CN2864959Y - High-voltage circuit-breaker - Google Patents
High-voltage circuit-breaker Download PDFInfo
- Publication number
- CN2864959Y CN2864959Y CN 200620029809 CN200620029809U CN2864959Y CN 2864959 Y CN2864959 Y CN 2864959Y CN 200620029809 CN200620029809 CN 200620029809 CN 200620029809 U CN200620029809 U CN 200620029809U CN 2864959 Y CN2864959 Y CN 2864959Y
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- conductor
- contact
- jet pipe
- cylinder
- air chamber
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Abstract
A high voltage breaker static contact is provided in a fixed large conductor equipped with guide bushing, wherein voltage sharing cover with a constant contact is equipped. A movable contact with inclining path is equipped in the cylinder whose cavity is provided with an open-work. A movable contact ring, wherein a moving contact equipped on the movable contact, is equipped in the cylinder close to one terminal of the static contact device. One terminal of an effuser connects with the cavity of the movable contact ring and the other terminal connects with the guiding cover. The fore of the conductor connects with acylinder cavity through belt fingers, and a valve board which forms air chamber connection between a piston compression air chamber and the conductor is equipped in the conductor. The effuser of the movable contact is provided in the cylinder. The breaker is capable of normal operation in paramos of -40 Deg C and is energy saving and environmental protective.
Description
Technical field
The utility model relates to power equipment, particularly a kind of primary cut-out that still can cut-off the 50kA short circuit current under-40 ℃ of ambient temperatures.
Background technology
Primary cut-out mainly is to be used for suiting rated current and fault current; conversion line; realization is to the equipment of the control and the protection of transmission line, and it is important control of electric power system and protection equipment, plays a part very important to the power system security reliability service.
Sulfur hexafluoride breaker is widely used in electric power system already, its specified sulphur hexafluoride the blowing pressure of this series products of the 252kV electric pressure of using is essentially 0.6MPa at present, the short circuit current connecting-disconnecting function is generally 50kA, this series products is not less than-30 ℃ area and can uses preferably in ambient temperature, but when ambient temperature is lower than-30 ℃, sulphur hexafluoride is with partial liquefaction, and effective pressure will progressively reduce, and insulating capacity and connecting-disconnecting function also will decrease.When ambient temperature was reduced to-40 ℃, its pressure only had 0.344MPa.Therefore, this product can not satisfy the needs of extremely frigid zones.
For satisfying the urgent need of extremely frigid zones power consumer, high-voltage switch gear manufactory had once taked following measures: the one, and heating, promptly in circuit breaker sulfur hexafluoride air cell inside or the outer setting heater, and control automatically by intelligent temperature controller, when ambient temperature is reduced to subzero, thermostat is connected heater power source and is heated making sulfur hexafluoride air cell, thereby makes the sulfur hexafluoride air cell temperature remain at the connecting-disconnecting function that keeps 50kA more than-30 ℃.The 2nd, adopt mist: SF
6+ N
2Or SF
6+ CF
4, preceding a kind of method is very undesirable for the result of use of outdoor porcelain knob breaker, because if heater is placed on the sulfur hexafluoride air cell outside, heats will be very poor so; If heater is placed on sulfur hexafluoride air cell inside, almost be to change in case heater damages, so this method seldom adopts.Though a kind of method in back can solve a part of problem, because the gas of two kinds of high pressures mixes, its leak rate difference has brought many inconvenience for use, detection, the management of product, therefore can not be promoted.
Summary of the invention
The purpose of this utility model provide a kind of can be under-40 ℃ of ambient temperatures, the primary cut-out that can normally use still.
The utility model purpose is achieved through the following technical solutions: this circuit breaker comprises static contact head device, jet pipe and trigger device; Fixed contact in static contact head device is positioned at fixing big conductor, near trigger device one end grading shield is housed at big conductor, and permanent contact is arranged in it; The moving contact of trigger device is arranged in cylinder, has open-work on the chamber wall of moving contact, and access ramp is arranged on the moving contact, and it communicates the interior chamber of air chamber and jet pipe; Cylinder is equipped with the movable contact ring near static contact head device one end, and the current collector that is assemblied on the moving contact is arranged in the movable contact ring; One end of jet pipe contacts with the inwall of movable contact ring; On the fixing big conductor inwall in static contact head device fairlead is housed; Fairlead limit jet pipe outside fixed contact by moving axially; The current collector periphery is equipped with auxiliary nozzle; Match by band shape fingertip with the inwall of cylinder in the front portion of conductor, the valve plate that the piston pressurized air chamber is communicated with the air chamber that is formed by conductor is housed in the conductor; Open-work on the moving contact is positioned at cylinder; The other end of jet pipe contacts with fairlead.
