CN202816779U

CN202816779U - Solid insulated pole

Info

Publication number: CN202816779U
Application number: CN 201220454399
Authority: CN
Inventors: 刘桂华; 李水胜; 董淑春; 侯峰; 周振业
Original assignee: Beihai Galaxy Switch Devices Co Ltd
Current assignee: Beihai Galaxy Switch Devices Co Ltd
Priority date: 2012-09-07
Filing date: 2012-09-07
Publication date: 2013-03-20
Anticipated expiration: 2022-09-07

Abstract

The utility model discloses a solid insulated pole, comprising a housing consisting of an insulating layer and a ground layer which is coated outside the insulating layer, a load switch chamber, an isolating switch chamber, a vacuum arc-extinguishing chamber, a wire inlet side bushing inner copper part, a wire inlet side bushing, an isolating switch static contact, an isolating switch moving blade, a wire outlet side bushing, etc.; wherein, a moving end faying surface of the vacuum arc-extinguishing chamber is connected with a shielding case, the shielding case is in conducting connection with a moving end of the vacuum arc-extinguishing chamber through a conducting part, the shielding case and a wire outlet side bushing inner copper part electrically connected with a shielding ring are arranged inside the insulating layer, a connecting hole end face of the isolating switch static contact is provided with a flange and is contacted with a connecting hole end face of a static contact insert arranged on the housing through the flange, the flange is fixed on the static contact insert through bolts, and an outer side of the wire inlet side bushing is provided with a waterproof recessed skirt edge. Compared with the prior art, the solid insulated pole of the utility model has the advantages of compact structure, uniform electric field distribution inside the pole, small partial discharge value, capacity for obviously reducing discharge phenomena from a charged body inside the pole to the insulating layer, and capacity for effectively raising an insulating capability of the pole.

Description

The solid insulation pole

Technical field

The utility model relates to power transmission and distribution switchgear manufacturing technology field, especially a kind of fixed sealing type, and surface of insulating layer is coated with ground plane, is used for the solid insulation pole of solid insulation ring main unit.

Background technology

Solid insulation ring main unit is present ring main unit Hot spots for development, be directly connected to the safety and reliability of transmission system as the quality of the key equipment ring main unit quality of urban network restructuring and user's controller switching equipment control, because SF6 gas has superior arc quenching effect, use very general with the gas isolated ring main unit of SF6 at present, but because SF6 gas is a kind of gas of not environmental protection, its destructive utmost point to atmospheric ozone layer is worked as in 23900 times of CO2, as deal with improperly and understand the greenhouse effect that aggravate the earth, along with people constantly strengthen environmental consciousness, the unfavorable factor of SF6 gas-insulated ring network cabinet has also caused people's concern.

Existing many enterprises release the solid insulation ring main unit product in the market, shown in the utility model content that China Patent No. is CN102222868A, its surface of insulating layer also is coated with and partly connects the stratum, movable end of vacuum arc extinguishing chamber is connected with insulated tension pole, rely on air insulation, because surface of insulating layer is coated with the semiconductive ground plane, the earth potential of product is whole surface of insulating layer, again because movable end of vacuum arc extinguishing chamber connects and there are a lot of wedge angles in tri-station isolating switch itself, add will be flexible coupling or other electric conductor is connected, the pole internal electric field distributes very inhomogeneous, local flashover discharge very easily occurs, when serious even ebb-flow discharge can occur, destroy machinery and the dielectric strength of insulating barrier, cause that the insulating capacity of product descends.

The utility model content

Problem to be solved in the utility model provides a kind of solid insulation switch that can solve surface of insulating layer coating ground plane and inner the sudden strain of a muscle occurs easily irons, and adaptive capacity to environment is poor, the solid insulation pole of the serious and complex structure and other problems of partial discharge.

In order to address the above problem, the technical scheme of the utility model solid insulation pole is: this solid insulation pole, include a housing that is consisted of by insulating barrier and the ground plane that scribbles thereof outward, and be provided with on-load switch chamber and isolating switch chamber in the described housing; Vacuum interrupter is equipped with in described on-load switch chamber, copper spare and inlet wire side sleeve pipe in the inlet wire side sleeve pipe; Static contact isolation switch is equipped with in described isolating switch chamber, isolating switch moving knife, the interior copper spare of outgoing line side sleeve pipe and outgoing line side sleeve pipe etc.Faying surface is connected with radome in the moved end of described vacuum interrupter, and described radome is connected with described movable end of vacuum arc extinguishing chamber conducting by electric-conductor; Described radome and be electrically connected with in the described outgoing line side sleeve pipe of shading ring copper spare to be located at described insulating barrier inner; The connecting hole end face of described static contact isolation switch is provided with flange, described flange and the connecting hole end contact that is located at the fixed contact inserts on the described housing.In addition, described inlet wire side outside of sleeve is provided with a circle indent shirt rim, cooperates with cable shoes to prevent effectively when installing that water droplet is immersed in described cable shoes inside.

Because adopt technique scheme, the utility model and prior art ultimate ratio have following beneficial effect:

1. the electric field strength of the movable end of vacuum arc extinguishing chamber of the utility model solid insulation pole and tri-station isolating switch moved end has had preferably improvement, improved insulating capacity, reduced design difficulty, the insulation against ground distance of product and insulation creep distance are from can greatly dwindling, and the solid insulation switchgear that is suitable for miniaturization uses.

2. increased by one shading ring on the copper spare in the outgoing line side sleeve pipe of the utility model solid insulation pole, can change the distribution of electric field, thereby the transitional region of copper spare in the outlet casing tube with the insulating barrier handing-over shielded, can the Effective Raise Product Safety.

Description of drawings

Fig. 1 is the pressed article cross-sectional schematic of the utility model solid insulation pole.

Fig. 2 is the pressed article schematic top plan view of the utility model solid insulation pole.

Fig. 3 is the partial enlarged drawing at I place among Fig. 1.

Fig. 4 is the integral body assembling cross-sectional schematic of the utility model solid insulation pole.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1, shown in Figure 2 be the utility model solid insulation pole, include a housing that scribbles ground plane 1 that is coated by insulating barrier 2 shells, be provided with on-load switch chamber and isolating switch chamber in the housing, the on-load switch chamber includes vacuum interrupter 5, copper spare 7 in the inlet wire side sleeve pipe, inlet wire side sleeve pipe 9; The isolating switch chamber includes static contact isolation switch 20, fixed contact inserts 15, isolating switch moving knife 22, outgoing line side sleeve pipe 10, the interior copper spare 13 of outgoing line side sleeve pipe etc.Its concrete installation is produced as follows: connect radome 3 at the moved end of vacuum interrupter 5 faying surface, radome 3 is connected with vacuum interrupter 5 moved end conductings by electric-conductor 4, be assembled in the mould together with copper spare 13 in the outgoing line side sleeve pipe that is electrically connected with shading ring 12, and pressure injection is in insulating barrier 2 inside, at the insulating barrier 2 outer surfaces coating ground plane 1 of curing molding.The connecting hole end face of static contact isolation switch 20 is provided with flange, this flange be located at the connecting hole end contact of the fixed contact inserts 15 on the housing, and be bolted on fixed contact inserts 15, all edge tip are all fallen into fillet.Inserts 14, fixed contact be inserts 15 fixedly, and grounding contact fixedly inserts 16 installs to respectively in the mould, and pressure injection is in insulating barrier 2 inside again.Wherein radome 3 can be made with conduction or semiconductive material, being connected used electric-conductor 4 between radome 3 and the vacuum interrupter 5 can be that the conductive seal circle also can be metallic conduction spare, can also be with bolt and by mode conductings such as radome and movable end of vacuum arc extinguishing chamber interference fit frictional connections, shading ring 12 also available conduction or semiconductive material is made, can adopt welding between the copper spare 13 in shading ring 12 and the outgoing line side sleeve pipe, also may adopt the mode of bolted to realize between the two electrical connection.

The vacuum interrupter 5 of shown in Figure 3 is the utility model solid insulation pole is quiet distolateral, is provided with an inlet wire side sleeve pipe 9, and its outside is provided with a circle indent shirt rim, can prevent effectively that water droplet is immersed in cable shoes inside when cooperating installation with cable shoes.

The utility model solid insulation pole shown in Figure 4, its whole assembling process is as follows:

The utility model solid insulation pole, by the mould injection-compression molding, vacuum interrupter 5 moved ends are connected with movable end of vacuum arc extinguishing chamber 19, static contact isolation switch 20 utilizes bolt, and fixedly inserts 15 is fixing by fixed contact, the bolt and nut that closes by flexible link 18 and the utmost point again makes movable end of vacuum arc extinguishing chamber 19 and static contact isolation switch 20 conductings, thereby with vacuum interrupter 5 conductings, the bolt and nut that vacuum extinction insulated tension pole 17 closes by the utmost point is fixed on the moved end side of vacuum interrupter 5.Isolating switch grounding contact 21 utilizes bolt, and fixedly inserts 16 is fixing by grounding contact, isolating switch moving knife 22 is fixed on the side that exposes of copper spare 13 in the outgoing line side sleeve pipe by screw bolt and nut, moving knife connecting lever 23 is installed on the isolating switch moving knife 22, an other end is connected with isolation switch insulation pull bar 24, the spacer for bolt that recycles at last inserts 14 and utmost point pass is assembled to whole pole in the switchgear, vacuum interrupter insulated tension pole 17 is connected with the isolation switch insulation pull bar respectively and is closed operating mechanism with the utmost point of switchgear and is connected, drives vacuum interrupter 5 and isolating switch moving knife 22 moves.

Claims

1. solid insulation pole includes a housing that is made of insulating barrier (2) and the ground plane (1) that scribbles thereof outward, is provided with on-load switch chamber and isolating switch chamber in the described housing; Vacuum interrupter (5) is equipped with in described on-load switch chamber, copper spare (7) and inlet wire side sleeve pipe (9) in the inlet wire side sleeve pipe; Static contact isolation switch (20) is equipped with in described isolating switch chamber, copper spare (13) in outgoing line side sleeve pipe (10) and the outgoing line side sleeve pipe, it is characterized in that: the moved end faying surface at described vacuum interrupter (5) is connected with radome (3), and described radome (3) is connected with described vacuum interrupter (5) moved end conducting by electric-conductor (4); Described radome (3) and be electrically connected with that copper spare (13) is located at described insulating barrier (2) inside in the described outgoing line side sleeve pipe of shading ring (12); The connecting hole end face of described static contact isolation switch (20) is provided with flange, described flange and the connecting hole end contact that is located at the fixed contact inserts (15) on the described housing.

2. solid insulation pole according to claim 1 is characterized in that: be provided with waterproof indent shirt rim outside the described inlet wire side sleeve pipe (9).