CN204424148U

CN204424148U - Environment protection type magnetic power circuit breaker arc control device

Info

Publication number: CN204424148U
Application number: CN201520120736.2U
Authority: CN
Inventors: 周盈裕
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-02
Filing date: 2015-03-02
Publication date: 2015-06-24
Anticipated expiration: 2025-03-02

Abstract

The utility model relates to a kind of environment protection type magnetic power circuit breaker arc control device, mainly includes housing, moving contact, fixed contact and arcing chamber; The sidewall of described arcing chamber is cartridge type; The upper end of described arcing chamber uses the sealing of piston sheet metal; Described piston sheet metal is connected to the top of arc control device by extension spring; The annular base with described arcing chamber form fit is installed with in the lower end of described arcing chamber; SF is filled with in described arcing chamber ₆gas; With the end of described fixed contact for the center of circle, level on the madial wall of described arcing chamber, circumference equidistantly offers jet; Each described jet uses seals with wax; On the madial wall of described annular base, symmetry is pasted with two in semiorbicular conducting ring; Magnetic induction loop is placed with in described annular base; The circuit breaker using these arc control device to make can efficient arc extinguishing, and gas jet velocity is powerful, and these arc control device can reclaim noxious substance simultaneously, effectively prevents poison gas from leaking.

Description

Environment protection type magnetic power circuit breaker arc control device

Technical field

The present invention relates to a kind of SF ₆gas list voltage breaker assembly especially, is a kind of arc control device.

Background technology

SF ₆as a kind of insulating gas, have lot of advantages, it is a kind of colourless, odorless, nontoxic, non-flammable inert gas, and stable chemical performance also has excellent cooling performance.SF ₆gas issues biochemical reaction in high arc temperature effect and absorbs heat, SF ₆gas is trapped electrons under high temperature action, the action time constant of arc voltage and electric arc is reduced, therefore SF ₆the dielectric strength of gas rises very soon, makes the port isolation cut-off return to higher dielectric strength in a short period of time, has good recovery characteristics.

Use SF ₆the circuit breaker that gas is made is primarily of three kinds of structures, and two voltage breaker, single voltage breaker and magnetic vortex type circuit breaker, two voltage breaker is divided into higher-pressure region and low-pressure area, and this structure is comparatively complicated, simultaneously SF ₆gas is easy condensation when higher pressure, and therefore two voltage breaker is to be substituted gradually; Magnetic vortex type circuit breaker utilizes the effect of magnetic field Lorentz force, makes electric arc High Rotation Speed and then makes arc extinction; Single voltage breaker uses comparatively extensive, and it only has a baric systerm, carries out gas injection, and then realize arc extinguishing by the relative motion of piston-cylinder; Gas is extruded by the self-acting of pressure shield by current single voltage breaker, insufficient pressure; Current single voltage breaker is along with the minimizing of gas, and gas jet velocity can reduce, and is unfavorable for arc extinguishing; Meanwhile, along with the downslide of moving contact, electric arc is elongated, and the air pressure that ejection gas needs also needs corresponding increase, prior art implements comparatively loaded down with trivial details; In addition generate noxious substance after circuit breaker reaction, reclaim and comparatively bother.

Summary of the invention

For the problems referred to above, the invention provides a kind of environment protection type magnetic power circuit breaker arc control device, the circuit breaker using these arc control device to make can efficient arc extinguishing, and gas jet velocity is powerful, and these arc control device can reclaim noxious substance simultaneously, effectively prevents poison gas from leaking.