One end of described jet pipe is the forearc area, the other end is the water conservancy diversion district, the centre is an expansion regions, there is bulge loop the end of forearc area outer wall, jet pipe one end is that the outer wall by bulge loop contacts with the inwall of movable contact ring, the end of water conservancy diversion district outer wall is fluted, and annular ring is housed in the groove, and the other end of jet pipe is closely to contact with fairlead by annular ring; The inner chamber of forearc area becomes horn-like, and the position internal diameter minimum adjacent with expansion regions.
Lead also is housed in conductor, and is contained in the annular valve plate on the lead, on the valve plate, have two through holes at least.
There is cannelure the front portion of conductor, and band shape fingertip is housed in the cannelure, and conductor closely contacts with the inwall of cylinder mutually by the fingertip that is equipped with in the cannelure.
The internal diameter at position is greater than 1～2 millimeter of the external diameter of fixed contact in the forearc area cavity of jet pipe, in the expansion regions cavity near the internal diameter of forearc area end less than internal diameter near water conservancy diversion district end.
The trumpet-shaped intracavity section in forearc area is to be connected with inwardly recessed arc is slick and sly being inwardly protruded arc near expansion regions one end, and inside recessed arc is that 3～5 ° straight line is connected with gradient again;
The end shape of grading shield is the annular sphere of projection.
Because the utility model is a kind ofly to comprise that two are arranged on a contact circuit breaker between fracture, it is to make full use of arc energy to come arc blow-out, blow-out with the raising cylinder pressure of calming the anger; Therefore the arc control device gas pressure is 0.4MPa under-40 ℃ of ambient temperatures, connecting-disconnecting function reaches 50kA, even if therefore also can normally use at this circuit breaker of the extremely frigid zones of-40 ℃ of ambient temperatures, in addition because this product makes its specified sulphur hexafluoride pressure have only 0.4MPa, compare with the 0.6MPa product, both are under identical ambient temperature conditions, the use amount of sulfur hexafluoride gas and discharge capacity will reduce 1/3rd, have reached the effect of not only energy-conservation but also environmental protection.
Description of drawings
Fig. 1 is the cutaway view that is in closure state of the present utility model;
Fig. 2 is the cutaway view of jet pipe in the utility model;
Fig. 3 is the cutaway view of the another kind of structure of jet pipe in the utility model;
Fig. 4 is when steam vent does not go out piston in the utility model separating brake process and the cutaway view schematic diagram of heat transfer process;
Fig. 5 is the cross-sectional schematic of gas flow direction when steam vent has gone out piston and electric arc and soon extinguishes in the utility model separating brake process.
Embodiment
Embodiment: this circuit breaker comprises static contact head device, jet pipe and trigger device; Fixed contact 1 in static contact head device is positioned at fixing big conductor 22, near trigger device one end grading shield 26 is housed at big conductor 22, permanent contact 6 is arranged in it, grading shield 26 can be assemblied on the fixing permanent contact 6, but both have certain interval, on fixing big conductor 22 inwalls fairlead 20 are housed;
The moving contact 8 of trigger device is arranged in cylinder 16, and cylinder is equipped with movable contact ring 14 near static contact head device one end, and the current collector 2 and the auxiliary nozzle 7 that are assemblied on the moving contact 8 are arranged in the movable contact ring 14, and current collector 2 and moving contact 8 are hollow structure; Current collector 2 can lean on screw fit to moving contact 8, and auxiliary nozzle 7 can lean on screw fit to current collector 2, and an end face of auxiliary nozzle 7 contacts with a face of moving contact.
