Intelligent drop-out fuse

Abstract

The utility model relates to the technical field of high-voltage fuses, in particular to an intelligent drop-out fuse which comprises insulators and a fuse tube, the insulators comprise a first insulator and a second insulator, the first insulator is connected with the second insulator through an electric push rod, and the electric push rod is connected with the fuse tube. The opposite end parts of the first insulator and the second insulator are respectively provided with a first connecting piece and a second connecting piece, the first connecting piece is provided with an upper pressing nozzle, the second connecting piece is provided with a trunnion sleeve, and a fuse tube is arranged between the upper pressing nozzle and the trunnion sleeve. The two insulators are arranged, the electric push rod is arranged between the two insulators, bidirectional movement of the insulators is controlled, automatic falling of the fuse tube is facilitated, manual or mechanical outward pulling is not needed, the damage probability of the fuse tube is reduced, and the electric push rod can be effectively prevented from being damaged by high-voltage discharge through the insulating telescopic cover arranged on the electric push rod in a sleeving mode. The service life of the electric push rod is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage fuses, in particular to an intelligent drop-out fuse. Background Art

[0002] The drop-out fuse is the most commonly used short-circuit protection switch for 10kV distribution line branch lines and distribution transformers. It is economical, easy to operate, and highly adaptable to outdoor environments. It is widely used on the primary side of 10kV distribution lines and distribution transformers for protection and equipment switching operations.

[0003] An intelligent breaking electric drop-out fuse system with the announcement number (CN114242539A) includes a fuse body, the fuse body includes a disconnecting hook, an insulating support, a fuse tube and a disconnecting hook base, the disconnecting hook base includes: a U-shaped seat, connected to the insulating support; a U-shaped rocker arm, the two inner sides of the U-shaped rocker arm are rotatably connected to the two outer sides of the U-shaped seat through a first connecting shaft, and the U-shaped rocker arm is connected to the disconnecting hook; a limiting mechanism is arranged on the U-shaped rocker arm; a buffer mechanism is arranged on the U-shaped seat. A limiting mechanism is arranged, and the limiting mechanism is used to limit the rotation of the U-shaped seat to prevent the U-shaped seat from swinging back to an angle of 360 degrees, which affects the use of the fuse; and the above-mentioned limiting mechanism has the advantage of a simple structure; a buffer mechanism is arranged to prevent oscillation when the U-shaped seat swings back, and plays a buffering role.

[0004] Under normal circumstances, it can achieve the effect of intelligent breaking. However, when the mechanical transmission structure fails, it will make it difficult for the fuse tube to fall off, posing a major safety hazard. Its breaking is based on the principle of leverage. The push rod applies force to the upper half of the fuse tube. When the upper contact of the fuse tube is stuck into the upper pressure nozzle, the force received by the upper half of the fuse tube is enhanced. After multiple breaking, the life of the fuse tube will be reduced. In addition, the overall structure of the above device is relatively complicated, which is not convenient for later maintenance. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an intelligent drop-out fuse. By arranging two insulators and arranging an electric push rod between the two insulators, the bidirectional movement of the insulators is controlled to facilitate the automatic falling off of the fuse tube without manual or mechanical pulling outwards, thereby reducing the probability of damage to the fuse tube. The insulating telescopic cover sleeved on the electric push rod can effectively prevent the electric push rod from being damaged by high-voltage discharge, thereby increasing the service life of the electric push rod.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An intelligent drop-out fuse comprises an insulator and a fuse tube, wherein the insulator comprises a first insulator and a second insulator, the first insulator and the second insulator are connected via an electric push rod, the first insulator and the second insulator are respectively provided with a first connecting piece and a second connecting piece at their facing ends, the first connecting piece is provided with an upper pressure nozzle, the second connecting piece is provided with an ear shaft sleeve, and the fuse tube is provided between the upper pressure nozzle and the ear shaft sleeve.

