CN219513006U

CN219513006U - Power switch

Info

Publication number: CN219513006U
Application number: CN202320811818.6U
Authority: CN
Inventors: 黄余良; 林茂源; 刘强志
Original assignee: Zhejiang Qite Electric Co ltd
Current assignee: Zhejiang Qite Electric Co ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-08-11
Anticipated expiration: 2033-04-13

Abstract

The utility model discloses a power switch, which comprises a circuit breaker and a disconnecting switch arranged below the circuit breaker; the circuit breaker comprises a circuit breaker side plate, a circuit breaker main shaft arranged on the side plate and a vacuum fire extinguishing chamber arranged in the circuit breaker side plate; the upper end of the vacuum arc-extinguishing chamber is provided with a fixed plate, and both sides of the vacuum arc-extinguishing chamber are provided with insulating partition plates, and screws on the vacuum arc-extinguishing chamber are isolated through screw protection covers; the front surface of the circuit breaker is connected with a soft connection protective cover; the front side of the isolating switch is also provided with an insulating cover; insulating parts such as an insulating cover, a soft connection protective cover, a screw protective cover and the like are adopted to effectively solve the problem that interphase short circuit is avoided due to the creepage distance between the insulating parts and the cabinet body. The circuit breaker curb plate has also increased the effectual increase creepage distance of shirt rim. The insulating rotating shaft is made of insulating flame-retardant materials, and has the advantages of good strength, long creepage distance and the like. Based on the above, the utility model enhances the insulating capability of the device by adding protective equipment to the electrode accessory.

Description

Power switch

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to a power switch.

Background

Existing switches are typically insulated in ring main units using SF6 gas, or using nitrogen or dry air. Typically, the check valve in the charging valve will fail only when SF6 gas is replenished into the SF6 circuit breaker. Although SF6 gas discharged during maintenance has weak harm to personnel, under the action of electric arc and corona, the SF6 gas can be decomposed into highly toxic low-fluorine compounds under the participation of water. In addition, SF6 gas is a greenhouse effect gas, and the greenhouse effect of single molecules thereof is 2.2 ten thousand times that of carbon dioxide. For this reason, it is necessary to reduce the use of SF6 gas.

Disclosure of Invention

The present utility model is directed to a power switch, which solves the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a power switch comprises a circuit breaker and a disconnecting switch arranged below the circuit breaker; the circuit breaker comprises a circuit breaker side plate, a circuit breaker mounting plate arranged on the side surface of the circuit breaker side plate, a circuit breaker main shaft arranged on the circuit breaker side plate and a vacuum fire extinguishing chamber arranged in the circuit breaker side plate; the upper end of the vacuum arc-extinguishing chamber is provided with a fixed plate, and two sides of the vacuum arc-extinguishing chamber are provided with three-phase insulating partition boards, and screws on the vacuum arc-extinguishing chamber are isolated through screw protection covers; the front of the circuit breaker is connected with a soft connection protective cover, and the front of the isolating switch is also provided with an insulating cover.

As a preferable technical scheme of the utility model: the circuit breaker curb plate is kept away from the one side of circuit breaker mounting panel still is equipped with back insulating barrier.

As a preferable technical scheme of the utility model: the soft connection protective cover is movably connected with the circuit breaker.

As a preferable technical scheme of the utility model: the isolating switch comprises an isolating front plate and an isolating rear plate, wherein the isolating front plate is connected with the isolating rear plate through a grounding cross beam and an isolating cross beam, a grounding contact and a contact knife are further arranged between the grounding cross beam and the isolating cross beam, and isolating insulating plates are arranged on two sides of the contact knife.

As a preferable technical scheme of the utility model: the cross section of the insulating cover is arc-shaped, and the insulating cover is movably arranged on the isolating switch.

As a preferable technical scheme of the utility model: the two ends of the insulating cover are connected with the plugboards, and a guide plate is arranged between the two plugboards.

As a preferable technical scheme of the utility model: and a chute is further formed in the side plate of the circuit breaker, and the three-phase insulating partition plate is inserted onto the main shaft of the circuit breaker along the chute.

By adopting the technical scheme, the utility model has the beneficial effects that: insulating parts such as an insulating cover, a soft connection protective cover, a screw protective cover and the like are adopted to effectively solve the problem that interphase short circuit is avoided due to the creepage distance between the insulating parts and the cabinet body. The circuit breaker curb plate has also increased the effectual increase creepage distance of shirt rim. The insulating rotating shaft is made of insulating flame-retardant materials, and has the advantages of good strength, long creepage distance and the like. Based on this, the design of the reinforced insulator on the basis of the prior art does not use any gas to serve as an insulating medium, and the electric power transmission can be reliably performed under the normal air pressure state.

Drawings

FIG. 1 is a schematic diagram of the main structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of a body structure of the present utility model;

fig. 3 is a schematic view of an explosion structure of the circuit breaker of the present utility model;

fig. 4 is a schematic diagram of an explosion structure of the isolating switch of the present utility model.

In the figure: 1. a breaker mounting plate; 2. a breaker spindle; 3. a spindle insulating sleeve; 4. a three-phase bracket; 5. a breaker side plate; 6. a pressure spring; 7. a pull rod; 8. a screw protecting cover; 9. a soft connection protective cover; 10. a fixing plate; 11. a stationary contact; 12. a rear insulating spacer; 13. a three-phase insulating separator; 14. a vacuum arc extinguishing chamber; 15. soft connection; 16. a vacuum arc extinguishing chamber guide plate; 17. adjusting a screw; 18. isolating the front plate; 19. an isolation back plate; 20. isolating the rotating shaft; 21. an insulating cover; 22. an isolation beam; 23. an isolation insulating partition; 24. a moving contact; 25. a contact knife; 26. a ground contact; 27. a grounding beam; 28. a shielding seat; 29. a three-phase crank arm; 30. an isolating switch; 31. a circuit breaker; 32. inserting plate; 33. and a guide plate.

Description of the embodiments

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "upper surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-4, an embodiment of the present utility model is provided: a power switch comprising a circuit breaker 31 and a disconnector 30 mounted under the circuit breaker 31; the circuit breaker 31 comprises a circuit breaker side plate 5, a circuit breaker mounting plate 1 arranged on the side surface of the circuit breaker side plate 5, a circuit breaker main shaft 2 arranged on the circuit breaker side plate 5, and a vacuum fire extinguishing chamber 14 arranged in the circuit breaker side plate 5; the upper end of the vacuum arc-extinguishing chamber 14 is provided with a fixed plate 10, two sides of the vacuum arc-extinguishing chamber 14 are provided with three-phase insulating partition plates 13, and screws on the vacuum arc-extinguishing chamber 14 are isolated through screw protection covers 8; the front surface of the circuit breaker 31 is connected with a soft connection protection cover 9, and the front surface of the isolating switch 30 is also provided with an insulating cover 21.

In summary, reliable insulation partition exists between the three phases, and the insulation components such as the insulation cover 21, the soft connection protection cover 9, the screw protection cover 8 and the like are adopted to effectively solve the problem that the creepage distance between the screw protection cover and the cabinet body is short-circuited between phases. The breaker side panels 5 also increase the effective increase creepage distance of the skirt. The insulating rotating shaft 20 is made of insulating flame-retardant materials, and has the advantages of good strength, long creepage distance and the like.

In addition, the side plate 5 of the circuit breaker is further provided with a chute, and the three-phase insulating partition plate 13 is inserted onto the main shaft 2 of the circuit breaker along the chute, so that the three-phase insulating partition plate 13 is fixed and simultaneously the installation and the replacement of the three-phase insulating partition plate 13 are facilitated.

Further, since the side of the breaker side plate 5 away from the breaker mounting plate 1 is further provided with the rear insulating spacer 12, the insulating capability of the apparatus can be further enhanced.

The flexible connection protective cover 9 is movably connected with the circuit breaker 31, so that the flexible connection protective cover 9 is convenient to install and disassemble.

On the basis of the scheme, the isolating switch 30 comprises an isolating front plate 18 and an isolating rear plate 19, the isolating front plate 18 and the isolating rear plate 19 are connected through a grounding beam 27 and an isolating beam 22, a grounding contact 26 and a contact blade 25 are arranged between the grounding beam 27 and the isolating beam 22, and isolating insulating plates 23 are arranged on two sides of the contact blade 25.

Further, the cross section of the insulating cover 21 is arc-shaped, and the insulating cover 21 is movably mounted on the isolating switch 30.

Further, two ends of the insulating cover 21 are connected to the insertion plates 31, and a guide plate 33 is further disposed between the two insertion plates 32.

In summary, the circuit breaker and the isolating switch are combined, and the novel power switch is simple and convenient to install, small in size and compact. The industrial frequency withstand voltage, the break, the fracture and the interphase withstand voltage required in the national standard are reliable and stable, and the partial discharge and the temperature rise meet the requirements.

In addition, the circuit breaker is built by the foundation that two curb plates 5 are three-phase fixed and support, and three-phase support 4 provides support and direction for every looks switch closes and divides to cooperate with three-phase turning arm 29 and drive the rotation of main shaft through circuit breaker operating device and make the rotation of three-phase turning arm 29, the upper and lower compression control vacuum interrupter 14 of linkage pull rod 7 operation pressure spring 6 carries out power connection and opens and shuts the work. And the static contact 11 is designed according to the actual structure, so that the breaker switch is connected with the contact blade 25 of the isolating switch for power input and output.

Further, the isolating switch 30 is fixed and mounted by the isolating front plate 18 and the isolating rear plate 19, the isolating beam 22 provides fixing and supporting for the power input and output conductive member, and the ground beam 27 provides mounting and supporting for the ground contact. The isolating operation mechanism drives the isolating rotating shaft 20 to rotate so as to drive the contact knife to perform the operations of isolating and grounding.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims

1. An electrical switch, characterized by: comprises a circuit breaker (31) and a disconnecting switch (30) arranged below the circuit breaker (31);

the circuit breaker (31) comprises a circuit breaker side plate (5), a circuit breaker mounting plate (1) arranged on the side surface of the circuit breaker side plate (5), a circuit breaker main shaft (2) arranged on the circuit breaker side plate (5) and a vacuum arc extinguishing chamber (14) arranged in the circuit breaker side plate (5);

the upper end of the vacuum arc-extinguishing chamber (14) is provided with a fixed plate (10), two sides of the vacuum arc-extinguishing chamber (14) are provided with three-phase insulating partition plates (13), and screws on the vacuum arc-extinguishing chamber (14) are isolated through screw protection covers (8) arranged on the vacuum arc-extinguishing chamber;

the front of the circuit breaker (31) is connected with a soft connection protective cover (9) which is arranged, and the front of the isolating switch (30) is also provided with an insulating cover (21).

2. A power switch as claimed in claim 1, wherein: and one surface of the breaker side plate (5) far away from the breaker mounting plate (1) is also provided with a rear insulating partition plate (12).

3. A power switch as claimed in claim 2, wherein: the soft connection protective cover (9) is movably connected with the circuit breaker (31).

4. A power switch according to claim 1 or 2 or 3, characterized in that: the isolating switch (30) comprises an isolating front plate (18) and an isolating rear plate (19), the isolating front plate (18) is connected with the isolating rear plate (19) through a grounding cross beam (27) and an isolating cross beam (22) which are arranged, a grounding contact (26) and a contact knife (25) are arranged between the grounding cross beam (27) and the isolating cross beam (22), and isolating insulating plates (23) are arranged on two sides of the contact knife (25).

5. A power switch as claimed in claim 4, wherein: the cross section of the insulating cover (21) is arc-shaped, and the insulating cover (21) is movably arranged on the isolating switch (30).

6. A power switch as claimed in claim 5, wherein: two ends of the insulating cover (21) are connected with plugboards (32) which are arranged, and a guide plate (33) is arranged between the two plugboards (32).

7. A power switch as claimed in claim 6, wherein: the side plate (5) of the circuit breaker is also provided with a chute, and the three-phase insulating partition plate (13) is inserted onto the main shaft (2) of the circuit breaker along the chute.