One end of jet pipe 4 is positioned at movable contact ring 14, and this end outer wall contacts with movable contact ring 14 inwalls; And the sealing of an end of cylinder 16, this end of jet pipe 4 is forearc area 4a, and there is bulge loop 4d the end of forearc area outer wall, and an end of jet pipe 4 then is to lean on the outer wall of bulge loop 4d to contact with the inwall of movable contact ring 14; The other end of jet pipe 4 is water conservancy diversion district 4c, the end fluted 4 of water conservancy diversion district outer wall ", groove 4 " in annular ring 21 is housed, the other end of jet pipe 4 then is closely to contact with fairlead 20 by annular ring 21; And fairlead 20 limit jet pipes 4 in fixed contact 1 outside by moving axially.The inner chamber 9 of jet pipe 4 " mid portion is expansion regions 4b; in the expansion regions 4b cavity near the internal diameter of forearc area 4a end less than internal diameter near water conservancy diversion district 4c end; the inner chamber of forearc area (4a) becomes horn-like; the Q position internal diameter minimum adjacent with expansion regions 4b, but its internal diameter is greater than 1～5 millimeter of the external diameter of fixed contact 1;
The other end outer wall of jet pipe 4 also can be set to a projection, and the annular ring that insulating material is made is housed on projection, is closely contacted with fairlead 20 by the annular ring on the projection.
The structure of jet pipe 4 also can adopt the structure as Fig. 3, and promptly the inner chamber of expansion regions 4b and water conservancy diversion district 4c is the cavity of same tapering in the jet pipe 4, and the radial section of this two positions cavity is long-pending is increased gradually to water conservancy diversion district 4c by expansion regions 4b.
Have open-work a on the chamber wall of the moving contact 8 of trigger device, open-work a is positioned at cylinder 16; Formed piston pressurized air chamber 9 between the outer wall of moving contact 8 and cylinder 16 inwalls, also had access ramp 9 ' on the moving contact 8, it makes the interior chamber 9 of piston pressurized air chamber 9 and jet pipe 4 " communicate; Match with the inwall of cylinder 16 in the front portion of conductor 24, the valve plate 18 that can make piston pressurized air chamber 9 and be communicated by the air chamber 15 that conductor 24 forms is housed in the conductor 24.Lead 13 also is housed in the conductor 24, and is contained in the annular valve plate 12 on the lead 13, on the valve plate 18, have two through holes 17 at least, these through holes can be the through hole of regular shape, also can be special-shaped through hole, on the through hole 17 check-valves are housed;
There is cannelure 23 ' front portion of conductor 24, and band shape fingertip 23 is housed in the cannelure 23 ', and conductor 24 closely contacts with the inwall of cylinder 16 mutually by the fingertip 23 that is equipped with in the cannelure 23 '.
4a trumpet-shaped inner chamber in forearc area is to be the cambered surface of all inwardly protrudings near expansion regions 4b one end, and this cambered surface and inwardly recessed slick and sly connection of all cambered surfaces, inside recessed all cambered surfaces are that 3-5 ° taper inner chamber is connected with gradient again; So that forearc area 4a is forming a little local trunnion 4 ' near 0 position.
For grading shield 26 when the electrion also can keep smooth, its end shape be set to the annular sphere cover 26 of projection '.
In order to guarantee fine contact of movable contact ring 14 outer surfaces and fixing permanent contact 6 inner surfaces.On 6 outer surfaces of fixing permanent contact ring-shaped cylinder shape spring 25 is housed; Centre position at fixing permanent contact 6 inner surfaces is equipped with retainer ring 27, is used to limit the fixing permanent contact 6 of a plurality of lobe shapes and is out of shape to the center; Fixing permanent contact 6 can adopt screw connecting mode that it is assemblied on 22 1 end faces of fixed conductor, and makes their tight contacts.Fixed contact 1 afterbody is fixed on the big conductor 22 by screw thread, and firmly contact with it.
Grading shield 26 aluminium manufacturings,
Fixed contact 1 is formed by resistant to elevated temperatures metal material and electric conducting material sintering.
Institute's filling medium is a sulphur hexafluoride in this circuit breaker.
The behaviour in service of this circuit breaker and gas flow situation are as follows:
Fashionable when this circuit breaker closing, fixed contact 1 passes the trunnion 4 ' of jet pipe 4, and the trunnion 7 ' of auxiliary nozzle 7 enters the hollow current collector 2 that AX vertically is positioned at the trunnion upstream, as shown in Figure 1.
