CN2932611Y

CN2932611Y - Shielding and isolating breaker

Info

Publication number: CN2932611Y
Application number: CN 200620074991
Authority: CN
Inventors: 王靖; 郑改红; 胡义琴
Original assignee: Daqo Group Co Ltd
Current assignee: Daqo Group Co Ltd
Priority date: 2006-07-21
Filing date: 2006-07-21
Publication date: 2007-08-08
Anticipated expiration: 2016-07-21

Abstract

The utility model relates to a shielding isolation breaker, belonging to the electric power supply control facility technology field. The breaker comprises a static contact and a dynamic contact, wherein the middle portion of the static contacts on the two sides is arranged an isolation device which is composed of an outer shell, an expansion plate and a horizontal pushing board, wherein the outer shell is fixed on a base, the expansion plate and the shell compose a moving pair, the board surface is equipped with an expansion guiding trough, and the horizontal pushing board is provided with an expansion guiding inclined surface which extends into the expansion guiding trough. In correspondence to the contact position of the dynamic and the static contacts, the expansion guiding trough is cooperated with the narrow end of the expansion guiding inclined surface and in a constriction position which is relative to the outer shell. In correspondence to the separating position of the dynamic and the static contacts, the expansion guiding trough is cooperated with the narrow end of the expansion guiding inclined surface and in an extending position which is relative to the outer shell. The utility model uses a simple structure to realize not only isolating the cavities between the contacts on the two sides, but also shielding the electric arc between the dynamic and the static contacts in the arc extinguishing process, thereby having the function that the gas pressure is increased, facilitating the electric arc to enter into the arc extinguishing room.

Description

Shield isolated breaker

Technical field

The utility model relates to a kind of circuit breaker, and especially a kind of circuit breaker that the arc shield spacer assembly is housed belongs to supply of electric power control device technical field.

Background technology

Understand according to the applicant, existing circuit breaker comprises the fixed contact that is fixed on the pedestal both sides, the moving contact corresponding with fixed contact, does not have the arc shield device between the dynamic/static contact, but relies on arc control device to eliminate electric arc merely.Therefore, exist electric arc in time not extinguish or to extinguish after negative effect such as arcing again easily, influenced the contact electrical endurance of circuit breaker greatly.In addition, because at (if single-break circuit breaker between the breakpoint up and down, then for up and down between the outlet row) there is not a spacer assembly, the circuit breaker internal cavities is interconnected, when electric arc produces, after when gases are heated, they expand, be difficult to be drawn towards the arc control device direction, thereby cause arc extinction performance to descend according to the effect of anticipation.

The utility model content

The purpose of this utility model is: at the shortcoming of above prior art existence, propose a kind ofly can completely cut off cavity between the upper and lower contact (or upper and lower outlet row), can not hinder under the closed mutually prerequisite that contacts of dynamic and static contact again, can shield the shield isolated breaker of electric arc between the corresponding dynamic and static contact.

In order to reach above purpose, shield isolated breaker of the present utility model comprises two fixed contacts that are separately fixed at the pedestal both sides; Two moving contacts corresponding with two fixed contacts, its improvements are: between described two fixed contacts spacer assembly is housed, described spacer assembly is made of support, expansion plate and horizontal push plate; Described support is fixed on the pedestal, and described expansion plate vertically moves pair with being configured to, described horizontal push plate be configured to horizontal moving sets; The plate face of described expansion plate is shaped on flexible guiding groove, is shaped on the flexible lead-in chamfered that stretches into flexible guiding groove on the described horizontal push plate; The wide end of described lead-in chamfered is resisted against between the moving contact of both sides; Corresponding dynamic and static contact contact position, described flexible guiding groove cooperates with the narrow end of flexible lead-in chamfered, and described expansion plate is in the position of shrinking with respect to support; Corresponding dynamic and static contact disengages the position, and described flexible guiding groove cooperates with the wide end of flexible lead-in chamfered, and described expansion plate is in the position of stretching with respect to support.

Like this, owing to spacer assembly is installed between the upper and lower fixed contact, and between upper and lower moving contact, therefore can be all the time that the cavity between two fixed contacts and two moving contacts is isolated.And in the moving contact motion process, because flexible lead-in chamfered is to the promotion guiding function of flexible guiding groove on the expansion plate on the horizontal push plate, spacer assembly can force expansion plate to shrink by horizontal push plate when short-circuiting device is closed, does not influence the contact of dynamic and static contact; And when dynamic and static contact disengages, force expansion plate to stretch up and down again, between dynamic and static contact, form shielding, thereby play desirable shielding extinguishing arc effect.

This shows, the utility model is not only realized the cavity between the contact of the contact of isolated upper and lower fixed contact and upper and lower moving contact with rational structure, and do not hinder the mutual closure of dynamic and static contact to contact, in the arc extinguishing process that dynamic and static contact disengages mutually, shield its electric arc each other, and have and increase gas pressure, help the effect that electric arc enters arc control device.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the structural representation of dynamic and static contact of embodiment of the utility model when disengaging.

Structural representation when Fig. 2 is the contact of the dynamic and static contact of Fig. 1 embodiment.

Fig. 3 is the perspective view of spacer assembly among Fig. 1 embodiment.

Fig. 4 is the profile of spacer assembly among Fig. 1 embodiment.

Fig. 5 removes behind the support perspective view that push pedal up and down is in extended configuration among Fig. 4.

Fig. 6 removes the perspective view that push pedal behind the support is in contraction state among Fig. 4.

Embodiment

Embodiment one

The shield isolated breaker of present embodiment as depicted in figs. 1 and 2, pedestal of T font 8 and Shell of circuit breaker relative fixed, its upper and lower both sides are the fixing upper and lower fixed contact 3 of symmetry respectively.With two fixed contact correspondence positions be respectively link to each other with driving mechanism 9 " the upper and lower moving contact 2 of [" shape, under the drive of driving mechanism, moving contact can along continuous straight runs motion, have the open position that disengages of the closed contact position of Fig. 1 and Fig. 2 respectively.The spacer assembly 2 that is fixed on the pedestal is housed between the upper and lower fixed contact 3.

This spacer assembly is made of support 6, last expansion plate 5, following expansion plate 7 and horizontal push plate 4 as shown in Figure 3 and Figure 4.The horizontal clamping plate of support 6 are fixed on the pedestal 8, and the upper and lower expansion plate 5 and 7 that matches with it is housed in the clip slot of vertical direction, constitute each other to vertically move pair.The horizontal push plate 4 that matches with it is installed in the rectangular opening of support 6 horizontal directions, is constituted horizontal moving sets.Upper and lower expansion plate 5 and 7 plate face be shaped on respectively minor face vertically upward with downward about centrosymmetric L shaped flexible guiding groove (referring to Fig. 5, Fig. 6), the both sides of horizontal push plate 4 are shaped on the flexible lead-in chamfered that stretches into corresponding flexible guiding groove respectively, its lead-in chamfered 4A that makes progress contacts with the L shaped guiding groove edge 5A of last push pedal, and downward lead-in chamfered 4B contacts (referring to Fig. 4) with the L shaped guiding groove edge 7A of following push pedal.After the assembling, the wide end of horizontal push plate 4 lead-in chamfered is resisted against in the depression between the lower moving contact, and narrow end is resisted against (not shown) on the spring between pedestal 8 and the horizontal push plate 4.When driving mechanism 9 ordered about moving contact 1 and contacts with the closing of contact of fixed contact 3, flexible guiding groove cooperated with the narrow end of flexible lead-in chamfered, and upper and lower expansion plate 5 and 7 is in the position (Fig. 2, Fig. 6) with respect to support 6 contractions, the not contact of influencing contactor; When the moving contact disengaging disconnects with contacting of fixed contact, under the reset response of spring, flexible guiding groove cooperates with the wide end of flexible lead-in chamfered, upper and lower expansion plate 5 and 7 is in the position (Fig. 1, Fig. 5) of stretching with respect to support 6, thereby between dynamic and static contact, form shielding, play the extinguishing arc effect.

Experimental results show that, the shield isolated breaker principle science of present embodiment, rational in infrastructure, reliable in action can either shield the electric arc between dynamic/static contact in the arc extinguishing process, the cavity between completely cutting off simultaneously about the double break point again, to increase gas pressure, help electric arc to enter arc control device smoothly.

In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.

Claims

1. a shield isolated breaker comprises two fixed contacts that are separately fixed at the pedestal both sides; Two moving contacts corresponding with two fixed contacts is characterized in that: between the described fixed contact spacer assembly is housed, described spacer assembly is made of support, expansion plate and horizontal push plate; Described support is fixed on the pedestal, and described expansion plate vertically moves pair with being configured to, described horizontal push plate be configured to horizontal moving sets; The plate face of described expansion plate is shaped on flexible guiding groove, is shaped on the flexible lead-in chamfered that stretches into flexible guiding groove on the described horizontal push plate; The wide end of described lead-in chamfered is resisted against between the moving contact of both sides; Corresponding dynamic and static contact contact position, described flexible guiding groove cooperates with the narrow end of flexible lead-in chamfered, and described expansion plate is in the position of shrinking with respect to support; Corresponding dynamic and static contact disengages the position, and described flexible guiding groove cooperates with the wide end of flexible lead-in chamfered, and described expansion plate is in the position of stretching with respect to support.

2. according to the described shield isolated breaker of claim 1, it is characterized in that: the plate face of described two expansion plates is shaped on respectively about centrosymmetric L shaped flexible guiding groove, and the both sides of described horizontal push plate are shaped on the flexible lead-in chamfered that stretches into corresponding flexible guiding groove respectively.

3. according to the described shield isolated breaker of claim 2, it is characterized in that: the horizontal clamping plate of described support are fixed on the pedestal; Two expansion plates that match with it are housed in the clip slot of vertical direction, and formation vertically moves pair; The horizontal push plate that matches with it is installed in the rectangular opening of described support level direction, is constituted horizontal moving sets.

4. according to the described shield isolated breaker of claim 3, it is characterized in that: described moving contact be " [" shape, an end is connected with driving mechanism, the wide end of described horizontal push plate lead-in chamfered is resisted against in the depression of moving contact.

5. according to the described shield isolated breaker of claim 4, it is characterized in that: the narrow end of described horizontal push plate is resisted against on the spring between pedestal and the horizontal push plate.