CN109671596B - Plastic case circuit breaker - Google Patents
Plastic case circuit breaker Download PDFInfo
- Publication number
- CN109671596B CN109671596B CN201710967915.3A CN201710967915A CN109671596B CN 109671596 B CN109671596 B CN 109671596B CN 201710967915 A CN201710967915 A CN 201710967915A CN 109671596 B CN109671596 B CN 109671596B
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- Prior art keywords
- connecting shaft
- contact
- insulating
- sleeve
- circuit breaker
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- 230000007704 transition Effects 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims description 83
- 230000005404 monopole Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 230000016507 interphase Effects 0.000 abstract description 5
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 8
- 239000012212 insulator Substances 0.000 description 7
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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Abstract
The invention provides the field of low-voltage electric appliances, and particularly relates to a molded case circuit breaker, which comprises a contact system group, wherein the contact system group comprises a plurality of groups of contact systems which are arranged side by side, the contact system comprises a movable contact capable of axially rotating and a fixed contact matched with the movable contact for use, the movable contact axially rotates to realize the closing/opening of the movable contact and the fixed contact, and a plurality of movable contacts are connected in series through connecting shafts to form the movable contact group so as to realize linkage; the connecting shaft comprises a transition section positioned between two adjacent moving contacts and end sections protruding out of two ends of the moving contact group, and insulating assemblies are arranged on the transition section and the end sections of the connecting shaft to electrically insulate the side surfaces of the transition section and the end sections of the connecting shaft; the plastic shell circuit breaker has the advantages of simple structure, good short-current breaking performance and difficult occurrence of interphase short circuit.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a molded case circuit breaker.
Background
The connecting shaft of the existing plastic shell circuit breaker is a metal shaft which is connected with a plurality of moving contacts in series without an insulation protection structure. Under the condition of high-voltage high-current breaking, charged substances generated during breaking of the molded case circuit breaker have certain probability to be conducted with the parts of the connecting shafts exposed in the charged substances, so that interphase short circuit is caused, and the short circuit breaking capacity and the breaking reliability of the molded case circuit breaker are reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the molded case circuit breaker which has the advantages of simple structure, good short-current breaking performance and difficult occurrence of interphase short circuit.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the plastic case circuit breaker comprises a contact system group, wherein the contact system group comprises a plurality of groups of contact systems which are arranged side by side, the contact system comprises a movable contact capable of rotating axially and a fixed contact matched with the movable contact for use, the movable contact axially rotates to realize the closing/opening of the movable contact and the fixed contact, and a plurality of movable contacts are connected in series through a connecting shaft 30 to form a movable contact group 1 so as to realize linkage;
the connecting shaft 30 comprises a transition section between two adjacent movable contacts and end sections protruding from two ends of the movable contact group 1, and insulation components are arranged on the transition section and the end sections of the connecting shaft 30 to electrically insulate the sides of the transition section and the end sections of the connecting shaft 30.
Preferably, the insulation assembly comprises an insulation sleeve 5 that fits over the coupling shaft 30.
Preferably, the single-pole circuit breaker 900 comprises a plurality of single-pole circuit breakers 900 which are arranged side by side, wherein the single-pole circuit breaker 900 comprises a single-pole circuit breaker shell 901 and a moving contact which is rotatably arranged inside the single-pole circuit breaker shell 901, kidney-shaped holes 902 matched with the movement track of the connecting shaft 30 are formed in two sides of the single-pole circuit breaker shell 901, insulating sleeves are arranged on two sides of the moving contact, one ends of the insulating sleeves are connected with the moving contact, and the other ends of the insulating sleeves protrude out of the single-pole circuit breaker shell 901 through the kidney-shaped holes 902.
Preferably, the connecting shaft 30 includes a first connecting shaft 301 and a second connecting shaft 302 disposed parallel to the first connecting shaft 301;
the insulation sleeve comprises a first insulation sleeve 50 and a second insulation sleeve 51, and further comprises a ring plate 500 for connecting the first insulation sleeve 50 and the second insulation sleeve 51 and shielding the kidney-shaped hole 902, wherein the first insulation sleeve 50 and the second insulation sleeve 51 are respectively arranged at two radial ends of the ring plate 500.
Preferably, the moving contact comprises a contact support 2002 and a contact bridge 2003, a radial through hole 2004 is arranged in the middle of the contact support 2002, the contact bridge 2003 is inserted in the radial through hole 2004, and two ends of the contact bridge 2003 respectively protrude outside two ends of the radial through hole 2004;
the contact support 2002 is provided with a connecting shaft through hole 2000 for inserting the connecting shaft 30, one end of the insulating sleeve is inserted into the connecting shaft through hole 2000, and the other end of the insulating sleeve protrudes outside the single-pole breaker housing 901 through the kidney-shaped hole 902, and the inner diameter of the connecting shaft through hole 2000 is matched with the outer diameter of the insulating sleeve.
Preferably, the moving contact comprises a contact support 2002 and a contact bridge 2003, a radial through hole 2004 is arranged in the middle of the contact support 2002, the contact bridge 2003 is inserted in the radial through hole 2004, and two ends of the contact bridge 2003 respectively protrude outside two ends of the radial through hole 2004;
the contact support 2002 is provided with a connecting shaft through hole 2000 matched with the connecting shaft 30, the inner diameter of the connecting shaft through hole 2000 is matched with the outer diameter of the connecting shaft 30, counter bores 2006 are arranged at two ends of the connecting shaft through hole 2000, the inner diameter of the counter bores 2006 is matched with the outer diameter of an insulating sleeve, one end of the insulating sleeve is inserted into the counter bores 2006, and the other end of the insulating sleeve protrudes out of the single-pole breaker shell 901 through the kidney-shaped hole 902.
Preferably, the insulating sleeve includes a first insulating sleeve 50 and a second insulating sleeve 51, the length of the second insulating sleeve 51 > the length of the first insulating sleeve 50, and one end of the insulating sleeve inserted into the counter bore 2006 is connected to the bottom surface of the counter bore 2006.
Preferably, the connecting shaft 30 includes a first connecting shaft 301 and a second connecting shaft 302 disposed parallel to the first connecting shaft 301;
the insulation sleeve comprises a first insulation sleeve 50 and a second insulation sleeve 51, the length of the second insulation sleeve 51 is greater than the length of the first insulation sleeve 50, and the outer diameter of the second insulation sleeve 51 is the same as the outer diameter of the first insulation sleeve 50;
the circuit breaker further comprises a ring plate 500 for connecting the first insulating sleeve 50 and the second insulating sleeve 51, the first insulating sleeve 50 and the second insulating sleeve 51 are respectively arranged at two radial ends of the ring plate 500, the ring plate 500 is clamped between the contact support 2002 and the corresponding single-pole breaker shell 902 and shields the kidney-shaped hole 902, the first insulating sleeve 50, the second insulating sleeve 51 and the ring plate 500 form a first insulating piece 40, the first insulating sleeve 50 comprises a first left end 501 and a first right end 502, the second insulating sleeve 51 comprises a second left end 511 and a second right end 512, the first left end 501 and the second left end 511 are positioned on one side of the ring plate 500, the first left end 501 and the second left end 511 are flush, and the first right end 502 and the second right end 512 are positioned on the other side of the ring plate 500.
Preferably, the connecting shaft 30 includes a first connecting shaft 301 and a second connecting shaft 302 disposed parallel to the first connecting shaft 301; the insulation sleeves comprise a third insulation sleeve 53 and a fourth insulation sleeve 54, the length of the fourth insulation sleeve 54 is greater than the length of the third insulation sleeve 53, and the outer diameter of the fourth insulation sleeve 54 is the same as the outer diameter of the third insulation sleeve 53;
also included is a ring plate 500, the third insulating sheath 53 including a third left end 531 and a third right end 532 protruding on both sides of the ring plate 500, respectively, the fourth insulating sheath 54 including a fourth left end 541 and a fourth right end 542 protruding on both sides of the ring plate 500, the length of the fourth right end 542 being greater than the length of the fourth left end 541, the length of the fourth right end 542 being greater than the length of the third right end 532, the length of the fourth left end 541 being the same as the length of the third left end 531;
a ring plate 500, and a third insulating sleeve 53 and a fourth insulating sleeve 54 respectively arranged at two radial ends of the ring plate 500 to form a second insulating member 42, wherein a third left end 531 of the third insulating sleeve 53 and a fourth left end 541 of the fourth insulating sleeve 54 are positioned on the same side of the ring plate 500 and are flush, and a third right end 532 of the third insulating sleeve 53 and a fourth right end 542 of the fourth insulating sleeve 54 are positioned on the other side of the ring plate 500;
the third insulating member 43 is formed by one ring plate 500 and two fourth insulating sleeves 54 respectively provided at both radial ends of the ring plate 500, the fourth left ends 541 of the two fourth insulating sleeves 54 are located at one side of the ring plate 500, and the fourth right ends of the two fourth insulating sleeves 54 are located at the other side of the ring plate 500.
Preferably, the middle parts of the two axial ends of the contact support 2002 are respectively provided with an annular pillow block, the middle parts of the annular pillow blocks are provided with transmission shaft grooves, and the inner diameter of the annular plate 500 is matched with the outer diameter of the annular pillow block.
The plastic shell circuit breaker comprises the connecting shaft, the insulating assembly is arranged on the connecting shaft, the transition section of the connecting shaft between the two connected moving contacts and the surfaces of the end sections of the two ends of the contact system group are electrically insulated, the connecting shaft is prevented from being directly exposed to charged substances, the probability of conducting the charged substances with the connecting shaft is greatly reduced, the short circuit breaking capacity and the breaking reliability of the plastic shell circuit breaker are improved, and the condition of interphase short circuit is avoided. In addition, the first insulating cover comprises a ring plate, the ring plate is clamped between the contact support and the corresponding monopole circuit breaker shell, the situation that the insulating performance of the first insulating cover is affected due to the fact that the first insulating cover moves along the connecting shaft in the using process of the molded case circuit breaker is avoided, and the charged substances can be prevented from overflowing through the kidney-shaped holes due to the fact that the ring plate shields the kidney-shaped holes is avoided, and the insulating performance of the molded case circuit breaker is further improved.
