CN1577685A - Withdrawing device with mechanical interlock for Large current plastic casing type circuit breaker - Google Patents
Withdrawing device with mechanical interlock for Large current plastic casing type circuit breaker Download PDFInfo
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- CN1577685A CN1577685A CN 03144098 CN03144098A CN1577685A CN 1577685 A CN1577685 A CN 1577685A CN 03144098 CN03144098 CN 03144098 CN 03144098 A CN03144098 A CN 03144098A CN 1577685 A CN1577685 A CN 1577685A
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- Prior art keywords
- circuit breaker
- sector gear
- slide plate
- linking lever
- housing
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Abstract
The mechanically locking withdrawn device for great current breaker casing includes one screw installed to the bottom of the casing for matching the nut in a slide plate, the slide plate with gear racks, one pair of sector gears on two inside walls and meshed with the gear racks, one link rod with one end connected to the cranks and the other end connected to the cam in the central position, one locking lever matching with one sector gear and pulled with one spring possessing the other end fixed to the casing, one roller on the locking level contacting closely with the outer edge of the sector gear and one pair of two-channel guide rails. It reaches the requirement of relevant standard and can ensure the safe operation of breaker.
Description
One, technical field
Mold cased circuit breaker parts in a kind of low-voltage electrical apparatus of the present invention field refer in particular to the withdrawing device that is used for big electric current mold cased circuit breaker.
Two, background technology
Along with the develop rapidly of my modernization and power industry, jumbo low-voltage circuit breaker has obtained using widely, and especially the consumption of pull-out type universal circuit breaker (as homemade DW45 series, the AE of Mitsubishi series and ABBEmax) constantly increases.In recent years, homemade jumbo plastic casing formula (plastic shell) circuit breaker (as DZ20J-1250, DZ20J-2000), also obtained developing faster because price is low, but owing to there is not withdrawing device, installation, maintenance, transposing inconvenience fail to obtain to adopt and restricted development in some important occasions.Once there were some producers also to do the work of this respect, but owing to there is not reliable interlock, fail safe and poor reliability and do not adopted widely.Mold cased circuit breaker is a kind of safe, reliable, economic low-voltage circuit breaker, but when development pull-out type structure, the pull-out type structure of diverting from one use to another the universal mold cased circuit breaker has certain difficulty.Because the mold cased circuit breaker leading-out terminal descends two ends thereon, centre-to-centre spacing is very big, and as when closely the base pushes circuit breaker or extract out, two ends are stressed up and down differs greatly, and forms very big moment at the guide rail place, increases friction widely.Make high-quality pull-out type mold cased circuit breaker and must design a kind of new scheme, make it more reasonable, more economical.
Mechanical interlock mechanism is parts of protecting the person and device security in the drawout breaker, clearly stipulates in GB14048.2 " low voltage switchgear and control appliance low-voltage circuit breaker " standard:
The insulating contact of drawout breaker main circuit and the insulating contact of auxiliary circuit (as the words that are suitable for) should have the isolation distance that meets the isolation features requirement when the isolated location, but need to consider manufacturing tolerance and because the change in size that wearing and tearing cause.
Draw-out mechanism should be installed a reliable indicating device, and this device should be able to be indicated the position of insulating contact clearly.Drawing mechanism also should be equipped with to have only and just allow insulating contact to separate after the main contact of circuit breaker disconnects or closed again interlock.
In addition, drawing mechanism should be installed the interlock that only just allows the main contact closure under following situation:
-when insulating contact is closed fully, or
-when between the sound part (isolated location) of insulating contact, having obtained the isolation distance of regulation.
When drawout breaker is in the separation point position, must guarantee that the isolation distance of defined between the insulating contact can not reduce owing to accidental cause.
Three, summary of the invention
The objective of the invention is on the basis of existing mold cased circuit breaker, the rational withdrawing device of project organization, a kind of withdrawing device of big electric current mold cased circuit breaker band mechanical interlocking is provided, it meets GB14048.2 " low voltage switchgear and control appliance low-voltage circuit breaker " standard-required, guarantees the breaker safe action.
