CN103456579A - Signal output device used for oil-immersed type fuse protector - Google Patents

Abstract

The invention discloses a signal output device for an oil-immersed fuse, which comprises a switch cover, a micro switch and a connection terminal. The switch cover includes a cover plate, an outer ring connected to the front end face of the cover plate, and a switch slot connected to the front end face of the cover plate and located in the outer ring. The cable perforation, the switch cover is installed in the rear port of the handle with the switch slot forward; the micro switch is installed in the switch slot of the switch cover with its contact handle forward; The connecting terminal is arranged on the outside of the base and is connected with the three contacts of the micro switch through a three-core sheathed wire passing through the cable hole on the switch cover. The signal output device of the present invention can provide signal output after the fuse operates, prevents the circuit from running without a phase, and reduces safety risks.

Description

A signal output device for oil-immersed fuse

technical field

The invention relates to a signal output device for an oil-immersed fuse.

Background technique

At present, oil-immersed fuses are mainly used for the protection of wind power generation devices, but because they have no signal output function, and the monitoring station of wind power generation devices is far away from the wind field, they cannot get feedback in time after the fuse operates, resulting in circuit failure. The open-phase operation of wind turbines will cause safety risks, and it will also cause difficulties in the maintenance of wind power generation devices. Nowadays, the society has higher and higher requirements for intelligence, so it is particularly important to develop a signal output device suitable for oil-immersed fuses, which is of great help to the maintenance of wind power generation devices, the reduction of safety risks and the determination of faults .

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a signal output device for an oil-immersed fuse, which can provide a signal output after the fuse operates, prevent the circuit from running without phase, and reduce safety risks.

The object of the present invention is achieved as follows: a signal output device for an oil-immersed fuse, the fuse includes a cylindrical base with a one-way opening and fuse-carrying parts sequentially arranged in the base from the opening direction of the base and a fuse; the fuse-carrying element includes a handle, a rear coupler connected to the front end of the handle and fixed on the rear end of the fuse, and a front coupler fixed on the front end of the fuse; wherein ,

The signal output device includes a switch cover, a micro switch and a terminal block;

The switch cover includes a cover plate, an outer ring connected to the front end face of the cover plate, and a switch slot connected to the front end face of the cover plate and located in the outer ring. The cable is perforated, and the switch cover is installed on the rear port of the handle with the switch slot facing forward;

The micro switch is installed in the switch slot of the switch cover with its contact handle facing forward;

The connecting terminal is arranged on the outside of the base and is connected to the three contacts of the micro switch through a three-core sheathed wire passing through the cable hole on the switch cover.

The above-mentioned signal output device for an oil-immersed fuse is characterized in that the micro switch is fixed and sealed by epoxy glue after being installed in the switch groove of the switch cover.

The above-mentioned signal output device for an oil-immersed fuse is characterized in that the outer ring of the switch cover is provided with an external thread that can be threadedly connected with the internal thread provided on the rear port of the handle.

The above-mentioned signal output device for an oil-immersed fuse is characterized in that a sealing ring is placed on the outer ring of the switch cover, so that the switch cover is sealed at the rear port of the handle.

Any one of the above signal output devices for oil-immersed fuses is characterized in that the switch cover is made of unsaturated polyester resin.

The above-mentioned signal output device for an oil-immersed fuse is characterized in that the sealing ring is made of high-temperature-resistant and aging-resistant rubber material.

The signal output device for the oil-immersed fuse of the present invention can provide signal output after the fuse operates, and can accurately, effectively, quickly and intuitively observe the fusing condition inside the fuse, so as to facilitate remote monitoring by the personnel of the wind power generation monitoring station , to know where the fault occurs in time, to ensure that the circuit will not cause safety risks due to lack of phase operation, and the device is still fully sealed after being installed on the fuse, which is of great help to the maintenance of wind power.

Description of drawings

Fig. 1 is a schematic structural view of a signal output device for an oil-immersed fuse of the present invention;

Fig. 2 is the A direction view in Fig. 1;

Fig. 3 is a schematic diagram of the installation of the signal output device for the oil-immersed fuse of the present invention.