For solving the problem, the technical solution adopted in the present invention is: this environment protection type magnetic power circuit breaker arc control device mainly include housing, moving contact, fixed contact and arcing chamber; Be installed with fixed contact on the top of described housing, be slidably fitted with moving contact in the bottom of described housing; The axis that described fixed contact and described moving contact are positioned at housing is opposite to each other; The sidewall of described arcing chamber is cartridge type, and this sidewall is fixedly mounted on the inside of arc control device and this sidewall is coaxial with arc control device; The upper end of described arcing chamber uses a piston sheet metal in annular to seal, and described piston sheet metal can be free to slide along the inwall of the sidewall of arcing chamber and arc control device; Described piston sheet metal is connected to the top of arc control device by extension spring; The annular base with described arcing chamber form fit is installed with in the lower end of described arcing chamber; By described piston sheet metal, described sidewall and described annular base three seal in the arcing chamber that surrounds and be filled with SF ₆gas; Described fixed contact wraps up by described arcing chamber; With the end of described fixed contact for the center of circle, level on the madial wall of described arcing chamber, circumference equidistantly offers jet; Each described jet uses seals with wax; Symmetrically on the madial wall of described annular base be pasted with two in semiorbicular conducting ring, two described conducting rings do not contact; In described annular base, be placed with magnetic induction loop, the two ends of described magnetic induction loop are electrically connected two described conducting rings respectively one to one.

The invention has the beneficial effects as follows: when there are the abnormal conditions such as short circuit when circuit, fuse failure, moving contact slide downward; Now produce electric arc between moving contact and fixed contact, this electric arc produces high temperature and is melted by the wax at jet place; Along with the downslide electric arc of moving contact elongates, when moving contact skims over described conducting ring, arc transfer is between conducting ring and fixed contact, now magnetic induction loop energising, the alternating current of big current makes magnetic induction loop produce strong magnetic field, piston sheet metal adsorbs by this magnetic field, described extension spring generation elastic deformation; Described piston sheet metal is along arcing chamber sidewall slide downward and by SF ₆gas extrudes away from jet; Described jet just to the end of fixed contact, under the effect of high-intensity magnetic field, SF ₆gas sprays at a high speed, rapidly by arc extinction from jet; After arc extinguishing terminates, magnetic induction loop internal cause does not have current flowing magnetic field dissipate, and described piston sheet metal resets under the effect of extension spring, and the air pressure now in arcing chamber reduces, and in arc control device, reacted toxic gas is recycled in arcing chamber; When reclaiming circuit breaker, this circuit breaker can not cause the diffusion of toxic gas, greatly improves fail safe and the feature of environmental protection; In addition, the electric arc produced during open circuit is larger, and the magnetic field that magnetic induction loop produces is stronger, SF ₆the speed that gas sprays is faster; This structure just can only arc extinguishing according to electric arc size without the need to additional adjustment mechanism.

Because the pulling force conformal displacement of spring is from linear change, and magnetic attraction and operating distance nonlinear change, therefore when piston sheet metal is near magnetic induction loop, speed is returned and is accelerated gradually, thus ensures SF ₆gas the arc extinguishing later stage can not because gas storage reduce and build-up of pressure is not enough, SF of the present invention ₆gas can be more and more powerful in arc extinguishing process, effectively improves arc quenching effect.

As preferably, described moving contact is provided with diaphragm seal; So that fall behind under moving contact, the bottom of gas arc-extinguishing chamber is blocked, and then prevent gas leak.

As preferably, each described conducting ring is welded with in Rhizoma Sparganii ring that is semiorbicular, conduction, the seamed edge of two described Rhizoma Sparganii rings is relative; Fixed contact near-hermetic can wrap up by this structure, effectively prevents SF ₆gas leak, significantly increases arc quenching effect simultaneously.

As preferably, two anchor rings that above-mentioned Rhizoma Sparganii ring is exposed on the external make the cambered surface caved inward; So that increase air seal effect.

As preferably, described annular base also offers louvre, described louvre circumference is distributed on the lower surface of annular base; So that left fast by the heat of annular base, effectively prevent magnetic induction loop because of overheated and scaling loss.

Accompanying drawing explanation

Fig. 1 is the half section schematic diagram of the circuit breaker using this environment protection type magnetic power circuit breaker arc control device to make.

Fig. 2 is schematic top plan view embodiment illustrated in fig. 1.

