CN2256165Y - Two throwing-in falling fuse - Google Patents

Abstract

The utility model relates to a two throwing-in falling fuse which belongs to an overload and overcurrent protection and circuit switching device for an outdoor transformer. The utility model is characterized in that a spare throwing fuse tube which is newly arranged and a known main fuse tube form a mutual free rotation connection through a conduction link shaft under a spare throwing fuse; the upper end of the spare throwing fuse tube is arranged between two arms of a spare throwing fuse tube limiting mechanism. A spare throwing fuse tube toggle mechanism is fixedly connected with a main fuse. When the main fuse tube falls because of various reasons, the spare throwing fuse tube toggle mechanism is driven to drive the spare throwing fuse tube to move to the direction of a fixed contact in order to make the fixed contact and a moving contact engaged and form an electricity loop. The utility model can greatly shorten the power off time of outdoor transformers cause by various reasons.

Description

Double-throw formula drop out fuse

The utility model belongs to a kind of overload, overcurrent protection and electric line make and break device of outdoor transformer.

Known fuse switch is China's the most frequently used equipment protection and line circuit make and break device such as outdoor transformer in the 10KV supply network at present.Its operation principle is: when overload or short circuit take place the load side of this fuse, fuse failure in the main fuse pipe, to the main fuse pipe and the release of upper contact head releasing mechanism that make by the locking of fuse pulling force, at this moment the main fuse pipe that tilts to install falls by deadweight, make the transformer of fault or overload break away from the power supply power failure, thus the accident scope of having avoided the equipment scaling loss and having protected big electrical network.There is following shortcoming in known fuse switch: 1, when power supply, particularly when powering to important load, because all external causes, as this equipment falling mechanism sole mass problem, the fuse quality problems or install improper, and return to normal rapidly again after load side lead or the equipment generation instantaneous short-circuit etc., the main fuse pipe is fallen, cause unnecessary to have a power failure when long; 2, this equipment belongs to high-tension apparatus, when sending electricity once more, must could be closed once more with insulating bar by professional electrician, and this has just further prolonged interruption duration, causes unnecessary economic loss; 3, be difficult to after power failure distinguish as early as possible that failure cause is the quality problems of equipment own, overload or short circuit accident have still taken place.

The purpose of this utility model is the problems referred to above that exist at fuse switch, and a kind of double-throw formula drop out fuse that can shorten interruption duration significantly is provided.

Double-throw formula drop out fuse, comprise power supply downlead, load side lead-out wire, magnetic bearing insulator, down conduct electricity disjunctor, on conduct electricity disjunctor, main fuse pipe, fully throw cartridge fuse, moving contact, fully throw the cartridge fuse toggle mechanism, fully throw conduct electricity on the fuse disjunctor, fixed contact, throw cartridge fuse limiting mechanism and throw conduction connecting shaft under the fuse fully fully.The end of disjunctor of conducting electricity down is fixed on the lower end of magnetic bearing insulator, on conduct electricity an end of disjunctor and be fixed on the upper end of magnetic bearing insulator.The other end of last conduction disjunctor is fixed with upper contact head.The rear end of throwing conduction disjunctor on the fuse fully is vertically fixed on the conduction disjunctor, throws the cartridge fuse limiting mechanism fully and is fixed on the front portion of throwing conduction disjunctor on the fuse fully.Throw on the fuse conduction disjunctor fully and be fixed contact in the part of throwing fully between cartridge fuse limiting mechanism two arms.The inboard, lower end of throwing two arms of cartridge fuse limiting mechanism fully is provided with the falling stop device.Throw the cartridge fuse limiting mechanism fully and make by insulating material, firm and flexible.The axis hole that conducts electricity on the disjunctor is passed down in the rear end of throwing under the fuse conduction connecting shaft fully.Main fuse pipe lower end is fixed on throws under the fuse on the conduction connecting shaft fully, becomes one structure, and keeps good electrical to connect.Main fuse pipe upper end is connected with upper contact head by fuse.The upper end of throwing the fuse toggle mechanism fully is fixed on throws under the fuse on the conduction connecting shaft fully, by adjusting the setting angle of throwing fully between cartridge fuse toggle mechanism and the main fuse pipe, can adjust and is equipped with the throwing time.Throwing the cartridge fuse toggle mechanism is fully made by insulating material.Be provided with moving contact in the upper end of throwing cartridge fuse fully, be fixed with the metal cover for seat in the lower end of throwing cartridge fuse fully.The spring tension fuse is housed throwing fully in the cartridge fuse, the top of this fuse is connected with moving contact, and its underpart is connected with the metal pedestal cover.Throw the metal cover for seat of cartridge fuse lower end fully, be sleeved on and throw fully under the fuse on the conduction connecting shaft, and can rotate flexibly and along throwing conduction connecting shaft slip fuse under fully.The top of throwing cartridge fuse fully is arranged in the falling stop device of throwing the cartridge fuse limiting mechanism fully, make it lean on from gravity to deviate from, and can pull out or advance in the falling stop device throwing cartridge fuse fully by external force, therefore main fuse pipe and throw cartridge fuse fully and form and freely be rotationally connected mutually, main fuse Guan Yubei throws the cartridge fuse toggle mechanism and forms a fixed connection, when the main fuse pipe falls because of various reasons, can drive and throw the cartridge fuse toggle mechanism fully around throwing conduction connecting shaft rotation under the fuse fully, and promote to throw cartridge fuse fully, make the moving contact of throwing the cartridge fuse upper end fully and throw the fixed contact interlock on the conduction disjunctor on the fuse fully.The power supply downlead is connected with last conduction disjunctor, and the load side lead-out wire is connected with following conduction disjunctor.

The utility model in use, when the main fuse pipe falls for various reasons, and the conduction connecting shaft rotates under fuse to drive throwing fully of being connected as a single entity with it, throw fully cartridge fuse toggle mechanism half-twist～60 ° (about 1 second left and right sides time) thereby drive, conduction disjunctor direction moves on the fuse to throwing fully with being preset in the cartridge fuse strike of throwing fully of throwing fully in the cartridge fuse limiting mechanism, and makes the moving contact of throwing the cartridge fuse upper end fully and throw the fixed contact interlock on the conduction disjunctor on the fuse fully.At this moment, circuit through the power supply downlead, fully throw conduct electricity on the fuse disjunctor, moving contact, fully throw cartridge fuse, fully throw conduction connecting shaft under the fuse, conducting electricity disjunctor and load side lead-out wire constitutes the loop down, makes the load restoration power supply.When failure cause be by load side when long overload or permanent fault institute extremely, the fuse that throw fully in the cartridge fuse this moment will fuse, and pulls out rapidly by the back-moving spring that is arranged on wherein, thereby cuts off the electricity supply reliably.If other moment random failure, will continue to send electricity by throwing fuse fully, find that when next electrician patrols and examines the main fuse pipe comes off, and repairs.

The utility model is owing to adopt the double-throw device, preferably resolve recurrent former fuse switch in the present domestic electrical network, because its falling mechanism sole mass problem, the fuse quality problems or install improper, and the main fuse pipe that various reasons such as return to normal rapidly again after load side lead or the equipment generation instantaneous short-circuit causes falls, and causes down necessary power failure fault when long.It can shorten interruption duration significantly, a series of economic dispatch aspect loss that effective minimizing causes thus.For some important power loads, its benefit is more obvious.Particularly the utility model is with the main fuse pipe with throw cartridge fuse fully and be set as two bodies, and this makes it install respectively and to take apart on the one hand, makes maintenance work very convenient; On the other hand, it is in operation the moving contact of throwing cartridge fuse fully and occupy top, thereby kept the safe distance of old-fashioned fuse switch to the transformer table top, guaranteed electric equipment safety and maintenance personal's personal safety, and needn't change the installation site of miscellaneous equipment owing to changing this device, and change existing such as design and installation standards such as change platforms.

Fig. 1 is the front view of a kind of embodiment of the present utility model, and Fig. 2 is the left view of Fig. 1.The utility model is described in further detail below in conjunction with accompanying drawing.

Double-throw formula drop out fuse, comprise power supply downlead 10, load side lead-out wire 13, magnetic bearing insulator 1, on conduct electricity disjunctor 2, down conduct electricity disjunctor 5, fully throw conduction connecting shaft 11 under the fuse, main fuse pipe 4, fully throw cartridge fuse 9, fully throw conduction disjunctor 6 on the fuse, throw cartridge fuse toggle mechanism 12 and throw cartridge fuse limiting mechanism 7 fully fully.The rear end of last conduction disjunctor 2 is fixed on the upper end of magnetic bearing insulator 1, and its front end is fixed with upper contact head 14.Conducting electricity the rear end of disjunctor 5 down is fixed on the lower end of magnetic bearing insulator 1, and the front end of following conduction disjunctor 5 has axis hole, and the rear end of throwing conduction connecting shaft 11 fuse under fully is arranged on down conducts electricity in the axis hole of front end of disjunctor 5.The rear end of throwing conduction disjunctor 6 on the fuse fully is vertically fixed on the conduction disjunctor 2, its front end passes the through hole 15 on two arms of throwing cartridge fuse limiting mechanism 7 fully, throw conduction disjunctor 6 on the fuse fully, be positioned at the part between two arms of throwing cartridge fuse limiting mechanism 7 fully, be fixed contact 17.On the inwall of the two arm lower ends of throwing cartridge fuse limiting mechanism 7 fully, be fixed with 2 salient points 3 (falling stop device).Throwing cartridge fuse limiting mechanism 7 usefulness nylon six fully makes.The upper end of main fuse pipe 4 is connected with upper contact head 14 by fuse, and its lower end is fixed on throws under the fuse on the conduction connecting shaft 11 fully.Throw cartridge fuse toggle mechanism 12 fully, be the connecting lever structure, the upper end of connecting lever is fixed on by bolt 18 and throws fully under the fuse on the conduction connecting shaft 11, and the connecting lever termination is vertical with the outer arm of throwing cartridge fuse limiting mechanism 7 fully.Connecting lever is made of plastics.The upper end of throwing cartridge fuse 9 fully is fixed with moving contact 8, and the lower end of throwing cartridge fuse 9 fully is fixed with metal cover for seat 16, and metal cover for seat 16 is sleeved on throws under the fuse on the conduction connecting shaft 11 fully, constitutes with main fuse pipe 4 to be rotationally connected automatically.The top of throwing cartridge fuse 9 fully is arranged on throws in the cartridge fuse limiting mechanism 7 fully, is blocked by 2 salient points 3, makes to throw cartridge fuse 9 fully by not coming off from gravity.Power supply downlead 10 is connected with last conduction disjunctor 2, and load side lead-out wire 13 is connected with following conduction disjunctor 5.

Claims (2)

1, double-throw formula drop out fuse, comprise power supply downlead (10), load side lead-out wire (13), magnetic bearing insulator (1), on conduct electricity disjunctor (2), down conduct electricity disjunctor (5), fully throw conduction connecting shaft (11) under the fuse, main fuse pipe (4), fully throw cartridge fuse (9), fully throw conduct electricity on the fuse disjunctor (6), throw cartridge fuse toggle mechanism (12) fully and throw cartridge fuse limiting mechanism (7) fully by what insulating material was made; The rear end of last conduction disjunctor (2) is fixed on the upper end of magnetic bearing insulator (1), and its front end is fixed with upper contact head (14); Conducting electricity the rear end of disjunctor (5) down is fixed on the lower end of magnetic bearing insulator (1), and its front end has axis hole; The rear end of throwing conduction connecting shaft (11) under the fuse fully is arranged on down in the axis hole of conduction disjunctor (5) front end, the upper end of main fuse pipe (4) is connected with upper contact head (14) by fuse, it is characterized in that described the throwing fully conduct electricity the rear end of disjunctor (6) and be vertically fixed on the conduction disjunctor (2) on the fuse, its front end passes the through hole (15) on two arms of throwing cartridge fuse limiting mechanism (7) fully, throw fully that to conduct electricity the part that is positioned between two arms of throwing cartridge fuse limiting mechanism (7) fully on the disjunctor (6) on the fuse be fixed contact (17), two arms of throwing cartridge fuse limiting mechanism (7) fully are provided with the falling stop device; Described upper end of throwing cartridge fuse (9) fully is fixed with moving contact (8), and its lower end is fixed with metal cover for seat (16); Throw the top of cartridge fuse (9) fully, blocked by the falling stop device of throwing cartridge fuse limiting mechanism (7) fully, the metal cover for seat (16) of throwing cartridge fuse (9) fully is sleeved on throws under the fuse on the conduction connecting shaft (11) fully; Main fuse pipe (4) with throw cartridge fuse (9) fully and constitute and freely be rotationally connected mutually; Described upper end of throwing cartridge fuse toggle mechanism (12) fully is fixed on throws under the fuse on the conduction connecting shaft (11) fully, and the lower end of main fuse pipe (4) is fixed on to throw fully conducts electricity fuse under on the connecting shaft (11); Main fuse pipe (4) with throw cartridge fuse (9) fully and constitute and freely be rotationally connected mutually; Described upper end of throwing cartridge fuse toggle mechanism (12) fully is fixed on throws under the fuse on the conduction connecting shaft (11) fully, main fuse pipe (4) is when falling, can drive and throw cartridge fuse (9) rotation fully, and promote to throw cartridge fuse (9) fully, make its moving contact (8) and fixed contact (17) interlock.

2, double-throw formula drop out fuse according to claim 1 is characterized in that the described cartridge fuse toggle mechanism (12) of throwing fully, is the connecting lever that is made of plastics, and the termination of connecting lever is vertical with the outer arm of throwing cartridge fuse limiting mechanism (7) fully; Described falling stop device is 2 salient points (3) on the inwall that is arranged on the two arm lower ends of throwing cartridge fuse limiting mechanism (7) fully.

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