubber strip is further arranged between the box body and the box cover.

Preferably, the number of the busbars is 2.

Preferably, the number of the copper pipe terminals is 8.

Preferably, the number of the main fuses is 4.

Preferably, the side wall of the box body is further provided with a signboard, and the bottom plate of the box body is further provided with an exhaust valve.

Use the utility model discloses a beneficial effect is: the box body of the utility model is made of high-quality carbon structural steel, the surface of the box body is subjected to electrostatic spraying, and an ethylene propylene diene monomer rubber strip is arranged between the box body and the box cover, so that the box body has the characteristics of high strength, high protection, shock vibration resistance, strong environmental resistance and the like; the fuse is electrically connected through a busbar, and the busbar is ensured to be electrically insulated from the box body shell through an insulator; copper pipe terminal passes through the screw to be connected with the busbar, instructs the fuse to pass through the clip to be connected with the busbar, instructs the fuse to pass through the screw to be connected with micro-gap switch, constitutes the electrical monitoring return circuit, realizes the electrical monitoring function, has high-voltage circuit overload protection function simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view from another angle of the present invention;

FIG. 3 is an assembled schematic view of the main fuse, the indicating fuse, the insulator and the bus bar;

FIG. 4 is a schematic diagram showing the construction of the fuse, the C-clip, and the bus bar;

the reference numerals include:

1-a protective box; 11-box body, 111-signboard, 112-exhaust valve, 12-box cover, 2-copper pipe terminal; 3-a busbar; 4-indicating fuses; 5-C type clips; 6-main fuse; 7-cable joint; 8-a microswitch; 9-insulator, 10-support plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-4, a circuit protection device comprises a protection box 1, a plurality of main fuses 6, copper pipe terminals 2, a busbar 3, an indicating fuse 4, a micro switch 8, an insulator 9 and a cable connector 7, wherein the protection box 1 comprises a box body 11 and a box cover 12, the box body 11 and the box cover 12 are fixedly connected through screws and nuts, the cable connector 7 is installed on the side wall of the box body 11, the micro switch 8 and the insulator 9 are arranged on the bottom plate of the box body 11, the busbar 3, the main fuses 6, the indicating fuse 4 and the copper pipe terminals 2 are arranged in the box body 11 and are not contacted with the inner wall of the box body 11, the copper pipe terminals 2 are used for being connected with a lead of a high-voltage circuit, the busbar 3 is fixedly installed above the insulator 9 through a supporting plate 10 and screws, a row of interfaces close to the center of the box body on the busbar 3 is connected with the fuses, still be fixed with C type clamping 5 on the busbar 3, indicate fuse 4 to pass through C type clamping 5 to be fixed on busbar 3, indicate fuse 4's interface to pass through the wire and be connected with micro-gap switch 8, indicate fuse 4 to be used for triggering micro-gap switch 8. During the use, when being connected to the utility model discloses circuit protection device's equipment current is transshipped, and four main fuses 6 can fuse, and at this moment instruction fuse 4 can trigger micro-gap switch 8, and circuit through micro-gap switch 8 changes, provides a feedback signal for the system that uses this equipment to the realization is to the control of circuit.

The box body 11 is made of high-quality carbon structural steel, the surface of the box body is subjected to electrostatic spraying, and an ethylene propylene diene monomer rubber strip is arranged between the box body 11 and the box cover 12.

The number of the bus bars 3 is 2, and the bus bars are respectively arranged at the left end and the right end of the main fuse 6.

The number of the copper pipe terminals 2 is 8.

The number of the main fuses 6 is 4.

The side wall of the box body 11 is also provided with a signboard 111, which is convenient for inquiring and maintaining the internal components of the product.

Still be provided with discharge valve 112 on the bottom plate of box 11, make the utility model discloses the heat dispersion of the inside components and parts of circuit protection device is good.

The above description is only a preferred embodiment of the present invention, and many changes can be made in the detailed description and the application scope according to the idea of the present invention for those skilled in the art, which all belong to the protection scope of the present invention as long as the changes do not depart from the concept of the present invention.

Claims

1. A circuit protection device, characterized by: including protective housing (1), a plurality of main fuse (6), copper pipe terminal (2), busbar (3), instruction fuse (4), micro-gap switch (8), insulator (9) and cable joint (7), protective housing (1) includes box (11) and case lid (12), and box (11) and case lid (12) pass through screw nut fixed connection, cable joint (7) are installed on the lateral wall of box (11), micro-gap switch (8) and insulator (9) set up on the bottom plate of box (11), busbar (3), main fuse (6), instruction fuse (4) and copper pipe terminal (2) set up in box (11) and do not contact with the inner wall of box (11), busbar (3) pass through backup pad (10) and screw fixed mounting in the top of insulator (9), the last row of interface that is close to the box center of busbar (3) is connected with the fuse, All the other interfaces pass through a plurality of copper pipe terminals (2) of screw fixedly connected with, still be fixed with C type clamping (5) on busbar (3), indicate fuse (4) to fix on busbar (3) through C type clamping (5), the interface of instructing fuse (4) passes through wire and micro-gap switch (8), it is used for triggering micro-gap switch (8) to instruct fuse (4).

2. The circuit protection device of claim 1, wherein: the box body (11) is made of high-quality carbon structural steel, the surface of the box body is subjected to electrostatic spraying, and an ethylene propylene diene monomer rubber strip is arranged between the box body (11) and the box cover (12).

3. The circuit protection device of claim 1, wherein: the number of the bus bars (3) is 2.

4. The circuit protection device of claim 1, wherein: the number of the copper pipe terminals (2) is 8.

5. The circuit protection device of claim 1, wherein: the number of the main fuses (6) is 4.

6. The circuit protection device of claim 1, wherein: the side wall of the box body (11) is also provided with a signboard (111), and the bottom plate of the box body (11) is also provided with an exhaust valve (112).