Embodiment

In the embodiment shown in Fig. 1, Fig. 2, this environment protection type magnetic power circuit breaker arc control device mainly include housing 1, moving contact 3, fixed contact 2 and arcing chamber 4; Be installed with fixed contact 2 on the top of described housing 1, be slidably fitted with moving contact 3 in the bottom of described housing 1, described moving contact 3 is provided with diaphragm seal 31; The axis that described fixed contact 2 and described moving contact 3 are positioned at housing 1 is opposite to each other; The sidewall of described arcing chamber 4 is cartridge type, and this sidewall is fixedly mounted on the inside of arc control device and this sidewall is coaxial with arc control device; The upper end of described arcing chamber 4 uses a piston sheet metal 5 in annular to seal, and described piston sheet metal 5 can be free to slide along the inwall of the sidewall of arcing chamber 4 and arc control device; Described piston sheet metal 5 is connected to the top of arc control device by extension spring 51; The annular base 6 with described arcing chamber 4 form fit is installed with in the lower end of described arcing chamber 4; By described piston sheet metal 5, described sidewall and described annular base 6 three seal in the arcing chamber 4 that surrounds and be filled with SF ₆gas; Described fixed contact 2 wraps up by described arcing chamber 4; With the end of described fixed contact 2 for the center of circle, level on the madial wall of described arcing chamber 4, circumference equidistantly offers jet 41; Each described jet 41 uses and seals with wax; Symmetrically on the madial wall of described annular base 6 be pasted with two in semiorbicular conducting ring, two described conducting rings do not contact; The seamed edge each described conducting ring is welded with in Rhizoma Sparganii ring 7, two described Rhizoma Sparganii rings 7 that are semiorbicular, that conduct electricity is relative; Two anchor rings that above-mentioned Rhizoma Sparganii ring 7 is exposed on the external make the cambered surface caved inward; In described annular base 6, be placed with magnetic induction loop 61, the two ends of described magnetic induction loop 61 are electrically connected two described conducting rings respectively one to one; Described annular base 6 also offers louvre 62, and described louvre 62 circumference is distributed on the lower surface of annular base 6.

Under nature, described piston sheet metal 5 presses close to the top of arc control device under the effect of extension spring 51, SF ₆gas is sealed in arcing chamber 4; When there are the abnormal conditions such as short circuit when circuit, fuse failure, moving contact slide downward, when moving contact falls to certain altitude, moving contact blocks and fixes by diaphragm seal 31, and now arc control device are in sealing state, effectively prevent SF ₆gas leak; Now produce electric arc between moving contact and fixed contact, this electric arc produces high temperature and is melted by the wax at jet 41 place; Along with the downslide electric arc of moving contact elongates, when moving contact skims over described Rhizoma Sparganii ring 7, arc transfer is between Rhizoma Sparganii ring 7 and fixed contact, and Rhizoma Sparganii ring 7, by magnetic induction loop 61 conducting, because two conducting rings do not contact, effectively prevents conducting ring by magnetic induction loop 61 short circuit; The alternating current of big current makes magnetic induction loop 61 produce strong magnetic field, and piston sheet metal 5 adsorbs by this magnetic field, and elastic deformation occurs in described extension spring 51; Described piston sheet metal 5 is along arcing chamber 4 sidewall slide downward and by SF ₆gas extrudes away from jet 41; Described jet 41 just to the end of fixed contact, under the effect of high-intensity magnetic field, SF ₆gas sprays at a high speed, rapidly by arc extinction from jet 41; Because there is certain hysteresis quality in the magnetic field in magnetic induction loop 61 relative to electric arc, so when after arc extinction, magnetic field slightly time delay just disappears, and then ensures that electric arc is thoroughly extinguished; After arc extinguishing terminates, fade away in the magnetic field in magnetic induction loop 61, and owing to not having the effect of magnetic attraction, described piston sheet metal 5 resets under the effect of extension spring 51; Air pressure now in arcing chamber 4 reduces, and in arc control device, reacted toxic gas is recycled in arcing chamber 4; When reclaiming circuit breaker, this circuit breaker can not cause the diffusion of toxic gas, greatly improves fail safe and the feature of environmental protection.

