CN112531546A

CN112531546A - Hybrid insulated switchgear

Info

Publication number: CN112531546A
Application number: CN202011417338.9A
Authority: CN
Inventors: 王伟平; 孙龙; 唐晓鹏; 李维; 赵凯; 齐佳伟; 张东旭
Original assignee: Beijing Sojo Electric Co Ltd
Current assignee: Beijing Sojo Electric Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-19

Abstract

The invention discloses a hybrid insulated switchgear, and relates to a switchgear for a high-voltage electrical apparatus. The hybrid insulated switchgear is miniaturized, light in weight, convenient to use and install, and capable of being switched on and off in a large capacity mode. The mixed insulation switch equipment comprises a switch instrument room, a mechanism room and a cable bin which are mutually independent, wherein a circuit breaker and an isolation mechanism are arranged in the mechanism room, the circuit breaker is connected with a cable in the cable bin through an outgoing line copper bar and a lead, an outgoing line static contact is arranged on the circuit breaker and is rotationally connected with an isolation knife, the power for rotating the isolation knife is provided by the isolation mechanism, the isolation knife has three stations, namely a grounding station, an isolation station and a closing station when rotating, when the isolation knife is in contact with the closing contact, the closing contact is arranged on an upper bus copper bar, and the upper bus copper bar is connected with a main bus copper bar.

Description

Hybrid insulated switchgear

Technical Field

The invention relates to the technical field of high-voltage switches, in particular to hybrid insulated switchgear.

Background

In recent years, with the rapid development of socioeconomic construction, the complexity of various engineering constructions is gradually increased, the use frequency of the switch is required to be higher, and the miniaturization, intellectualization and maintenance-free products of the switch equipment are favored by the society more and more. The original 35kV C-GIS switchgear is divided into a breaker part and an isolation part, the two parts are relatively independent, and the cabinet splicing is realized by an independent structure of a gas distribution box, so that the structure is generally complex, the equipment is often complex in assembly and maintenance, and the production and the use of customers are inconvenient. And the overall structure has large size, low space utilization rate and limited application range, and is difficult to complete the task of switching on and off the large current. The isolation knife is difficult to realize the current-carrying task of large current in the existing switch industry, the main reason is the difficult point of current conduction of the contact surface, and the isolation structure is complex in design and cannot well realize transmission.

In the face of the increasingly competitive power market, the development of a miniaturized and intelligent high-capacity switch device is an urgent problem to be solved in the market.

Disclosure of Invention

The invention aims to provide a hybrid insulated switchgear which is small and light, is convenient to use and install and can be switched on and off in a large capacity.

The invention discloses a hybrid insulated switchgear, which comprises a switch instrument room, a mechanism room and a cable bin which are mutually independent, wherein a circuit breaker and an isolation mechanism are arranged in the mechanism room, the circuit breaker is connected with a cable in the cable bin through an outgoing line copper bar and a lead, an outgoing line static contact is arranged on the circuit breaker and is rotationally connected with an isolation knife, the power for rotating the isolation knife is provided by the isolation mechanism, the isolation knife has three stations, namely a grounding station, an isolation station and a closing station when rotating, the isolation knife is a closing station when contacting with the closing contact, the closing contact is arranged on an upper bus copper bar, and the upper bus copper bar is connected with a main bus copper bar.

The power output shaft of the isolation mechanism is connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is connected with a main transmission shaft, the main transmission shaft drives an output crank arm to reciprocate, the output crank arm drives an insulating pull rod to move, and the insulating pull rod is connected with an isolation knife.

The invention relates to a hybrid insulated switchgear, wherein when the isolation knife is in a grounding station, the isolation knife is in contact with a grounding contact, and the grounding contact is mounted on a current-carrying bar.

According to the hybrid insulated switchgear, watchband contact fingers are arranged at the joints of the isolation knife, the grounding contact and the closing contact.

The invention relates to a hybrid insulated switchgear, wherein a main bus copper bar is connected with a cabinet combining inner cone.

According to the hybrid insulated switchgear, a spring contact finger is arranged at the joint of the outgoing line static contact and the isolation knife.

The invention relates to a hybrid insulated switchgear, wherein the lower part of a mechanism chamber is provided with a wire outlet sleeve, and the wire outlet sleeve is communicated with the mechanism chamber and a cable bin.

According to the mixed insulation switch device, one end of the wire outlet sleeve is connected with the wire outlet copper bar, and the other end of the wire outlet copper bar is connected with the circuit breaker.

The mixed insulation switch device is characterized in that the outgoing line sleeve is a C-shaped sleeve.

The invention relates to a hybrid insulated switchgear, wherein an intelligent controller and an instrument of the switchgear are arranged in a switchgear instrument room.

The hybrid insulated switchgear is different from the prior art in that the hybrid insulated switchgear fuses a circuit breaker and an isolation part to realize a common gas tank structure of the circuit breaker and an isolation mechanism, the circuit breaker and the isolation mechanism are integrated and assembled in one gas tank to realize product integration and miniaturization, and in the design of the hybrid insulated switchgear, the movable positions all adopt the form of contact fingers, so that the possibility of large capacity of a switch is realized, and the circuit breaker is combined to realize the on-off and the on-off of a large capacity switch of the switchgear.

The hybrid insulated switchgear of the present invention will be further described with reference to the accompanying drawings.

Drawings

Fig. 1 is a front view of a hybrid insulated switchgear of the present invention;

fig. 2 is a schematic view of the internal structure of the hybrid insulated switchgear of the present invention;

fig. 3 is a rear view of the hybrid insulated switchgear of the present invention;

FIG. 4 is a top view of the isolating blade drive section of the hybrid insulated switchgear of the present invention;

FIG. 5 is a front view of the isolating blade drive section of the hybrid insulated switchgear of the present invention;

FIG. 6 is a side view of the isolating blade drive section of the hybrid insulated switchgear of the present invention;

the notation in the figures means: 1-instrument room; 2-a mechanism chamber; 3-a cable compartment; 4-a circuit breaker mechanism; 5-an isolation mechanism; 6-a wire outlet sleeve; 7-a line outlet copper bar; 8-a circuit breaker; 81-fixed contact of outgoing line; 9-an isolation knife; 10-a ground contact; 11-a closing contact; 12-upper bus copper bar; 13-combining inner cones; 14-main bus copper bar; 15-a power take-off shaft; 16-a first bevel gear; 17-a second bevel gear; 18-a main drive shaft; 19-output crank arm; 20-insulating pull rod.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1 to 3, the hybrid insulated switchgear of the present invention includes an outer casing, and a switch instrument room 1, a mechanism room 2, and a cable chamber 3 are sequentially disposed inside the outer casing from top to bottom. The intelligent controller and the instrument are arranged in the switch instrument room 1, so that the height size of the switch equipment can be effectively reduced and the switch size is reduced; a circuit breaker mechanism 4 and an isolation mechanism 5 are arranged in the mechanism chamber 2; the cable compartment 3 is a cable arrangement space which serves as a cable compartment for the access lines of the switchgear. The compartments are relatively independent, so that the safety and the reliability of the switch device can be ensured.

The lower part of the mechanism chamber 2 is provided with a wire outlet sleeve 6, and the wire outlet sleeve 6 is communicated with the mechanism chamber 2 and the cable bin 3. The outgoing line sleeve 6 can also be used as an incoming line sleeve, the outgoing line sleeve 6 at the position is a C-shaped standard sleeve, the cable is suitable for standard cable accessories, and the universality is high. One end of the outgoing line sleeve 6 is connected with an outgoing line copper bar 7, and the other end of the outgoing line copper bar 7 is connected with a circuit breaker 8.

The breaker 8 is provided with an outlet static contact 81, the outlet static contact 81 is rotatably connected with the isolation knife 9, and the isolation knife 9 can rotate around the outlet static contact 81. The connection part of the outlet static contact 81 and the isolation knife 9 is provided with a spring contact finger, the spring contact finger can realize high-capacity flow guide, the positioning and the supporting of the movement and the rotation of the isolation knife 9 are realized, the number of supporting parts is reduced, the structure is simplified, and redundant supporting is not needed to be used as a main supporting of a product.

The isolation knife 9 has three working states, namely three stations, namely a grounding station, an isolation station and a closing station. When the isolation knife 9 is connected with the grounding contact 10, the grounding station is formed, and the grounding contact 10 is arranged on the current-carrying row; the isolation knife 9 rotates clockwise for a certain angle, such as 40 degrees, and does not contact with the grounding contact 10 or the closing contact 11 at the moment, and the isolation station is at the moment; when the isolation knife 9 contacts with the closing contact 11, the isolation knife is a closing station, namely, a main circuit is closed, and the closing contact 11 is arranged on the upper bus copper bar 12.

As shown in fig. 4-6, the rotation of the isolation knife 9 is driven by the isolation mechanism 5, the power output shaft 15 of the isolation mechanism 5 is connected with a first bevel gear 16, and the first bevel gear 16 is meshed with a second bevel gear 17. Vertical rotary motion is converted into horizontal rotary motion by the two bevel gears, the two bevel gears can change the rotation angle of the isolation knife 9 through the transformation ratio, the rotation angle of the isolation knife 9 can be freely adjusted, and the switching-on safety and reliability of the switch are guaranteed. The second bevel gear 17 is connected with a main transmission shaft 18, the main transmission shaft 18 drives an output crank arm 19 to reciprocate, the output crank arm 19 drives an insulating pull rod 20 to move, and the insulating pull rod 20 is connected with the isolation knife 9, so that the rotary motion of the isolation knife 9 is realized. The isolation mechanism 5 is a three-station mechanism, the isolation movement is driven by a transmission system to realize the switching among the three stations, and the transmission is simple, convenient, safe and reliable.

Watchband contact fingers are arranged at the joints of the isolation knife 9, the grounding contact 10 and the closing contact 11, and the application of the watchband contact fingers to planar contact is a key factor for improving the current grade of the isolation knife 9 and is a core design for improving the capacity of a product, so that the high-current grade of the disconnecting link is realized and is not lower than 1250A. The watchband is internally provided with a spring, the isolation knife 9 switch uses a spring operating mechanism, the possibility of instantaneous movement of the knife switch is realized, the instantaneous switching-on and switching-off process of the product when the product is in contact with the contact is ensured, and effective guarantee and safe use are provided for the safety and reliability of the circuit.

The upper bus copper bar 12 is connected with a main bus copper bar 14, and the main bus copper bar 14 is connected with a combined cabinet inner cone 13. The inner cone is a standard cable accessory for realizing cabinet combination with other products, can realize the cabinet combination requirement with other products or the same product, and realizes the communication with the upper end. The inner cone 13 of the cabinet combination can adjust the built-in position according to the position requirement, and the cabinet combination is matched with other cabinet types, so that seamless butt joint is realized.

The closing contact 11 and the grounding contact 10 are both installed on the current-carrying row, so that the current-carrying row is used as a main supporting structure, the main design idea that the product can be miniaturized and lightened is achieved, and the main guarantee that the product can be reliably connected is also achieved.

In summary, the hybrid insulated switchgear of the present invention compactly arranges the breaker mechanism and the isolation mechanism, uses the breaker structure as the main support, and uses the conductive copper bar as the main support of the structure, which is a key design for realizing the miniaturization of the product, and can effectively reduce the layout of the product, and miniaturize the switch. The contact rotating position of the isolation knife adopts a spring contact finger structure, so that the current carrying grade of the contact position at the position can be effectively improved, and the current capacity of a product is effectively improved. The direct contact of isolation sword and contact is watchband and touches and indicates the structure, has guaranteed the current-carrying capacity of face contact position, is the key that realizes the heavy current of switch form consequently, has broken through the problem that the switch current-carrying is little. The isolation part is designed in a modularized mode and assembled on the circuit breaker in an integral mode, so that the product structure is more compact, safe and reliable. The cabinet body is designed by adopting modular partition, each compartment is relatively independent, and the instrument chamber is arranged at the upper part of the mechanism chamber and is flush with the air box, so that the structure of the product is more compact. The position of cabinet combining is provided with interior conical sleeve pipe can effectively with the product phase-match on the market, can accomplish with other seamless concatenations of product, improves the suitability of product. The standard C-shaped sleeve used by the wire inlet and outlet sleeve enables the product to be effectively matched with the standard cable accessories in the market, and the application range of the product is widened.

The hybrid insulated switchgear disclosed by the invention integrates the circuit breaker and the isolation part to realize a common gas box structure of the circuit breaker and the isolation mechanism, the circuit breaker and the isolation mechanism are integrated and assembled in one gas box to realize product integration and miniaturization, and in the design of the hybrid insulated switchgear, the movable positions of the hybrid insulated switchgear adopt the form of contact fingers, so that the possibility of large capacity of a switch is realized, and the on-off of a large-capacity switch of the switchgear are realized by combining the circuit breaker.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A hybrid insulated switchgear characterized in that: the circuit breaker is connected with a cable in the cable bin through a wire outlet copper bar and a wire, a wire outlet static contact is arranged on the circuit breaker and is rotationally connected with an isolation knife, the isolation knife is provided with power for rotating, the isolation knife is provided with three stations, namely a grounding station, an isolation station and a closing station, when rotating, the isolation knife is in contact with the closing contact, the closing contact is arranged on an upper bus copper bar, and the upper bus copper bar is connected with a main bus copper bar.

2. The hybrid insulated switchgear of claim 1, characterized in that: the power output shaft of the isolation mechanism is connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is connected with a main transmission shaft, the main transmission shaft drives an output crank arm to reciprocate, the output crank arm drives an insulating pull rod to move, and the insulating pull rod is connected with an isolation knife.

3. The hybrid insulated switchgear of claim 1, characterized in that: when the isolation knife is positioned at the grounding station, the isolation knife is contacted with the grounding contact, and the grounding contact is arranged on the current-carrying row.

4. The hybrid insulated switchgear of claim 3, characterized in that: and watchband contact fingers are arranged at the joints of the isolation knife and the grounding contact and the closing contact.

5. The hybrid insulated switchgear of claim 1, characterized in that: the main bus copper bar is connected with a combined cabinet inner cone.

6. The hybrid insulated switchgear of claim 1, characterized in that: and a spring contact finger is arranged at the joint of the outlet static contact and the isolation knife.

7. The hybrid insulated switchgear of claim 1, characterized in that: and the lower part of the mechanism chamber is provided with a wire outlet sleeve which is communicated with the mechanism chamber and the cable bin.

8. The hybrid insulated switchgear of claim 7, characterized in that: one end of the outgoing line sleeve is connected with an outgoing line copper bar, and the other end of the outgoing line copper bar is connected with a circuit breaker.

9. The hybrid insulated switchgear of claim 7 or 8, characterized in that: the outgoing line sleeve is a C-shaped sleeve.

10. The hybrid insulated switchgear of claim 1, characterized in that: and an intelligent equipment controller and an instrument are arranged in the switch instrument room.