CN2344860Y - Grid chip arc-estinguishing chamber with V shape end - Google Patents
Grid chip arc-estinguishing chamber with V shape end Download PDFInfo
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- CN2344860Y CN2344860Y CN 98232837 CN98232837U CN2344860Y CN 2344860 Y CN2344860 Y CN 2344860Y CN 98232837 CN98232837 CN 98232837 CN 98232837 U CN98232837 U CN 98232837U CN 2344860 Y CN2344860 Y CN 2344860Y
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Abstract
The utility model provides a direct-operated type novel grid chip arc-extinguishing chamber for alternating-current contact devices. Grid chips are vertically arranged, wherein, a piece of grid chip nearest an outer side is provided with a V-shaped end head which is protruded towards the area of a contact head. The direct-operated type novel grid chip arc-extinguishing chamber integrates the advantages of vertical and parallel arrangement of the grid chips. On one hand, the V-shaped end head improves the electric field distribution of the direct-operated type novel grid chip arc-extinguishing chamber, enhances the magnetic field of air arcs, and prompts the flow of airflow. On the other hand, electric arcs are in contact with the grid chips in advance. Thus, switching performance and the electrical service life of a contactor under the working condition of 660V AC-4 are raised substantially. By the experimental proof of a detecting center approved by China, after the alternating-current contactor of CJ 20-40A is replaced by the utility model, equal electric current can be switched on and off under the working condition of 660V AC-4.
Description
The utility model belongs to the low-voltage electrical apparatus field, has related to a kind of grating arc-extinguishing chamber that is used for the band V-arrangement termination of intermediate size (rated current is pacified to 80 peaces by 40) straight-style ac contactor.
Contactor is as the control apparatus of frequent operation, electric life is one of its most important performance index, wherein AC4 use classes condition of work is very harsh, because it requires frequent crawl squirrel-cage motor, promptly under rated voltage, connect and 6 times of rated current of disjunction, and the line power factor is lower, and existing both at home and abroad contactor all must reduce grade of rated current under 660 volts of this conditions of work uses.
The purpose of this utility model is the shortcoming that is to overcome above-mentioned prior art, a kind of grating arc-extinguishing chamber that is used for the band V-arrangement termination of A.C. contactor is proposed, adopt the A.C. contactor of this version, owing to increased substantially connecting-disconnecting function and electrical endurance, thereby under 660 volts of AC4 conditions of work, can wait electric current to use.
Improve 660 volts of electric life and connecting-disconnecting functions under the AC4 condition, can start with from two aspects, one is shortening electric arc dead time, and another is to reduce the arcing time.Electric arc dead time is the switching arc inherent feature, opens circuit and after producing electric arc, electric arc need be stagnated a period of time on contact when contact, treats that electric arc elongates certain-length and just can move, and runs to arc extinguishing grid pieces by running the arc road.Electric arc is called electric arc dead time during this period of time from producing to begin to run.Reduce electric arc and not only help reducing the scaling loss of electric arc dead time, and allow electric arc enter arc control device as early as possible, also help reducing the arcing time contact.Electric arc is relevant with several factors dead time, and wherein main is arc blow-out magnetic field, strengthens arc blow-out magnetic field, not only can effectively reduce electric arc dead time, and can improve the arc blow-out electric power, increases arc motion speed, helps arc extinction.The contrast that can extinguish medium recovery strength and voltage recovery process when being decided by the electric arc zero passage of A.C. contactor electric arc, the former is better than the latter, arc extinction, on the contrary then restrike.Medium recovery strength depends mainly on the arc control device performance.And voltage recovery process is decided by the Electric Field Distribution of arc control device on the other hand on the one hand by cut-offfing the intrinsic parameter decision of circuit, and the latter can obtain desirable Electric Field Distribution by the arc control device appropriate design.
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 is the structure principle chart of grid sheet of the present utility model (1), and wherein (a) is left view, (b) is front view.
Fig. 3 is the structure principle chart of grid sheet of the present utility model (2), and wherein (a) is left view, (b) is front view.
Fig. 4 is the comparison diagram of the utility model structure (figure d) and three kinds of prior art structures (figure a-c).
Fig. 5 is the medium recovery strength curve comparison diagram of the utility model structure and three kinds of prior art structures.
Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are elaborated.
With reference to Fig. 1,2,3, ferromagnetic grid sheet group of the present utility model is vertically to place; Grid sheet (1) and (2) by two kinds of different structures are formed, an outermost sheet grating sheet (1) has to the outstanding V-arrangement termination of dynamic and static contact (3), and a few sheet grating sheets in front (2) are owing to will avoid the V-arrangement termination, its size is shorter, the head of V-arrangement ledge is near dynamic and static contact (3), its following transverse plane is parallel with fixed contact conductive plate (7), and camber is done in the upper surface, so that striking.Whole arc control device are formed by grid sheet group, U-shaped striking sheet (4) with by the arc-extinguish chamber (5) that arc resistant plastic is made.There is air vent hole (6) side, arc-extinguish chamber two ends, and the outermost one sheet grating sheet (1) of band V-arrangement jag forms a gap with arc-extinguish chamber (5) inwall, and this gap and air vent hole (6) form a gas channel.
During use, after dynamic and static contact (3) disconnects, go up generation electric arc at dynamic and static contact (3), because the V-arrangement termination of the grid sheet (1) that magnetic conductor is made is very near from dynamic and static contact (3), strengthened the arc blow-out magnetic field of electric arc on the one hand, electric arc is drawn in the V-arrangement termination, the striking sheet has been played in the V-arrangement termination on the other hand, pilot arc enters top grid sheet (1), (2) fast, the V-arrangement termination of grid sheet (1) is equivalent to the grid sheet of the parallel placement of a slice, when electric arc enters the V-arrangement end portion, just be divided into two sections.The existence of V-arrangement termination has also improved the distribution of arc control device internal electric fields.
The arc control device of the band V-arrangement jag that the utility model proposes, because camber is done in the upper surface of V-arrangement ledge, and V-arrangement jag and contact are very close.So after electric arc produces, can enter the V-arrangement ledge soon, and under its guiding, enter the arc extinguishing grid pieces group rapidly, thereby the grid sheet of band V-arrangement jag, not only play the effect of grid sheet, and can also play the striking sheet.
The arc control device of the band V-arrangement jag that the utility model proposes, because the shape of V-arrangement jag and the locus in arc control device thereof, and the gas channel that venthole forms on the sidewall of its behind and arc control device and the arc-extinguish chamber, promote that all the arc extinguishing indoor air flow is unimpeded, help improving arc motion speed, guarantee that electric arc enters the arc extinguishing grid pieces group smoothly.
In order to estimate arc extinction performance of the present utility model, we compare the utility model (Fig. 4 (d)) and three kinds of prior art structures (Fig. 4 (a)-(c)), and for the first time four kinds of arc control device medium recovery strengths are as shown in Figure 5 after the zero passage to record electric current.Among Fig. 5, abscissa is the later time of current over-zero, and unit is microsecond (μ s), and ordinate is a medium recovery strength, and unit represents with voltage volt (V).Can be found out obviously that by curve among the figure grid sheet of parallel placement (structure of Fig. 4 (a)) medium recovery strength is minimum, this is because electric arc can not enter due to the grid sheet.Press Gassmann E.Point out at the paper that German Ilmenau delivers: before electric arc is entering the grid sheet, its arc column must have enough voltage drops with guarantee after entering the grid sheet, to provide be divided into short arc after the summation of required interpolar pressure drop, the structure of accompanying drawing 4 (a) is because grid sheet group is too near apart from contact, arc motion can not be set up required arc voltage to grid sheet fashion, thereby can't enter the grid sheet.Structure (b) though the grid sheet also be parallel placement, the grid sheet is far away apart from contact, thereby arc energy enters the grid sheet reluctantly, but because the grid leaf length is too short, electric arc is easily run out of grid sheet rear end and produced short circuit, thereby medium recovery strength is not high yet.Structure (c) is vertically to place the grid sheet, and electric arc will enter the grid sheet through one section athleticism, thereby electric arc can set up enough pressure drops before entering the grid sheet, and structure (d) is as the top advantage of introducing, and its medium recovery strength is the highest.
In order to examine novel arc control device of the present utility model, with CJ20-40A is object, two kinds of contactor model machines that arc control device are respectively structure c and structure d in the accompanying drawing 4 have been made, the Great Wall electrical apparatus test research institute that entrusts authorized by state is by the specification requirement of the company standard JB/DQ4172-86 of Ministry of Machine-Building Industry to the CJ20 Series AC Contactor, carry out 660 volts of contrast tests under the AC4 condition of work, its result such as table 1.
