CN215418082U

CN215418082U - Drop-out fuse with protection casing

Info

Publication number: CN215418082U
Application number: CN202121094282.8U
Authority: CN
Inventors: 胡攀
Original assignee: Jiangxi Changtai Electric Co Ltd
Current assignee: Jiangxi Changtai Electric Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-01-04
Anticipated expiration: 2031-05-21

Abstract

The utility model relates to a drop-out fuse with a protective cover, which belongs to the technical field of fuses, and comprises a fuse body and a cuboid protective cover positioned on the periphery of the fuse body, wherein the protective cover comprises a fixed cover and a movable cover, the movable cover is a right-angle plate, one right-angle side of the movable cover is hinged with one end of the bottom surface of the fixed cover, the other right-angle side of the movable cover is movably connected with one end of the upper surface of the fixed cover, a clamp connecting piece is arranged in the middle of the outer wall of an insulator, a support end of the clamp connecting piece extends to the outer surface of the fixed cover and is provided with a mounting frame, the tail end of the clamp connecting piece is provided with an inner disc, the starting end of the mounting frame is provided with an outer disc, and the outer disc and the inner disc are fixedly connected through a plurality of groups of bolts; compared with the prior art, the protective cover is arranged on the periphery of the fuse protector, so that the drop-out fuse protector is convenient to be blown by wind and rain, the service life of the fuse protector body can be effectively prolonged, and the normal use of the drop-out fuse protector is not influenced.

Description

Drop-out fuse with protection casing

Technical Field

The utility model belongs to the technical field of fuses, and particularly relates to a drop-out fuse with a protective cover.

Background

The drop-out fuse is a short-circuit protection switch most commonly used for 10kV distribution line branch lines and distribution transformers, and has the characteristics of economy, convenience in operation, strong adaptability to outdoor environment and the like. The moving contacts at the two ends of the fuse tube are tied by means of the fuse wire, after the upper moving contact is pushed into the protruding part, the upper fixed contact made of the phosphor copper sheets and the like props against the upper moving contact, and therefore the fuse tube is firmly clamped in the protrusion. When the short-circuit current is fused through the fuse wire, an electric arc is generated, a steel paper tube lined in the fuse tube generates a large amount of gas under the action of the electric arc, the gas is sealed due to the upper end of the fuse tube, and the gas is sprayed out to the lower end to blow out the electric arc. As the fuse wire is fused, the upper and lower moving contacts of the fuse tube lose the fastening force of the fuse wire, and the fuse tube falls rapidly under the action of the gravity of the fuse tube and the spring pieces of the upper and lower static contacts, so that a circuit is disconnected, and a fault section line or fault equipment is cut off. The existing drop-out fuse is directly exposed outside, and the service life of the drop-out fuse is short due to wind and rain, so that the drop-out fuse needs to be frequently detected and maintained, and is troublesome to use. Accordingly, a drop-out fuse with a protective cover is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a drop-out fuse with a protective cover to solve the problems in the background technology.

The utility model realizes the purpose through the following technical scheme:

a drop-out fuse with a protective cover comprises a fuse body, wherein the fuse body comprises an insulator, an upper support, a lower support and a fusion tube, the upper support and the lower support are respectively positioned at the upper end and the lower end of the insulator, the lower end of the fusion tube is connected with a conductive connecting piece of the lower support through a pin shaft, the upper end of the fusion tube is inserted into the protruding part of the conductive connecting piece of the upper support, the drop-out fuse further comprises a cuboid protective cover positioned at the periphery of the fuse body, the protective cover comprises a fixed cover and a movable cover, the movable cover is a straight-angle plate, a straight-angle edge of the movable cover is hinged with one end of the bottom surface of the fixed cover, the other straight-angle edge of the movable cover is movably connected with one end of the upper surface of the fixed cover, a clamp connecting piece is arranged in the middle of the outer wall of the insulator, a support end of the clamp connecting piece extends to the outer surface of the fixed cover to form a mounting frame, and an inner disc is arranged at the tail end of the clamp connecting piece, and the inner disc is positioned on the inner wall of the fixed cover, the starting end of the mounting frame is provided with an outer disc, the outer disc is positioned on the outer wall of the fixed cover, and the outer disc and the inner disc are fixedly connected through a plurality of groups of bolts.

As a further optimization scheme of the utility model, one end of the fixed cover, which is close to the mounting rack, is provided with a wire inlet and a wire outlet, the wire inlet is positioned above the level of the upper bracket, and the wire outlet is positioned below the level of the lower bracket.

As a further optimized scheme of the utility model, the outer side wall of the non-hinged end of the movable cover close to the top end is provided with a pull ring.

As a further optimization scheme of the utility model, the clamping plate is arranged on the inner side wall of the non-hinged end of the movable cover close to the top end, and the clamping groove clamped with the clamping plate is arranged at one end of the upper surface of the fixed cover.

As a further optimization scheme of the utility model, the non-hinged end of the movable cover close to the inner side wall and the outer side wall of the top end are respectively provided with a warning device, the warning devices are positioned below the clamping plate and comprise warning lamps and solar panels, switches of the warning lamps are spring switches, and the spring switches are positioned on the lower end face of the clamping plate.

As a further optimization scheme of the utility model, the ends of the upper support and the lower support, which are opposite to the fusion tubes, extend to the inner wall of the fixed cover, and vertical bending plates are arranged at the extending ends of the upper support and the lower support and are connected with the fixed cover body through two groups of bolts.

As a further optimized scheme of the utility model, the bending plate of the upper support is downward, the bending plate of the lower support is upward, the outer surface of the bolt which is positioned outside the fixed cover and used for connecting the bending plate and the fixed cover is provided with a protective cover, the protective cover comprises a shell and a flip cover, and one end of the flip cover is hinged at the upper end of the shell.

The utility model has the beneficial effects that: the protective cover is arranged on the periphery of the fuse, so that the drop-out fuse is convenient to be blown by wind and rain, the service life of the fuse body can be effectively prolonged, and the normal installation and use of the drop-out fuse are not influenced; after the fusion tube is fused, the fusion tube falls off, the movable cover is jacked open, and maintenance personnel can find fault points in time.

Drawings

Fig. 1 is a schematic view of a closed configuration of a drop out fuse of the present invention with a protective cover;

fig. 2 is a schematic diagram of an open configuration of the drop out fuse of the present invention with a protective cover;

FIG. 3 is an enlarged schematic view of FIG. 1 at A;

fig. 4 is an enlarged schematic view of fig. 1 at B.

In the figure: 1. an insulator; 2. an upper bracket; 3. a lower bracket; 4. a fusion tube; 5. a clamp connection member; 6. a mounting frame; 7. an inner circular disc; 8. an outer disc; 9. a fixed cover; 10. a wire inlet; 11. an outlet; 12. a movable cover; 13. clamping a plate; 14. a card slot; 15. a pull ring; 16. a spring-type switch; 17. a solar panel; 18. a warning light; 19. a bending plate; 20. a housing; 21. a flip cover.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1-2, the drop-out fuse with a protective cover of the present embodiment includes a fuse body, the fuse body includes an insulator 1, an upper bracket 2, a lower bracket 3, and a fuse tube 4, the upper bracket 2 and the lower bracket 3 are respectively located at the upper end and the lower end of the insulator 1, the lower end of the fuse tube 4 is connected to the conductive connecting member of the lower bracket 3 through a pin, the upper end of the fuse tube 4 is inserted into the conductive connecting member protruding portion of the upper bracket 2, after the fuse tube 4 is fused due to a fault, the upper end of the fuse tube 4 falls off from the conductive connecting member protruding portion of the upper bracket 2, and due to the gravity and the connection relationship between the pin at the bottom end of the fuse tube 4 and the conductive connecting member of the lower bracket 3, the fuse tube 4 tilts backwards using the pin as a fulcrum.

As shown in fig. 1-2, the drop-out fuse with a protective cover of this embodiment further includes a rectangular protective cover located at the periphery of the fuse body, the protective cover is made of a polymer insulating material, a ceramic layer is disposed on the inner wall of the protective cover for fire protection, the protective cover includes a fixed cover 9 and a movable cover 12, the fixed cover 9 and the movable cover 12 form a rectangular parallelepiped, the movable cover 12 is a right-angle plate, a right-angle side of the movable cover 12 is hinged to one end of the bottom surface of the fixed cover 9, so that the movable cover 12 can rotate at the hinged position, the other right-angle side of the movable cover 12 is movably connected to one end of the upper surface of the fixed cover 9, so as not to hinder normal installation and use of the drop-out fuse, when the fuse tube 4 is fused and dropped out, the movable cover 12 can be pushed open, a clamp connector 5 is disposed in the middle of the outer wall of the insulator 1, and a mounting bracket end of the clamp connector 5 extends to the outer surface of the fixed cover 9 and is provided with a mounting bracket 6, the end of clamp connecting piece 5 is equipped with interior disc 7, and interior disc 7 is located fixed cover 9 inner walls, and the initiating terminal of mounting bracket 6 is equipped with outer disc 8, and outer disc 8 is located fixed cover 9 outer walls, and outer disc 8 and interior disc 7 are through a plurality of groups bolt fixed connection, make the fuse can be fine fixed with the protection casing, and again can be fine fixed with the fixed point, make protection that the protection casing can be stable peripheral at drop out fuse, resist the wind-force invasion of eminence.

Fixed cover 9 is equipped with inlet 10 and outlet 11 near the one end of mounting bracket 6, inside in order to prevent that a large amount of rainwater from inlet 10 and outlet 11 entering into the protection casing, the inlet wire needs to adopt the wire of taking the stopper with being qualified for the next round of competitions, stopper diameter and inlet 10 and outlet 11 phase-matches, the well jackshaft line position department of stopper sets up porosely, the wire wears on the hole, after the wire connects, plug in inlet 10 and outlet 11 with the stopper, inlet 10 is located 2 level tops of upper bracket, outlet 11 is located 3 level below of lower carriage, do not influence the wiring.

Be equipped with pull ring 15 on the lateral wall that the non-hinged end of movable cover 12 is close to the top, the effect is the same with the ring on the fusion tube 4, when normally overhauing, adopt the order gram stick to drag pull ring 15, open movable cover 12, the non-hinged end of movable cover 12 is close to and is equipped with cardboard 13 on the inside wall on top, the upper surface one end of fixed cover 9 is equipped with the draw-in groove 14 with the mutual block of cardboard 13, cardboard 13 and draw-in groove 14 block, for simple block mode, be convenient for movable cover 12 to open and close.

As shown in fig. 3, the non-hinged end of the movable cover 12 is close to the top inner and outer side walls and is provided with a warning device, the warning device is located below the clamping plate 13, the warning device comprises a warning lamp 18 and a solar cell panel 17, a storage battery is arranged in the warning lamp 18, the storage battery and the solar cell panel 17 adopt a conventional connection mode of a conventional model, a switch of the warning lamp 18 is a spring switch 16, the spring switch 16 is located on the lower end face of the clamping plate 13, the movable cover 12 is opened by the top, the clamping plate 13 leaves the clamping groove 14, the spring switch 16 is changed into a bounce state from a squeezing state, when the spring switch 16 bounces, the warning lamp 18 is communicated with a passage of the storage battery, the warning lamp 18 starts to flicker, if the warning lamp 18 is not found for a long time, the warning lamp works by means that the solar cell panel 17 has electric energy conversion.

As shown in fig. 4, the ends of the upper support 2 and the lower support 3 opposite to the fusion tube 4 extend to the inner wall of the fixed cover 9, and the ends of the upper support 2 and the lower support 3 extending are provided with vertical bending plates 19, and the bending plates 19 are connected with the fixed cover 9 through two groups of bolts, so that the fixed positions of the drop-out fuse and the protective cover are increased, and the stability between the drop-out fuse and the protective cover is improved.

The bending plate 19 of upper bracket 2 is downward, and the bending plate 19 of lower carriage 3 is upward, does not influence the wiring and walks the line, and the surface that is located the outer bolt that is used for connecting bending plate 19 and fixed cover 9 of fixed cover 9 is equipped with the safety cover, and the safety cover includes shell 20 and flip 21, and flip 21's one end articulates in the upper end of shell 20, prevents that the bolt from rustting and being corroded, produces the influence to the stability of upper bracket 2 and lower carriage 3 and fixed cover 9.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A drop-out fuse with a protective cover comprises a fuse body, wherein the fuse body comprises an insulator (1), an upper support (2), a lower support (3) and a fusion tube (4), the upper support (2) and the lower support (3) are respectively positioned at the upper end and the lower end of the insulator (1), the lower end of the fusion tube (4) is connected with a conductive connecting piece of the lower support (3) through a pin shaft, the upper end of the fusion tube (4) is inserted into the protruding part of the conductive connecting piece of the upper support (2), the drop-out fuse is characterized by further comprising the protective cover which is in a cuboid shape and is positioned on the periphery of the fuse body, the protective cover comprises a fixed cover (9) and a movable cover (12), the movable cover (12) is a right-angle plate, a right-angle edge of the movable cover (12) is hinged with one end of the bottom surface of the fixed cover (9), and the other right-angle edge of the movable cover (12) is movably connected with one end of the upper surface of the fixed cover (9), be equipped with clamp connecting piece (5) in the middle of the outer wall of insulator (1), the support end of clamp connecting piece (5) extends to fixed cover (9) surface and is equipped with mounting bracket (6), the end of clamp connecting piece (5) is equipped with interior disc (7), and interior disc (7) are located fixed cover (9) inner wall, the initiating terminal of mounting bracket (6) is equipped with outer disc (8), and outer disc (8) are located fixed cover (9) outer wall, outer disc (8) and interior disc (7) are through a plurality of groups bolt fixed connection.

2. A drop-out fuse with protective cover according to claim 1, characterised in that the end of the fixed cover (9) close to the mounting frame (6) is provided with a wire inlet (10) and a wire outlet (11), the wire inlet (10) being located above the level of the upper bracket (2) and the wire outlet (11) being located below the level of the lower bracket (3).

3. A drop out fuse with protective cover according to claim 1, wherein the non-hinged end of the movable cover (12) is provided with a pull ring (15) on its outer side wall near the top end.

4. A drop-out fuse with protective cover according to claim 1, characterized in that the inner side wall of the non-hinged end of the movable cover (12) near the top end is provided with a snap-gauge (13), and one end of the upper surface of the fixed cover (9) is provided with a snap-in groove (14) which is mutually clamped with the snap-gauge (13).

5. The drop-out fuse with the protective cover according to claim 4, characterized in that the non-hinged end of the movable cover (12) near the top end is provided with a warning device on the inner and outer side walls, the warning device is located below the snap-gauge (13), the warning device comprises a warning lamp (18) and a solar panel (17), the switch of the warning lamp (18) is a spring-type switch (16), and the spring-type switch (16) is located on the lower end face of the snap-gauge (13).

6. A drop-out fuse with protective cover according to claim 1, characterized in that the ends of the upper bracket (2) and the lower bracket (3) opposite to the fuse tube (4) both extend to the inner wall of the fixed cover (9), and the ends of the upper bracket (2) and the lower bracket (3) extending are both provided with vertical bending plates (19), and the bending plates (19) are connected with the cover body of the fixed cover (9) through two sets of bolts.

7. A drop-out fuse with protective cover according to claim 6, characterized in that the bending plate (19) of the upper bracket (2) is downward, the bending plate (19) of the lower bracket (3) is upward, the outer surface of the bolt for connecting the bending plate (19) and the fixed cover (9) outside the fixed cover (9) is provided with a protective cover, the protective cover comprises a housing (20) and a flip cover (21), and one end of the flip cover (21) is hinged at the upper end of the housing (20).