CN2337669Y

CN2337669Y - Outdoor single-electrode high-voltage isolating switch

Info

Publication number: CN2337669Y
Application number: CN 97245824
Authority: CN
Inventors: 蔡传庚
Original assignee: HIGH-VOLTAGE ELECTRICAL APPLIANCES FACTORY JIEXI COUNTY GUANGDONG PROV
Current assignee: HIGH-VOLTAGE ELECTRICAL APPLIANCES FACTORY JIEXI COUNTY GUANGDONG PROV
Priority date: 1997-10-10
Filing date: 1997-10-10
Publication date: 1999-09-08
Anticipated expiration: 2007-10-10

Abstract

The utility model relates to an outdoor high-voltage isolating switch, particularly an outdoor single-electrode high-voltage isolating switch. The utility model is arranged in view of the defects that the existing outdoor single-electrode high-voltage isolating switches are easy to produce electric arc in operation to cause elements to heat and deform, connecting wires are easy to loosen and jump spark, etc. The structure of the utility model is that the line type contact structure of a static contact piece (head) and a contact point of a knife switch of the existing switches is changed into a plane contact structure, and a wire connecting and wire pressing bolt is additionally arranged, so that the contact resistance of the switch is reduced, extreme passing current value is increased, and the wire connecting is firm. The utility model overcomes the defects existing in original switches, and enhances the service life of switches.

Description

Outdoor monopolar high-voltage isolating switch

The utility model relates to a kind of outdoor high-voltage isolating switch, particularly a kind of outdoor monopolar high-voltage isolating switch.

Outdoor monopolar high-voltage isolating switch is a kind of electric switch that is widely used on the high pressure electric line, it and distribution transformer, high-tension fuse, high-tension oil switch and High-voltage measuring box are used, in order to cut off, single-phase and the three-phase circuit of closed unloaded load, have simple in structure, handling safety, advantage easy to maintenance, but existing outdoor monopolar high-voltage isolating switch is because the defective on structural design, also there is weak point, the one, structurally, on the high-voltage switch gear, two planes of following static contact and the plane of blade of knife switch are vertical, by last, the edge of following static contact and a left side, the plane contact of right blade of knife switch, plug-in strip and last, following static contact is the line style contact, because the line style contact area is little, causes contact resistance big, the limit is little by electric current, be easy to generate electric arc, make the element heating distortion, the useful life of having reduced switch.The 2nd, the wiring pressing plate of existing switch is shorter, and has only a bolt to compress electricity (cable) line, and electricity (cable) line is loosening easily, causes the wiring loose contact, the arcing heating.

The purpose of this utility model is intended to improve the deficiencies in the prior art, provides a kind of contact resistance little, and the limit is big by electric current, is difficult for producing electric arc; Wiring is firm, is difficult for outdoor monopolar high-voltage isolating switch loosening, arcing.

The purpose of this utility model reaches by the following technical programs:

The outdoor monopolar high-voltage isolating switch of the utility model, comprise switch framework, upper and lower porcelain insulator, upper and lower terminal block, left and right blade of knife switch, plug-in strip hold-down bolt and holddown spring, plug-in strip stay hook and back-moving spring, it is characterized in that: following static contact is vertically welded in down on the terminal block, its two planes and left and right blade of knife switch plane parallel, following static contact has a circular hinge hole, and it is hinged to descend static contact and left and right blade of knife switch to compress by plug-in strip hold-down bolt and holddown spring, forms plane contact.Last static contact is vertically welded on the upper wiring board, its two planes and left and right blade of knife switch plane parallel, and behind the combined floodgate, last static contact becomes plane contact with left and right blade of knife switch.Above last static contact, rivet or weld a clasp, be used to fasten the stay hook of plug-in strip.In addition, strengthen the length of upper and lower terminal block and corresponding tension disc, and two bolts are set thereon, the wiring tension disc is fixed in respective patch panel and compresses electricity (cable) line.

For guaranteeing that left and right blade of knife switch contacts well with upper and lower static contact, the contact plane of left and right blade of knife switch and upper and lower static contact can the square or circular flat surface of punch forming for protruding.

The utility model is compared with prior art, has the following advantages:

1, the left and right blade of knife switch of the utility model high-voltage switch gear and upper and lower static contact are smooth plane contact, and the resistance of switch reduces, and the limit improves by current value, make switch be difficult for producing electric arc and heating distortion, the useful life of having improved switch when operation.

2, the utility model high-voltage switch gear is provided with two bolts that compress electricity (cable) line, makes wiring more firm, is difficult for loosening arcing.

Fig. 1: the utility model closure state front view.

Fig. 2: the utility model closure state vertical view.

Fig. 3: the utility model open mode front view.

Fig. 4: left blade of knife switch part drawing.

Number in the figure: 1, switch framework, 2, following porcelain insulator, 3, the line ball bolt, 4, following wiring pressing plate, 5, terminal block down, 6, static contact down, 7, touch the position under the blade of knife switch, 8, touch the position on the blade of knife switch, 9, back-moving spring, 10, plug-in strip stay hook, 11, plug-in strip clip, 12, go up static contact, 13, upper wiring board, 14, go up the wiring pressing plate, 15, go up porcelain insulator.16, left blade of knife switch, 17, right blade of knife switch, 18, the plug-in strip holddown spring, 19, the plug-in strip hold-down bolt.

In conjunction with the accompanying drawings the utility model is described in detail by the following examples:

Embodiment: the structure of the utility model embodiment such as Fig. 1, Fig. 2, shown in Figure 3.Specific as follows:

Following porcelain insulator 2 and last porcelain insulator 15 usefulness nuts are fixed on the switch framework 1, and following terminal block 5 and upper wiring board 13 usefulness hexagon socket head cap screws are fixed on corresponding insulation porcelain vase 2 and 15.At the external part of upper and lower terminal block, will go up wiring pressing plate 14 with 2 hex boltss respectively and be fixed on the corresponding terminal block with following wiring pressing plate 4.The following static contact 6 of switch is vertically welded in down on the terminal block 5, the plane parallel of its two planes and left blade of knife switch 16, right blade of knife switch 17, have a circular hinge hole on the following static contact 6, by hold-down bolt 19 and holddown spring 18 with left and right blade of knife switch 16,17 and following static contact 6 compress, hinged, make down static contact 6 and left and right blade of knife switch 16,17 one-tenth plane contact.Last static contact 12 is vertically welded on the upper wiring board 13, the plane parallel of its two planes and left and right blade of knife switch 16,17, and after switch closes a floodgate, last static contact 12 and left and right blade of knife switch 16,17 one-tenth plane contact.In the upper right side of last static contact 12, rivet or weld a clasp 11 that is used to fasten plug-in strip stay hook 10.Stay hook 10 usefulness nuts are fixed on the left blade of knife switch 16, and stay hook 10 is made up of hinged gib head and retainer ring, and by back-moving spring 9 gib head is resetted.Simultaneously, for guaranteeing that left and right blade of knife switch 16,17 contacts well with upper and lower static contact 6,12.The contact plane of left and right blade of knife switch 16,17 and upper and lower

static contact

6,12, all square or circular

flat surface

7 and 8 of punch forming for protruding.As shown in Figure 4.

Concrete structure size of the present utility model determines that according to the specification of product its material selection, processing technology and assemble method are all identical with prior art.

Claims

1, a kind of outdoor monopolar high-voltage isolating switch, comprise switch framework (1), following porcelain insulator (2), last porcelain insulator (15), following terminal block (5), upper wiring board (13), left side blade of knife switch (16), left side blade of knife switch (17), hold-down bolt (19), holddown spring (18), plug-in strip stay hook (10), back-moving spring (9), it is characterized in that: the following static contact (6) of switch is vertically welded in down on the terminal block (5), its two planes and a left side, right blade of knife switch (16,17) plane parallel, have a circular hinge hole on the following static contact (6), by hold-down bolt (19), holddown spring (18) is with a left side, right blade of knife switch (16,17) and following static contact (6) compress, hinged, a following static contact (6) and a left side, right blade of knife switch (16,17) become plane contact, last static contact (12) is vertically welded on the upper wiring board (13), its two planes and a left side, right blade of knife switch (16,17) plane parallel, after switch closes a floodgate, a last static contact (12) and a left side, right blade of knife switch (16,17) become plane contact, rivet or weld a clasp (11) that is used to fasten plug-in strip stay hook (10) on the last static contact (12), on following wiring pressing plate (4) and last wiring pressing plate (14), all be provided with two with wiring pressing plate (4,14) be fixed in corresponding terminal block and compress the bolt (3) of cable.

2, outdoor monopolar high-voltage isolating switch according to claim 1, it is characterized in that: the contact plane of left blade of knife switch (16), right blade of knife switch (17) and following static contact (6), last static contact (12) is stamping forming circle or square protrusion flat surface (7,8).