CN109859973A

CN109859973A - Arc-extinguishing chamber of low-voltage circuit breaker

Info

Publication number: CN109859973A
Application number: CN201910210518.0A
Authority: CN
Inventors: 王克明; 徐晓初; 王庆利
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2019-06-07

Abstract

The present invention relates to Low Voltage Electrical Apparatus, more particularly to a kind of arc-extinguishing chamber of low-voltage circuit breaker, it includes left arc separating wall, right arc separating wall, arc extinguishing grid pieces group and arc striking piece, left arc separating wall includes left interconnecting piece and left department of assembly, right arc separating wall includes right interconnecting piece and right department of assembly, and arc extinguishing grid pieces group and arc striking piece are separately positioned between left department of assembly and right department of assembly；The left interconnecting piece and right interconnecting piece are limited by joinery and its construction to be cooperated, and joinery and its construction includes positive stop lug boss and limiting groove, and positive stop lug boss and limiting groove limit cooperate, and limits laterally opposed movement and vertical relative movement between left arc separating wall and right arc separating wall；Left interconnecting piece of the invention and right interconnecting piece are limited by joinery and its construction to be cooperated, limit the laterally opposed movement and vertical relative movement of left arc separating wall and right arc separating wall, the automatic alignment function of realizing left arc separating wall and right arc separating wall ensure that the precision of the two assembly and simplify assembly manipulation.

Description

Arc-extinguishing chamber of low-voltage circuit breaker

Technical field

The present invention relates to Low Voltage Electrical Apparatus, and in particular to a kind of arc-extinguishing chamber of low-voltage circuit breaker.

Background technique

Existing arc-extinguishing chamber of low-voltage circuit breaker, generally by two arc separating walls, arc extinguishing grid pieces group, arc striking piece, go out flame piece, arc extinguishing Grid, cover board and screw composition；When assembling, arc extinguishing grid pieces group and the flame piece that goes out are mounted between two arc separating walls, then at two Go out flame piece, arc-chute are assembled above arc separating wall, are finally fixed two arc separating walls with the cover board being arranged in above the two with screw Connection.

And in above-mentioned assembling process, since two arc separating walls are without automatic alignment function, it is necessary to using fixture to the two It is positioned, after installing arc extinguishing grid pieces group and arc striking piece, needs arc-chutes overturning 180 °, then go out flame piece, arc extinguishing are installed Then arc-chutes are overturn 180 ° again, could be fixed together two arc separating walls with cover board with screw by grid and cover board, grasp Make it is cumbersome and inconvenient, and repeatedly overturn arc-chutes when, be easy to occur two arc separating walls between misplace, so as to cause going out The case where arc grid group tilts, and influences the assembly precision and arc extinction performance of arc-chutes generation；Furthermore existing low-voltage circuit breaker goes out Structure is complicated for arc chamber, and components are more, and assembly efficiency is low.

Summary of the invention

It is an object of the invention to overcome the deficiencies of existing technologies, a kind of arc-extinguishing chamber of low-voltage circuit breaker, left connection are provided Portion and right interconnecting piece are limited by joinery and its construction to be cooperated, and the laterally opposed movement of left arc separating wall and right arc separating wall and vertical is limited Relative movement, realizes the automatic alignment function of left arc separating wall and right arc separating wall, ensure that the precision of the two assembly and simplification Assembly manipulation.

To achieve the above object, present invention employs following technical solutions:

A kind of arc-extinguishing chamber of low-voltage circuit breaker comprising left arc separating wall 2, right arc separating wall 8, arc extinguishing grid pieces group 3060 and arc striking piece 7, left arc separating wall 2 includes that the left interconnecting piece 2a and left department of assembly 2b with lower part at an upper portion thereof is respectively set, and right arc separating wall 8 includes point It is not disposed thereon the right interconnecting piece 8a and right department of assembly 8b of portion and lower part, arc extinguishing grid pieces group 3060 and arc striking piece 7 are respectively set Between left department of assembly 2b and right department of assembly 8b；

The left interconnecting piece 2a and right interconnecting piece 8a is limited by joinery and its construction to be cooperated, and joinery and its construction includes positive stop lug boss B1 It limits and cooperates with limiting groove G1, positive stop lug boss B1 and limiting groove G1, limit the cross between left arc separating wall 2 and right arc separating wall 8 To relative movement and vertical relative movement.

Preferably, the left interconnecting piece 2a includes the first left connecting pin 21 and the second left connection for being separately positioned on its both ends End 22, right interconnecting piece 8a includes the first right connecting pin 81 and the second right connecting pin 82 for being separately positioned on its both ends；Described first Left connecting pin 21 is cooperated by joinery and its construction and the first right connecting pin 81 limit, and the second left connecting pin 22 passes through joinery and its construction and the The two right limit of connecting pin 82 cooperations.

Preferably, the side towards right arc separating wall 8 of the described first left connecting pin 21 is equipped with limiting groove G1, the second left company The side towards right arc separating wall 8 for connecing end 22 is equipped with positive stop lug boss B1, the side towards left arc separating wall 2 of the first right connecting pin 81 Equipped with positive stop lug boss B1, the side towards left arc separating wall 2 of the second right connecting pin 82 is equipped with limiting groove G1；The positive stop lug boss B1 is the boss of T-shaped structure, and limiting groove G1 is the groove of T-shaped structure.

It preferably, further include the flame item group of going out being arranged between left interconnecting piece 2a and right interconnecting piece 8a, flame item group of going out includes From top to bottom successively the first of parallel interval setting go out flame item group, second go out flame item group and third is gone out flame item group, first goes out flame item Group go out flame item and second go out flame item group the flame item that goes out be staggered, second go out flame item group go out flame item and third is gone out flame item group The flame item that goes out is staggered.

Preferably, the described first cross section of the flame item that goes out for going out flame item group is rectangular configuration, and second goes out flame item group and third The cross section of the flame item that goes out for flame item group of going out is trapezium structure, and the short bottom edge of trapezium structure is towards the side of arc extinguishing grid pieces group 3060 To.

Preferably, described first go out flame item group the adjacent flame item that goes out between be equipped with the first gap 2080, between all first The width of gap 2080 is a, a > 0；Described second go out flame item group the adjacent flame item that goes out between be equipped with the second gap 2081, at least The width in one the second gap 2081 is c, and the width in remaining the second gap 2081 is b, b=a and c > b, and all width are the of c Two gaps 2081 are arranged at second one end for going out flame item group；The third go out flame article group the adjacent flame article that goes out between be equipped with Three gaps 2082, the width of at least one third space 2082 are e, and the width of remaining third space 2082 is d, d=a and e > d, The third space 2082 that all width are e is arranged at third and goes out one end of flame item group；All width are the second gap 2081 of c First is respectively positioned on third space 2082 that all width are e to go out below 23 the same end of flame item group.

Preferably, the flame item group of going out includes being arranged in the middle part of left interconnecting piece 2a and being integrated with the left side of formula structure to go out flame Item group 20a, and be arranged in the middle part of right interconnecting piece 8a and be integrated with the right side of formula structure and go out flame item group 80a；Go out flame on the left side Item group 20a and the right side are gone out the mutually symmetrical structure of flame item group 80a；The left side flame item group 20a that goes out includes from top to bottom successively parallel interval Flame item group 240 is gone out and a third left side is gone out flame item group 241 in go out flame item group 23, second left side of first left side being arranged, and the right side flame item group 80a that goes out includes From top to bottom successively flame item group 840 is gone out and the third right side is gone out flame item group in go out flame item group 83, second right side of first right side of parallel interval setting 841；Go out flame item group 240 and third left side flame item group 241 of going out is gone out with first right side flame respectively in go out flame item group 23, second left side of first left side 841 corresponding matching of flame item group that item group 83, second right side go out flame item group 840 and the third right side is gone out separately constitutes first and goes out flame item group, second Flame item group of going out and third are gone out flame item group.

Preferably, further include on go out flame piece 4 and under go out flame piece 5；Described second goes out flame item group and third is gone out between flame item group The first assembly cavity is formed, the flame piece 4 that above goes out is arranged in the first assembly cavity, and third is gone out shape between flame item group and arc extinguishing grid pieces group 3060 At the second assembly cavity, under the flame piece 5 that goes out be arranged in the second assembly cavity.

Preferably, the flame piece 4 that goes out on described includes the multiple row first through hole 402 being disposed thereon, and each column first through hole 402 is equal Including multiple successively spaced first through hole 402；

The flame piece 5 that goes out under described includes the second through-hole of multiple row 501 and at least one column third through-hole 502 being disposed thereon, the The internal diameter of three through-holes 502 > second through-hole 501 internal diameter, the third through-hole 502 of all column are arranged at down the one end for the flame piece 5 that goes out, And all width be c the second gap 2081 and all width be e third space 2082 corresponding with third through-hole 502 respectively set Set and be located at the two sides of third through-hole 502.

Preferably, flame piece retention bead of going out is respectively provided on one in a pair of sidewalls of first assembly cavity, above go out flame piece 4 An opposite side on be respectively provided on one the flame piece limiting groove 401 that goes out, flame piece retention bead 25 of above going out and above go out flame piece limit it is recessed The limit cooperation of slot 401；

The both ends of one side wall of second assembly cavity are respectively provided with first chamfering structure, under go out one of flame piece 5 Two vertex of side are respectively provided with second chamfering structure 503, if the side between two the second chamfering structures 503 is parallel Go out a column third through-hole 502 of flame piece 5 under, and the first chamfering structure and the limit of the second chamfering structure 503 cooperate.

Preferably, the arc extinguishing grid pieces group 3060 includes short grid group and long grid group, and short grid group and arc striking piece 7 are distinguished The two sides of long grid group are set, and short grid group includes the short grid 3 of two panels, and long grid group includes at least three length of a film grid 6；It is described The side left department of assembly 2b is equipped with multiple left grid fitting grooves 26, and the side right department of assembly 8b is equipped with multiple right grid fitting grooves 86, left Grid fitting groove 26 and right grid fitting groove 86 are arranged in a one-to-one correspondence, and an opposite side of each short grid 3 is separately positioned on one In left grid fitting groove 26 and a right grid fitting groove 86, an opposite side of each long grid 6 is separately positioned on a left grid In piece fitting groove 26 and a right grid fitting groove 86.

Preferably, a vertex of 6 upper end of long grid is equipped with long grid chamfering structure 601, for assembling long grid The upper end of the left grid fitting groove 26 of piece 6 is alternately equipped with left grid limited block 2601, and the right grid for assembling long grid 6 is assembled The upper end of slot 86 is alternately equipped with right grid limited block 8601, and left grid limited block 2601 and right grid limited block 8601 are staggeredly set Set, the long grid chamfering structure 601 of the long grid 6 of adjacent two respectively with left grid limited block 2601, right grid limited block 8601 limit cooperations.

Preferably, the left interconnecting piece 2a and right interconnecting piece 8a are assembled together, formed arc-extinguishing chamber of low-voltage circuit breaker every Arc wall top；The upper end of the short grid group is lower than the upper end of long grid group, between the upper end and arc separating wall top of short grid group Form the first air flue 10, the first air flue 10 respectively the gap between the inner space of low-voltage circuit breaker, the short grid 3 of two panels and Space between arc extinguishing grid pieces group 3060 and arc separating wall top communicates.

Preferably, the left interconnecting piece 2a and right interconnecting piece 8a are assembled together, formed arc-extinguishing chamber of low-voltage circuit breaker every Arc wall top；It is additionally provided with left arc striking sheet slot allocation 28 on the left department of assembly 2b, is additionally provided with right arc striking sheet on right department of assembly 8b Slot allocation 88, an opposite side of arc striking piece 7 are plugged on respectively in left arc striking sheet slot allocation 28 and right arc striking sheet slot allocation 88, arc striking piece 7 upper ends are lower than long grid group upper end, are equipped with the second air flue 11 between 7 upper end of arc striking piece and arc separating wall top, the second air flue 11 with The inner space of low-voltage circuit breaker communicates.

Preferably, the left interconnecting piece 2a of institute is fixedly connected with right interconnecting piece 8a by rivet or screw.

It preferably, further include the supporting element 10 being arranged between left interconnecting piece 2a and right interconnecting piece 8a；The left interconnecting piece The both ends of 2a pass through joinery and its construction respectively and the both ends limit of 10 side of supporting element cooperates, and the both ends of right interconnecting piece 8a pass through respectively The both ends of joinery and its construction and 10 other side of supporting element, which limit, to be cooperated；The joinery and its construction includes the limiting groove of mutual limit cooperation G1 and positive stop lug boss B1, limiting groove G1 are the groove of T-shaped structure, and positive stop lug boss B1 is the boss of T-shaped structure；The limit Position groove G1 includes horizontal groove G10 and vertical groove G11, and vertical groove G11 setting is in the side horizontal groove G10 and vertical recessed It is connected in the middle part of slot G11 with the one end horizontal groove G10 right angle, positive stop lug boss B1 includes horizontal ledge B10 and vertical boss B11, is erected Straight boss B11 setting is connected in the middle part of the side horizontal ledge B10 and vertical boss B11 with the one end horizontal ledge B10 right angle；It is described Joinery and its construction further includes in the second boss B2 and the second groove G2, second boss B2 and horizontal groove G10 of mutual limit cooperation Portion or horizontal ledge B10 middle part square crossing, the second groove G2 and horizontal ledge B10 or horizontal groove G10 square crossing；It is described Second boss B2 include be arranged in the first semicolumn boss B20 above horizontal groove G10 or horizontal ledge B10 and with level Groove G10 or the second semicolumn boss B21, the outer diameter > second of the first semicolumn boss B20 of horizontal ledge B10 square crossing The outer diameter of semicolumn boss B21, and the first semicolumn boss B20 and the second semicolumn boss B21 concentric；Second groove G2 include be arranged in the first semicolumn groove G20 above horizontal ledge B10 or horizontal groove G10 and with horizontal ledge B10 Or the second semicolumn groove G21 of horizontal groove G10 square crossing, the second semicolumn of internal diameter > of the first semicolumn groove G20 The internal diameter of groove G21, and the first semicolumn groove G20 and the second semicolumn groove G21 concentric.

Arc-extinguishing chamber of low-voltage circuit breaker of the invention, the left interconnecting piece 2a of left arc separating wall 2 and the right interconnecting piece of right arc separating wall 8 8a by joinery and its construction limit cooperate, realize the automatic alignment of left arc separating wall 2 and right arc separating wall 8, facilitate arc extinguishing grid pieces group and Arc striking sheet configuration is between the two, and when left arc separating wall 2 to be fixedly connected with right arc separating wall 8, it is ensured that arc extinguishing grid pieces group The corresponding fitting groove of arc extinguishing grid pieces energy proper alignment, and avoid when being fixedly connected with left arc separating wall 2 with right arc separating wall 8, two The problem of person is easy to happen dislocation, causes arc extinguishing grid pieces group deflection.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of one embodiment of arc-extinguishing chamber of low-voltage circuit breaker of the present invention；

Fig. 2 is a schematic perspective view of the left arc separating wall of the present invention；

Fig. 3 is another schematic perspective view of the left arc separating wall of the present invention；

Fig. 4 is the projection structure schematic diagram of the side of the left arc separating wall of the present invention；

Fig. 5 is the structural schematic diagram of the A-A section of Fig. 4 of the present invention；

Fig. 6 is the projection structure schematic diagram of the other side of the left arc separating wall of the present invention；

Fig. 7 is a schematic perspective view of the right arc separating wall of the present invention；

Fig. 8 is another schematic perspective view of the right arc separating wall of the present invention；

Fig. 9 is the projection structure schematic diagram of the side of the right arc separating wall of the present invention；

Figure 10 is the structural schematic diagram of the B-B section of Fig. 9 of the present invention；

Figure 11 is the projection structure schematic diagram of the other side of the right arc separating wall of the present invention；

Figure 12 is the structural schematic diagram of the short grid of the present invention；

Figure 13 is the structural schematic diagram of the long grid of the present invention

Figure 14 is the structural schematic diagram of flame piece of going out in the present invention；

Figure 15 is the structural schematic diagram of flame piece of going out under the present invention；

Figure 16 is the structural schematic diagram of rivet of the present invention；

Figure 17 be arc extinguishing grid pieces group of the present invention, arc striking piece, left arc separating wall, on go out flame piece and under the go out assembling structure of flame piece show It is intended to；

Figure 18 is the structural schematic diagram of another embodiment of arc-extinguishing chamber of low-voltage circuit breaker of the present invention；

Figure 19 is a schematic perspective view of supporting element of the present invention；

Figure 20 is another schematic perspective view of supporting element of the present invention.

Specific embodiment

Below in conjunction with the embodiment that attached drawing 1-20 is provided, the specific of arc-extinguishing chamber of low-voltage circuit breaker of the invention is further illustrated Embodiment.Arc-extinguishing chamber of low-voltage circuit breaker of the invention is not limited to the following description.

Arc-extinguishing chamber of low-voltage circuit breaker of the invention comprising left arc separating wall 2, right arc separating wall 8, arc extinguishing grid pieces group 3060 and draw Arcs 7, left arc separating wall 2 include that the left interconnecting piece 2a and left department of assembly 2b with lower part at an upper portion thereof is respectively set, and right arc separating wall 8 wraps It includes and the right interconnecting piece 8a and right department of assembly 8b with lower part at an upper portion thereof is respectively set, arc extinguishing grid pieces group 3060 and arc striking piece 7 are distinguished It is arranged between left department of assembly 2b and right department of assembly 8a；

It is one embodiment of arc-extinguishing chamber of low-voltage circuit breaker of the invention as shown in Fig. 1-17.