For achieving the above object, the solution that the present invention takes is: a kind of withdrawing device of big electric current mold cased circuit breaker band mechanical interlocking, one housing bottom is installed a screw rod, this screw rod cooperates with the slide plate of a band nut, tooth bar on this slide plate and the engagement of a pair of sector gear, a pair of sector gear lays respectively at housing both sides inwall, and a connecting rod one end is connected with sector gear, the other end is connected with the cam that is positioned at the mechanism center; The outer of one sector gear cooperates with a linking lever, holds with spring under this linking lever, and the spring other end is fixed in housing, and the roller on the linking lever has an A plane near the outer of sector gear on this linking lever; Also be fixed with the double flute guide rail on the inwall of housing both sides.
Described cam has interior along groove.
The present invention can be supporting with big electric current mold cased circuit breaker body, makes the big electric current mold cased circuit breaker of pull-out type, and it compared with prior art has following characteristics:
1, general omnipotent breaker pull-out type structure makes the slide plate slides of band nut with rotating screw bolt, tooth bar on the slide plate rotates a pair of sector gear, with the co-axially fixed pair of cams of sector gear along with rotation, breaker body is pushed or extracts out, because contact is subjected to force unbalance, the inapplicable mold cased circuit breaker of this scheme up and down.And invention makes the slide plate slides of band nut equally with rotating screw bolt, tooth plate on the slide plate rotates a pair of sector gear, difference is to drive the cam rotation that is positioned at the mechanism center through connecting rod with sector gear, during the device breaker body, breaker body is pushed or extracts out by the roller on the body.Because the roller on the breaker body that cam promotes is positioned at the center of insulating contact up and down, thereby pushes and extract out laborsaving and reliable.And this feature is very necessary to the bigger mold cased circuit breaker of insulating contact distance up and down.
2, the present invention has saved the quite complicated interlocking device of omnipotent breaker, only promptly finish the function of the requirement of interlocking with the cooperation of the outer of cam and a linking lever, replace the combination of two groups of functors with one group of functor, not only simply but also reliable, its operating principle is as follows: when draw-out mechanism is in the separation point position, roller on the linking lever relies on the outer of the pulling force of spring near sector gear, make the A plane maintenance level on the linking lever, and the locking part of breaker body upwards pushed away, withstand the draw bar of breaker body inside by locking part, make breaker body be in the trip free state, and can not go up button, be i.e. the circuit breaker connection of can not closing a floodgate.Under the drive of cam in mechanism when clockwise direction rotates, along the roller that promotes on the breaker body breaker body is pushed in it, because sector gear outer radius is constant, so the invariant position of linking lever, breaker body keeps the trip free state and the connection of can not closing a floodgate.When cam rotates to coupled position (the complete closure of insulating contact puts in place), the outer radius of roller on the linking lever and sector gear contact position diminishes, under the effect of spring force, linking lever rotates to clockwise direction, locking part is replied free state thereupon, draw bar also returns to free state, the breaker body operation of can closing a floodgate.When breaker body was extracted out, cam was rotated counterclockwise, because cam outer radius becomes big, A plane Reversion Level state under the locking part, through the effect of locking part and draw bar, breaker body is threaded off, the interlocking effect is separated into safe distance (being the separation point position) fully until insulating contact.The extraction of circuit breaker insulating contact is because the interior clearance plane along groove of cam lags behind the interlocking action, to guarantee safety.
3, general draw-out mechanism all has the pair of right and left guide rail, play the guiding role when pushing and extract out.The present invention has designed the two guide rails of double flute and has pushed structure, can be directly each side two rollers on the breaker body be put into the double flute guide rail of draw-out mechanism, then circuit breaker is pushed or extracts out, economized the pre-introducing mechanism of general draw-out mechanism, reliable simply again.
Four, description of drawings
Fig. 1 is the supporting sketch of present embodiment and breaker body.
Fig. 2 is transmission and interlocking device's sketch (punishment is offed normal and put) in the present embodiment.
Fig. 3 is transmission and interlocking device's sketch (locating coupled position) in the present embodiment.
