CN102543555A

CN102543555A - Medium voltage type gas insulation disconnecting switch

Info

Publication number: CN102543555A
Application number: CN2011104503114A
Authority: CN
Inventors: 沈国祥; 茅养平; 尚立颖; 肖强
Original assignee: YIZHENG ELECTROCERAMICS ELECTRIC APPLIANCE CO Ltd
Current assignee: YIZHENG ELECTROCERAMICS ELECTRIC APPLIANCE CO Ltd
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2012-07-04

Abstract

The invention discloses a medium voltage type gas insulation disconnecting switch and relates to a switch, which belongs to a switch blade type and can realize three positions of switch-on, switch-off and earthing. A detachable contact point of the disconnecting switch is in a multi-contact-finger structure, and a contact finger and a static contact head are in sphere contact to realize automatic centering and ensure the contact of the static contact head, the contact finger and a contact blade reliable. For the undetachable contact point of the contact blade and a conducting rod, a circular ring is pressed on the contact blade to ensure the good contact of the contact blade and the conducting rod. The contact blade excluding the contact part is coated with dark color paint to reduce radiation and reduce temperature rise. All parts of the medium voltage type gas insulation disconnecting switch are in fillet design and have no closed angles. Electric fields are distributed uniformly, and the insulation level is improved. The medium voltage type gas insulation disconnecting switch not only can be manually operated but also can be electrically operated.

Description

Pressure type air insulated isolation switch in a kind of

Technical field

The present invention relates to a kind of switch, particularly a kind of manufacturing technology field of air insulated isolation switch.

Background technology

At present; At home in the medium pressure gas insulated metal enclosed switch equipment; Three station isolation earthing switch of domestic use generally adopt the rotary and Direct Action Type of disconnecting link, and disconnecting link rotary separation switch moving knife will be taken into account three positions, and the anglec of rotation is bigger; The bad decomposition of power from the operation rotating shaft is transmitted makes the operating physical force of isolating switch bigger; And common disconnecting link formula isolating switch does not have high-current switch; The Direct Action Type isolating switch requires the accuracy of manufacture high, and the processing difficulties cost is high.

Summary of the invention

The object of the present invention is to provide a kind of seriation, contact is reliable, insulation is good, the life-span is long, processing is simple, reliably in the pressure type air insulated isolation switch.

The present invention includes gas tank casing, final drive shaft, driven shaft, connecting lever, pull bar, post insulator, touch base, fingertip, contact knife, bushing insulator, grounding contact, conducting rod; Said final drive shaft is set in the bottom of gas tank casing through movable sealing; Said final drive shaft is in transmission connection through bevel gear and driven shaft, and said connecting lever is fixed on the said driven shaft, and said post insulator is fixed on a side of said gas tank box house; Said touch base is fixed on the said post insulator; Said fingertip is arranged on the said touch base, and said bushing insulator is fixed on the bottom of said gas tank casing, and said conducting rod is arranged in the said bushing insulator; Said contact knife is movably connected in the upper end of said conducting rod; Said grounding contact is arranged in the opposite side of gas tank box house, and an end of said pull bar is hinged and connected to the middle part of said contact knife, and the other end of said pull bar is hinged and connected on the said connecting lever; The one side of the said fingertip that contacts with touch base is provided with spherical surface hill, on said touch base, is provided with beveled aperture, and the spherical surface hill on the said fingertip contacts with the touch base beveled aperture, at said contact knife and conducting rod contact site annulus is set.

The present invention drives final drive shaft through electronic or man-operating mechanism, and final drive shaft drives driven shaft through bevel gear, makes connecting lever drive contact knife and rotates around conducting rod, when contact knife contacts with fingertip, then is in "on" position; When contact knife contacts with grounding contact, then be in the switch ground state; When contact knife is in fingertip and grounding contact centre position, switch is in gate-dividing state.

The present invention is provided with spherical surface hill in the one side of the fingertip that contacts with touch base, on touch base, is provided with beveled aperture, and this set is in order to realize self-centering, and fingertip contacts more reliable with touch base, contact knife; At contact knife and conducting rod contact site annulus is set in addition, guaranteed like this between contact knife and the conducting rod contact good.

The present invention the dark coat of paint and can reduce radiation except that with contact knife surface the contact knife surface that fingertip and conducting rod contact the dark coat of paint being set, and reduces temperature rise.