The expansion regions 4b of trunnion 7 ' and jet pipe 4 is for limiting a space that is used to disconnect electric arc, and this electric arc is in discharge between fixed contact 1 and current collector 2 during the cut-off breaker.This space as shown in Figures 4 and 5.
This circuit breaker space is by being positioned at the access ramp 9 ' and air chamber 9 on piston pressurized air chamber 9 and the moving contact 8 " be connected.
When fixed contact 1 separates with current collector 2 and moment of producing electric arc, contact dielectric gas herein is pressurized because of being heated.Gas after being heated is by piston pressurized air chamber 9 ", the hollow channel by access ramp 9 ' and current collector 2 flows to piston pressurized air chamber 9.As shown in Figure 4.Along with moving contact 8 moves along axial AX, this pressure rises and produces one from the thermal current of piston pressurized air chamber 9 to the dielectric gas in circuit breaker space.When this circuit breaker disconnects certain distance, be kept at the pressurized and process passage 9 of dielectric gas in the piston pressurized air chamber 9 " space of opening circuit of backflowing to.By the heating of electric arc, increase the pressure in the air chamber, the flow rate that enters the dielectric gas in the space of opening circuit with increase simultaneously to dielectric gas.When the mobile fixed contact 1 that makes of auxiliary nozzle 7 withdraws from from trunnion 7 ', at piston pressurized air chamber 9 " pressure thermal medium gas flow in the fixing big conductor 22 shape chambeies by the passage around the fixed contact 1.Moving contact 8 continues to move along axial AX, and fixed contact 1 also moves along axial AX with respect to moving contact 8, and trunnion 4 ' passage is opened, and is kept at the trunnion 4 ' that piston pressurized air chamber 9 interior thermal medium gases pass jet pipe 4, blows the outage arc and disconnects big electric current.Subsequently, piston pressurized air chamber 9 heated pressed gas are discharged into air chamber 15 by the hollow channel of contact 2 by elongated hole 8 '.As shown in Figure 5.
Circuit breaker closing is fashionable, and it is big that the space of pressurized air chamber 9 becomes, and the pressure of dielectric gas reduces, and 15 two air chambers of piston pressurized air chamber 9 and air chamber form a pressure differential, and the pressure of air chamber 15 is greater than the pressure of piston pressurized air chamber 9.The dielectric gas of air chamber 15 promotes annular valve plate 12 having under lead 13 guide effects, moves a certain distance along axial AX; Dielectric gas flow into piston pressurized air chamber 9 by the valve plate 18 that the irregularly-shaped hole passage is arranged.Simultaneously, the gas between fixed contact 1 and the current collector 2 is by air chamber 9 ", the hollow channel by access ramp 9 ' and current collector 2 flows to piston pressurized air chamber 9.Fixed contact 1 is with after current collector 2 contacts, movable contact ring 14 with permanent contact 6 is also very fast contacts, electric current is close under certain pressure on cylinder 16 inwalls of handling through surface treatment and is slided by the band shape fingertip 23 on the big conductor 24, sets up big current path at movable contact ring 14 and permanent contact 6.
Shown in Fig. 4 and Fig. 5 the position in, being blown into the gas that disconnects the space comprises by from the cold air of air chamber 9 with by air chamber 9 "; by the hollow channel of access ramp 9 ' and current collector 2, flow to the admixture of gas that the hot gas of piston pressurized air chamber 9 is formed.By this set, the temperature of dielectric gas raises and the pressure rising, thereby has further strengthened the circuit breaker capacity.
The line of band small arrow is represented heat transferred and gas flow direction among Fig. 4 and Fig. 5.