The protruding seamed edge of 7 two, Rhizoma Sparganii ring is relative, and fixed contact near-hermetic can wrap up by this structure, effectively prevents SF ₆gas leak, significantly increases arc quenching effect simultaneously; SF, in the cambered surface caved inward, is worked as in the surface be exposed on the external due to Rhizoma Sparganii ring 7 ₆when gas blows to the cambered surface of Rhizoma Sparganii ring 7, gas is by the circle centre position in arcing back face of rebounding, and this structure can prevent SF further ₆gas leak, increases environmental protection and fail safe further.

In addition, the electric arc produced during open circuit is larger, and the magnetic field that magnetic induction loop 61 produces is stronger, SF ₆the speed that gas sprays is faster; This structure just can only arc extinguishing according to electric arc size without the need to additional adjustment mechanism.

Because the pulling force conformal displacement of spring is from linear change, and magnetic attraction and operating distance nonlinear change, therefore when piston sheet metal 5 is near magnetic induction loop 61, speed is returned and is accelerated gradually, thus ensures SF ₆gas the arc extinguishing later stage can not because gas storage reduce and build-up of pressure is not enough, SF of the present invention ₆gas can be more and more powerful in arc extinguishing process, effectively improves arc quenching effect.

The heat of annular base 6 can leave by louvre 62 fast that be opened in annular base 6 lower surface, effectively prevents magnetic induction loop 61 because of overheated and scaling loss.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. environment protection type magnetic power circuit breaker arc control device, this environment protection type magnetic power circuit breaker arc control device mainly include housing (1), moving contact (3), fixed contact (2) and arcing chamber (4); Be installed with fixed contact (2) on the top of described housing (1), be slidably fitted with moving contact (3) in the bottom of described housing (1); The axis that described fixed contact (2) and described moving contact (3) are positioned at housing (1) is opposite to each other; It is characterized in that: the sidewall of described arcing chamber (4) is cartridge type, this sidewall is fixedly mounted on the inside of arc control device and this sidewall is coaxial with arc control device; The upper end of described arcing chamber uses a piston sheet metal (5) in annular to seal, and described piston sheet metal (5) can be free to slide along the inwall of the sidewall of arcing chamber and arc control device; Described piston sheet metal (5) is connected to the top of arc control device by extension spring (51); The annular base (6) with described arcing chamber (4) form fit is installed with in the lower end of described arcing chamber; By described piston sheet metal (5), described sidewall and described annular base (6) three seal (4) in the arcing chamber that surrounds and be filled with SF ₆gas; Described fixed contact (2) wraps up by described arcing chamber (4); With the end of described fixed contact (2) for the center of circle, level on the madial wall of described arcing chamber (4), circumference equidistantly offers jet (41); The use of each described jet (41) is sealed with wax; Symmetrically on the madial wall of described annular base (6) be pasted with two in semiorbicular conducting ring, two described conducting rings do not contact; In described annular base (6), be placed with magnetic induction loop (61), the two ends of described magnetic induction loop (61) are electrically connected two described conducting rings respectively one to one.

2. environment protection type magnetic power circuit breaker arc control device according to claim 1, is characterized in that: on described moving contact (3), be provided with diaphragm seal (31).

3. environment protection type magnetic power circuit breaker arc control device according to claim 1 and 2, is characterized in that: be welded with on each described conducting ring in Rhizoma Sparganii ring (7) that is semiorbicular, conduction, the seamed edge of two described Rhizoma Sparganii rings (7) is relative.

4. environment protection type magnetic power circuit breaker arc control device according to claim 3, is characterized in that: two anchor rings that above-mentioned Rhizoma Sparganii ring (7) is exposed on the external make the cambered surface caved inward.

5. environment protection type magnetic power circuit breaker arc control device according to claim 1, it is characterized in that: on described annular base (6), also offer louvre (62), described louvre (62) circumference is distributed on the lower surface of annular base (6).