Detailed ways

In order to better understand the technical solutions of the present invention, specific embodiments will be described in detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1 and Fig. 2, the signal output device for the oil-immersed fuse of the present invention is installed on the fuse-carrying part of the fuse, and the signal output device includes a switch cover 41, a micro switch 42 and a connection terminal 43 ;in:

The switch cover 41 includes a cover plate 411, an outer ring 412 connected to the front end face of the cover plate 411 and a switch groove 413 connected to the front end face of the cover plate 411 and located in the outer ring 412. The cover plate 411 of the switch cover 41 Open a cable perforation connected with the switch slot 413; the material of the switch cover 41 is unsaturated resin polyester;

The micro switch 42 is installed in the switch groove 413 of the switch cover 41 with its contact handle forward and is fixed and sealed by epoxy glue;

The connecting terminal 43 is arranged on the outside of the switch cover 41 and is connected with the three contacts of the micro switch 42 through a three-core sheathed wire 44 passing through a cable hole on the switch cover 41 .

Referring to Fig. 3 again, the oil-immersed fuse includes a cylindrical base 1 with a one-way opening and a fuse carrier and a fuse part arranged in the base 1 in sequence from the opening direction of the base 1; the fuse carrier includes a handle 2, a The front end of the handle 2 is connected to a rear coupler fixed on the rear end of the fuse, a front coupler fixed on the front end of the fuse, and a linkage device 3 movably connected to the handle 2 . The handle 2 includes a handle 21 and a connecting rod 22. The center of the handle 21 is provided with an axial through hole, and the rear port of the axial through hole is provided with an internal thread.

The outer ring 412 of the switch cover 41 of the signal output device of the present invention is provided with external threads, so that the switch cover 41 can be threadedly connected to the rear port of the handle 21 .

In order to suitably install the signal output device of the present invention in an oil-immersed fuse, a sealing ring 45 is placed on the outer ring 412 of the switch cover 41 so that the switch cover 41 is sealed at the rear port of the handle 21 . The sealing ring 45 is an O-ring and is made of high temperature resistant and aging resistant rubber material.

The contact handle of the microswitch 22 in the signal output device of the present invention realizes the signal output function after being in contact with the screw head of the limit screw 30 in the axial through hole of the handle 2, the limit screw 30 The screw is connected to the linkage device 3; when the circuit is overloaded or short-circuited, the fuse in the fuse is blown, so that the impactor installed in the fuse loses its tension and pops up to push the linkage device 3 to move backward, so that the limit screw 30 touches the contact handle of the micro switch 22 to open the contact of the micro switch 22 to realize signal output. After the oil-immersed fuse adopts the signal output device of the present invention, it can accurately, effectively, quickly and intuitively observe the internal fusing status, so that the personnel of the wind power monitoring station can monitor remotely, know where the fault occurs in time, and ensure that the circuit will not There are safety risks due to lack of phase operation, and the device is still fully sealed after being installed on the fuse, which is of great help to the maintenance of wind power.

The above embodiments are only for the purpose of illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent The technical solutions should also belong to the category of the present invention and should be defined by each claim.

Claims (6)

1. A signal output device for an oil-immersed fuse comprises a cylindrical base with a one-way opening, and a fuse carrier and a fuse link which are sequentially arranged in the base from the opening direction of the base; the fuse carrier comprises a handle, a rear coupler connected with the front end part of the handle and fixedly arranged at the rear end of the fuse link and a front coupler fixedly arranged at the front end of the fuse link; it is characterized in that the preparation method is characterized in that,

the signal output device comprises a switch cover, a microswitch and a wiring terminal;

the switch cover comprises a cover plate, an outer ring connected to the front end face of the cover plate and a switch groove connected to the front end face of the cover plate and located in the outer ring, a cable through hole communicated with the switch groove is formed in the cover plate of the switch cover, and the switch cover is installed at the rear port of the handle in a mode that the switch groove faces forwards;

the micro switch is arranged in a switch groove of the switch cover in a mode that a contact point operating handle of the micro switch is forward;

the wiring terminal is arranged outside the base and is connected with three contacts of the microswitch through a three-core sheath wire which penetrates through a cable perforation on the switch cover.

2. The signal output device for the oil-filled fuse according to claim 1, wherein the micro switch is fixed and sealed by epoxy glue after being installed in the switch slot of the switch cover.

3. The signal output device for the oil-filled fuse according to claim 1 or 2, wherein an outer thread capable of being in threaded connection with an inner thread arranged on the rear port of the handle is arranged on an outer ring of the switch cover.

4. The signal output device for the oil-filled fuse according to claim 3, wherein a sealing ring is further sleeved on the outer ring of the switch cover, so that the switch cover is sealed at the rear port of the handle.

5. The signal output device for the oil-filled fuse according to any one of claims 1 to 4, wherein the material of the switch cover is unsaturated polyester resin.

6. The signal output device for the oil-filled fuse according to claim 4, wherein the sealing ring is made of a high-temperature-resistant and aging-resistant rubber material.

Images