Drawings
Fig. 1 is a schematic structural view of a molded case circuit breaker of the present invention;
fig. 2 is a schematic structural view of the single pole circuit breaker of the present invention;
FIG. 3 is a schematic view of the assembled structure of the insulating sleeve and contact support of the present invention;
FIG. 4 is a schematic view of the structure of the first insulator of the present invention;
FIG. 5 is a schematic view of the structure of the moving contact of the present invention;
fig. 6 is a schematic view of the assembled structure of the insulating sleeve and contact support of the present invention;
fig. 7 is a schematic view of another assembled structure of the insulating sleeve and contact support of the present invention;
FIG. 8 is a schematic view of the assembled structure of the first insulator and contact support of the present invention;
fig. 9 is a schematic view of another assembled structure of the first insulator and contact support of the present invention;
FIG. 10 is a schematic view of an assembled structure of an insulating sleeve and a movable contact set according to the present invention;
FIG. 11 is a schematic view of another assembled structure of the insulating sleeve and the movable contact set of the present invention;
FIG. 12 is a schematic view of an assembled structure of a first insulator and a movable contact set according to the present invention;
FIG. 13 is a schematic view of the structure of a second insulator of the present invention;
FIG. 14 is a schematic view of the structure of a third insulator of the present invention;
fig. 15 is a schematic diagram of an assembly structure of the second insulating member, the third insulating member and the movable contact set according to the present invention.
Detailed Description
Specific embodiments of the molded case circuit breaker of the present invention are further described below with reference to the examples shown in fig. 1 to 15. The molded case circuit breaker of the present invention is not limited to the description of the following embodiments.
The invention relates to a molded case circuit breaker, which comprises a contact system group, wherein the contact system group comprises a plurality of groups of contact systems which are arranged side by side, the contact system further comprises a movable contact capable of axially rotating and a fixed contact matched with the movable contact for use, the movable contact axially rotates to realize the closing/opening of the movable contact and the fixed contact, and a plurality of movable contacts are connected in series through a connecting shaft 30 to form a movable contact group 1 so as to realize linkage;
the connecting shaft 30 comprises a transition section between two adjacent movable contacts and end sections protruding out of two ends of the movable contact group 1, and insulation components are arranged on the transition section and the end sections of the connecting shaft 30 to electrically insulate the sides of the transition section and the end sections of the connecting shaft 30.
The connecting shaft of the existing plastic shell circuit breaker is a metal shaft which is connected with a plurality of moving contacts in series without an insulation protection structure. Under the condition of high-voltage high-current breaking, charged substances generated during breaking of the molded case circuit breaker have certain probability to be conducted with the part of the connecting shaft exposed in the charged substances, so that interphase short circuit is caused, and the short circuit breaking capacity and the breaking reliability of the molded case circuit breaker are reduced.
The plastic shell circuit breaker comprises the connecting shaft, and the insulating assembly is arranged on the connecting shaft, so that the side surfaces of the transition section and the end section of the connecting shaft are electrically insulated, the connecting shaft is prevented from being directly exposed to charged substances, the probability of conducting the charged substances with the connecting shaft is greatly reduced, and the short circuit breaking capacity and the breaking reliability of the plastic shell circuit breaker are improved.
The molded case circuit breaker of the present invention will be further described with reference to specific embodiments and drawings.
As shown in fig. 1, a preferred embodiment of the molded case circuit breaker of the present invention is shown.
As shown in fig. 1, the molded case circuit breaker of the present invention comprises a plurality of single-pole circuit breakers 900 arranged side by side in sequence from right to left, the single-pole circuit breakers 900 comprise single-pole circuit breaker housings 901, a contact system is arranged in the single-pole circuit breaker housings 901, the contact system comprises moving contacts axially rotatably arranged in the circuit breaker housings 901 and fixed contacts matched with the moving contacts, and the moving contacts of the plurality of single-pole circuit breakers 900 form a moving contact group 1 and are connected in series through connecting shafts 30 to realize linkage. As shown in fig. 2, kidney-shaped holes 902 matching with the movement track of the connecting shaft 30 are provided on both sides of the single-pole breaker housing 901. Preferably, as shown in fig. 2, contact supporting shaft holes are arranged in the middle of two sides of the single-pole breaker housing 901, kidney-shaped holes 902 are positioned at two radial ends of the contact supporting shaft holes, and the inner diameter of the contact supporting shaft holes is matched with the outer diameter of the annular pillow block of the contact support 2002.
As shown in fig. 3-5, the moving contact includes a contact support 2002, a radial through hole 2004 is provided in the middle of the contact support 2002, a contact bridge 2003 is inserted in the radial through hole 2004 and two ends of the contact bridge 2004 are respectively protruded outside two ends of the radial through hole 2004, a connecting shaft through hole 2000 is provided at the outer side of the radial through hole 2004 near the contact bridge 2003, and the connecting shaft through hole 2000 penetrates the contact support 2002 along the axial direction of the contact support 2002.
Preferably, as shown in fig. 3 and 4, the middle parts of two axial ends of the contact support 2002 are respectively provided with an annular pillow block, the middle part of the annular pillow block is provided with a transmission shaft groove, a transmission shaft is arranged between two adjacent contact supports 2002, and two ends of the transmission shaft are respectively arranged in the transmission shaft grooves of two adjacent contact supports 2002.
As shown in fig. 1, the connecting shaft 30 includes a transition section between two adjacent moving contacts and end sections protruding from the left and right ends of the moving contact group 1, and insulating assemblies are disposed on the transition section and the end sections.
Preferably, the insulation assembly comprises insulation sleeves sleeved on the connecting shaft 30, and insulation sleeves are arranged on two sides of the moving contact, as shown in fig. 1 and 2, one end of each insulation sleeve is connected with the contact support 2002 of the corresponding moving contact, and the other end of each insulation sleeve protrudes out of the single-pole breaker casing 901 through the kidney-shaped hole 902. Of course, the shaft 30 may be entirely covered with an insulating sheath.
It should be noted that the insulating component may also be an insulating layer coated on the connecting shaft 30, or a ceramic insulating layer or a plastic insulating layer wrapped on the outer side of the connecting shaft 30.
As shown in fig. 1, the molded case circuit breaker of the present invention further comprises an operating mechanism 8, wherein the operating mechanism 8 is connected with the connecting shaft 30 through a connecting rod 80, and is used for driving the moving contact group 1 to act.
The insulation assembly of the present invention will be further described with reference to the drawings and the specific embodiments.
The following is one embodiment of the insulation assembly of the present invention:
the insulation assembly is a tubular insulation sleeve 5, and the insulation sleeve 5 is in interference fit with the connecting shaft 30.
As shown in fig. 6, the inside diameter of the through hole 2000 of the contact support 2002 is matched with the outside diameter of the insulating sleeve 5, the insulating sleeve 5 is arranged on both sides of the contact support 2002, one end of the insulating sleeve 5 is inserted into the through hole 2000 of the contact support, and the other end protrudes outside the casing 901 of the single-pole circuit breaker through the kidney-shaped hole 902. It should be noted that the length of the insulating sleeve inserted into the through-hole 2000 can be adjusted as required, that is, the length of the insulating sleeve inserted into the through-hole 2000 can be increased or decreased as required.
As shown in fig. 11, the molded case circuit breaker of the present invention includes four single-pole circuit breakers 900 disposed side by side in sequence from right to left, the four single-pole circuit breakers 900 include four moving contacts, which are respectively a first moving contact 201, a second moving contact 211, a third moving contact 221 and a fourth moving contact 231 from right to left, the connecting shaft 30 includes a first connecting shaft 301 and a second connecting shaft 302, and the four moving contacts are connected in series with each other through the second connecting shaft 302 on the upper side and the first connecting shaft 301 on the lower side to form a moving contact group 1 to achieve linkage.
As shown in fig. 11, the left end of the insulating sleeve 5 at the left end of the second connecting shaft 302 and the right end of the insulating sleeve 5 at the right end of the second connecting shaft 302 are aligned with the left end and the right end of the second connecting shaft 302 respectively, and the ends of the two insulating sleeves 5 sleeved on the second connecting shaft 302 and positioned between the two moving contacts are connected; the left end of the insulating sleeve 5 at the left end of the first connecting shaft 301 and the right end of the insulating sleeve 5 at the right end of the first connecting shaft 301 are aligned with the left end and the right end of the first connecting shaft 301 respectively, the two insulating sleeve 5 ends sleeved on the first connecting shaft 301 and positioned between the first moving contact 201 and the second moving contact 211 are connected, an assembly gap is arranged between the two insulating sleeve 5 ends sleeved on the first connecting shaft 301 and positioned between the second moving contact 211 and the third moving contact 221, and an assembly gap is arranged between the two insulating sleeve 5 ends sleeved on the first connecting shaft 301 and positioned between the third moving contact 221 and the fourth moving contact 231.
Preferably, as shown in fig. 11, two insulating sleeves 5 sleeved on the second connecting shaft 302 and located between two adjacent moving contacts may be of an integral structure; the two insulating sleeves 5, which are fitted over the first link 301 between the first moving contact 201 and the second moving contact 211, may be of a unitary structure.
The connecting rod 80 of the operating mechanism 8 is in driving connection with the first connecting shaft 301 in the assembly gap, and the operating mechanism 8 is directly connected with the assembly gap part of the first connecting shaft 301 through the connecting rod 80, so that the effectiveness of the operating mechanism 8 in driving the movable contact group 1 is ensured. It should be noted that the molded case circuit breaker of the present invention may be provided with only the first connecting shaft 301 and not with the second connecting shaft 302.
The following is a second embodiment of the insulation assembly of the present invention:
the insulation assembly is a tubular insulation sleeve 5, and the insulation sleeve 5 is in interference fit with the connecting shaft 30.
As shown in fig. 10, the insulating sleeve 5 includes a first insulating sleeve 50 and a second insulating sleeve 51, and the length of the second insulating sleeve 51 > the length of the first insulating sleeve 50, and the outer diameter of the first insulating sleeve 50 is the same as the outer diameter of the second insulating sleeve 51.
As shown in fig. 7, the inside diameter of the through hole 2000 of the connecting shaft of the contact support 2002 is matched with the outside diameter of the connecting shaft 30, the two ends of the through hole 2000 of the connecting shaft are provided with counter bores 2006, one end of the insulating sleeve 5 is inserted into the counter bore 2006 and is connected with the bottom surface of the counter bore 2006, and the other end protrudes outside the single-pole breaker housing 901 through the kidney-shaped hole 902.
As shown in fig. 10, the molded case circuit breaker of the present invention includes four single-pole circuit breakers 900 disposed side by side in sequence from right to left, the four single-pole circuit breakers 900 include four moving contacts, which are respectively a first moving contact 201, a second moving contact 211, a third moving contact 221 and a fourth moving contact 231 from right to left, the connecting shaft 30 includes a first connecting shaft 301 and a second connecting shaft 302 disposed in parallel, and the four moving contacts are connected in series with each other through the second connecting shaft 302 on the upper side and the first connecting shaft 301 on the lower side to form a moving contact group 1 to achieve linkage.
As shown in fig. 10, two first insulating sleeves 50 are disposed on the right side of the first moving contact 201, and two second insulating sleeves 51 are disposed on the left side; two second insulating sleeves 51 are arranged on the right side of the second moving contact 211, and two second insulating sleeves 51 are arranged on the left side; the right side of the third moving contact 221 is provided with a first insulating sleeve 50 and a second insulating sleeve 51, and the left side is provided with a first insulating sleeve 50 and a second insulating sleeve 51; the right side of the fourth moving contact 231 is provided with two second insulating sleeves 51, and the left side is provided with two first insulating sleeves 50.
As shown in fig. 10, the right ends of the two first insulating sleeves 50 on the right side of the first moving contact 201 are aligned with the right end of the first connecting shaft 301 and the right end of the second connecting shaft 302, respectively, and the left ends of the two first insulating sleeves 50 on the left side of the fourth moving contact 231 are aligned with the left end of the first connecting shaft 301 and the left end of the second connecting shaft 302, respectively; the end part of the insulating sleeve 5 which is sleeved on the second connecting shaft 302 and is positioned between the two moving contacts is connected; the ends of two insulating sleeves 5 which are sleeved on the first connecting shaft 301 and are positioned between the first moving contact 201 and the second moving contact 211 are connected; an assembly gap is provided between the ends of the two insulating sleeves 5 between the second moving contact 211 and the third moving contact 221 that are fitted over the first connecting shaft 301, and an assembly gap is provided between the ends of the two insulating sleeves 5 between the third moving contact 221 and the fourth moving contact 231 that are fitted over the first connecting shaft 301.
The connecting rod 80 of the actuating mechanism 8 is in driving connection with the first connecting shaft 301 in the assembly gap. It should be noted that the molded case circuit breaker of the present invention may be provided with only the first connecting shaft 301 and not with the second connecting shaft 302.
The following is a third embodiment of the insulation assembly of the present invention:
as shown in fig. 4, the insulation assembly includes a first insulation member 40, and the first insulation member 40 includes a ring plate 500, and first and second insulation sleeves 50 and 51 provided at both radial ends of the ring plate 500, respectively.
The length of the second insulating sleeve 51 > the length of the first insulating sleeve 50, the outer diameter of the first insulating sleeve 50 is the same as the outer diameter of the second insulating sleeve 51, the lengths of the second insulating sleeve 51 protruding on both sides of the ring plate 500 are the same, the first insulating sleeve 50 comprises a first left end 501 and a first right end 502, the second insulating sleeve 51 comprises a second left end 511 and a second right end 512, the first left end 501 and the second left end 511 are positioned on the left side of the ring plate 500 and are flush, and the first right end 502 and the second right end 512 are positioned on the right side of the ring plate 500. The inner diameter of the ring plate 500 is matched with the outer diameter of the annular pillow block of the contact support 2002, the ring plate 500 is arranged between the end part of the contact support 2002 and the corresponding monopole breaker shell 901, the kidney-shaped hole 902 is shielded, charged substances are prevented from overflowing out of the monopole breaker shell 901 from the kidney-shaped hole 902, the insulation performance of the plastic case breaker is further improved, the conduction probability between the connecting shaft 30 and the charged substances is further reduced, the ring plate 500 is clamped between the contact support 2002 and the corresponding monopole breaker shell 901, the first insulation assembly 40 is prevented from moving along the connecting shaft 30, and the insulation performance of the plastic case breaker is improved.
As shown in fig. 12, the molded case circuit breaker of the present invention includes four single-pole circuit breakers 900, each of the four single-pole circuit breakers 900 includes four moving contacts, the four moving contacts are connected in parallel through a first connecting shaft 301 and a second connecting shaft 302 to form a moving contact group 1 to achieve linkage, the four moving contacts are a first moving contact 201, a second moving contact 211, a third moving contact 221 and a fourth moving contact 231 from right to left, and both sides of each moving contact are provided with a first insulating member 40.
As shown in fig. 12, by adjusting the mating manner of the first insulating member 40 and the moving contact, there is an assembly gap between the two first insulating sleeves 50 located between the second moving contact 211 and the third moving contact 221 and provided on the first connecting shaft 301, and there is an assembly gap between the two first insulating sleeves 50 located between the third moving contact 221 and the fourth moving contact 231 and provided on the first connecting shaft 301, and the other two first insulating sleeves 50 located between the adjacent two moving contacts or the two second insulating sleeves 51 located between the adjacent two moving contacts are in contact with each other.
Preferably, as shown in fig. 8, the inner diameter of the through-shaft 2000 of the contact support 2002 matches the outer diameter of the first insulating sleeve 50.
Preferably, as shown in fig. 9, the inner diameter of the through hole 2000 of the connecting shaft of the contact support 2002 is matched with the outer diameter of the connecting shaft 30, the two ends of the through hole 2000 of the connecting shaft are provided with counter bores 2006, the inner diameter of the counter bores 2006 is matched with the outer diameter of the first insulating sleeve 50, and the length of the counter bores 2006 is equal to or greater than the length of the second left end 511 of the second insulating sleeve 51.
The connecting rod 80 of the actuating mechanism 8 is in driving connection with the first connecting shaft 301 in the assembly gap. It should be noted that the molded case circuit breaker of the present invention may be provided with only the first connecting shaft 301 and not with the second connecting shaft 302.
The following is a fourth embodiment of the insulation assembly of the present invention:
as shown in fig. 13 and 14, the insulation assembly of the present invention includes a second insulation member 42 and a third insulation member 43, the second insulation member 42 includes a ring plate 500 and third and fourth insulation sleeves 53 and 54 respectively provided at both radial ends of the ring plate 500, the third insulation member 43 includes the ring plate 500 and two fourth insulation sleeves 54 respectively provided at both radial ends of the ring plate 500, the length of the fourth insulation sleeve 54 > the length of the third insulation sleeve 53, the outer diameter of the fourth insulation sleeve 54 is the same as the outer diameter of the third insulation sleeve 53, and the inner diameters of the fourth insulation sleeve 54, the inner diameter of the third insulation sleeve 53 are matched with the outer diameter of the coupling shaft 30.
As shown in fig. 13 and 14, the fourth insulating sheath 54 includes a fourth left end 541 located at the left side of the ring plate 500 and a fourth right end 542 located at the right side of the ring plate 500, the length of the fourth right end 542 > the length of the fourth left end 541, and the third insulating sheath 53 includes a third left end 531 located at the left side of the ring plate 500 and a third right end 532 located at the right side of the ring plate 500. As shown in fig. 13, in the second insulating member 42, the third left end 531 of the third insulating sleeve 53 is flush with the fourth left end 541 of the fourth insulating sleeve 54, and the length of the third right end 532 is less than the length of the fourth right end 542. As shown in fig. 14, the third insulating members 43 are flush with the fourth left ends 541 of the two fourth insulating sleeves 54, and the fourth right ends 542 of the two fourth insulating sleeves 54 are flush.
Preferably, as shown in fig. 8, the inner diameter of the through-shaft hole 2000 of the contact support 2002 matches the outer diameter of the third insulating sleeve 53.
Preferably, as shown in fig. 9, the inner diameter of the through hole 2000 of the connecting shaft of the contact support 2002 is matched with the outer diameter of the connecting shaft 30, counter bores 2006 are arranged at two ends of the through hole 2000 of the connecting shaft, the inner diameter of the counter bores 2006 is matched with the outer diameter of the third insulating sleeve 53, and the length of the counter bores 2006 is equal to or greater than the length of the fourth right end 542 of the fourth insulating sleeve 54.
As shown in fig. 15, the molded case circuit breaker of the present invention includes four single-pole circuit breakers 900 arranged side by side, the four single-pole circuit breakers 900 include four moving contacts, the four moving contacts are connected in series side by side through a first connecting shaft 301 and a second connecting shaft 302 to form a moving contact group 1 to achieve linkage, and the four moving contacts are a first moving contact 201, a second moving contact 211, a third moving contact 221 and a fourth moving contact 231 from right to left. A second insulating member 42 or a third insulating member 43 may be disposed on the left side of the moving contact set 1, and a second insulating member 42 or a third insulating member 43 may be disposed on the right side of the moving contact set 1; two third insulators 43 are arranged between the first moving contact 201 and the second moving contact 211; a third insulating member 43 is disposed on the left side of the second moving contact 211, and a second insulating member 42 is disposed on the right side of the third moving contact 221, so that an assembly gap exists between the third insulating sleeve 53 and the fourth insulating sleeve 54 sleeved on the first connecting shaft 301 between the second moving contact 211 and the third moving contact 221; the third moving contact 221 is provided with a second insulating member 42 on the left side, and the fourth moving contact 231 is provided with a third insulating member 43 on the right side, so that an assembly gap exists between the third insulating sleeve 53 and the fourth insulating sleeve 54, which are sleeved on the first connecting shaft 301, between the third moving contact 221 and the fourth moving contact 231.