Connect with the arc surface transition respectively between each adjacent surface of touch base of the present invention, fingertip, contact knife, grounding contact, conducting rod; This set can make that Electric Field Distribution is even, improves insulation level.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is that the A-A of Fig. 1 is to view;

Fig. 3 is a kind of structural representation of fingertip;

Fig. 4 is a kind of structural representation of touch base;

Fig. 5 is that the A-A of Fig. 4 is to view;

Fig. 6 is a kind of structural representation of contact knife;

Fig. 7 is that the A-A of Fig. 6 is to view;

Fig. 8 is a kind of structural representation of grounding contact.

Among the figure, 1, the gas tank casing, 2, final drive shaft, 3, connecting lever, 4, pull bar; 5, post insulator, 6, touch base, 7, fingertip, 8, contact knife, 9, bushing insulator; 10, grounding contact, 11, conducting rod, 12, spherical surface hill, 13, annulus; 14, the dark coat of paint, 15, beveled aperture, 16, bevel gear, 17, driven shaft.

Embodiment

Like Fig. 1,2,3,4,5,6, shown in 7, pressure type air insulated isolation switch in this comprises gas tank casing 1, final drive shaft 2, driven shaft 17, connecting lever 3, pull bar 4, post insulator 5, touch base 6, fingertip 7, contact knife 8, bushing insulator 9, grounding contact 10, conducting rod 11; Final drive shaft 2 is set in the bottom of gas tank casing 1 through movable sealing; Final drive shaft 2 is in transmission connection through bevel gear 16 and driven shaft 17, and connecting lever 3 is fixed on the driven shaft 17, and post insulator 5 is fixed on a side of gas tank casing 1 inside; Touch base 6 is fixed on the post insulator 5; Fingertip 7 is arranged on the touch base 6, and bushing insulator 9 is fixed on the bottom of gas tank casing 1, and conducting rod 11 is arranged in the bushing insulator 9; Contact knife 8 is movably connected in the upper end of conducting rod 11; Grounding contact 10 is arranged in the opposite side of gas tank casing 1 inside, and an end of pull bar 4 is hinged and connected to the middle part of contact knife 8, and the other end of pull bar 4 is hinged and connected on the connecting lever 3; The one side of the fingertip 7 that contacts with touch base 6 is provided with spherical surface hill 12, on touch base 6, is provided with beveled aperture 15, and the spherical surface hill 12 on the fingertip 7 contacts with touch base 6 beveled aperture 15, in contact knife 8 and conducting rod 11 contacts site annulus 13 is set.

Like Fig. 6, shown in 7, pressure type air insulated isolation switch in this, it is provided with the dark coat of paint 14 on contact knife 8 surfaces except that the contact knife that contacts with fingertip 7 and conducting rod 11 8 surfaces.

Like Fig. 3,4,5,6,7, shown in 8, connect with the arc surface transition respectively between each adjacent surface of the touch base 6 of pressure type air insulated isolation switch, fingertip 7, contact knife 8, grounding contact 10, conducting rod 11 in this.

Claims

1. pressure type air insulated isolation switch in a kind; Comprise gas tank casing, final drive shaft, driven shaft, connecting lever, pull bar, post insulator, touch base, fingertip, contact knife, bushing insulator, grounding contact, conducting rod, said final drive shaft is set in the bottom of gas tank casing through movable sealing, and said final drive shaft is in transmission connection through bevel gear and driven shaft; Said connecting lever is fixed on the said driven shaft; Said post insulator is fixed on a side of said gas tank box house, and said touch base is fixed on the said post insulator, and said fingertip is arranged on the said touch base; Said bushing insulator is fixed on the bottom of said gas tank casing; Said conducting rod is arranged in the said bushing insulator, and said contact knife is movably connected in the upper end of said conducting rod, and said grounding contact is arranged in the opposite side of gas tank box house; One end of said pull bar is hinged and connected to the middle part of said contact knife, and the other end of said pull bar is hinged and connected on the said connecting lever; The one side that it is characterized in that the said fingertip that contacts with touch base is provided with spherical surface hill, on said touch base, is provided with beveled aperture, and the spherical surface hill on the said fingertip contacts with the touch base beveled aperture, at said contact knife and conducting rod contact site annulus is set.

2. according to claim 1 a kind of in the pressure type air insulated isolation switch, it is characterized in that except that the dark coat of paint being set with contact knife surface the contact knife surface that fingertip and conducting rod contact.

3. according to claim 1 and 2 a kind of in the pressure type air insulated isolation switch, it is characterized in that connecting with the arc surface transition respectively between each adjacent surface of described touch base, fingertip, contact knife, grounding contact, conducting rod.