[0008] Preferably, a protective cover is provided on the upper cover of the first connecting member, an upper end connector electrically connected to the upper pressure nozzle is provided on the protective cover, and a connecting buckle abutting against the upper pressure nozzle is provided on the lower surface of the first connecting member.

[0009] Preferably, the top of the fuse tube is a spherical upper contact, the upper contact abuts against the free end of the upper pressure nozzle, a spherical groove is provided at the part where the upper pressure nozzle abuts against the upper contact, a spring is provided between the upper edge surface of the spherical groove and the protective cover, and a pull ring is provided on one side of the upper end of the fuse tube.

[0010] Preferably, a rotating shaft is provided at the bottom of the fuse tube, and the rotating shaft is rotatably installed in the ear shaft sleeve, a lower end contact is provided on one side of the lower end of the fuse tube, a lower pressure nozzle is installed on the second connecting piece, the lower pressure nozzle abuts against the lower end contact, and a lower end connector electrically connected to the lower pressure nozzle is installed on the lower surface of the second connecting piece.

[0011] Preferably, the main body of the electric push rod is connected to one end of the first insulator away from the first connecting piece, the power output end of the electric push rod is connected to one end of the second insulator away from the second connecting piece, a mounting bracket is provided on one side of the main body of the electric push rod, and an insulating telescopic cover is provided on the electric push rod.

[0012] Preferably, one end of the insulating telescopic cover is connected to an end of the first insulator away from the first connecting piece, and the other end of the insulating telescopic cover is connected to an end of the second insulator away from the second connecting piece.

[0013] Preferably, the electric push rod is electrically connected to an external controller, a battery is provided on the controller, and the controller is signal-connected to an external remote control device.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model has a simple structure. By setting two insulators and an electric push rod between the two insulators, the two-way movement of the insulators is controlled, which makes it easy for the fuse tube to automatically fall off without manual or mechanical pulling outwards, thereby reducing the probability of damage to the fuse tube. At the same time, when the electric push rod fails, the fuse tube can also be manually separated to avoid other safety hazards. The structure of the device is simple and effective, which is more conducive to later maintenance and reduces the cost of use.

[0016] 2. The insulating telescopic cover installed on the electric push rod of this device can effectively prevent the high-voltage discharge from damaging the electric push rod, and can also effectively prevent external dust or other floating objects from entering the electric push rod, thereby increasing the service life of the electric push rod, reducing the probability of maintenance caused by the external environment, and further reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 A schematic diagram of the structure of an insulating telescopic cover for an electric push rod cover.

[0020] In the figure: 1. first insulator; 2. electric push rod; 3. second insulator; 4. mounting bracket; 5. insulating telescopic cover; 6. upper connector; 7. protective cover; 8. upper contact; 9. connecting buckle; 10. pull ring; 11. fuse tube; 12. ear shaft sleeve; 13. rotating shaft; 14. lower contact; 15. lower connector; 16. first connecting piece; 17. second connecting piece; 18. spring; 19. upper pressure nozzle; 20. lower pressure nozzle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] An intelligent drop-out fuse, the structure of which is as follows Figure 1-Figure 2As shown, it includes an insulator and a fuse tube 11. The insulator includes a first insulator 1 and a second insulator 3. The first insulator 1 and the second insulator 3 are connected by an electric push rod 2. The first insulator 1 and the second insulator 3 are respectively provided with a first connector 16 and a second connector 17 at the ends facing each other. The first connector 16 is provided with an upper pressure nozzle 19, and the second connector 17 is provided with an ear shaft sleeve 12. The fuse tube 11 is provided between the upper pressure nozzle 19 and the ear shaft sleeve 12. The electric push rod 2 is electrically connected to an external controller, and a battery is provided on the controller. The controller is connected to an external remote control device by signal. The main body of the electric push rod 2 is connected to an end of the first insulator 1 away from the first connector 16, and the power output end of the electric push rod 2 is connected to an end of the second insulator 3 away from the second connector 17. A mounting bracket 4 is provided on one side of the main body of the electric push rod 2. A protective cover 7 is provided on the upper cover of the first connecting member 16 , and an upper end connector 6 electrically connected to the upper pressure nozzle 19 is provided on the protective cover 7 . A connecting buckle 9 abutting against the upper pressure nozzle 19 is provided on the lower surface of the first connecting member 16 .

[0024] When it is necessary to disconnect the fuse tube 11, the operator can control the electric push rod 2 on the corresponding fuse to work through the remote control device. When the power output end of the electric push rod 2 pushes the second insulator 3 away from the first insulator 1, the distance between the insulators increases, while the length of the fuse tube 11 remains unchanged. Therefore, when the second insulator 3 is pushed to a certain position, the weight of the fuse tube 11 moves downward, and the upper end of the fuse tube 11 is separated from the upper pressure nozzle 19. The lower end of the fuse tube 11 is rotatably connected to the ear shaft sleeve 12 through the rotating shaft 13. Therefore, the lower end of the fuse tube 11 rotates, and its upper end falls freely from the upper pressure nozzle 19 and moves away from the upper pressure nozzle 19, thereby achieving the effect of disconnecting the circuit.

[0025] The first connector 16 is covered with a protective cover 7, and the protective cover 7 is provided with an upper connector 6 electrically connected to the upper pressure nozzle 19, and the lower surface of the first connector 16 is provided with a connecting buckle 9 abutting against the upper pressure nozzle 19. The top of the fuse tube 11 is a spherical upper contact 8, and the upper contact 8 abuts against the free end of the upper pressure nozzle 19. The part where the upper pressure nozzle 19 abuts against the upper contact 8 is provided with a spherical groove, and a spring 18 is provided between the upper side of the spherical groove and the protective cover 7. A pull ring 10 is provided on one side of the upper end of the fuse tube 11. A rotating shaft 13 is provided at the bottom of the fuse tube 11, and the rotating shaft 13 is rotatably installed in the ear shaft sleeve 12. A lower end contact 14 is provided on one side of the lower end of the fuse tube 11. A lower pressure nozzle 20 is installed on the second connecting member 17, and the lower pressure nozzle 20 abuts against the lower end contact 14. A lower end connector 15 electrically connected to the lower pressure nozzle 20 is installed on the lower surface of the second connecting member 17.

[0026] When the circuit needs to be opened and the electric push rod 2 fails and cannot be used, in order to avoid causing greater hidden dangers, the operator can hook the connecting buckle 9 and the pull ring 10 through the insulating rod, and pull the upper end contact 8 of the fuse tube 11 out of the upper pressure nozzle 19 to disconnect the connection. The connecting buckle 9 can effectively prevent the operator from using excessive force and damaging the fuse tube 11.

[0027] When the power is on, the upper contact 8 of the fuse tube 11 abuts against the upper pressure nozzle 19, the lower contact 14 of the fuse tube 11 abuts against the lower pressure nozzle 20, and the rotating shaft 13 is rotatably connected with the ear shaft sleeve 12. Since a spring 18 is provided between the upper pressure nozzle 19 and the protective cover 7, the upper pressure nozzle 19 can move up and down, so that the upper contact 8 of the fuse tube 11 can be stuck into the parallel groove of the upper pressure nozzle 19, or detached from the spherical groove. The spring 18 is in a compressed state when the upper contact 8 of the fuse tube 11 abuts against the upper pressure nozzle 19, so it can generate a certain pressure on the fuse tube 11 to prevent the upper contact 8 of the fuse tube 11 from falling off from the spherical groove.

[0028] In the power-off state, the upper contact 8 of the fuse tube 11 is disengaged from the spherical groove of the upper pressure nozzle 19, and the spring 18 is reset. Since the lower end of the fuse tube 11 is connected to the ear shaft sleeve 12 by rotation, the fuse tube 11 is free to rotate, and the upper contact 8 falls off from the upper pressure nozzle 19, but the rotating shaft 13 is still in the ear shaft sleeve 12, so that the later operator can quickly and directly insert the upper contact 8 into the spherical groove of the upper pressure nozzle 19 to achieve rapid power-on.

[0029] Embodiment 2

[0030] Based on the first embodiment, Figure 3 As shown, an insulating telescopic cover 5 is provided on the electric push rod 2, one end of the insulating telescopic cover 5 is connected to an end of the first insulator 1 away from the first connecting piece 16, and the other end of the insulating telescopic cover 5 is connected to an end of the second insulator 3 away from the second connecting piece 17.

[0031] The insulating telescopic cover 5 sleeved on the electric push rod 2 can be telescoped together with the electric push rod 2 when it is working, effectively preventing the electric push rod 2 from being damaged by high-voltage discharge, and at the same time effectively preventing external dust or other floating objects from entering the electric push rod 2, thereby increasing the service life of the electric push rod 2, reducing the probability of maintenance caused by the external environment, and further reducing maintenance costs.

[0032] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or additions, subtractions or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An intelligent drop-out fuse, comprising an insulator and a fuse tube (11), characterized in that: The insulator comprises a first insulator (1) and a second insulator (3); the first insulator (1) and the second insulator (3) are connected via an electric push rod (2); the first insulator (1) and the second insulator (3) are respectively provided with a first connecting piece (16) and a second connecting piece (17) at the ends facing each other; the first connecting piece (16) is provided with an upper pressure nozzle (19); the second connecting piece (17) is provided with an ear shaft sleeve (12); and a fuse tube (11) is provided between the upper pressure nozzle (19) and the ear shaft sleeve (12).

2. The intelligent drop-out fuse according to claim 1, characterized in that: A protective cover (7) is provided on the upper cover of the first connecting member (16), an upper end connector (6) electrically connected to the upper pressure nozzle (19) is provided on the protective cover (7), and a connecting buckle (9) abutting against the upper pressure nozzle (19) is provided on the lower surface of the first connecting member (16).

3. The intelligent drop-out fuse according to claim 1, characterized in that: The top end of the fuse tube (11) is a spherical upper contact (8), the upper contact (8) abuts against the free end of the upper pressure nozzle (19), a spherical groove is provided at the portion where the upper pressure nozzle (19) abuts against the upper contact (8), a spring (18) is provided between the upper edge of the spherical groove and the protective cover (7), and a pull ring (10) is provided on one side of the upper end of the fuse tube (11).

4. The intelligent drop-out fuse according to claim 1, characterized in that: A rotating shaft (13) is arranged at the bottom of the fuse tube (11), and the rotating shaft (13) is rotatably mounted in the ear shaft sleeve (12); a lower end contact (14) is arranged on one side of the lower end of the fuse tube (11); a lower pressure nozzle (20) is arranged on the second connecting member (17), and the lower pressure nozzle (20) abuts against the lower end contact (14); and a lower end connector (15) electrically connected to the lower pressure nozzle (20) is arranged on the lower surface of the second connecting member (17).

5. The intelligent drop-out fuse according to claim 1, characterized in that: The main body of the electric push rod (2) is connected to an end of the first insulator (1) away from the first connecting piece (16), and the power output end of the electric push rod (2) is connected to an end of the second insulator (3) away from the second connecting piece (17). A mounting bracket (4) is provided on one side of the main body of the electric push rod (2), and an insulating telescopic cover (5) is provided on the upper cover of the electric push rod (2).

6. The intelligent drop-out fuse according to claim 5, characterized in that: One end of the insulating telescopic cover (5) is connected to an end of the first insulator (1) away from the first connecting piece (16), and the other end of the insulating telescopic cover (5) is connected to an end of the second insulator (3) away from the second connecting piece (17).

7. The intelligent drop-out fuse according to claim 1, characterized in that: The electric push rod (2) is electrically connected to an external controller, a storage battery is provided on the controller, and the controller is signal-connected to an external remote control device.

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