The connecting rod 80 of the actuating mechanism 8 is in driving connection with the first connecting shaft 301 in the assembly gap. It should be noted that the molded case circuit breaker of the present invention may be provided with only the first connecting shaft 301 and not with the second connecting shaft 302.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. The plastic shell circuit breaker comprises a contact system group, wherein the contact system group comprises a plurality of groups of contact systems which are arranged side by side, the contact system comprises a movable contact capable of axially rotating and a fixed contact which is matched with the movable contact for use, the movable contact axially rotates to realize the closing/opening of the movable contact and the fixed contact, and a plurality of movable contacts are connected in series through a connecting shaft (30) to form a movable contact group (1) so as to realize linkage;
the method is characterized in that: the connecting shaft (30) comprises a transition section positioned between two adjacent moving contacts and end sections protruding out of two ends of the moving contact group (1), and insulation components are arranged on the transition section and the end sections of the connecting shaft (30) to electrically insulate the side surfaces of the transition section and the end sections of the connecting shaft (30);
the insulation assembly comprises an insulation sleeve (5) sleeved on the connecting shaft (30);
the plastic case circuit breaker further comprises a plurality of monopole circuit breakers (900) which are arranged side by side, each monopole circuit breaker (900) comprises a monopole circuit breaker shell (901) and a moving contact which is arranged inside the monopole circuit breaker shell (901) in a rotating mode, kidney-shaped holes (902) which are matched with the movement track of the connecting shaft (30) are formed in two sides of the monopole circuit breaker shell (901), insulating sleeves (5) are arranged on two sides of each moving contact, one end of each insulating sleeve (5) is connected with each moving contact, and the other end of each insulating sleeve protrudes out of the monopole circuit breaker shell (901) through the kidney-shaped holes (902).
2. The molded case circuit breaker according to claim 1, wherein: the connecting shaft (30) comprises a first connecting shaft (301) and a second connecting shaft (302) which is arranged in parallel with the first connecting shaft (301);
the insulating sleeve comprises a first insulating sleeve (50) and a second insulating sleeve (51), and further comprises a ring plate (500) for connecting the first insulating sleeve (50) and the second insulating sleeve (51) and shielding kidney-shaped holes (902), wherein the first insulating sleeve (50) and the second insulating sleeve (51) are respectively arranged at two radial ends of the ring plate (500).
3. The molded case circuit breaker according to claim 1, wherein: the movable contact comprises a contact support (2002) and a contact bridge (2003), wherein a radial through hole (2004) is formed in the middle of the contact support (2002), the contact bridge (2003) is inserted into the radial through hole (2004), and two ends of the contact bridge respectively protrude out of two ends of the radial through hole (2004);
the contact support (2002) is provided with a connecting shaft through hole (2000) for inserting the connecting shaft (30), one end of the insulating sleeve is inserted into the connecting shaft through hole (2000), the other end of the insulating sleeve protrudes out of the single-pole circuit breaker shell (901) through the kidney-shaped hole (902), and the inner diameter of the connecting shaft through hole (2000) is matched with the outer diameter of the insulating sleeve.
4. The molded case circuit breaker according to claim 1, wherein: the movable contact comprises a contact support (2002) and a contact bridge (2003), wherein a radial through hole (2004) is formed in the middle of the contact support (2002), the contact bridge (2003) is inserted into the radial through hole (2004), and two ends of the contact bridge respectively protrude out of two ends of the radial through hole (2004);
the contact support (2002) is provided with a connecting shaft through hole (2000) matched with the connecting shaft (30), the inner diameter of the connecting shaft through hole (2000) is matched with the outer diameter of the connecting shaft (30), counter bores (2006) are formed in two ends of the connecting shaft through hole (2000), the inner diameter of the counter bores (2006) is matched with the outer diameter of an insulating sleeve, one end of the insulating sleeve is inserted into the counter bores (2006), and the other end of the insulating sleeve protrudes out of the single-pole breaker shell (901) through a kidney-shaped hole (902).
5. The molded case circuit breaker according to claim 4, wherein: the insulating sleeve comprises a first insulating sleeve (50) and a second insulating sleeve (51), the length of the second insulating sleeve (51) is greater than that of the first insulating sleeve (50), and one end of the insulating sleeve inserted into the counter bore (2006) is connected with the bottom surface of the counter bore (2006).
6. The molded case circuit breaker according to claim 3 or 4, wherein: the connecting shaft (30) comprises a first connecting shaft (301) and a second connecting shaft (302) which is arranged in parallel with the first connecting shaft (301);
the insulation sleeve comprises a first insulation sleeve (50) and a second insulation sleeve (51), the length of the second insulation sleeve (51) is greater than that of the first insulation sleeve (50), and the outer diameter of the second insulation sleeve (51) is the same as that of the first insulation sleeve (50);
still including being used for connecting annular plate (500) of first insulating cover (50) and second insulating cover (51), first insulating cover (50) and second insulating cover (51) set up radial both ends at annular plate (500) respectively, annular plate (500) card is put between contact support (2002) and corresponding monopole circuit breaker casing (902) and is sheltered from kidney-shaped hole (902), first insulating piece (40) is constituteed to first insulating cover (50), second insulating cover (51) and annular plate (500), first insulating cover (50) include first left end (501) and first right-hand member (502), second insulating cover (51) include second left end (511) and second right-hand member (512), first left end (501) and second left-hand member (511) are located annular plate (500) one side, first left end (501) and second left-hand member (511) parallel and level, first right-hand member (502) and second right-hand member (512) are located annular plate (500) opposite side.
7. The molded case circuit breaker according to claim 3 or 4, wherein: the connecting shaft (30) comprises a first connecting shaft (301) and a second connecting shaft (302) which is arranged in parallel with the first connecting shaft (301); the insulation sleeve comprises a third insulation sleeve (53) and a fourth insulation sleeve (54), the length of the fourth insulation sleeve (54) is greater than the length of the third insulation sleeve (53), and the outer diameter of the fourth insulation sleeve (54) is the same as the outer diameter of the third insulation sleeve (53);
the insulation device further comprises a ring plate (500), the third insulation sleeve (53) comprises a third left end (531) and a third right end (532) which respectively protrude from two sides of the ring plate (500), the fourth insulation sleeve (54) comprises a fourth left end (541) and a fourth right end (542) which protrude from two sides of the ring plate (500), the length of the fourth right end (542) is greater than the length of the fourth left end (541), the length of the fourth right end (542) is greater than the length of the third right end (532), and the length of the fourth left end (541) is the same as the length of the third left end (531);
the ring plate (500), and a third insulating sleeve (53) and a fourth insulating sleeve (54) which are respectively arranged at two radial ends of the ring plate (500) form a second insulating piece (42), a third left end (531) of the third insulating sleeve (53) and a fourth left end (541) of the fourth insulating sleeve (54) are positioned on the same side of the ring plate (500) and are flush, and a third right end (532) of the third insulating sleeve (53) and a fourth right end (542) of the fourth insulating sleeve (54) are positioned on the other side of the ring plate (500);
the ring plate (500) and the two fourth insulating sleeves (54) respectively arranged at the two radial ends of the ring plate (500) form a third insulating piece (43), the fourth left ends (541) of the two fourth insulating sleeves (54) are positioned at one side of the ring plate (500), and the fourth right ends of the two fourth insulating sleeves (54) are positioned at the other side of the ring plate (500).
8. The molded case circuit breaker according to claim 6, wherein: the middle parts of the two axial ends of the contact support (2002) are respectively provided with an annular pillow block, the middle parts of the annular pillow blocks are provided with transmission shaft grooves, and the inner diameter of the annular plate (500) is matched with the outer diameter of the annular pillow block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967915.3A CN109671596B (en) | 2017-10-17 | 2017-10-17 | Plastic case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967915.3A CN109671596B (en) | 2017-10-17 | 2017-10-17 | Plastic case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109671596A CN109671596A (en) | 2019-04-23 |
| CN109671596B true CN109671596B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967915.3A Active CN109671596B (en) | 2017-10-17 | 2017-10-17 | Plastic case circuit breaker |
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| CN2882048Y (en) * | 2006-03-20 | 2007-03-21 | 西安西开高压电气股份有限公司 | Connection mechanism of three-pole breaker |
| CN102255318A (en) * | 2011-06-30 | 2011-11-23 | 辽宁电能发展股份有限公司 | Capacitor breaker and isolation switch device |
| CN203300530U (en) * | 2013-05-27 | 2013-11-20 | 国家电网公司 | Three-location isolation ground switch and its conductive circuit |
| CN204289225U (en) * | 2014-12-25 | 2015-04-22 | 中国西电电气股份有限公司 | The heterogeneous linkage disconnector of a kind of linear pattern |
| CN105448578A (en) * | 2015-11-25 | 2016-03-30 | 河南平芝高压开关有限公司 | Isolation switch and conductor thereof |
| CN207503897U (en) * | 2017-10-17 | 2018-06-15 | 浙江正泰电器股份有限公司 | Breaker of plastic casing |
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2017
- 2017-10-17 CN CN201710967915.3A patent/CN109671596B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2882048Y (en) * | 2006-03-20 | 2007-03-21 | 西安西开高压电气股份有限公司 | Connection mechanism of three-pole breaker |
| CN102255318A (en) * | 2011-06-30 | 2011-11-23 | 辽宁电能发展股份有限公司 | Capacitor breaker and isolation switch device |
| CN203300530U (en) * | 2013-05-27 | 2013-11-20 | 国家电网公司 | Three-location isolation ground switch and its conductive circuit |
| CN204289225U (en) * | 2014-12-25 | 2015-04-22 | 中国西电电气股份有限公司 | The heterogeneous linkage disconnector of a kind of linear pattern |
| CN105448578A (en) * | 2015-11-25 | 2016-03-30 | 河南平芝高压开关有限公司 | Isolation switch and conductor thereof |
| CN207503897U (en) * | 2017-10-17 | 2018-06-15 | 浙江正泰电器股份有限公司 | Breaker of plastic casing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109671596A (en) | 2019-04-23 |
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