As shown in Figure 1, arc-extinguishing chamber of low-voltage circuit breaker of the invention comprising left arc separating wall 2, right arc separating wall 8, arc extinguishing grid pieces Group 3060 and arc striking piece 7, left arc separating wall 2 include that the left interconnecting piece 2a and left department of assembly 2b with lower part at an upper portion thereof is respectively set, Right arc separating wall 8 includes that the right interconnecting piece 8a and right department of assembly 8b with lower part at an upper portion thereof, 3060 He of arc extinguishing grid pieces group is respectively set Arc striking piece 7 is separately positioned between left department of assembly 2b and right department of assembly 8b, and left interconnecting piece 2a and right interconnecting piece 8a pass through Tenon knot Structure limit cooperation, joinery and its construction include positive stop lug boss B1 and limiting groove G1, and positive stop lug boss B1 and limiting groove G1 limit cooperate, Limit the laterally opposed movement and vertical relative movement between left arc separating wall 2 and right arc separating wall 8.Specifically, square as shown in Figure 1 To the left arc separating wall 2 is located at left side, and left interconnecting piece 2a is arranged on the upside of left department of assembly 2b, and the two is an integral structure； The right arc separating wall 8 is located at right side, and right interconnecting piece 8a is arranged on the upside of right department of assembly 8b, and the two is an integral structure；Institute It states arc extinguishing grid pieces group 3060 and arc striking piece 7 is separately positioned between left department of assembly 2b and right department of assembly 8b, and be located at left interconnecting piece The lower section of 2a and right interconnecting piece 8a.

Preferably, as shown in Fig. 2-4,7-9, the left interconnecting piece 2 includes the first left connection for being separately positioned on its both ends End 21 and the second left connecting pin 22, right interconnecting piece 81 include the first right connecting pin 81 and the second right company for being separately positioned on its both ends Connect end 82；The first left connecting pin 21 is cooperated by joinery and its construction and the first right limit of connecting pin 81, the second left connecting pin 22 Cooperated by joinery and its construction and the second right limit of connecting pin 82.Further, as shown in Fig. 2-4,7-9, the first left connection The side towards right arc separating wall 8 at end 21 is equipped with limiting groove G1, and the side towards right arc separating wall 8 of the second left connecting pin 22 is set There is positive stop lug boss B1, the side towards left arc separating wall 21 of the first right connecting pin 81 is equipped with positive stop lug boss B1, the second right connecting pin 82 side towards left arc separating wall 2 is equipped with limiting groove G1；The positive stop lug boss B1 is the boss of T-shaped structure, the limit Position groove G1 is the groove of T-shaped structure.Specifically, direction as shown in Figure 1, disconnected for low pressure with the upper and lower, left and right side of Fig. 1 The upper and lower, left and right side of road device arc-chutes, the side with Fig. 1 towards reader is the front side of arc-extinguishing chamber of low-voltage circuit breaker, described the The positive stop lug boss B1 of the right connecting pin 81 limiting groove G1 and first of one left connecting pin 21 forms a joinery and its construction, the second left company The limiting groove G1 for connecing the right connecting pin 82 positive stop lug boss B1 and second at end 22 forms a joinery and its construction, is left interconnecting piece The both ends of 2a respectively pass through a joinery and its construction and are connected with the limit of the both ends of right interconnecting piece 8a, limit left arc separating wall 2 and right arc separating wall 8 Between relative movement up and down and front and back relative movement.

It should be pointed out that the joinery and its construction between the left interconnecting piece 2a and right interconnecting piece 8a can also be otherwise Be configured, for example, left interconnecting piece 2a the first left connecting pin 21 and the second left connecting pin 22 the side towards right arc separating wall 8 Be respectively provided with limiting groove G1, and the first of right interconnecting piece 8a the right connecting pin 81 and the second right connecting pin 82 towards left arc separating wall 2 Side be respectively provided with positive stop lug boss B1；Alternatively, left interconnecting piece 2a the first left connecting pin 21 and the second left connecting pin 22 towards The side of right arc separating wall 8 is respectively provided with positive stop lug boss B1, and the first of right interconnecting piece 8a the right connecting pin 81 and the second right connecting pin 82 The side towards left arc separating wall 2 be respectively provided with limiting groove G1；Certainly, there is also other versions, herein no longer one by one It repeats.Further, the positive stop lug boss B1 is also not limited to the boss of T-shaped structure, and limiting groove G1 is also not limited to T The groove of character form structure, as long as the limit of positive stop lug boss B1 and limiting groove G1 cooperate, can limit done arc separating wall 2 and it is right every Laterally opposed movement and vertical relative movement between arc wall 8, for example, positive stop lug boss B1 can be cylindrical end tangs, and limit Position groove G1 can be round hole；Certainly, there is also other a variety of versions, this is no longer going to repeat them.

Preferably, as shown in figure 3, the limiting groove G1 includes horizontal groove G10 and vertical groove G11, vertical groove G11 setting is connected in the middle part of the side horizontal groove G10 and vertical groove G11 with the one end horizontal groove G10；The positive stop lug boss B1 Including horizontal ledge B10 and vertical boss B11, vertical boss B11 is arranged in the side horizontal ledge B10 and vertical boss B11 Portion is connected with one end of horizontal ledge B10.Further, the vertical groove G11 and vertical boss B11 are set close to arc extinguishing item group It sets.

Preferably, as shown in Fig. 1,4,9, arc-extinguishing chamber of low-voltage circuit breaker of the invention further includes being arranged in left interconnecting piece 2a Flame item group of going out between right interconnecting piece 8a, flame item group of going out include that from top to bottom successively multiple groups disposed in parallel are gone out flame item.Such as Fig. 4 It is shown, flame item group of going out include from top to bottom successively disposed in parallel first go out flame item group, second go out flame item group and third is gone out flame item Group, first go out flame item group go out flame item and second go out flame item group the flame item that goes out be staggered, second go out flame item group go out flame item and The go out flame item that goes out of flame item group of third is staggered.Preferably, as shown in Fig. 1,4,9, the described first flame item that goes out for going out flame item group Cross section is rectangular configuration, and second goes out flame item group and the go out cross section of the flame item that goes out of flame item group of third is trapezium structure, trapezoidal Towards the direction of arc extinguishing grid pieces group 3060, trapezium structure is preferably isosceles trapezoidal structure on the short bottom edge of structure.Preferably, described One go out flame item group the adjacent flame item that goes out between be equipped with the first gap 2080, the width in all first gaps 2080 is a, a > 0； Described second go out flame item group the adjacent flame item that goes out between be equipped with the second gap 2081, the width at least one the second gap 2081 For c, the width in remaining the second gap 2081 is b, b=a and c > b, and described to have width be that the second gap 2081 of c is arranged at the Two one end for going out flame item group；The third go out flame item group the adjacent flame item that goes out between be equipped with third space 2082, at least one The width of third space 2082 is e, the width of remaining third space 2082 is d, d=a and e > d, and described to have width be the third of e Gap 2082 is arranged at third and goes out one end of flame item group；It is described that have the second gap 2081 that width is c and all width be e's Third space 2082 is respectively positioned on first and goes out below flame item group the same end.

For flame item group of going out of the invention with numerous embodiments, one of preferred embodiment is as follows:

As shown in figs. 1-11, the flame item group of going out includes being arranged in the middle part of left interconnecting piece 2a and being integrated with formula structure Go out flame item group 20a on a left side, and is arranged in the middle part of right interconnecting piece 8a and is integrated with the right side of formula structure and go out flame item group 80a；It is described The mutually symmetrical structure of flame item group 80a that flame item group 20a is gone out on a left side and the right side is gone out；Flame item group 20a go out including from top to bottom successively putting down in the left side The flame item group 23, second of going out of the first of row setting goes out flame item group 240 and third is gone out flame item group 241, and the right side flame item group 80a that goes out includes by upper Successively first right side disposed in parallel flame item group 83, second of going out goes out flame item group 840 and third is gone out flame item group 841 under and；Described first Go out flame item group 240 and third left side flame item group 241 of going out is gone out with first right side flame item group 83, second respectively in go out flame item group 23, second left side of a left side 841 corresponding matching of flame item group that flame item group 840 is gone out on the right side and third is gone out, separately constitute first go out flame article group, second go out flame article group and Three go out flame item group.Specifically, first left side is gone out, the flame one end of going out of every of flame item group 23 is connected with left interconnecting piece 2a, first Go out every flame one end of going out of flame item group 83 of the right side is connected with right interconnecting piece 8a, and first left side is gone out the flame free end of going out of flame item group 23 The free end in contact of flame item of going out for flame item group 83 of going out respectively with second right side is connected；Go out the every flame that goes out of flame item group 240 on second left side One end is connected with left interconnecting piece 2a, and go out every flame one end of going out of flame item group 840 of second right side is connected with right interconnecting piece 8a, Go out go out respectively with the second free end in contact of flame item of going out of flame item group 840 of flame free end of going out of flame item group 240 of second left side is connected；Institute It states go out every flame one end of going out of flame item group 241 of a third left side to be connected with left interconnecting piece 2a, the third right side is gone out every of flame item group 841 Flame one end of going out is connected with right interconnecting piece 8a, and the go out flame free end of going out of flame item group 241 of a third left side is gone out with third flame item respectively The free end in contact of flame item of going out of group 841 is connected.

Flame item group of going out of the invention, the left side flame item group 20a that goes out are an integral structure with left arc separating wall 2, and go out flame item group 80a on the right side With 8 integral structures of right arc separating wall, assembly is easy, and under the premise of guaranteeing arc quenching effect, reduces manufacturing cost, and Assembly manipulation is simplified, assembly efficiency is improved.

The mutually symmetrical structure of flame item group 80a that flame item group 20a is gone out on the left side and the right side is gone out, the flame item group that will be gone out below with left side 20a are Example is illustrated the left structure for going out the flame item group 20a and right flame item group 80a that goes out:

As in Figure 2-4, a left side is equipped in the middle part of the left interconnecting piece 2 of the left arc separating wall 2 to go out flame item group 20a, a left side is gone out flame item group 20a includes that from top to bottom successively first left side disposed in parallel flame item group 23, second of going out goes out flame item group 240 and third is gone out flame item group 241。

As shown in figure 4, first left side is gone out, a plurality of go out flame item and second left side for flame item group 23 a plurality of of flame item group 240 of going out is gone out Flame item is staggered, and is, and the go out every flame item that goes out of flame item group 23 of first left side is arranged at second and goes out adjacent the two of flame item group 240 Item goes out upside between flame item, and second left side a plurality of of flame item group 240 of going out goes out flame item and a third left side is gone out a plurality of flame item that goes out of flame item group 241 It is staggered, is, the go out every flame item that goes out of flame item group 240 of second left side is arranged at third and goes out adjacent two of flame item group 241 It goes out upside between flame item.

Go out go out flame item of the flame item group 23 including the setting of a plurality of parallel interval on first left side, and the cross section of the every flame item that goes out is equal For rectangular configuration, and the first gap 2080 is equipped between the adjacent two flame items that go out, the width in the first gap 2080 is a, a > 0. Further, 8mm≤a≤16mm.Further, a=10mm.

Go out go out flame item of the flame item group 240 including the setting of a plurality of parallel interval on second left side, the cross section of the every flame item that goes out It is isosceles trapezoidal structure, the short bottom edge of isosceles trapezoid is towards the direction of arc extinguishing grid pieces group 3060, between the adjacent two flame items that go out It is equipped with the second gap 2081, the width at least one the second gap 2081 is c, and the width in remaining the second gap 2081 is b, b =a and c > b, described to have width be that the second gap 2081 of c is arranged at second left side and goes out one end of flame item group 240.Further, 1.2b≤c≤1.5b.Further, c=1.2b.

Go out go out flame item of the flame item group 241 including the setting of a plurality of parallel interval on the third left side, the cross section of the every flame item that goes out It is isosceles trapezoidal structure, the short bottom edge of isosceles trapezoid is towards the direction of arc extinguishing grid pieces group 3060, between the adjacent two flame items that go out It is equipped with third space 2082, the width of at least one third space 2082 is e, and the width of remaining third space 2082 is d, d =a and e > d, described to have width be that the third space 2082 of e is arranged at a third left side and goes out one end of flame item group 241.Further, 1.2d≤e≤1.5d.Further, e=1.2d.

As shown in figure 4, between the third that second gap 2081 and all width that all width are c are e Gap 2082 is respectively positioned on first and goes out below 23 the same end of flame item group.Specifically, direction as shown in Figure 4, all width are the described of c Second gap 2081 and all width are that the third space 2082 of e is respectively positioned on first and goes out below 23 right end of flame item group.

Left arc separating wall 2 and right arc separating wall 8 of the invention, the difference of the two are only that: the first left connecting pin 21 towards The side of first right connecting pin 81 is equipped with positive stop lug boss B1 or limiting groove G1, and the first right connecting pin 81 is towards the first left connection The side at end 21 is equipped with limiting groove G1 or positive stop lug boss B1；The second left connecting pin 22 towards the second right connecting pin 82 one Side is equipped with limiting groove G1 or positive stop lug boss B1, and the second right connecting pin 82 is equipped with limit towards the side of the second left connecting pin 22 Boss B1 or limiting groove G1.In addition to above-mentioned difference, the left arc separating wall 2 and the substantially mutually symmetrical structure of right arc separating wall 8, because This will say the structure of left arc separating wall 2 and right arc separating wall 8 by taking left arc separating wall 2 as an example below for brief and concise purpose It is bright.

It as shown in figures 2-6, is one embodiment of the left arc separating wall 2 of the present invention.

The left arc separating wall 2 includes left interconnecting piece 2a and left department of assembly 2b, and left department of assembly 2b is arranged at left interconnecting piece 2a It side and is secured to be connected.The left interconnecting piece 2a includes the first left connecting pin 21 and the second left company for being separately positioned on its both ends End 22 is connect, and the U-shaped groove 2a0 in the middle part of left interconnecting piece 2a is set；It goes out flame item group on go out flame item group 23, second left side of first left side 240 and third left side flame item group 241 respectively from the bottom wall 2a1 of U-shaped groove 2a0 to the opening direction of U-shaped groove 2a0 extend, and Three's setting spaced in parallel to each other, U-shaped groove 2a0 further include be separately positioned on the both ends bottom wall 2a1 distinguish it is perpendicular connected The first side wall 2a2 and second sidewall 2a3, the first side wall 2a2 are arranged close to the first left connecting pin 21, and second sidewall 2a3 is close to the Two left connecting pins 22 are arranged, and the flame piece positive stop lug boss 25 that goes out on left side is arranged on bottom wall 2a1, go out flame item group 240 positioned at second left side And a third left side is gone out between flame item group 241, and close to the first side wall 2a2, left side chamfering structure 27 is arranged in bottom wall 2a0 and second side The junction of wall 2a3 and be located at a third left side go out between flame item group 241 and arc extinguishing grid pieces group 3060；As in Figure 2-4, the left dress The side towards right arc separating wall 8 with portion 2b is equipped with multiple left grid fitting grooves 26, wherein being located at the two of the left end left department of assembly 2b A left grid fitting groove 26 is equipped with left arc striking sheet slot allocation 28 on the right side of multiple left grid fitting grooves 26 for assembling short grid 3.

As best shown in figures 1 and 17, arc-extinguishing chamber of low-voltage circuit breaker of the invention further include on go out flame piece 4 and under go out flame piece 5；It is described First goes out flame item group and third goes out and forms the first assembly cavity between flame item group, and the flame piece 4 that above goes out is arranged in the first assembly cavity 4, the Three, which go out, forms the second assembly cavity between flame item group and arc extinguishing grid pieces group 3060, under go out flame piece 5 be arranged in the second assembly cavity.

Preferably, as shown in figure 14, the flame piece 4 that goes out on described includes the multiple row first through hole 402 being disposed thereon, each column the One through-hole 402 includes multiple successively spaced first through hole 402.Further, the flame piece 4 that goes out on described includes at least 3 Column first through hole 402, the diameter of first through hole 402 is between 2mm-5mm, it is preferred that the diameter of first through hole 402 is 2.5mm.

Preferably, flame piece retention bead of going out is respectively provided on one in a pair of sidewalls of first assembly cavity, above go out flame piece 4 An opposite side on be respectively provided on one the flame piece limiting groove 401 that goes out, flame piece retention bead of above going out and above go out flame piece limiting groove 401 limit cooperations.Specifically, such as Fig. 2,4,5,7,9,10, it is described on the flame piece positive stop lug boss that goes out include being arranged in left interconnecting piece 2a On left side on go out the flame piece positive stop lug boss 85 that goes out on flame piece positive stop lug boss 25 and the right side that is arranged on right interconnecting piece 8a.

Specifically, as shown in figure 14, for the one embodiment for the flame piece 4 that goes out in the present invention.

As shown in figure 14, the flame piece 4 that goes out on described is Rectangular Plate Structure comprising is successively arranged side by side from left to right on it 11 column first through hole 402, it is preferred that the diameter of first through hole 402 is 2.5mm, each on two sides up and down for the flame piece 4 that above goes out Equipped with the flame piece limiting groove 401 that goes out on one, the flame piece limiting groove 401 that goes out on two is close to go out the left end setting of flame piece 4.

Preferably, as shown in figure 15, the flame piece 5 that goes out under described includes the second through-hole of multiple row 501 being disposed thereon and at least One column third through-hole 502, the internal diameter of the second through-hole of internal diameter > 501 of third through-hole 502, the third through-hole 502 of all column are all provided with Set the one end for the flame piece 5 that goes out under, and all width be c the second gap 2081 and all width be e third space 2081 divide The two sides of third through-hole 502 are not correspondingly arranged and are separately positioned on third through-hole 502.Preferably, second through-hole 501 Diameter is between 2-5mm, preferably 3mm；The diameter of the third through-hole 502 is between 3-8mm, preferably 4mm.

Preferably, the both ends of a side wall of second assembly cavity are respectively provided with first chamfering structure, under go out flame piece 5 Two vertex of a side be respectively provided with second chamfering structure 503, if there are two the sides of the second chamfering structure 503 It is parallel to down a column third through-hole 502 of the flame piece that goes out, the first chamfering structure and the limit of the second chamfering structure 503 cooperate, can prevent Under the flame piece 5 that goes out occurred by anti-loaded situation, guarantee that third through-hole 502 is located in the second gap 2081 and width that width is c Between the third space 2082 of e.Specifically, first chamfering structure includes that setting exists as shown in Fig. 2,4,5,7,9,10 Left side chamfering structure 27 on left interconnecting piece 2a and the right side chamfering structure 87 being arranged on right interconnecting piece 8a.

Specifically, as shown in figure 15, for the one embodiment for the flame piece 5 that goes out under the present invention.

As shown in figure 15, the flame piece 5 that goes out under described is Rectangular Plate Structure comprising 8 column the second through-holes 501 and 3 column thirds are logical Hole 502, the diameter of the second through-hole 501 are 3mm, and the diameter of third through-hole 502 is 4mm, and 3 column third through-holes 502 are disposed side by side on Under go out the right end of flame piece 5,8 the second through-holes of column 501 are disposed side by side on the left side of 3 column third through-holes 502, under go out 5 right end of flame piece Two vertex are respectively provided with second chamfering structure 503, and the internal diameter of third through-hole 502 is 4mm.

Preferably, go out on described flame piece 4 and under the flame piece 5 that goes out be all made of gas exhausted material and be made, such as melamine plate, PA66 With red steel cardboard etc..

Of the invention flame item group of going out, on go out flame piece and under go out the mutual cooperation of flame piece, at least realize following technical effect: 1, First go out flame item group, second go out flame item group and the go out flame item that goes out of flame item group of third is staggered, form labyrinth structure, and first The cross section of the flame item that goes out for flame item group of going out be rectangular configuration, second go out flame item group and point off flame item group the flame sliver transvers section that goes out be Waist trapezium structure is conducive to the contact area for increasing go out flame item group and arc ions, is quickly cooled down electric arc, has reached and quickly put out The purpose of arc；2, third space 2082 that width is c the second gap 2081, width are e and under go out the third through-hole of flame piece 502, be conducive to balance arc extinguishing chamber internal pressure, convenient for the discharge of arc-chutes internal gas；3, go out on described flame piece 4 and under go out Flame piece 5 is all made of gas exhausted material and is made, go out in electric arc calcination flame piece 4 and under the flame piece 5 that goes out both make to generate gas, be quickly cooled down Electric arc, to realize the purpose of quick blow-out.

Arc extinguishing grid pieces group 3060 of the invention includes multiple arc extinguishing grid pieces.The preferred embodiment as shown in Fig. 1,12 and 13, Arc extinguishing grid pieces group 3060 of the invention includes short grid group and long grid group, and short grid group and arc striking piece 7 are separately positioned on long grid The two sides of piece group, short grid group include the short grid 3 of two panels, long grid group include at least three length of a film grid 6；The left department of assembly 2b Side is equipped with multiple left grid fitting grooves 26, and the side right department of assembly 8b is equipped with multiple right grid fitting grooves 86, left grid fitting groove 26 and right grid fitting groove 86 be arranged in a one-to-one correspondence, an opposite side of each short grid 3 is separately positioned on a left grid assembly In slot 26 and a right grid fitting groove 86, an opposite side of each long grid 6 is separately positioned on a left grid fitting groove 26 In a right grid fitting groove 86.

Preferably, as shown in figure 13, a vertex of 6 upper end of long grid is equipped with long grid chamfering structure 601；Such as Shown in Fig. 2,4,7,9, it alternately is equipped with left grid limited block 2601 for assembling the upper end of left grid fitting groove 26 of long grid 6, Upper end for assembling the right grid fitting groove 86 of long grid 6 is alternately equipped with right grid limited block 8601, left grid limited block 2601 and right grid limited block 8601 be staggered；The long grid chamfering structure 601 respectively with left grid limited block 2601, right The limit cooperation of grid limited block 8601.Specifically, as shown in Figures 2 and 4, it is all for assembling the left grid fitting groove of long grid 6 26, often in two adjacent left grid fitting grooves 26, there is left 26 top of grid fitting groove to be equipped with long grid limited block 2601； As shown in figures 7 and 9, all for assembling the right grid fitting groove 86 of long grid 6, per two adjacent right grid fitting grooves 86 In, there is right 86 top of grid fitting groove to be equipped with right grid limited block 8601；If left 26 top of grid fitting groove is equipped with Long grid limited block 2601, then the top of right grid fitting groove 86 corresponding with the left grid fitting groove 26 is not provided with right grid and limits Position block 8601；If right grid limited block 8601 is arranged in right 86 top of grid fitting groove, right with the right grid fitting groove 86 The top for the left grid fitting groove 26 answered is not provided with left grid limited block；As shown in figure 13,6 lower end of long grid is equipped with V word Two sides of shape opening, v-shaped openings are extended with unsymmetric form to two sides, when left arc separating wall 2 is set in the long assembly of grid 6 of multi-disc When between right arc separating wall 8, the long grid chamfering structure 601 of the long grid 6 of adjacent two respectively with left grid limited block 2601, The right limit of grid limited block 8601 cooperation, makes adjacent long grid 6 be assemblied in left arc separating wall 2 and right arc separating wall in a reverse direction Between 8, so that the V-shaped structure of the long grid 6 of multi-disc be made to be staggered, significantly reduces electric arc and enter arc extinguishing grid pieces group 3060 Resistance.

Preferably, as best shown in figures 1 and 17, the left interconnecting piece 2a and right interconnecting piece 8a are assembled together, and it is disconnected to form low pressure The arc separating wall top of road device arc-chutes；The big very short upper end lower than long grid group of the short grid group, the upper end of short grid group Form the first air flue 10 between arc separating wall top, the first air flue 10 respectively with the inner space of low-voltage circuit breaker, the short grid of two panels The space between gap and arc extinguishing grid pieces group 3060 and arc separating wall top between piece 3 communicates so that the pedestal of breaker with Air-flow between short grid 3 and between the short grid 3 of two panels rapidly enters cooling in arc-chutes by the first air flue 10, favorably In the arc extinction performance for improving arc-extinguishing chamber of low-voltage circuit breaker of the present invention, arc extinguishing speed is improved.Specifically, as shown in figure 17, it is described short Grid group includes the short grid 3 of two panels, and the left side of long grid group, every short grid 3, with corresponding left grid fitting groove 26 is arranged in There is certain distance between the top of right grid fitting groove 86, keeps formation first between short grid group and arc separating wall top logical Road 10, first passage 10 be connected to space (exterior space that is to say arc-chutes) on the left of short grid group, the short grid 3 of two panels it Between gap and arc-chutes top space (that is to say by the right side go out flame item group, on go out flame piece 4 and under go out the use that flame piece 5 forms In cooling and extinguishing electric arc space).

Preferably, as best shown in figures 1 and 17, the left interconnecting piece 2a and right interconnecting piece 8a are assembled together, and it is disconnected to form low pressure The arc separating wall top of road device arc-chutes；It is additionally provided with left arc striking sheet slot allocation 28 on the left department of assembly 2b, is gone back on right department of assembly 8b Equipped with right arc striking sheet slot allocation 88, a pair of sidewalls of arc striking piece 7 is dutiful not to be plugged on left arc striking sheet slot allocation 28 and right arc striking piece In fitting groove 88,7 upper end of arc striking piece is lower than long grid group upper end, and the second gas is equipped between 7 upper end of arc striking piece and arc separating wall top Road 11, the second air flue 11 are communicated with the inner space of low-voltage circuit breaker, convenient for inside balance arc-extinguishing chamber of low-voltage circuit breaker and breaking The pressure of device inner space places the gas shock that arc striking piece 7 is broken electric current generation, causes left arc striking sheet slot allocation 28 and the right side The damage of arc striking sheet slot allocation 88 is conducive to extend the service life of arc-extinguishing chamber of low-voltage circuit breaker of the present invention.Specifically, such as Figure 17 Shown, the upper end of the arc striking piece 7 exists with the top of left arc striking sheet slot allocation 28 and right arc striking sheet slot allocation 88 certain respectively Distance forms the second air flue 11 between 7 upper end of arc striking piece made and arc separating wall top, to be connected to 7 left and right sides of arc striking piece Space, be the inner space of arc-chutes on the left of arc striking piece 7, (similarly go out on the right side of arc striking piece 7 for the inner space of breaker The exterior space of arc chamber).

As shown in Figure 1, the left interconnecting piece 2a of left arc separating wall 2 of the invention and the right interconnecting piece 8a of right arc separating wall 8 pass through riveting Nail or screw are fixedly connected.Preferably, the left interconnecting piece 2a is fixedly connected with right interconnecting piece 8a by rivet 1.

Preferably, as shown in figs. 1-11, the top of the left interconnecting piece 2a and right interconnecting piece 8a is respectively provided with four rivets and connects Hole 289 is connect, left interconnecting piece 2a and right interconnecting piece 8a are fixed together by four rivets 1 by four groups of rivet interlacement holes 289, Assembly efficiency is improved, number of parts is decreased, has saved manufacturing cost.When connection, the manufactured head 101 of the rivet 1 In the counterbore of the side left interconnecting piece 2a, the rivet bar 102 of rivet 1 sequentially pass through left interconnecting piece 2a and right interconnecting piece 8a with Riveting pad 9 is connected, and the side left interconnecting piece 8a is equipped with the counterbore for accommodating riveting pad.

It as depicted in figures 18-20, is another embodiment of arc-extinguishing chamber of low-voltage circuit breaker of the present invention.

The arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment and the difference of above-described embodiment are: it further include supporting element 10, branch Support member 10 is arranged between the left interconnecting piece 2a of left arc separating wall 2 and the right interconnecting piece 8a of right arc separating wall 8；The left interconnecting piece 2a is logical The side limit for crossing joinery and its construction and supporting element 10 cooperates, and right interconnecting piece 8a passes through another lateral confinement of joinery and its construction and supporting element 10 Position cooperation, joinery and its construction include positive stop lug boss B1 and limiting groove G1, and positive stop lug boss B1 and limiting groove G1 limit cooperate, limitation Laterally opposed movement between left arc separating wall 2 and supporting element 10 and vertical corresponding, and limit right arc separating wall 8 and supporting element 10 it Between laterally opposed movement and vertical relative movement.Specifically, as shown in figure 18, the both ends of the left interconnecting piece 2a pass through respectively The both ends of joinery and its construction and 10 side of supporting element, which limit, to be cooperated, and the both ends of right interconnecting piece 8a pass through joinery and its construction and supporting element respectively The both ends of 10 other sides limit cooperation.

Preferably, the left interconnecting piece 2a includes the first left connecting pin 21 and the second left connection for being separately positioned on its both ends End 22, right interconnecting piece 8a includes the first right connecting pin 81 and the second right connecting pin 82 for being separately positioned on its both ends, supporting element 10 The first supporting element connecting pin 101 and the second supporting element connecting pin 102 including being separately positioned on its both ends, the first left connecting pin 21, the first right connecting pin 81 is cooperated by joinery and its construction and the limit of 101 two sides of the first supporting element connecting pin respectively, the second left connection It holds the 22, second right connecting pin 82 to limit by the two sides of joinery and its construction and the second supporting element connecting pin 102 respectively to cooperate.

Preferably, the side towards supporting element 10 of the described first left connecting pin 21 is equipped with limiting groove G1, the second left company The side towards supporting element 10 for connecing end 22 is equipped with positive stop lug boss B1, the first supporting element connecting pin 101 towards left arc separating wall 2 Side is equipped with positive stop lug boss B1, and the side towards left arc separating wall 2 of the second supporting element connecting pin 102 is equipped with limiting groove G1, the The side towards supporting element 10 of one right connecting pin 81 is equipped with positive stop lug boss B1, the second right connecting pin 82 towards supporting element 10 Side is equipped with limiting groove G1, and the side towards right arc separating wall 8 of the first supporting element connecting pin 102 is equipped with limiting groove G1, the The side towards right arc separating wall 8 of two supporting element connecting pins 102 is equipped with positive stop lug boss B1；The positive stop lug boss B1 is T-shaped knot The boss of structure, limiting groove G1 are the groove of T-shaped structure.Certainly, as a kind of deformation, it is also possible to the first left connecting pin 21 It is respectively provided with limiting groove G1 or positive stop lug boss B1 with the side towards supporting element 10 of the second left connecting pin 22, the first supporting element connects It connects end 101 and the second supporting element connecting pin 102 and is respectively provided with positive stop lug boss B1 or limiting groove G1 towards the side of left arc separating wall 2, The side towards supporting element 10 of first right connecting pin 81 and the second right connecting pin 82 is respectively provided with positive stop lug boss B1 or limiting groove It is recessed that the side towards right arc separating wall 8 of G1, the first supporting element connecting pin 101 and the second supporting element connecting pin 102 is respectively provided with limit Slot G1 or positive stop lug boss B1.

Preferably, the limiting groove G1 is the groove of T-shaped structure comprising horizontal groove G10 and vertical groove G11, vertical groove G11 are arranged in the middle part of the side horizontal groove G10 and vertical groove G11 and the one end horizontal groove G10 right angle phase Even；The positive stop lug boss B1 is the boss of T-shaped structure comprising horizontal ledge B10 and vertical boss B11, vertical boss B11 It is arranged in the middle part of the side of horizontal ledge B10 and vertical boss B11 and is connected with one end right angle of horizontal ledge B10.Further, The joinery and its construction further includes second boss B2 and the second groove G2, in the middle part of second boss B2 and horizontal groove G10 or horizontal convex Square crossing in the middle part of platform B10, the second groove G2 and horizontal ledge B10 or horizontal groove G10 middle part square crossing.Further , the second boss B2 include be arranged in the first semicolumn boss B20 above horizontal groove G10 or horizontal ledge B10 with And it is outer with horizontal groove G10 or the second semicircle boss B21, the first semicolumn boss B20 of horizontal ledge B10 square crossing Diameter is greater than the outer diameter of the second semicolumn boss B21, and the first semicolumn boss B20 and the second semicolumn boss B21 concentric；Institute Stating the second groove G2 includes the first semicolumn groove G20 and and the water being arranged in above horizontal ledge B10 or horizontal groove G10 The internal diameter > of plano-convex platform B10 or the second semicolumn groove G21, the first semicolumn groove G20 of horizontal groove G10 square crossing The internal diameter of two semicolumn groove G21, and the first semicolumn groove G20 and the second semicolumn groove G21 concentric.

Specifically, as depicted in figures 18-20, one towards supporting element 10 of the first left connecting pin 21 of the left interconnecting piece 2a Side is equipped with limiting groove G1 and the first groove G2, the first semicolumn groove G20 of the first groove G2 and is located at the water of limiting groove G1 Above flat grooves G10, the horizontal groove G10 square crossing of the second semicolumn groove G21 and limiting groove G1 of the first groove G2； The side towards supporting element 10 of the second left connecting pin 22 of the left interconnecting piece 2a is equipped with positive stop lug boss B1 and the second groove G2, The first semicolumn groove G20 of second groove G2 is located at the top of the horizontal ledge B10 of positive stop lug boss B1, second groove G2's Second semicolumn groove 20 and horizontal ledge B10 square crossing；First supporting element connecting pin 101 of the supporting element 10 is towards The side of one left connecting pin 21 is equipped with positive stop lug boss B1 and second boss B2, the first semicolumn boss B20 of second boss B2 Above the horizontal ledge B10 of positive stop lug boss B1, the level of the second semicolumn boss B21 and positive stop lug boss B1 of second boss B2 Boss B10 square crossing；The side towards the second left connecting pin 22 of second supporting element connecting pin 102 of the supporting element 10 is set There are limiting groove G1 and second boss B2, the level that the first semicolumn boss B20 of second boss B2 is located at limiting groove G1 is recessed The top of slot G10, the horizontal groove G10 square crossing of the second semicolumn boss B21 and limiting groove G1 of second boss B2；Institute The side towards supporting element 10 for stating the first right connecting pin 81 of right interconnecting piece 8a is equipped with positive stop lug boss B1 and the second groove G2, the The first semicolumn groove G20 of two groove G2 is located above the horizontal ledge B10 of positive stop lug boss B1, and the second the half of the second groove G2 The horizontal ledge B10 square crossing of cylindrical groove G21 and positive stop lug boss B1；The second right connecting pin 82 of the right interconnecting piece 8a Side towards supporting element 10 is equipped with the first semicolumn groove G20 of limiting groove G1 and the second groove G2, the second groove G2 Above the horizontal groove G10 of limiting groove G1, the level of the second semicolumn groove G21 and limiting groove G1 of the second groove G2 Groove G10 square crossing；The side towards right interconnecting piece 8a of first supporting element connecting pin 101 of the supporting element 10 is equipped with limit Groove G1 and second boss B2, the first semicolumn boss B20 of second boss B2 are located at the horizontal groove G10 of limiting groove G1 for position Top, the horizontal groove G10 square crossing of the second semicolumn boss B21 and limiting groove G1 of second boss B2；The support The side towards right interconnecting piece 8a of second supporting element connecting pin 102 of part 10 is equipped with positive stop lug boss B1 and second boss B2, the The first semicolumn boss B20 of two boss B2 is located above the horizontal ledge B10 of positive stop lug boss B1, and the second the half of second boss B2 The horizontal ledge B10 square crossing of cylinder boss B21 and positive stop lug boss B1.

It should be pointed out that the second boss B2 is not limited in being arranged on supporting element 10, can also be respectively set On left interconnecting piece 2a and right interconnecting piece 8a, and the second groove G2 is set on supporting element 10.

It should be pointed out that be not limited in that a supporting element 10 is arranged between the left arc separating wall 2 and right arc separating wall 8, Settable multiple supporting elements 10 between left arc separating wall 2 and right arc separating wall 8, so that the arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment can be with The installation of arc extinguishing grid pieces suitable for more kinds of specifications.

First the arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment can realize left arc separating wall, supporting element and the right side by joinery and its construction The automatic alignment of arc separating wall facilitates the assembly of arc extinguishing grid pieces group and arc striking piece, avoids arc separating wall when assembling arc extinguishing grid pieces group, Arc extinguishing grid pieces can not be made to positive arc extinguishing grid pieces mounting groove, it is difficult to which the problem of assembling arc extinguishing grid pieces also avoids left arc separating wall, branch The problem of when support member is fixedly connected with right arc separating wall, three misplaces, and arc extinguishing grid pieces group is caused to tilt；And the supporting element The spacing that can be used for adjusting left arc separating wall and right arc separating wall makes the arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment be applicable to different width The installation of the arc extinguishing grid pieces of degree improves the versatility of the arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment.

The arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment and the difference of above-described embodiment also reside in: its flame item group of going out includes setting Set in the middle part of left interconnecting piece 2a and be integrated with formula structure a left side go out flame item group 20a, be arranged in the middle part of right interconnecting piece 8a and with Its right side being an integral structure, which is gone out, flame item group 80a and to be arranged in the middle part of supporting element 10 and is integrated in formula structure the flame that goes out Item group 10a；The mutually symmetrical structure of flame item group 80a that flame item group 20a is gone out on the left side and the right side is gone out；The left side go out flame item group 20a include by It is upper and under go out flame item group 23, second left side of first left side of successively parallel interval setting go out flame item group 240 and a third left side is gone out flame item group 241, the right side flame item group 80a that goes out includes that from top to bottom successively go out flame item group 83, second right side of first right side of parallel interval setting is gone out flame item Group 840 and the third right side are gone out flame item group 841, in the flame item group 10a that goes out include successively going out in the first of parallel interval setting from top to down Go out flame item group 10e in flame item group 10c, go out in second flame item group 10d and third；It goes out and goes out in flame item group 23, first in first left side Flame item group 10c and first right side flame item group 83 of going out are corresponding in turn to cooperation, and composition first goes out flame item group；Second left side is gone out flame item group 240, it goes out flame item group 10d in second and second right side flame item group 840 of going out is corresponding in turn to cooperation, composition second goes out flame item group；Described Three left sides go out flame item group 241, go out flame item group 10e in third and third right side flame item group 841 of going out is corresponding in turn to and goes out flame with being combined into third Item group.

Preferably, as shown in Figure 19-20, the supporting element 10 includes the first supporting element connection for being separately positioned on its both ends End 101 and the second supporting element connecting pin 102, are equipped with three between the first supporting element connecting pin 101 and the second supporting element connecting pin 102 Item goes out flame supporting rib, and from top to bottom successively parallel interval is arranged three flame supporting ribs that go out, and respectively first goes out the support of flame item Muscle, second go out flame supporting rib and third is gone out flame supporting rib, and first goes out flame supporting rib equipped with flame item group of going out in first 10c, go out in the middle part of the flame item flame supporting rib that goes out with first of every of the flame item group 10c that goes out in first is connected, and both ends protrusion is first It goes out flame supporting rib two sides, second goes out flame supporting rib equipped with the flame item group 10d that goes out in second, flame item group of going out in second 10d's The flame supporting rib that goes out in the middle part of every flame item of going out with second is connected, and both ends protrusion is gone out flame supporting rib two sides second, and third is gone out Flame supporting rib, which is equipped in third, to go out flame item group 10e, and every of flame item group of going out in third 10e is gone out the flame that gone out in the middle part of flame item with third Supporting rib is connected, and both ends are prominent goes out flame supporting rib two sides in third.Preferably, go out flame item group 10c's in described first Upper and lower two sides are gone out with first respectively, and the two sides up and down of flame supporting rib are concordant, and the two sides up and down of flame item group of going out in second 10d are distinguished Going out with second, the two sides up and down of flame supporting rib are concordant, and go out with third flame item respectively for the two sides up and down of flame item group of going out in third 10e The two sides up and down of supporting rib are concordant.

The arc-extinguishing chamber of low-voltage circuit breaker of the present embodiment and the difference of above-described embodiment also reside in: as shown in figure 18, described Left interconnecting piece 2a, supporting element 10 and right interconnecting piece 8a are assembled together, and form the arc separating wall top of arc-extinguishing chamber of low-voltage circuit breaker；Institute The upper end for stating short grid group is lower than the upper end of long grid group, forms the first air flue between the upper end and arc separating wall top of short grid group 10, the first air flue 10 gap between the inner space of low-voltage circuit breaker, the short grid 3 of two panels and arc extinguishing grid pieces group respectively Space between 3060 and arc separating wall top communicates；Left arc striking sheet slot allocation 28, right assembly are additionally provided on the left department of assembly 2b Right arc striking sheet slot allocation 88 is additionally provided on portion 8b, an opposite side of arc striking piece 7 is plugged on left arc striking sheet slot allocation 28 and the right side respectively In arc striking sheet slot allocation 88,7 upper end of arc striking piece is lower than long grid group upper end, and 7 upper end of arc striking piece is equipped with arc separating wall top end holder Second air flue 11, the second air flue 11 are communicated with the inner space of low-voltage circuit breaker.

Arc-extinguishing chamber of low-voltage circuit breaker of the invention, left interconnecting piece 2a, supporting element 10 and right interconnecting piece 8a by rivet 1 or Screw is fixedly linked, and rivet or screw sequentially pass through left interconnecting piece 2a, supporting element 10 and right interconnecting piece 8a, and three is fixedly connected Together.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention Protection scope.

Claims

1. a kind of arc-extinguishing chamber of low-voltage circuit breaker comprising left arc separating wall (2), right arc separating wall (8), arc extinguishing grid pieces group (3060) and draw Arcs (7), left arc separating wall (2) include that the left interconnecting piece (2a) and left department of assembly (2b) with lower part at an upper portion thereof is respectively set, right Arc separating wall (8) includes that the right interconnecting piece (8a) and right department of assembly (8b) with lower part at an upper portion thereof, arc extinguishing grid pieces group is respectively set (3060) it is separately positioned between left department of assembly (2b) and right department of assembly (8b) with arc striking piece (7)；

It is characterized by: the left interconnecting piece (2a) and right interconnecting piece (8a) are limited by joinery and its construction and are cooperated, joinery and its construction packet Positive stop lug boss (B1) and limiting groove (G1), positive stop lug boss (B1) and limiting groove (G1) limit cooperation are included, left arc separating wall is limited (2) the laterally opposed movement between right arc separating wall (8) and vertical relative movement.

2. arc-extinguishing chamber of low-voltage circuit breaker according to claim 1, it is characterised in that: the left interconnecting piece (2a) includes difference The first left connecting pin (21) and the second left connecting pin (22) at its both ends are set, and right interconnecting piece (8a) includes being separately positioned on it The right connecting pin of the first of both ends (81) and the second right connecting pin (82)；The first left connecting pin (21) passes through joinery and its construction and the One right connecting pin (81) limit cooperation, the second left connecting pin (22) are matched by joinery and its construction and the second right connecting pin (82) limit It closes.

3. arc-extinguishing chamber of low-voltage circuit breaker according to claim 2, it is characterised in that: the face of the first left connecting pin (21) The side of arc separating wall (8) is equipped with limiting groove (G1) to the right, and the side towards right arc separating wall (8) of the second left connecting pin (22) is set Have positive stop lug boss (B1), the side towards left arc separating wall (2) of the first right connecting pin (81) is equipped with positive stop lug boss (B1), and second is right The side towards left arc separating wall (2) of connecting pin (82) is equipped with limiting groove (G1)；The positive stop lug boss (B1) is T-shaped structure Boss, limiting groove (G1) be T-shaped structure groove.

4. arc-extinguishing chamber of low-voltage circuit breaker according to claim 1, it is characterised in that: further include being arranged at left interconnecting piece (2a) Flame item group of going out between right interconnecting piece (8a), flame item group of going out include that from top to bottom successively the first of parallel interval setting is gone out flame item Group, second go out flame item group and third is gone out flame item group, first go out flame item group go out flame item and second go out flame item group the flame item that goes out interlock Setting, the go out flame item that goes out of flame item group of the second go out flame item and third for going out flame item group are staggered.

5. arc-extinguishing chamber of low-voltage circuit breaker according to claim 4, it is characterised in that: the described first flame item that goes out for going out flame item group Cross section be rectangular configuration, second goes out flame item group and the go out cross section of the flame item that goes out of flame item group of third is trapezium structure, ladder Direction of the short bottom edge of shape structure towards arc extinguishing grid pieces group (3060).

6. arc-extinguishing chamber of low-voltage circuit breaker according to claim 4, it is characterised in that: the described first adjacent going out for going out flame item group It is equipped between flame item the first gap (2080), the width of all first gaps (2080) is a, a > 0；Described second goes out flame The second gap (2081) are equipped between the adjacent flame item that goes out of item group, the width at least one the second gap (2081) is c, remaining The width in the second gap (2081) is b, b=a and c > b, all width are that the second gap (2081) of c is arranged at second and goes out One end of flame item group；The third go out flame item group the adjacent flame item that goes out between be equipped with third space (2082), at least one The width in three gaps (2082) is e, the width of remaining third space (2082) is d, d=a and e > d, and all width are the of e Three gaps (2082) are arranged at third and go out one end of flame item group；The second gap (2081) and all width that all width are c It is respectively positioned on first for the third space (2082) of e and goes out below flame item group (23) the same end.

7. arc-extinguishing chamber of low-voltage circuit breaker according to claim 4, it is characterised in that: the flame item group of going out includes being arranged on a left side It in the middle part of interconnecting piece (2a) and is integrated with the left side of formula structure and goes out flame item group (20a), and setting is in the middle part of right interconnecting piece (8a) And the right side for being integrated with formula structure is gone out flame item group (80a)；Flame item group (20a) is gone out on the left side and flame item group (80a) is gone out each other in the right side Symmetrical structure；The left side go out flame item group (20a) include from top to bottom successively parallel interval setting first left side go out flame item group (23), Flame item group (241) that flame item group (240) is gone out on second left side and a third left side is gone out, right side flame item group (80a) of going out includes from top to bottom successively parallel Go out flame item group (840) and the third right side is gone out flame item group (841) in go out flame item group (83), second right side of spaced first right side；Described Go out flame item group (240) and third left side flame item group (241) of going out is gone out with first right side flame item group respectively in go out flame item group (23), second left side of one left side (83), flame item group (840) is gone out on second right side and the third right side is gone out flame item group (841) corresponding matching, is separately constituted first and is gone out flame article group, Two go out flame item group and third is gone out flame item group.

8. arc-extinguishing chamber of low-voltage circuit breaker according to claim 6, it is characterised in that: go out on further including flame piece (4) and under go out Flame piece (5)；Described second goes out flame item group and third goes out and forms the first assembly cavity between flame item group, and flame piece (4) setting of above going out is the In one assembly cavity, third, which is gone out, forms the second assembly cavity between flame item group and arc extinguishing grid pieces group (3060), under go out flame piece (5) setting exist In second assembly cavity.

9. arc-extinguishing chamber of low-voltage circuit breaker according to claim 8, it is characterised in that: go out flame piece (4) on described including being arranged Multiple row first through hole (402) on it, each column first through hole (402) include multiple successively spaced first through hole (402)；

The flame piece (5) that goes out under described includes the second through-hole of multiple row (501) being disposed thereon and an at least column third through-hole (502), The third through-hole (502) of the internal diameter of the second through-hole of internal diameter > (501) of third through-hole (502), all column is arranged at down the flame that goes out One end of piece (5), and all width be c the second gap (2081) and all width be e third space (2082) respectively with Third through-hole (502) is correspondingly arranged and is located at the two sides of third through-hole (502).

10. arc-extinguishing chamber of low-voltage circuit breaker according to claim 8, it is characterised in that: an opposite side of first assembly cavity It is respectively provided on one flame piece retention bead of going out on wall, flame piece limit of going out is respectively provided on one on an opposite side of the flame piece (4) that above goes out Groove (401), flame piece retention bead (25) of above going out and flame piece limiting groove (401) limit of above going out cooperate；

The both ends of one side wall of second assembly cavity are respectively provided with first chamfering structure, under go out a side of flame piece (5) Two vertex on side are respectively provided with second chamfering structure (503), if the side between two the second chamfering structures (503) is flat One column third through-hole (502) of the capable flame piece (5) that goes out under, the first chamfering structure and the second chamfering structure (503) limit cooperate.

The arc extinguishing grid pieces group (3060) includes short grid group and long grid group, and short grid group and arc striking piece (7) are separately positioned on The two sides of long grid group, short grid group include the short grid of two panels (3), and long grid group includes at least three length of a film grid (6)；The left side The department of assembly side (2b) is equipped with multiple left grid fitting grooves (26), and the right department of assembly side (8b) is equipped with multiple right grid fitting grooves (86), left grid fitting groove (26) and right grid fitting groove (86) are arranged in a one-to-one correspondence, an opposite side point for each short grid (3) She Zhi not be in a left grid fitting groove (26) and a right grid fitting groove (86), an opposite side of each long grid (6) It is separately positioned in a left grid fitting groove (26) and a right grid fitting groove (86).

One vertex of long grid (6) upper end is equipped with long grid chamfering structure (601), for assembling long grid (6) The upper end of left grid fitting groove (26) is alternately equipped with left grid limited block (2601), and the right grid for assembling long grid (6) fills The upper end of slot allocation (86) is alternately equipped with right grid limited block (8601), left grid limited block (2601) and right grid limited block (8601) be staggered, the long grid chamfering structure (601) of the long grid (6) of adjacent two respectively with left grid limited block (2601), right grid limited block (8601) limit cooperation.

The left interconnecting piece (2a) and right interconnecting piece (8a) are assembled together, and form the arc separating wall top of arc-extinguishing chamber of low-voltage circuit breaker End；The upper end of the short grid group is lower than the upper end of long grid group, and the is formed between the upper end and arc separating wall top of short grid group One air flue (10), the first air flue (10) respectively the gap between the inner space of low-voltage circuit breaker, the short grid of two panels (3) and Arc extinguishing grid pieces group (3060) is communicated with the space between arc separating wall top.

The left interconnecting piece (2a) and right interconnecting piece (8a) are assembled together, and form the arc separating wall top of arc-extinguishing chamber of low-voltage circuit breaker End；It is additionally provided with left arc striking sheet slot allocation (28) on the left department of assembly (2b), is additionally provided with right arc striking sheet on right department of assembly (8b) Slot allocation (88), an opposite side of arc striking piece (7) are plugged on left arc striking sheet slot allocation (28) and right arc striking sheet slot allocation (88) respectively Interior, arc striking piece (7) upper end is lower than long grid group upper end, and the second air flue is equipped between arc striking piece (7) upper end and arc separating wall top (11), the second air flue (11) is communicated with the inner space of low-voltage circuit breaker.

The left interconnecting piece (2a) of institute is fixedly connected with right interconnecting piece (8a) by rivet or screw.

It further include the supporting element (10) being arranged between left interconnecting piece (2a) and right interconnecting piece (8a)；The left interconnecting piece (2a) Both ends pass through joinery and its construction respectively and the both ends limit of supporting element (10) side cooperates, and the both ends of right interconnecting piece (8a) pass through respectively The both ends of joinery and its construction and supporting element (10) other side, which limit, to be cooperated；The joinery and its construction includes that the limit of mutual limit cooperation is recessed Slot (G1) and positive stop lug boss (B1), limiting groove (G1) are the groove of T-shaped structure, and positive stop lug boss (B1) is T-shaped structure Boss；The limiting groove (G1) includes horizontal groove (G10) and vertical groove (G11), and vertical groove (G11) is arranged in level It is connected in the middle part of the groove side (G10) and vertical groove (G11) with one end right angle horizontal groove (G10), positive stop lug boss (B1) includes Horizontal ledge (B10) and vertical boss (B11), vertical boss (B11) are arranged in the horizontal ledge side (B10) and vertical boss (B11) middle part is connected with one end right angle horizontal ledge (B10)；The joinery and its construction further includes the second boss of mutual limit cooperation (B2) and the second groove (G2), second boss (B2) in the middle part of horizontal groove (G10) or vertical friendship in the middle part of horizontal ledge (B10) Fork, the second groove (G2) and horizontal ledge (B10) or horizontal groove (G10) square crossing；The second boss (B2) includes setting Set the first semicolumn boss (B20) above horizontal groove (G10) or horizontal ledge (B10) and with horizontal groove (G10) Or the second semicolumn boss (B21) of horizontal ledge (B10) square crossing, the outer diameter > second of the first semicolumn boss (B20) The outer diameter of semicolumn boss (B21), and the first semicolumn boss (B20) and second semicolumn boss (B21) concentric；Described Two grooves (G2) include be arranged the first semicolumn groove (G20) above horizontal ledge (B10) or horizontal groove (G10) and With the second semicolumn groove (G21) of horizontal ledge (B10) or horizontal groove (G10) square crossing, the first semicolumn groove (G20) internal diameter of internal diameter > the second semicolumn groove (G21), and the first semicolumn groove (G20) and the second semicolumn groove (G21) concentric.