Claims (7)
1, a kind of primary cut-out comprises static contact head device, jet pipe and trigger device; Fixed contact in static contact head device (1) is positioned at fixing big conductor (22), near trigger device one end grading shield (26) is housed at big conductor (22), and permanent contact (6) is arranged in it; The moving contact of trigger device (8) is arranged in cylinder (16), has open-work a on the chamber wall of moving contact (8), and moving contact has access ramp (9 ') on (8), and it communicates chamber in air chamber (9) and the jet pipe (9 "); Cylinder is equipped with movable contact ring (14) near static contact head device one end, and the current collector (2) that is assemblied on the moving contact (8) is arranged in the movable contact ring (14); One end of jet pipe (4) contacts with the inwall of movable contact ring (14); It is characterized in that: on fixing big conductor (22) inwall in static contact head device fairlead (20) is housed; Fairlead (20) limit jet pipe (4) outside fixed contact (1) by moving axially; Current collector (2) periphery is equipped with auxiliary nozzle (7); Match by band shape fingertip (23) with the inwall of cylinder (16) in the front portion of conductor (24), the valve plate (18) that piston pressurized air chamber (9) is communicated with the air chamber (15) that is formed by conductor (24) is housed in the conductor (24); Open-work a on the moving contact (8) is positioned at cylinder (16); The other end of jet pipe (4) contacts with fairlead (20).
2, circuit breaker according to claim 1, it is characterized in that: an end of described jet pipe (4) is forearc area (4a), the other end is water conservancy diversion district (4c), the centre is expansion regions (4b), there is bulge loop (4d) end of forearc area outer wall, jet pipe one end is that the outer wall by bulge loop (4d) contacts with the inwall of movable contact ring (14), the end of water conservancy diversion district outer wall fluted (4 "); groove is equipped with annular ring (21) in (4 "), and the other end of jet pipe (4) is closely to contact with fairlead (20) by annular ring (21); The inner chamber of forearc area (4a) becomes horn-like, and position (Q) the internal diameter minimum adjacent with expansion regions (4b).
3, circuit breaker according to claim 1 and 2 is characterized in that: lead (13) also is housed in conductor (24), and is contained in the annular valve plate (12) on the lead (13), on the valve plate (18), have two through holes at least.
4, circuit breaker according to claim 3, it is characterized in that: there is cannelure (23 ') front portion of conductor (24), band shape fingertip (23) is housed in the cannelure (23 '), and conductor (24) closely contacts with the inwall of cylinder (16) mutually by the fingertip (23) that is equipped with in the cannelure (23 ').
5, circuit breaker according to claim 4, it is characterized in that: in forearc area (4a) cavity of jet pipe (4) internal diameter at (Q) position greater than 1～2 millimeter of the external diameter of fixed contact (1), in expansion regions (4b) cavity near the internal diameter of forearc area (4a) end less than internal diameter near water conservancy diversion district (4c) end.
6, circuit breaker according to claim 5, it is characterized in that: the trumpet-shaped intracavity section in forearc area (4a) is to be connected with inwardly recessed arc is slick and sly being inwardly protruded arc near expansion regions (4b) end, and inside recessed arc is that 3～5 ° straight line is connected with gradient again.
7, circuit breaker according to claim 6 is characterized in that: the end shape of grading shield (26) is the annular sphere of projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620029809 CN2864959Y (en) | 2006-01-13 | 2006-01-13 | High-voltage circuit-breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620029809 CN2864959Y (en) | 2006-01-13 | 2006-01-13 | High-voltage circuit-breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2864959Y true CN2864959Y (en) | 2007-01-31 |
Family
ID=37677409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620029809 Expired - Fee Related CN2864959Y (en) | 2006-01-13 | 2006-01-13 | High-voltage circuit-breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2864959Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000837B (en) * | 2006-01-13 | 2010-06-09 | 河南平高电气股份有限公司 | High voltage circuit breaker |
| CN103008133A (en) * | 2012-12-04 | 2013-04-03 | 卢瑞兴 | Control device of anti-static switch of flock printing screen printer |
| CN102177565B (en) * | 2008-10-09 | 2013-11-27 | 阿尔斯通技术有限公司 | Cutoff chamber for high-voltage circuit breaker with improved arc quenching |
-
2006
- 2006-01-13 CN CN 200620029809 patent/CN2864959Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000837B (en) * | 2006-01-13 | 2010-06-09 | 河南平高电气股份有限公司 | High voltage circuit breaker |
| CN102177565B (en) * | 2008-10-09 | 2013-11-27 | 阿尔斯通技术有限公司 | Cutoff chamber for high-voltage circuit breaker with improved arc quenching |
| CN103008133A (en) * | 2012-12-04 | 2013-04-03 | 卢瑞兴 | Control device of anti-static switch of flock printing screen printer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070131 Termination date: 20100219 |