CN100501895C

CN100501895C - Explosion circuit breaker

Info

Publication number: CN100501895C
Application number: CNB2006100410868A
Authority: CN
Inventors: 宋执权; 傅鹏; 吴友国; 吴义兵
Original assignee: Institute of Plasma Physics of CAS
Current assignee: Institute of Plasma Physics of CAS
Priority date: 2006-07-19
Filing date: 2006-07-19
Publication date: 2009-06-17
Anticipated expiration: 2026-07-19
Also published as: CN1889220A

Abstract

The invention discloses a new type explosion breaker. The insulating barrel is installed on the underpan and on the barrel there is a upper disc with a hole in the center. There is a hole in the center of the underpan. The lower conducting ring is set around the hole. The lower conducting ring is set along the inner edge of the insulating barrel. There are a upper and a lower contactor between the upper and the lower conducting ring. Between two contactors is a insulating block in which sets detonator. The water-cooling ring is on the upper conducting ring. The bush presses on the water-cooling ring. The bush and the upper disc are connected. The structure is novel; the rated drop-out current is strong; the drop-out speed is fast; the drop-out reliability is nice. The new type explosion breaker is not only applied in the nuclear fusion device as the reserved switch, but in the electric system it has broad application prospect as the protective switch.

Description

The new use for explosive circuit breaker

Technical field

The invention belongs to a kind of novel high-power mechanical switch equipment, specifically is a kind of new use for explosive circuit breaker.

Background technology

Existing conventional mechanical switch is to make moving contact realize contact closure and make energy-stored spring finish energy storage through certain stroke by jointed gear unit, for the switch disjunction is got ready, in case switch needs disjunction, the tripping mechanism action, energy-stored spring discharges rapidly and makes switch movable contact and fixed contact break away from the disjunction of realization switch fast, this use spring is as the mechanical switch of drive unit, and drop-out current is less, breaking speed is slow and reliability is relatively low.Though existing bridge-type explosion switch is simple in structure, breaking speed is fast; but its disadvantage is that the long-term work electric current is little; as the magnet quenching backup protection switch in the EAST tokamak device; it is fast that the requirement switch must have breaking speed; but long-time bearing and cut-off characteristics such as big electric current and reliable breaking height; the existing mechanical switch can not meet the demands, and the new use for explosive breaker apparatus of invention can satisfy above-mentioned requirements.The new use for explosive breaker apparatus is a kind of special machine switch that drives with explosive, the combined floodgate of this circuit breaker is by manually contact being placed, compress with bolt then, the switch disjunction then is by cap sensitive explosive, section breaker under the great force of the detonation wave that explosive charge produces, its structure is different fully with the bridge-type explosion switch, and advantage is that simple in structure, breaking speed is fast, carrying and drop-out current is big and the reliable breaking height.

Summary of the invention

Purpose of the present invention is exactly to solve under the condition that conventional mechanical switch can not be satisfied the demand, and provides a kind of new use for explosive circuit breaker to satisfy actual instructions for use.

Technical scheme of the present invention is as follows:

The new use for explosive circuit breaker, it is characterized in that including the chassis, insulating cylinder is installed on the chassis, the last disk of perforate in the middle of being equipped with on the insulating cylinder, chassis central porose, the edge in hole is placed with down conducting ring, be placed with conducting ring on the inside edge of insulating cylinder, clamping has upper and lower contact between the upper and lower conducting ring, be placed with collets between the upper and lower contact, explosive is installed in the collets, be placed with the water cooling ring on the last conducting ring, lining is pressed on the water cooling ring, and is fixedly connected between lining and the last disk.

Described conducting ring down has ring set outward, is fixedly mounted on the chassis.

Described chassis is made up of the ring platform of cylinder and cylinder lower edge, described conducting ring down is placed on the upper edge of cylinder, and cylinder has ring set to be installed in outside the cylinder by screw thread outward, and the cylinder inner wall retaining is outside following conducting ring, and between the following contact collar is arranged, pass through bolt between insulating cylinder and the ring platform.

Between described conducting ring down and the following contact, contact-making surface is the inclined plane between last conducting ring and the upper contact head.

Described collets are the middle shuttle wheel shape that through hole is arranged, and explosive is installed in the through hole.

Be bolted to connection between described lining and the last disk.

New use for explosive circuit breaker basic structure mainly is made up of switch main body, contact system, fixture and drive part.The switch main body part is made up of last disk, chassis, insulating cylinder and bolt; Upper and lower contact and upper and lower conducting ring have been formed contact system; Water-cooling ring, lining and bolt have formed fixture; Drive part is made of the collets between detonator, explosive and upper and lower contact, and detonator and explosive are between collets.

The new use for explosive circuit breaker is can be for a long time inner by the 20kA rated current not to have too high temperature rise to be all to have designed water-cooling channel in last disk, chassis and the water-cooling ring in the switch, during the switch long-time running, the heat that produces by cooling water in the water-cooling channel and switch contact point place carries out heat exchange, to whole switch be limited in the little limit of temperature rise owing to most of Joule heat that contact resistance produces is taken switch out of.The explosive and the detonator that are positioned at switch inside are in below the safe initiation temperature, have guaranteed their trouble free service.

The basic functional principle of new use for explosive circuit breaker is to utilize detonator and explosive under the huge detonation wave pressure that explosion time produces, make and be in, collets between following contact produce radial deformation, collets expand the huge thrust place of making that produces rapidly thereon, two contacts of upper/lower positions thrust rapidly respectively, following conducting ring is concurrent estranged from motion, the electric arc that produces in the contact separation process is extinguished rapidly under huge detonation wave air-flow effect, drop-out current at once by switch to the branch road change of current in parallel with it, this moment, the medium dielectric strength of switch was recovered the complete disjunction of switch rapidly.

The invention of this switchgear has novel structure, and specified drop-out current is big, and the speed of cut-offfing is fast, the reliable breaking advantages of higher; This new use for explosive circuit breaker not only is used for nuclear fusion device as quench backup protection switch, and has a wide range of applications as protection switch in electric power system.

Description of drawings

Figure 1 shows that the basic block diagram of new use for explosive circuit breaker invention equipment.

Fig. 2 is the shape contrast figure of collets before and after explosive charge among Fig. 1.

Embodiment

Below in conjunction with accompanying drawing concrete use of the present invention is described in further detail.

As shown in Figure 1, the new use for explosive circuit breaker, last disk 3, chassis 7, insulating cylinder 5 and bolt have been formed switch main body; Contact system is made of upper contact head 11, following contact 9, upper and lower conducting ring 6, and dead ring 4 is enclosed within outside the upper and lower contact; Water-cooling ring 2, steel sleeve 1 and bolt have formed fixture, important drive part is made of the collets 10 between detonator 12, explosive 13 and upper and lower contact, collets 10 shapes are the shuttle wheel shape as shown in Figure 2, and wherein detonator 12 and explosive 13 are arranged in the through hole of collets 10 centres.

Chassis 7 is made up of the ring platform of cylinder and cylinder lower edge, insulating cylinder 5 is installed on the ring platform by bolt, and following conducting ring 6 is placed on the upper edge of cylinder, and cylinder has ring set to be installed in outside the cylinder by screw thread outward, cylinder inner wall keeps off outside following conducting ring 6, and between the following contact 9 collar is arranged.

The last disk 3 of perforate in the middle of being equipped with on the insulating cylinder 5, be placed with conducting ring 6 on the inside edge of insulating cylinder 5, clamping has upper contact head 11, following contact 9 between the upper and lower conducting ring 6, be placed with collets 10 between the upper and lower contact, be placed with water cooling ring 2 on the last conducting ring 6, steel sleeve 1 is pressed on the water cooling ring 2, is bolted to connection between steel sleeve 1 edge and the last disk 3.

Between following conducting ring 6 and the following contact 9, contact-making surface is the inclined plane between last conducting ring 6 and the upper contact head 11.

Present device has been used in the EAST superconduction nuclear fusion device, during normal operation of circuit breaker, to take circuit breaker out of owing to the heat that contact resistance produces by the cooling water pipe that is fixed on the water nozzle 8, make its internal temperature rise less, guaranteed that explosive and detonator are in below the safe flash point breaker safe reliably working.

The groundwork process is when the circuit breaker disjunction: when the magnet quenching signal arrives the detonator trigger equipment, the detonator trigger element sends time break detonating primer 12 and explosive 13 at once, under the huge detonation wave pressure that blast produces, collets 10 produce radial deformation (as shown in Figure 2), collets 10 expand rapidly, and to make the

contact

9,11 that is in its upper and lower position thrust upper and lower conducting ring 6 respectively rapidly concurrent estranged from motion for the huge thrusts that produce, upper contact head 11 moves upward in being fixed on steel sleeve, and following contact 9 moves downward up to falling to the ground.The electric arc that produces in the contact separation process extinguishes under huge detonation wave air-flow effect very soon, the dead ring 4 of this external contact outside can produce the gas that is beneficial to blow-out under the high arc temperature effect, this moment drop-out current at once by switch to the branch road change of current in parallel with it, this moment, switch medium dielectric strength was recovered the complete disjunction of switch rapidly.

Claims

1, the new use for explosive circuit breaker, include the chassis, mounting insulation tube on the chassis, the last disk of perforate in the middle of being equipped with on the insulating cylinder, chassis central authorities are porose, the edge, hole of chassis central authorities is placed with down conducting ring, place conducting ring on the inside edge of insulating cylinder, on, on between the following conducting ring there being clamping, following contact, on, be placed with collets between the following contact, explosive is installed in the collets, be placed with the water cooling ring on the last conducting ring, lining is pressed on the water cooling ring, fixedly connected between lining and the last disk, described conducting ring down has ring set outward, and ring set is fixedly mounted on the chassis, it is characterized in that described chassis is made up of the ring platform of cylinder and cylinder lower edge, described conducting ring down is placed on the upper edge of cylinder, and described ring set is installed in outside the cylinder by screw thread, and the cylinder inner wall retaining is outside following conducting ring, between described ring set and the following contact collar is arranged, pass through bolt between insulating cylinder and the ring platform.

2, new use for explosive circuit breaker according to claim 1 is characterized in that contact-making surface is the inclined-plane between last conducting ring and the upper contact head between described conducting ring down and the following contact.

3, new use for explosive circuit breaker according to claim 1 is characterized in that described collets are the middle shuttle wheel shape that through hole is arranged, and explosive is installed in the through hole.

4, new use for explosive circuit breaker according to claim 1 is characterized in that being bolted to connection between described lining and the last disk.