The contrast of table 1 The prototype test results
| Contrast | Specification requirement | Result of the test | ||
| CJ20-40 | CJ20-63 | Structure c | Structure d | |
| Rated operational voltage (V) | 660 | 660 | 660 | 660 |
| Rated operational current (A) AC4 | 25 | 40 | 40 | 40 |
| Electric life (ten thousand times) | 4 | 1 | 0.96 | ＞2 |
| Frequency of operation (inferior/hour) | 120 | 120 | 120 | 120 |
Found out by result of the test: structure c fails to satisfy the condition of CJ20-63A electric life under 660 volts of AC4 conditions of work, and structure d of the present utility model not only successfully makes CJ20-40A improve a current class, and abundant nargin is arranged.
Claims (2)
1. be with the grating arc-extinguishing chamber of V-arrangement termination, comprise an arc-extinguish chamber (5), dispose dynamic and static contact (3) in the arc-extinguish chamber (5), dispose U type striking sheet (4) above the dynamic and static contact (3), feature of the present utility model is, disposes grid sheet (1), (2) of two kinds of different structures in the arc-extinguish chamber (5), and outermost a slice (1) has the V-arrangement termination of locating to give prominence to dynamic and static contact (3), the following transverse plane of V-arrangement termination is parallel with fixed contact conductive plate (7), and camber is done in its upper surface.
2. grating arc-extinguishing chamber according to claim 1 is characterized in that, there is air vent hole (6) arc-extinguish chamber (5) side, two ends, and said grid sheet (1) forms a gap with arc-extinguish chamber (5) inwall, and this gap and air vent hole (6) form a gas channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98232837 CN2344860Y (en) | 1998-07-01 | 1998-07-01 | Grid chip arc-estinguishing chamber with V shape end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98232837 CN2344860Y (en) | 1998-07-01 | 1998-07-01 | Grid chip arc-estinguishing chamber with V shape end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2344860Y true CN2344860Y (en) | 1999-10-20 |
Family
ID=33981686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98232837 Expired - Fee Related CN2344860Y (en) | 1998-07-01 | 1998-07-01 | Grid chip arc-estinguishing chamber with V shape end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2344860Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908450A (en) * | 2010-07-20 | 2010-12-08 | 中国船舶重工集团公司第七一二研究所 | Direct current quick breaker |
| CN101217076B (en) * | 2007-12-30 | 2011-01-19 | 人民电器集团有限公司 | AC contactor arc control device |
| CN102194586A (en) * | 2011-05-12 | 2011-09-21 | 苏州市诺弗电器有限公司 | Arcing shield for power switch |
| CN101689433B (en) * | 2007-06-29 | 2012-09-05 | 施耐德电器工业公司 | Electrical cut-off device having a complementary electrical function |
| CN106783445A (en) * | 2016-12-12 | 2017-05-31 | 金平娣 | A kind of air flow partition formula arc-extinguishing mechanism of power circuit breaker |
| CN109559946A (en) * | 2017-09-27 | 2019-04-02 | 常熟开关制造有限公司(原常熟开关厂） | A kind of breaker |
-
1998
- 1998-07-01 CN CN 98232837 patent/CN2344860Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101689433B (en) * | 2007-06-29 | 2012-09-05 | 施耐德电器工业公司 | Electrical cut-off device having a complementary electrical function |
| CN101217076B (en) * | 2007-12-30 | 2011-01-19 | 人民电器集团有限公司 | AC contactor arc control device |
| CN101908450A (en) * | 2010-07-20 | 2010-12-08 | 中国船舶重工集团公司第七一二研究所 | Direct current quick breaker |
| CN101908450B (en) * | 2010-07-20 | 2012-07-18 | 中国船舶重工集团公司第七一二研究所 | Direct current quick breaker |
| CN102194586A (en) * | 2011-05-12 | 2011-09-21 | 苏州市诺弗电器有限公司 | Arcing shield for power switch |
| CN106783445A (en) * | 2016-12-12 | 2017-05-31 | 金平娣 | A kind of air flow partition formula arc-extinguishing mechanism of power circuit breaker |
| CN109559946A (en) * | 2017-09-27 | 2019-04-02 | 常熟开关制造有限公司(原常熟开关厂） | A kind of breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |