The conductive arm structure of high voltage isolator
The utility model relates to high pressure and ehv power transmission switchgear, specifically a kind of conductive arm structure of high voltage isolator.
High voltage isolator is mainly used to by needing the part having a power failure to isolate reliably with live part in high voltage distribution installation, to guarantee the safety of service work.The contact of isolating switch is all open in air, has obvious cut-off point, and there is no arc-control device, therefore can not be used for cutting off load current or short circuit current.Isolating switch can also be used to carry out the handover operation of some circuit, to change the operational mode of system.For example: in double-bus circuit, can operating circuit be switched to another bus from a bus with isolating switch.
As shown in Figure 1 and Figure 2, the current-carrying part of high voltage isolator comprises conductive arm 2, and one end of conductive arm 2 is fixed with base 3, and its other end is fixed with contact 1; Base 3 is arranged on the top of insulator, and connecting terminal block 7 is installed on base 3, and connecting terminal block 78 is connected with conductive arm 2 by being flexible coupling, when conductive arm 2 divide-shut brake by 8 flexible the fixing of binding posts that guarantee that are flexible coupling.Current domestic related switch producer adopts copper pipe or aluminum pipe to make conductive arm 2, and the conductive arm 2 water conservancy diversion amounts of this structure are not strong, and caloric value is high, and is difficult for heat radiation.In addition, because use is flexible coupling 8, while causing disconnecting link opening and closing lock, the wire connecting is produced to certain torsion and operating work large, product maintenance cost increases.
Summary of the invention
The utility model, for the problems referred to above, provides a kind of conductive arm structure of high voltage isolator, and this conductive arm structure flow conductivity is strong, stable performance.
According to the technical solution of the utility model: a kind of conductive arm structure of high voltage isolator, comprise conductive arm, one end of described conductive arm is fixed with base, and its other end is fixed with contact; Described conductive arm is made by aluminium alloy П section bar.
Described base is bolted on described conductive arm.
Rotating shaft is rotatably installed on described base, on described rotating shaft, is fixed with terminal board, be fixed with multi-disc spring leaf on described rotating shaft, the free end of described spring leaf contacts with described base.
The material of described rotating shaft is copper.
Described spring leaf adopts copper spring sheet.
The outer surface of described copper spring sheet is provided with silver coating.
The material of described contact is copper, and its surface is provided with silver coating.
The thickness of described silver coating is 20 μ.
Technique effect of the present utility model is: conductive arm is made by aluminium alloy П section bar, has strengthened guide performance, is easy to dissipation of heat; Base and conductive arm are with bolts, are convenient to assembling, maintenance; Terminal board carries out 360 ° of rotations by rotating shaft, can not produce any torsion to the wire connecting, and can reduce the operating work of isolating switch divide-shut brake.
Accompanying drawing explanation
Fig. 1 is existing conductive arm
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is for adopting the structural representation of the present utility model of male contact.
Fig. 4 is the upward view of Fig. 3.
Fig. 5 is for adopting the structural representation of the present utility model of female contact.
Fig. 6 is the upward view of Fig. 5.
Fig. 7 is the structural representation of application isolating switch of the present utility model.
Fig. 8 is the vertical view of Fig. 7.
Fig. 9 is the left view of Fig. 7.
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
In Fig. 1～Fig. 9, comprise contact 1, conductive arm 2, base 3, rotating shaft 4, terminal board 5, contact 6, connecting terminal block 7, be flexible coupling 8, male conductive arm assembly 10, female conductive arm assembly 20, insulator 30 etc.
As shown in Fig. 7～Fig. 9, the every a pair of male conductive arm assembly cooperatively interacting 10 and female conductive arm assembly 20 of comprising mutually of isolating switch, they are arranged on respectively the top of insulator 30.
Being the structure of male conductive arm assembly 10 as shown in Figure 3, Figure 4, is the structure of female conductive arm assembly 20 as shown in Figure 5, Figure 6.The conductive arm structure of these two kinds of conductive arm assemblies, includes conductive arm 2, and conductive arm 2 is made by aluminium alloy П section bar.Adopt such design, increased the surface area of conductor, the one, met the skin effect of electric current, strengthened the guide performance of conductor; The 2nd, solved the heat dissipation problem in running, because being adopts aluminium alloy П section bar as conductive arm, make its inside and outside all directly exposed in air, be easy to conductor due to the dissipation of heat of through-flow generation.
One end of conductive arm 2 is fixed with base 3, and base 3 is bolted on conductive arm 2, is convenient to assembling, maintenance.
The other end of conductive arm 2 is fixed with contact 1,6; Contact 1 is male contact, and contact 6 is female contact.The material of contact 1,6 is copper, in order to strengthen its electric conductivity and empty oxidation susceptibility, on its surface, is provided with silver coating.The thickness of silver coating is 20 μ.
Rotating shaft 4 is rotatably installed on base 3, rotating shaft 4 can 360 ° rotation arbitrarily, its material is copper.Rotating shaft 4 is Seal Design, can not be subject to drenching with rain and the erosion of dust, thereby corrosion and the oil ageing of bearing have been prevented, so be non-maintaining, non-lubricating, guarantee the reliability service of rotating shaft 4 within phase equipment life, without maintenance, realize non-maintaining function, therefore can save product maintenance cost, increase product applicability, reduce the maintenance cost of equipment.
On rotating shaft 4, be fixed with terminal board 5, rotating shaft 4 is crimped on terminal board 5, can guarantee its through-current capability, and terminal board 5 can carry out 360 ° of rotations by rotating shaft 4, thereby can not produce any torsion to the wire connecting.Due to without any torsion, can reduce the operating work of isolating switch divide-shut brake.
On rotating shaft 4, being fixed with multi-disc spring leaf, is 39 in the present embodiment, and the free end of spring leaf contacts with base 3.Spring leaf adopts copper spring sheet, and the outer surface of copper spring sheet is provided with silver coating.Rotating shaft 4 is guided to electric current on conductive arm 2 by silver-plated copper spring sheet.
The utility model has reduced conducting rod materials'use, has saved social resources, has reduced manufacturing cost, meets China and advocates Environmental Design theory, has improved the competitiveness of integral device.