CN102376505A

CN102376505A - Contactor protecting sheet and molded case circuit breaker contactor with high breaking capacity

Info

Publication number: CN102376505A
Application number: CN201110360866XA
Authority: CN
Inventors: 王华章; 李涛; 郭强; 肖爽
Original assignee: Jiangsu Daqo Kfine Electric Co Ltd
Current assignee: Jiangsu Daquan Kaifan switch Co.,Ltd.
Priority date: 2011-11-15
Filing date: 2011-11-15
Publication date: 2012-03-14
Anticipated expiration: 2031-11-15
Also published as: CN102376505B

Abstract

The invention belongs to low-voltage switching equipment, and relates to a component structure of a molded case circuit breaker, and in particular to a contactor protecting sheet and a molded case circuit breaker contactor with high breaking capacity using the protecting sheet. The contactor protecting sheet is made of a flame-retardant insulating material with elasticity, wherein a base body of the contactor protecting sheet comprises a section of flaky root part and two wings, namely an upper wing part and a lower wing part, which are stretched towards upper side and lower side from the front end of the root part; the lower wing part is flaky; and the front end of the upper wing part is provided with clamping grooves which can be clamped on two sides of a neck part of a rotating arm of a circuit breaker movable contactor. The contactor protecting sheet has a simple structure, and is convenient to mount; and when the circuit breaker is has high short-circuit current, the contactor protecting sheet can be inserted between a movable contactor and a fixed contactor during disassembly of the contactors, so that dielectric strength in the region is enhanced, a large amount of gas is produced under burning of electric arc, the effect of arc air is enhanced, and further, the breaking capacity of the molded case circuit breaker is improved.

Description

Contact screening glass and high breaking capacity breaker of plastic casing contact

Technical field

The invention belongs to low voltage switchgear, relate to the modular construction of breaker of plastic casing, specifically is a kind of contact screening glass and the high breaking capacity breaker of plastic casing contact that uses this screening glass.

Background technology

The contact component of existing breaker of plastic casing generally includes the rotating shaft matrix, be installed in moving contact in the rotating shaft matrix, be positioned at the fixed contact of both sides before and after the rotating shaft; The front and back of moving contact are respectively the pivoted arm that stretches out the rotating shaft matrix for two sections; Fixed contact on the pivoted arm cooperates with fixed contact on the fixed contact in twos, forms two pairs of switch contacts.For example Chinese patent 200610037996.9 and 200610037997.3 has all been put down in writing the contact component with this basic structure.The contact component of this class formation has combined floodgate, separating brake and scolds out three kinds of operating states; When carrying out normal separating brake or closing operation, moving contact and rotating shaft matrix together rotate; If under "on" position, have short circuit current to pass through; Moving contact is scolded out rapidly under the electromagnetic force effect to scolding out state; To reach the effect of limiting short-circuit current; At this moment the rotating shaft matrix does not rotate, and only is that moving contact phase countershaft matrix is rotated, and Chinese patent 200610037996.9 and 200610037997.3 all has this structure of scolding out.The electric arc of scolding out the back to produce for contact adopts the mode of air-blowing and magnetic blow-out that it is moved to the arc control device direction rapidly usually, in arc control device, it is cut apart, extinguishes.But electric arc moves in the process of arc control device between driven, fixed contact, the means that electric arc do not weakened.

Summary of the invention

The present invention wants the technical solution problem to be; Provide on a kind of moving contact that is installed in traditional structure; And can scold the contact screening glass that strengthens arc quenching effect in the open procedure, improves breaking capacity and a kind of high breaking capacity breaker of plastic casing contact that this breaker of plastic casing contact screening glass has been installed at contact.

Contact screening glass of the present invention is made by the rubber-like flame-retardant insulating material; Its matrix comprises the root of one section sheet and from root front end open both wings in both sides up and down; Be respectively alar part and following alar part; Said alar part down is a sheet, and the front end of last alar part has the draw-in groove that can be connected to moving contact of breaker pivoted arm neck both sides.

The material of said screening glass is the gas exhausted material that can under the burning of electric arc, produce gas.

High breaking capacity breaker of plastic casing contact of the present invention include cylindrical profile the rotating shaft matrix, be installed in moving contact in the rotating shaft matrix, be positioned at the fixed contact with fixed contact of rotating shaft both sides, moving contact has a pair of pivoted arm that has moving contact that stretches out the rotating shaft matrix; Moving contact and rotating shaft matrix together rotate in contact combined floodgate and separating brake process, but moving contact phase countershaft matrix rotation when contact is scolded out; The both sides, front and back of rotating shaft matrix external cylindrical surface are respectively arranged with an above-mentioned contact screening glass; The last alar part of said contact screening glass is connected to the neck both sides of pivoted arm through draw-in groove; Last alar part and root abut on the external cylindrical surface of rotating shaft matrix and are positioned at the inboard of pivoted arm one side of fixed contact (promptly towards), and whole contact screening glass together moves with moving contact; Screening glass is away from the contact when moving contact is positioned at closing position, and the following alar part of screening glass stretches out and is blocked between moving contact and the fixed contact when moving contact is being scolded open position.

Be respectively arranged with outwards outstanding wedge angle before and after the said rotating shaft matrix on the external cylindrical surface of both sides; When moving contact was in combined floodgate and gate-dividing state, said wedge angle was protruding by a dead slot of opening on alar part on the contact screening glass; Moving contact is in when scolding out state, and said wedge angle leaves dead slot and is pressed in contact screening glass entity part inboard.

The present invention is simple in structure, easy for installation; In the process of its normal divide-shut brake the action of circuit breaker and characteristic etc. are had no influence, and big short circuit current is arranged when circuit breaker, the contact screening glass can insert between the sound contact when contact was scolded out; Strengthen the dielectric strength in this panel region; And under the burning of electric arc, produce a large amount of gases, strengthen effect, and then improve the breaking capacity of breaker of plastic casing the electric arc air-blowing.

Description of drawings

Fig. 1 is the structural representation of contact screening glass of the present invention;

Fig. 2 is the decomposition texture sketch map of high breaking capacity breaker of plastic casing contact of the present invention;

Fig. 3 is the installation and combination structural representation of high breaking capacity breaker of plastic casing contact of the present invention;

Fig. 4 is the structural representation of high breaking capacity breaker of plastic casing contact of the present invention at closing position;

Fig. 5 is that high breaking capacity breaker of plastic casing contact of the present invention is being scolded the structural representation of open position;

Fig. 6 is the structural representation of high breaking capacity breaker of plastic casing contact of the present invention in the separating brake position.

Embodiment

As shown in Figure 1; This contact screening glass 1 is made by the rubber-like flame-retardant insulating material; This material is the gas exhausted material that can under the burning of electric arc, produce gas; Its matrix comprises the root 11 of one section sheet and from root front end open both wings in both sides up and down, is respectively alar part 12 and following alar part 13; Said alar part 13 down is a sheet, and the front end of last alar part 12 has the draw-in groove 14 that can be connected to moving contact of breaker pivoted arm neck both sides.Also have a dead slot 15 in the stage casing of last alar part.

Like Fig. 2～shown in Figure 6; This high breaking capacity breaker of plastic casing contact include cylindrical profile rotating shaft matrix 2, be installed in moving contact 3 in the rotating shaft matrix, be positioned at the fixed contact with fixed contact 4 of rotating shaft both sides, moving contact 3 has a pair of pivoted arm 31 that has moving contact that stretches out the rotating shaft matrix; Moving contact 3 together rotates with rotating shaft matrix 2 in contact combined floodgate and separating brake process, but moving contact 3 phase countershaft matrixes rotation when contact is scolded out; The both sides, front and back of rotating shaft matrix 2 external cylindrical surfaces are respectively arranged with a contact screening glass 1; The last alar part 12 of contact screening glass 1 is connected to the neck both sides of pivoted arm 31 through draw-in groove 14; Last alar part 12 and root 11 abut on the external cylindrical surface of rotating shaft matrix and are positioned at the inboard of pivoted arm one side of fixed contact (promptly towards), and whole contact screening glass 1 together moves with moving contact 3.Contact screening glass 1 is away from contact (as shown in Figure 4) when moving contact 3 is positioned at closing position, and the following alar part 13 of contact screening glass 1 stretches out and is blocked in (as shown in Figure 5) between moving contact and the fixed contact when moving contact 3 is being scolded open position.

Be respectively arranged with outwards outstanding wedge angle 21 on the external cylindrical surface of both sides, said rotating shaft matrix 2 front and back; When moving contact is in combined floodgate and gate-dividing state (like Fig. 4 and Fig. 6), wedge angle is protruding by the dead slot of opening on alar part 12 on the contact screening glass 15; Moving contact is in when scolding out state, and wedge angle 21 leaves dead slot and is pressed in contact screening glass entity part inboard, thereby can force down alar part 13 fully to stretch out.

Claims

1. contact screening glass is characterized in that: it is made by the rubber-like flame-retardant insulating material, and its matrix comprises the root (11) of one section sheet and from root front end open both wings in both sides up and down, is respectively alar part (12) and following alar part (13); Following alar part (13) is a sheet, and the front end of last alar part (12) has draw-in groove (14).

2. contact screening glass according to claim 1 is characterized in that: its material is the gas exhausted material that can under the burning of electric arc, produce gas.

3. contact screening glass according to claim 1 is characterized in that: also have a dead slot (15) in the stage casing of last alar part.

4. high breaking capacity breaker of plastic casing contact; Include cylindrical profile rotating shaft matrix (2), be installed in moving contact (3) in the rotating shaft matrix, be positioned at the fixed contact with fixed contact (4) of rotating shaft both sides, moving contact (3) has a pair of pivoted arm (31) that has moving contact that stretches out the rotating shaft matrix; Moving contact (3) together rotates with rotating shaft matrix (2) in contact combined floodgate and separating brake process; Moving contact when contact is scolded out (3) but phase countershaft matrix (2) rotation, it is characterized in that: the both sides, front and back of rotating shaft matrix (2) external cylindrical surface are respectively arranged with a contact screening glass (1); The last alar part (12) of contact screening glass (1) is connected to the neck both sides of pivoted arm (31) through draw-in groove (14); Last alar part (12) and root (11) abut on the external cylindrical surface of rotating shaft matrix and are positioned at the inboard of pivoted arm, and whole contact screening glass (1) together moves with moving contact (3); Contact screening glass (1) is away from the contact when being positioned at closing position when moving contact (3), and the following alar part (13) that is positioned at contact screening glass (1) when scolding open position when moving contact (3) stretches out and is blocked between moving contact and the fixed contact.

5. high breaking capacity breaker of plastic casing contact according to claim 4 is characterized in that: be respectively arranged with outwards outstanding wedge angle (21) before and after the rotating shaft matrix (2) on the external cylindrical surface of both sides; When moving contact was in combined floodgate and gate-dividing state, wedge angle was protruding by the dead slot of opening on alar part (12) on the contact screening glass 15; Moving contact is in when scolding out state, and wedge angle (21) leaves dead slot and is pressed in contact screening glass entity part inboard.