Fig. 4 is double flute guide rail structure figure (punishment is offed normal and put) in the present embodiment.
Fig. 5 is double flute guide rail structure figure (locating coupled position) in the present embodiment.
Among the figure: double dot dash line is a breaker body; 1, double flute guide rail, 2, the roller on the breaker body, 3, cam, 4, the locking part on the breaker body, 5, linking lever, 6, the roller on the linking lever, 7, spring, 8, screw rod, 9, sector gear, 10, nut, 11, slide plate, 12, connecting rod, 13, breaker body, 14, housing.
Five, embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is remake description.
Referring to Fig. 1-Fig. 5, a kind of withdrawing device of big electric current mold cased circuit breaker band mechanical interlocking, a screw rod 8 is installed in one housing, 14 bottoms, this screw rod 8 cooperates with the slide plate 11 of a band nut 10, tooth bar on this slide plate 11 and 9 engagements of a pair of sector gear, a pair of sector gear 9 lays respectively at housing 14 both sides inwalls, and a connecting rod 12 1 ends are connected with sector gear 9, the other end is connected with the cam 3 that is positioned at the mechanism center; The outer of one sector gear 9 cooperates with a linking lever 5, and this linking lever 5 times is held with spring 7, and spring 7 other ends are fixed in housing 14, and the roller 6 on the linking lever has an A plane near the outer of sector gear 9 on this linking lever 6; Also be fixed with double flute guide rail 1 on the housing 14 both sides inwalls.
Referring to Fig. 1-Fig. 3, described cam 3 has interior along groove.
Present embodiment is fit to 1250A mold cased circuit breaker body supporting, and the big electric current of the pull-out type of making (1250A) mold cased circuit breaker fills the domestic gaps.
Claims (2)
1, a kind of withdrawing device of big electric current mold cased circuit breaker band mechanical interlocking, a screw rod (8) is installed in one housing (14) bottom, this screw rod (8) cooperates with the slide plate (11) of a band nut (10), it is characterized in that: tooth bar on this slide plate (11) and a pair of sector gear (9) engagement, a pair of sector gear (9) lays respectively at housing (14) both sides inwall, and a connecting rod (12) one ends are connected with sector gear (9), the other end is connected with the cam that is positioned at the mechanism center (3); The outer of one sector gear (9) cooperates with a linking lever (5), this linking lever (5) is held with spring (7) down, spring (7) other end is fixed in housing (14), and the roller on the linking lever (6) has an A plane near the outer of sector gear (9) on this linking lever (6); Also be fixed with double flute guide rail (1) on the inwall of housing (14) both sides.
2, the withdrawing device of a kind of big electric current mold cased circuit breaker band mechanical interlocking according to claim 1 is characterized in that: described cam (3) has interior along groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144098 CN1577685A (en) | 2003-07-29 | 2003-07-29 | Withdrawing device with mechanical interlock for Large current plastic casing type circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03144098 CN1577685A (en) | 2003-07-29 | 2003-07-29 | Withdrawing device with mechanical interlock for Large current plastic casing type circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1577685A true CN1577685A (en) | 2005-02-09 |
Family
ID=34579588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03144098 Pending CN1577685A (en) | 2003-07-29 | 2003-07-29 | Withdrawing device with mechanical interlock for Large current plastic casing type circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1577685A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562314A (en) * | 2008-04-15 | 2009-10-21 | 通用电气公司 | Racking mechanism for a circuit breaker |
| CN109427493A (en) * | 2017-08-31 | 2019-03-05 | 施耐德电器工业公司 | Force brake separating mechanism and switchgear |
-
2003
- 2003-07-29 CN CN 03144098 patent/CN1577685A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562314A (en) * | 2008-04-15 | 2009-10-21 | 通用电气公司 | Racking mechanism for a circuit breaker |
| CN109427493A (en) * | 2017-08-31 | 2019-03-05 | 施耐德电器工业公司 | Force brake separating mechanism and switchgear |
| CN109427493B (en) * | 2017-08-31 | 2020-02-14 | 施耐德电器工业公司 | Forced opening mechanism and switch cabinet |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |