A common box type circuit breaker switch

Abstract

This utility model relates to a common-enclosure circuit breaker switch, comprising a frame, three fixed-seal poles, a circuit breaker main shaft, three sets of transmission cam assemblies, an isolation main shaft, three isolation blades, three moving contact seats, and a grounding contact assembly. The moving contact seat includes an insulating cast body and a conductive element disposed within the insulating cast body. One end of the insulating cast body has an insulating cover, and one end of the conductive element has a contact portion extending within the insulating cover. The other end of the insulating cast body has two symmetrically distributed insulating baffles, forming an insulating isolation space between the two baffles. The other end of the conductive element has a wiring portion extending within the insulating isolation space, and this wiring portion is provided with a wiring hole. This utility model has the advantages of simple structure, stable and reliable performance, good insulation performance, and high assembly efficiency.

Description

Technical Field

[0001] The utility model relates to a circuit breaker switch, in particular to a common box type circuit breaker switch. Background Art

[0002] The ring main unit is a group of electrical transmission and distribution equipment, which is installed in a metal or non-metallic insulating cabinet or made into an assembled interval ring network power supply unit. It usually uses sulfur hexafluoride gas, environmentally friendly gas, or epoxy resin as an insulating medium. In view of the rapidly developing power industry, the use of environmentally friendly gas as an insulating medium will be an important trend in the future development of the switch industry. The advantage of the existing circuit breaker switch used in the environmentally friendly gas cabinet is its maintenance-free characteristics. The switch adopts a normal pressure sealed box structure, without the threat of gas leakage, and can effectively isolate the pollution of external dirt, dust, and acid mist, ensuring the cleanliness of the operating environment of its busbar, circuit breaker, isolation knife, and grounding knife and its service life, achieving the purpose of maintenance-free, thereby greatly reducing the investment in distribution network operation and maintenance management. The existing common box type environmentally friendly gas cabinet is equipped with multiple circuit breaker switches. The insulation performance of the circuit breaker switch of the common box type environmentally friendly gas cabinet is poor, the air creepage distance between the three phases is small, the phase insulation performance is poor, and the safety is low. In addition, the circuit breaker switch also has the defects of complex structure, inconvenient assembly, and unreliable performance. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a common box type circuit breaker switch with simple structure, stable and reliable performance, good insulation performance and high assembly efficiency.

[0004] To achieve the above-mentioned purpose, the utility model adopts a common box type circuit breaker switch, including a mechanism frame, three sealed poles arranged on the mechanism frame, a circuit breaker main shaft rotatably arranged on the mechanism frame, three groups of transmission cam components that cooperate with the circuit breaker main shaft and are used to drive the three sealed poles to perform opening and closing, an isolation main shaft rotatably arranged on the mechanism frame, three isolation knives that are rotatably arranged on the three sealed poles and cooperate with the isolation main shaft, three moving contact seats arranged on the fixed beam of the mechanism frame and cooperate with the three isolation knives, and a grounding contact assembly arranged on the mechanism frame and cooperate with the three isolation knives. The moving contact seat includes an insulating cast body and a conductive member arranged in the insulating cast body, one end of the insulating cast body has an insulating cover, one end of the conductive member has a contact portion extending in the insulating cover, the other end of the insulating cast body has two symmetrically distributed insulating baffles, an insulating isolation space is formed between the two insulating baffles, and the other end of the conductive member has a wiring portion extending in the insulating isolation space, and a wiring hole is arranged on the wiring portion.

[0005] The beneficial effects of the above structure are: the moving contact seat is cast into an integrated structure with epoxy resin, the structural design is simpler, the insulation performance is better, and the contact piece part is arranged in the insulation cover, and the wiring part is arranged in the insulation isolation space, so that the insulation performance between the three moving contact seats can be effectively enhanced, and the phase-to-phase insulation performance is more reliable. The circuit breaker switch adopts a sealed pole structure design, which has better insulation performance and is more convenient to assemble. Therefore, the circuit breaker switch has the advantages of simple structure, stable and reliable performance, good insulation performance, and high assembly efficiency.

[0006] In particular, the sealed pole comprises an epoxy resin casting, a vacuum interrupter arranged in the epoxy resin casting, and a conductive copper piece arranged on one end of the vacuum interrupter, one end of the conductive copper piece extends outside the epoxy resin casting and is rotatably connected to one end of the isolation knife, and the other end of the isolation knife has a moving contact that passes through the sleeve of the isolation main shaft and cooperates with the contact piece. The sealed pole is cast into an integrated structure with epoxy resin, and has better insulation performance, and the sleeve of the isolation main shaft is wrapped on the isolation knife, which can enhance the phase-to-phase insulation performance between the three isolation knives.

[0007] In particular, one end of the contact piece has two symmetrically distributed positioning contact blocks that match the isolation knife, and the other end of the contact piece has two symmetrically distributed guiding inclined surfaces that match the isolation knife. The positioning contact blocks can position the isolation knife, and the guiding inclined surfaces can guide the isolation knife, thereby ensuring that the isolation knife and the contact piece are more reliable.

[0008] In particular, one end of the insulating cover has a vertically bent mounting seat, on which two copper inserts are respectively provided, and the two copper inserts are respectively provided with screws connected to the fixing beam of the mechanism frame. The two copper inserts are arranged in the mounting seat, so as to facilitate the assembly of the moving contact seat and the mechanism frame, and the assembly is more convenient.

[0009] In particular, a plurality of insulating convex strips are respectively arranged on the outer wall of the mounting seat corresponding to the two copper inserts. The insulating convex strips can increase the creepage distance of the moving contact seat and provide better insulation performance.

[0010] In particular, the grounding contact assembly includes a grounding beam arranged on the mechanism frame, a grounding copper bar arranged on the grounding beam, and three grounding contacts respectively arranged on the grounding copper bar and matched with three isolation blades. The cross-sectional shape of the grounding beam is L-shaped, and the two ends of the grounding beam are respectively provided with snap-fitting protrusions, and the snap-fitting protrusions are snapped into the snap-fitting holes of the mechanism frame to form a snap-fitting fit between the grounding beam and the mechanism frame. The grounding contact assembly adopts a modular structural design, and the grounding beam and the mechanism frame are assembled in a snap-fitting manner, thereby facilitating the modular assembly of the grounding contact assembly and the mechanism frame.

[0011] In particular, the grounding contact is in a T-shape, and one side of the grounding beam abuts against one side of the grounding contact, and forms a limit fit between the grounding contact and the grounding beam. One side of the grounding beam abuts against the grounding contact, which can ensure that the connection between the grounding contact and the grounding copper bar and the grounding beam is more compact, and the grounding contact adopts a T-shaped structural design, which can ensure that the contact between the grounding contact and the isolation knife is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a stereogram of an embodiment of the utility model.

[0013] Figure 2 It is a cross-sectional view of an embodiment of the utility model.

[0014] Figure 3 It is the front view of the embodiment of the utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 3 As shown, the embodiment of the utility model is a common box type circuit breaker switch, including a mechanism frame 10, three sealed poles 11 arranged on the mechanism frame 10, a circuit breaker main shaft 12 rotatably arranged on the mechanism frame 10, three groups of transmission cam components 13 that are linked with the circuit breaker main shaft 12 and used to drive the three sealed poles 11 to perform opening and closing, an isolation main shaft 14 rotatably arranged on the mechanism frame 10, three isolation knives 15 rotatably arranged on the three sealed poles 11 and linked with the isolation main shaft 14, three moving contact seats 16 arranged on the mechanism frame 10 and matched with the three isolation knives 15, and a contact seat 16 arranged on the mechanism frame 10 and matched with the three isolation knives 15. The grounding contact assembly 17 is combined, and the moving contact seat 16 includes an insulating casting body 161 and a conductive member 162 arranged in the insulating casting body 161. One end of the insulating casting body 161 has an insulating cover 1611, and one end of the conductive member 162 has a contact portion 1621 extending in the insulating cover 1611. The other end of the insulating casting body 161 has two symmetrically distributed insulating blocking pieces 1612, and an insulating isolation space 1610 is formed between the two insulating blocking pieces 1612. The other end of the conductive member 162 has a wiring portion 1622 extending in the insulating isolation space 1610, and the wiring portion 1622 is provided with a wiring hole 1623.

[0016] The solid-sealed pole 11 comprises an epoxy resin casting body 111, a vacuum arc extinguishing chamber 112 arranged in the epoxy resin casting body 111, and a conductive copper piece 113 arranged at one end of the vacuum arc extinguishing chamber 112. One end of the conductive copper piece 113 extends outside the epoxy resin casting body 111 and is rotatably connected to one end of the isolation knife 15. The other end of the isolation knife 15 has a moving contact 151 that passes through the sleeve 141 of the isolation main shaft 14 and cooperates with the contact piece 1621. The solid-sealed pole is cast into an integrated structure with epoxy resin, which has better insulation performance, and the sleeve of the isolation main shaft is wrapped on the isolation knife, which can enhance the phase-to-phase insulation performance between the three isolation knives. One end of the contact piece 1621 has two positioning contact blocks 1624 that are symmetrically distributed and cooperate with the isolation knife 15, and the other end of the contact piece 1621 has two guiding inclined surfaces 1625 that are symmetrically distributed and cooperate with the isolation knife 15. The positioning contact block can play a positioning role for the isolation knife, and the guiding bevel can play a guiding role for the isolation knife, thereby ensuring that the contact between the isolation knife and the contact piece is more reliable. The insulating cover 1611 has a vertically bent mounting seat 1613 at one end, and two copper inlays 163 are respectively provided on the mounting seat 1613, and screws 164 connected to the fixed beam 101 of the mechanism frame 10 are respectively provided on the two copper inlays 163. The two copper inlays 163 are respectively provided with screws 164 connected to the fixed beam 101 of the mechanism frame 10. The two copper inlays are arranged in the mounting seat, so as to facilitate the assembly of the moving contact seat and the mechanism frame, and the assembly is more convenient. A plurality of insulating convex strips 1614 are respectively arranged on the outer wall of the mounting seat 1613 corresponding to the two copper inlays 163. The insulating convex strips can increase the creepage distance of the moving contact seat, and the insulation performance is better.

[0017] like Figure 1 and 2 As shown, the grounding contact assembly 17 comprises a grounding beam 171 arranged on the mechanism frame 10, a grounding copper bar 172 arranged on the grounding beam 171, and three grounding contacts 173 respectively arranged on the grounding copper bar 172 and matched with three isolation blades 15. The cross-sectional shape of the grounding beam 171 is L-shaped, and the two ends of the grounding beam 171 are respectively provided with snap-fitting protrusions 1711, and the snap-fitting protrusions 1711 snap into the snap-fitting holes 102 of the mechanism frame 10, and form the snap-fitting of the grounding beam 171 and the mechanism frame 10. The grounding contact assembly adopts a modular structural design, and the grounding beam and the mechanism frame are assembled in a snap-fitting manner, so as to facilitate the modular assembly of the grounding contact assembly and the mechanism frame. The grounding contact 173 is T-shaped, and one side of the grounding beam 171 abuts against one side of the grounding contact 173, and forms the limiting fit of the grounding contact 173 and the grounding beam 171. One side of the grounding beam abuts against the grounding contact, which can ensure that the connection between the grounding contact and the grounding copper bus and the grounding beam is more compact, and the grounding contact adopts a T-shaped structure design, which can ensure that the contact between the grounding contact and the isolation knife is more reliable.

[0018] The moving contact seat is cast into an integrated structure with epoxy resin, which has a simpler structural design and better insulation performance. The contact piece part is arranged in the insulation cover, and the wiring part is arranged in the insulation isolation space, so that the insulation performance between the three moving contact seats can be effectively enhanced, and the phase-to-phase insulation performance is more reliable. The circuit breaker switch adopts a sealed pole structure design, which has better insulation performance and is more convenient to assemble. Therefore, the circuit breaker switch has the advantages of simple structure, stable and reliable performance, good insulation performance, and high assembly efficiency.

Claims

1. A common box type circuit breaker switch, characterized in that: It includes a mechanism frame, three sealed poles arranged on the mechanism frame, a circuit breaker main shaft rotatably arranged on the mechanism frame, three groups of transmission cam components that cooperate with the circuit breaker main shaft and are used to drive the three sealed poles to perform opening and closing, an isolation main shaft rotatably arranged on the mechanism frame, three isolation knives that are rotatably arranged on the three sealed poles and cooperate with the isolation main shaft, three moving contact seats arranged on the fixed beam of the mechanism frame and cooperate with the three isolation knives, and a grounding contact assembly arranged on the mechanism frame and cooperate with the three isolation knives. The moving contact seat includes an insulating cast body and a conductive part arranged in the insulating cast body. One end of the insulating cast body has an insulating cover, one end of the conductive part has a contact part extending in the insulating cover, the other end of the insulating cast body has two symmetrically distributed insulating baffles, an insulating isolation space is formed between the two insulating baffles, and the other end of the conductive part has a wiring part extending in the insulating isolation space, and a wiring hole is arranged on the wiring part.

2. The common box type circuit breaker switch according to claim 1, characterized in that: The sealed pole includes an epoxy resin casting body, a vacuum arc extinguishing chamber arranged in the epoxy resin casting body, and a conductive copper piece arranged on one end of the vacuum arc extinguishing chamber. One end of the conductive copper piece extends outside the epoxy resin casting body and is rotatably connected to one end of the isolation knife. The other end of the isolation knife has a sleeve that passes through the isolation main shaft and a moving contact that cooperates with the contact piece.

3. The common box type circuit breaker switch according to claim 1 or 2, characterized in that: One end of the contact piece part has two positioning contact blocks which are symmetrically distributed and matched with the isolation knife, and the other end of the contact piece part has two guiding inclined surfaces which are symmetrically distributed and matched with the isolation knife.

4. The common box type circuit breaker switch according to claim 1 or 2, characterized in that: One end of the insulating cover is provided with a vertically bent mounting seat, on which two copper inserts are respectively arranged, and on which screws connected with the fixing beam of the mechanism frame are respectively arranged.

5. The common box type circuit breaker switch according to claim 4, characterized in that: A plurality of insulating convex strips are respectively arranged on the outer wall of the mounting seat corresponding to the two copper inserts.

6. The common box type circuit breaker switch according to claim 1 or 2, characterized in that: The grounding contact assembly includes a grounding beam arranged on the mechanism frame, a grounding copper bar arranged on the grounding beam, and three grounding contacts respectively arranged on the grounding copper bar and matched with three isolation knives. The cross-sectional shape of the grounding beam is L-shaped, and the two ends of the grounding beam are respectively provided with snap-fitting protrusions, and the snap-fitting protrusions are snapped into the snap-fitting holes of the mechanism frame to form a snap-fitting fit between the grounding beam and the mechanism frame.

7. The common box type circuit breaker switch according to claim 6, characterized in that: The grounding contact is in a T-shape, and one side of the grounding beam abuts against one side of the grounding contact, thereby forming a limiting fit between the grounding contact and the grounding beam.

Images