Upper isolation fully-sealed circuit breaker switch

Abstract

The utility model relates to an upper isolation fully-sealed circuit breaker switch, which comprises a mechanism frame, a circuit breaker assembly and an isolation switch assembly, and is characterized in that the circuit breaker assembly comprises three epoxy resin casting bodies, three vacuum arc extinguish chambers, three fixing seats, a main shaft, three groups of cam assemblies and three supporting pieces; one ends of the three epoxy resin casting bodies are respectively provided with an insulating cover body covering one sides of the three supporting pieces, the isolating switch assembly comprises an isolating shaft, three isolating knives and a static contact assembly, and the static contact assembly comprises an upper cross beam arranged on the mechanism frame and three static contacts arranged on the upper cross beam respectively. And a plurality of insulating and isolating raised lines are arranged on the upper cross beam corresponding to the positions among the three static contacts. The utility model has the advantages of simple structure, compact structure, high expansibility, stable and reliable performance, good insulation performance and high assembly efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit breaker switch, particularly to an upper isolation full solid seal circuit breaker switch. BACKGROUND

[0002] The ring main unit is a group of power transmission and distribution electrical equipment, which is installed in a metal or non-metal insulation cabinet or made into a power supply unit of assembled interval type ring network, and generally adopts sulfur hexafluoride gas, environment-friendly gas or epoxy resin as insulation medium. For the rapidly developing power industry, using environment-friendly gas as insulation medium will be an important trend for the future development of switch industry. The existing circuit breaker switch used in the environment-friendly gas cabinet has the advantage of maintenance-free characteristic. The switch adopts a sealed box structure, which has no threat of gas leakage and can effectively isolate external contaminants, dust and acid mist pollution, ensuring the cleanliness of the operating environment of the busbar, circuit breaker, isolation knife and grounding knife and their service life, achieving the purpose of maintenance-free, thereby greatly reducing the investment in distribution network operation and management. The existing circuit breaker switch has a small creepage distance between the three cam fixed seats, poor interphase insulation performance, great safety hazards and low safety, and the circuit breaker switch also has defects of complex structure, non-compact structure design, large size, complicated assembly and unreliable performance. SUMMARY

[0003] The utility model aims at overcoming the defects of prior art, and provides an upper isolation full solid seal circuit breaker switch which has simple structure, compact structure, high expandability, stable and reliable performance, good insulation performance and high assembly efficiency.

[0004] To achieve the above-mentioned purpose, the utility model adopts an upper isolation full solid seal circuit breaker switch which comprises a mechanism frame, a circuit breaker assembly arranged on the mechanism frame and an isolation switch assembly arranged on the mechanism frame. The circuit breaker assembly comprises three epoxy resin castings arranged on the mechanism frame, three vacuum arc-extinguishing chambers arranged in the three epoxy resin castings, three fixed seats arranged in the accommodation cavities at one end of the three epoxy resin castings respectively, a main shaft rotatably arranged on the three fixed seats, three sets of cam assemblies rotatably arranged on the main shaft and used for driving the three sets of vacuum arc-extinguishing chambers to perform opening and closing actions, and three supporting pieces arranged on the other end of the three epoxy resin castings respectively and electrically connected with the three vacuum arc-extinguishing chambers. One end of the three epoxy resin castings is respectively provided with an insulation cover body which covers one side of the three supporting pieces. The isolation switch assembly comprises an isolation shaft rotatably arranged on the mechanism frame, three isolation knives rotatably arranged on the three supporting pieces and linked with the isolation shaft, and a static contact assembly arranged on the mechanism frame and matched with the three isolation knives. The static contact assembly comprises an upper cross beam arranged on the mechanism frame and three static contacts arranged on the upper cross beam respectively. A plurality of insulation isolation protrusions are arranged between the three static contacts on the upper cross beam respectively.

[0005] The beneficial effects of the above structure are that the three vacuum arc-extinguishing chambers of the circuit breaker switch are arranged in the epoxy resin pouring bodies respectively, a full solid sealing structure design is adopted, the structure design is more compact and small, the protection performance is better, and the insulation and electrical performance are better. The insulation cover of the epoxy resin pouring body covers the support members, the insulation distance between the three support members can be increased, the three-phase insulation performance is better, and the insulation isolation protrusions on the upper cross beam can increase the insulation distance between the three static contacts, the three-phase insulation performance is better. Moreover, the circuit breaker assembly and the disconnector assembly are designed in a modular structure, and the assembly is more convenient. Therefore, the lower isolation full solid sealing circuit breaker switch has the advantages of simple structure, compact structure, small size, stable and reliable performance, good insulation performance, and high assembly efficiency.

[0006] In particular, the upper cross beam is provided with a buffer pad corresponding to each of the three static contacts and matched with the three isolation knives. The buffer pad can buffer the isolation knives, so that the contact between the isolation knives and the static contacts is more reliable, and the mechanical life is longer.

[0007] In particular, the main shaft is provided with an insulation isolation disc that is separated between the three epoxy resin pouring bodies. The insulation isolation disc can increase the three-phase insulation distance of the circuit breaker assembly, and the insulation performance is better.

[0008] In particular, the mechanism frame is provided with a grounding contact assembly matched with the three isolation knives, the grounding contact assembly includes a support plate arranged on the mechanism frame, a grounding conductive row arranged on the support plate, three grounding contacts arranged on the grounding conductive row and matched with the three isolation knives, and three buffer pad plates arranged on the support plate and matched with the three isolation knives. The grounding contact assembly is designed in a modular structure, which is conducive to the modular assembly of the circuit breaker switch, and the buffer pad plates buffer the isolation knives, so that the isolation knives can reliably contact the grounding contacts and reduce damage.

[0009] In particular, the support plate is provided with three insulation transparent covers corresponding to the three grounding contacts, and the three insulation transparent covers are provided with arc-shaped insulation isolation channels matched with the movement tracks of the three isolation knives. The insulation transparent covers can increase the insulation distance of the three isolation knives, and the three-phase insulation performance is better.

[0010] In particular, the pull rod of the vacuum arc-extinguishing chamber is provided with a flexible connection, both sides of the fixing seat are provided with two fixing holes matched with the flexible connection, and the conductive copper row of the flexible connection is provided with a bolt connected with the fixing hole. Two fixing holes are arranged on both sides of the fixing seat, so that the flexible connection can be led out on both sides, the purpose of bidirectional expansion is achieved, the flexible connection can be assembled flexibly according to the needs of users, the expansion is high, and the users can use more conveniently.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the perspective view for the embodiment of the utility model.

[0012] Fig. 2 It is the sectional view for the embodiment of the utility model.

[0013] Fig. 3 It is the exploded view for the embodiment of the utility model. DETAILED DESCRIPTION

[0014] As Figs. 1-3 shown, the utility model embodiment is a kind of upper isolation full solid sealed circuit breaker switch, including mechanism frame 10, be set on the circuit breaker assembly 20 of mechanism frame 10, be set on the isolating switch assembly 30 of mechanism frame 10, the circuit breaker assembly 20 include three epoxy resin castings 21 being set on mechanism frame 10, three vacuum interrupters 22 being set in three epoxy resin castings 21, three fixed bases 23 being set in the accommodation cavity 211 of one end of three epoxy resin castings 21 respectively, main shaft 24 being rotatably set on three fixed bases 23, three cam assemblies 25 being rotatably set on main shaft 24 and being used to drive three groups of vacuum interrupters 22 to execute opening and closing operation, three support pieces 26 being set on the other end of three epoxy resin castings 21 respectively and being electrically connected with three vacuum interrupters 22, the one end of three epoxy resin castings 21 respectively has insulating cover body 212 covered on one side of three support pieces 26, the isolating switch assembly 30 includes isolating shaft 31 being rotatably set on mechanism frame 10, three isolating knives 32 being rotatably set on three support pieces 26 respectively and being linked with isolating shaft 31, static contact assembly 33 being set on mechanism frame 10 and being matched with three isolating knives 32, the static contact assembly 33 includes upper cross beam 331 being set on mechanism frame 10, three static contacts 332 being set on upper cross beam 331 respectively, the upper cross beam 331 is respectively provided with multiple insulating isolation convex strips 333 between corresponding three static contacts 332.The upper cross beam 331 is respectively provided with buffer pad 334 matched with three isolating knives 32 at corresponding three static contacts 332.The buffer piece can play the role of buffering for isolating knife, so that the contact of isolating knife and static contact can be more reliable, and mechanical life is longer.The main shaft 24 is respectively provided with insulating isolation disc 241 being separated between three epoxy resin castings 21.The insulating isolation disc can increase the three-phase insulation spacing of circuit breaker assembly, and the insulation performance is better.

[0015] As Fig. 2 and 3As shown, the mechanism frame 10 is provided with a grounding contact assembly 40 matched with the three isolation knives 32, the grounding contact assembly 40 comprises a support plate 41 provided on the mechanism frame 10, a grounding conductive row 42 provided on the support plate 41, three grounding contacts 43 respectively provided on the grounding conductive row 42 and matched with the three isolation knives 32, and three buffer pad plates 44 respectively provided on the support plate 41 corresponding to the three grounding contacts 43 and matched with the three isolation knives 32. The grounding contact assembly adopts a modular structure design, which is beneficial to realize the modular assembly of the circuit breaker switch, and the buffer pad plates play a buffering role on the isolation knives, so that the reliable contact of the isolation knives and the grounding contacts can be ensured. The support plate 41 is provided with three insulating transparent covers 45 corresponding to the three grounding contacts 43, and the three insulating transparent covers 45 are respectively provided with arc-shaped insulating isolation channels 451 matched with the movement tracks of the three isolation knives 32. The insulating transparent covers can increase the insulation distance of the three isolation knives, and the three-phase insulation performance is better. The pull rod 221 of the vacuum arc-extinguishing chamber 22 is provided with a flexible connection 27, both sides of the fixed seat 23 are respectively provided with two fixed holes 231 matched with the flexible connection 27, and the conductive copper row 271 of the flexible connection 27 is provided with a bolt connected with the fixed hole 231. Two fixed holes are provided on both sides of the fixed seat, so that the bilateral lead-out of the flexible connection can be realized, the purpose of bidirectional expansion is realized, the flexible connection can be flexibly assembled according to the needs of users, the expansibility is high, and the users use more conveniently.

[0016] The three vacuum arc-extinguishing chambers of the circuit breaker switch are respectively arranged in the epoxy resin pouring body, adopt a full-sealed structure design, the structure design is more compact and small, the protection performance is better, and the insulation and electrical performance are better. The insulating cover body of the epoxy resin pouring body covers the support, which can increase the insulation distance between the three support, the three-phase insulation performance is better, and the insulating isolation protrusions on the upper cross beam can increase the insulation distance between the three static contacts, the three-phase insulation performance is better. Moreover, the circuit breaker assembly and the disconnector assembly adopt a modular structure design, which is more convenient to assemble. Therefore, the lower isolation full-sealed circuit breaker switch has the advantages of simple structure, compact structure, high expansibility, stable and reliable performance, good insulation performance, and high assembly efficiency.

Claims

1. A top-isolated, fully enclosed circuit breaker switch, characterized in that: The system includes a frame, a circuit breaker assembly mounted on the frame, and a disconnecting switch assembly mounted on the frame. The circuit breaker assembly includes three epoxy resin castings mounted on the frame, three vacuum interrupters within the three epoxy resin castings, three fixed seats within cavities at one end of each of the three epoxy resin castings, a main shaft rotatably mounted on the three fixed seats, three cam assemblies rotatably mounted on the main shaft for driving the three vacuum interrupters to perform opening and closing actions, and cams electrically mounted on the other end of each of the three epoxy resin castings and connected to the three vacuum interrupters. The three connected support members, each of the three epoxy resin castings having an insulating cover covering one side of the three support members, the disconnecting switch assembly includes an isolation shaft rotatably mounted on the frame, three isolation blades rotatably mounted on the three support members and linked with the isolation shaft, and a stationary contact assembly mounted on the frame and cooperating with the three isolation blades. The stationary contact assembly includes an upper crossbeam mounted on the frame and three stationary contacts mounted on the upper crossbeam. Multiple insulating isolation protrusions are respectively provided on the upper crossbeam between the three stationary contacts.

2. The top-isolated fully enclosed circuit breaker switch according to claim 1, characterized in that: The upper crossbeam is provided with buffer pads that cooperate with the three isolation blades at the three stationary contacts.

3. The top-isolated fully enclosed circuit breaker switch according to claim 1 or 2, characterized in that: The main shaft is provided with insulating isolation disks that separate the three epoxy resin castings.

4. The top-isolated fully enclosed circuit breaker switch according to claim 1 or 2, characterized in that: The mechanism frame is provided with a grounding contact assembly that cooperates with three isolation blades. The grounding contact assembly includes a support plate on the mechanism frame, a grounding conductive bus on the support plate, and three grounding contacts respectively disposed on the grounding conductive bus and cooperating with the three isolation blades. The support plate is provided with three buffer pads corresponding to the three grounding contacts and cooperating with the three isolation blades.

5. The top-isolated fully enclosed circuit breaker switch according to claim 4, characterized in that: The support plate is provided with three insulating transparent covers at the three grounding contacts, and each of the three insulating transparent covers is provided with an arc-shaped insulating isolation channel that matches the movement trajectory of the three isolation blades.

6. The top-isolated fully enclosed circuit breaker switch according to claim 1 or 2, characterized in that: The vacuum interrupter is equipped with a flexible connection on its pull rod, and two fixing holes that mate with the flexible connection are respectively provided on both sides of the fixing base. The conductive copper busbar of the flexible connection is equipped with bolts that connect with the fixing holes.

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