CN217589964U

CN217589964U - Normal-pressure sealed air insulation switch equipment

Info

Publication number: CN217589964U
Application number: CN202221266034.1U
Authority: CN
Inventors: 吴厚烽; 吴汉榕; 吴厚登; 林蔚; 杜艺; 黄顺得; 林勤旭
Original assignee: Guangdong Zhengchao Electrical Group Co ltd
Current assignee: Guangdong Zhengchao Electrical Group Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-10-14
Anticipated expiration: 2032-05-25

Abstract

The utility model relates to a power equipment technical field especially relates to a sealed air insulation switchgear of ordinary pressure. The utility model discloses a cubical switchboard body and 3 group's switching mechanism, 3 group's switching mechanism's isolation contact combined mechanism all links to each other with the one end of drawing forth the axle, the other end of drawing forth the axle is provided with operating mechanism. The utility model seals the main parts of the equipment in the switch cabinet body, and the switch cabinet body is reliably grounded, so that the operator can not touch the high-voltage electrified part; meanwhile, the influence of external conditions such as dust, dirt, humid air and the like in the environment on the performance of the equipment is avoided, and the stability and effectiveness of the product insulator system in the life cycle are ensured; meanwhile, the reliable mechanical interlocking ensures the reliability of field operation.

Description

Normal-pressure sealed air insulation switch equipment

Technical Field

The utility model belongs to the technical field of power equipment, concretely relates to ordinary pressure sealed air insulation switchgear.

Background

In the current power equipment, the power distribution equipment mainly takes an insulating gas cabinet as a main part, and mainly comprises the insulating gas cabinet which needs to be filled with insulating gas such as SF6 insulating gas and the like. The SF6 insulating gas is not environment-friendly as greenhouse gas, and when the switchgear breaks down, the SF6 insulating gas decomposes into toxic gas at high temperature; the air leakage is easy to occur when the air-permeable brick is applied to high-altitude areas; they are easily liquefied at low temperatures and lose their insulating properties. Under the national 'double carbon' environmental protection policy target, the usage amount of the SF6 insulating gas is increasingly limited.

Meanwhile, related functional components of the traditional switch equipment are distributed inside and outside the cabinet as required, and the service life of the switch equipment is greatly influenced when severe environments such as high altitude, severe cold, humidity, dirt and the like are met. Simultaneously, in order to guarantee safety, all be provided with insulation board isotructure, cause the general volume of equipment and weight to be bigger than normal, influence user experience.

Disclosure of Invention

The utility model discloses to above-mentioned problem, compensate prior art not enough, provide a sealed air insulated switchgear of ordinary pressure to solve the problem that appears in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a sealed air insulation switchgear of ordinary pressure, includes the cubical switchboard body and 3 group's on-off mechanism, on-off mechanism is including being qualified for the next round of competitions cable, its characterized in that: the outgoing cable is led in from the outer surface of the switch cabinet body and is connected with a busbar, a third insulator fixed on the switch cabinet body is arranged at one end of the busbar, the other end of the busbar is connected with one end of a branch busbar, the other end of the branch busbar is connected with an isolation contact combining mechanism, the isolation contact combining mechanism is connected with an incoming cable, and the incoming cable is led out from the switch cabinet body; the isolation contact combination mechanisms of the 3 groups of switch mechanisms are all connected with one end of a leading-out shaft, the other end of the leading-out shaft is provided with an operating mechanism, and the operating mechanism is arranged on the outer surface of the switch cabinet body; and 3 incoming cables corresponding to the 3 groups of switch mechanisms are matched in three phases.

In a preferred embodiment, the isolation contact combining mechanism includes an isolation stationary contact, and the isolation stationary contact is fixed on an isolation grounding bracket through a second insulator; the isolation grounding bracket is fixed on the switch cabinet body; one end of the isolation static contact is connected with one end of a special-shaped branch bus, and the other end of the special-shaped branch bus is connected with an incoming cable; the other end of the isolation static contact is hinged with one end of the swinging mechanism, and the other end of the swinging mechanism is provided with an isolation contact and a grounding contact at the head and tail positions of the swinging mechanism rotating around the hinged shaft respectively; the isolation contact is fixed on the isolation grounding support through the first insulator, and the grounding contact is fixed on the grounding busbar.

In a preferred embodiment, one end of the ground busbar is fixed on the isolated ground bracket, and the other end of the ground busbar is grounded through the ground busbar.

Furthermore, the swing mechanism comprises an isolation knife, one end of the isolation knife is hinged to the isolation static contact, the middle position of the isolation knife is connected with a connecting rod assembly, and the connecting rod assembly is fixed on the leading-out shaft.

In a preferred embodiment, the outgoing cable is led into the switchgear body through an outgoing bushing, and the incoming cable is led out of the switchgear body through an incoming bushing.

Further, the creepage distance of the inlet wire sleeve is 240mm, and the electrical distance is 125mm.

Furthermore, the incoming line sleeve pipe adopts standard C type sleeve pipe, the part of incoming line sleeve pipe outside the cubical switchboard body is provided with the electric installation is got to the electric capacity.

Furthermore, an online monitoring device and an energy taking device are arranged inside the first insulator and the second insulator.

In a preferred embodiment, one end of the busbar is provided with a first current transformer, and the bottom of the switch cabinet body is provided with a voltage transformer and a second current transformer.

The beneficial effects of the utility model reside in that: 1. the main parts of the equipment are sealed in a switch cabinet body, and the switch cabinet body is reliably grounded to ensure that an operator cannot touch a high-voltage electrified part; meanwhile, the influence of external conditions such as dust, dirt, humid air and the like in the environment on the performance of the equipment is avoided, and the stability and effectiveness of the product insulator system in the life cycle are ensured; reliable mechanical interlocking ensures the reliability of the field operation sequence.

2. The equipment adopts an isolation and grounding integrated design, does not need to be additionally provided with structures such as an insulating plate and the like, realizes small volume and light weight, and meets the requirements of insulation and mechanical properties.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the power-on state of the present invention.

Fig. 2 is a schematic diagram of the overall structure of the grounding state of the present invention.

Fig. 3 is a schematic cross-sectional structure of the present invention.

Fig. 4 is a schematic diagram of the structure of the operating mechanism of the present invention.

The reference signs are: 1. a switch cabinet body; 2. an outgoing cable; 3. a busbar; 4. a branch busbar; 5. a first insulator; 6. isolating the contacts; 7. an isolation knife; 8. a connecting rod assembly; 9. an isolated grounding support; 10. an operating mechanism; 11. a lead-out shaft; 12. a third insulator; 13. a second insulator; 14. isolating the static contact; 15. a special-shaped branch bus; 16. a wire inlet cable; 17. a ground contact; 18. a ground bus; 19. a ground bar; 20. a wire outlet sleeve; 21. a wire inlet sleeve; 22. a first current transformer; 23. a voltage transformer; 24. a second current transformer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1-4 of the specification, the atmospheric-pressure sealed air-insulated switchgear of the embodiment comprises a

switchgear body

1 and 3 groups of switch mechanisms, wherein each switch mechanism comprises an outgoing cable 2, and the atmospheric-pressure sealed air-insulated switchgear is characterized in that: the outgoing cable 2 is led in from the outer surface of the switch cabinet body 1, the outgoing cable 2 is connected with a busbar 3, one end of the busbar 3 is provided with a third insulator 12 fixed on the switch cabinet body 1, the other end of the busbar 3 is connected with one end of a branch busbar 4, the other end of the branch busbar 4 is connected with an isolation contact combination mechanism, the isolation contact combination mechanism is connected with an incoming cable 16, and the incoming cable 16 is led out from the switch cabinet body 1; the isolation contact combination mechanisms of the 3 groups of switch mechanisms are all connected with one end of a leading-out shaft 11, the other end of the leading-out shaft 11 is provided with an operating mechanism 10, and the operating mechanism 10 is arranged on the outer surface of the switch cabinet body 1; and 3 groups of switch mechanisms correspond to 3 incoming cables 16 in three-phase matching. The isolation contact combination mechanism comprises an isolation static contact 14, and the isolation static contact 14 is fixed on the isolation grounding support 9 through a second insulator 13; the isolation grounding bracket 9 is fixed on the switch cabinet body 1; one end of the isolation static contact 14 is connected with one end of a special-shaped branch bus 15, and the other end of the special-shaped branch bus 15 is connected with an incoming cable 16; the other end of the isolation static contact 14 is hinged with one end of the swinging mechanism, and the other end of the swinging mechanism is provided with an isolation contact 6 and a grounding contact 17 at the head and tail positions of the swinging mechanism rotating around the hinged shaft; the isolating contact 6 is fixed on an isolating grounding bracket 9 through a first insulator 5, and the grounding contact 17 is fixed on a grounding busbar 18. One end of the grounding busbar 18 is fixed on the isolation grounding bracket 9, and the other end of the grounding busbar 18 is grounded through a grounding bar 19. The grounding contact 17 is grounded through the grounding bus bar 18 and the grounding bar 19, when the switch equipment is electrified in a leakage or induction mode, current can be quickly led into the ground through the grounding wire, so that the equipment shell is not electrified any more, and the safety of personnel and equipment is guaranteed. The swing mechanism comprises an isolation knife 7, one end of the isolation knife 7 is hinged to an isolation static contact 14, the middle position of the isolation knife 7 is connected with a connecting rod assembly 8, and the connecting rod assembly 8 is fixed on an outgoing shaft 11. Meanwhile, by optimizing the shape of the isolating knife 7 and the grounding contact 17, the electric field is uniformly distributed, the pre-breakdown distance of the electric field is reduced when the switch is closed, and the electrical performance of the switch device is improved. The outgoing cable 2 is led into the switch cabinet body 1 through an outgoing sleeve 20, and the incoming cable 16 is led out of the switch cabinet body 1 through an incoming sleeve 21. The cable is convenient to install while the product cost is reduced by adopting the form of a sleeve to lead in and lead out. The creepage distance of the wire inlet bushing 21 is 240mm, which means the shortest distance along the insulating surface between the two parts which normally bear the operating voltage; the electrical distance is 125mm, which means the insulation distance that the air can reach on the premise of ensuring the stability and safety of the electrical performance. The wire inlet sleeve 21 is a standard C-shaped sleeve which has the characteristics of good flexibility, high temperature resistance, difficulty in fracture and aging and the like; the part of the incoming line sleeve 21 outside the switch cabinet body 1 is provided with a capacitor electricity taking device, and the capacitor electricity taking device has smaller attenuation effect on alternating current signals relative to a resistor and a capacitor, so that original voltage signals can be better displayed. And an online monitoring device and an energy taking device are arranged inside the first insulator 5 and the second insulator 13. The on-line monitoring device is used for on-line monitoring of temperature rise and release quantity of the integrated isolation grounding switch equipment, and the energy taking device can be used for monitoring the fracture state of the integrated isolation grounding switch equipment and providing energy for the secondary control equipment. One end of the busbar 3 is provided with a first current transformer 22 which converts high voltage or large current into standard small current in proportion so as to realize standardization and miniaturization of a measuring instrument, a protective device and an automatic control device. Meanwhile, the high-voltage primary circuit and the low-voltage control circuit can be separated, so that high voltage and high current of the primary circuit are prevented from directly entering secondary control equipment, and personal safety and equipment safety are guaranteed. The bottom of the switch cabinet body 1 is provided with a voltage transformer 23 and a second current transformer 24 for measuring current values and voltage values, and the switch cabinet body has the functions of protection, measurement, monitoring and the like.

The implementation scenario is specifically as follows: when the switch device is not in operation, the isolation knife 7 connects the isolation static contact 14 with the grounding contact 17 in a grounding state. When a device communication circuit needs to be started, the operating mechanism 10 is started firstly, and the operating mechanism 10 drives the leading-out shaft 11 to rotate anticlockwise; the leading-out shaft 11 drives the connecting rod assembly 8 to rotate anticlockwise, the connecting rod assembly 8 drives the isolating knife 7 to rotate anticlockwise, the isolating static contact 14 is communicated with the isolating contact 6, and the isolating switch is switched on, namely equipment is communicated. On the contrary, when the device disconnection circuit needs to be closed, the leading-out shaft 11 rotates clockwise, so that the isolation static contact 14 is communicated with the grounding contact 17, and the isolation switch is switched off, namely, the device is disconnected.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

And finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sealed air insulation switchgear of ordinary pressure, includes the cubical switchboard body (1) and 3 switchgear of group, switchgear is including cable (2), its characterized in that of being qualified for the next round of competitions: the outgoing cable (2) is led in from the outer surface of the switch cabinet body (1), the outgoing cable (2) is connected with a busbar (3), a third insulator (12) fixed on the switch cabinet body (1) is arranged at one end of the busbar (3), the other end of the busbar (3) is connected with one end of a branch busbar (4), the other end of the branch busbar (4) is connected with an isolation contact combination mechanism, the isolation contact combination mechanism is connected with an incoming cable (16), and the incoming cable (16) is led out from the switch cabinet body (1); the isolation contact combination mechanisms of the 3 groups of switch mechanisms are all connected with one end of a leading-out shaft (11), the other end of the leading-out shaft (11) is provided with an operating mechanism (10), and the operating mechanism (10) is arranged on the outer surface of the switch cabinet body (1); and 3 incoming cables (16) corresponding to the 3 groups of switch mechanisms are matched in three phases.

2. An atmospheric pressure sealed air insulated switchgear according to claim 1, characterized in that: the isolation contact combination mechanism comprises an isolation static contact (14), and the isolation static contact (14) is fixed on the isolation grounding bracket (9) through a second insulator (13); the isolation grounding bracket (9) is fixed on the switch cabinet body (1); one end of the isolation static contact (14) is connected with one end of a special-shaped branch bus (15), and the other end of the special-shaped branch bus (15) is connected with an incoming cable (16); the other end of the isolation static contact (14) is hinged with one end of the swinging mechanism, and the other end of the swinging mechanism is provided with an isolation contact (6) and a grounding contact (17) at the head and tail positions of the swinging mechanism rotating around the hinged shaft; the isolation contact (6) is fixed on an isolation grounding support (9) through a first insulator (5), and the grounding contact (17) is fixed on a grounding busbar (18).

3. An atmospheric pressure sealed air insulated switchgear according to claim 2, characterized in that: one end of the grounding busbar (18) is fixed on the isolation grounding bracket (9), and the other end of the grounding busbar (18) is grounded through a grounding bar (19).

4. An atmospheric pressure sealed air insulated switchgear according to claim 2, characterized in that: the swing mechanism comprises an isolation knife (7), one end of the isolation knife (7) is hinged to an isolation static contact (14), the middle position of the isolation knife (7) is connected with a connecting rod assembly (8), and the connecting rod assembly (8) is fixed on an outgoing shaft (11).

5. An atmospheric pressure sealed air insulated switchgear according to claim 1, characterized in that: the outgoing cable (2) is led into the switch cabinet body (1) through the outgoing sleeve (20), and the incoming cable (16) is led out of the switch cabinet body (1) through the incoming sleeve (21).

6. An atmospheric pressure sealed air insulated switchgear according to claim 5, characterized in that: the creepage distance of the wire inlet sleeve (21) is 240mm, and the electric distance is 125mm.

7. An atmospheric pressure sealed air insulated switchgear according to claim 5, characterized in that: the incoming line sleeve pipe (21) adopts standard C type sleeve pipe, the part of incoming line sleeve pipe (21) in the cubical switchboard body (1) outside is provided with the electric installation is got to the electric capacity.

8. The atmospheric-pressure sealed air-insulated switchgear according to claim 2, characterized in that: and an online monitoring device and an energy taking device are arranged inside the first insulator (5) and the second insulator (13).

9. An atmospheric pressure sealed air insulated switchgear according to claim 1, characterized in that: one end of the busbar (3) is provided with a first current transformer (22), and the bottom of the switch cabinet body (1) is provided with a voltage transformer (23) and a second current transformer (24).