CN2681314Y - An electrical contact for primary cut-out - Google Patents
An electrical contact for primary cut-out Download PDFInfo
- Publication number
- CN2681314Y CN2681314Y CN 200420020867 CN200420020867U CN2681314Y CN 2681314 Y CN2681314 Y CN 2681314Y CN 200420020867 CN200420020867 CN 200420020867 CN 200420020867 U CN200420020867 U CN 200420020867U CN 2681314 Y CN2681314 Y CN 2681314Y
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- Prior art keywords
- contact blade
- coil
- current coil
- contact
- current
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to an electrical contact for a primary cut-out, comprising an electricity conducting bar, a current coil and a contact blade. The current coil is provided between the electricity conducting bar and the contact blade. The electricity, the current coil and the contact blade are in sequence connected in series. The current coil adopts a whole-run coils and is an annular structure. Two connecting terminals which are concentric and independent with each other are arranged on the center of both ends of the coil. Wherein the front connecting terminal is fixedly connected with the center of the contact blade. The rear connecting terminal is fixedly connected with the electricity conducting bar. The current coil generates the longitudinal magnetic field which is distributed uniformly. The electric field of the contact blade is concentrated and achieves the purposes of making the electric arc concentrated and stable. The utility model makes the metallic material of the contact blade evaporate and divert uniformly, extends the service life of the contact blade and namely extends the service life of the whole electrical contact for a primary cut-out.
Description
Affiliated technical field
The utility model relates to power switch, the electrical contact in particularly a kind of primary cut-out.
Background technology
In electric power system, the switch of high-tension circuit need be realized by primary cut-out.Owing to be that high voltage, big electric current are carried out the open and close action, therefore require the electrical contact in the primary cut-out that good are-tight property is arranged.The present electrical contact that uses, the disc contact is arranged, forms such as blowout coil contact, wherein the disc contact is that contact material is made whole disc shape, has characteristic of simple structure, but because the uncontrollable electric arc of this structure is in the motion of contact surface, when contact is worked, the faint scaling loss on its surface and the rough fusing spot that causes can cause the concentration of local of electric field, making electric arc form aggravation at this place concentrates, further scaling loss contact, cause the shortening in contact life-span, thereby only be suitable for the control of little electric current, as the control of 10KA current class.In the primary cut-out of big current class, as the above current class of 100KA, what adopt at present is the blowout coil contact, this contact is by contact blade, current coil, conducting rod is formed, back at contact blade is provided with current coil, current coil is one has a link at its home position, the strip electric conductor is arranged on radial direction and the circumference, the strip electric conductor has four or two, every is respectively 1/4 coil or 1/2 coil, contact blade is opened the anti-vortex groove of system along its radial direction, makes the multi-petal shape shape, and the end of every 1/4 coil or 1/2 coil is fixedlyed connected with the back side of each lobe of contact blade respectively, the link of current coil home position is fixedlyed connected with conducting rod, on circuit, conducting rod, current coil, contact blade is to be connected in series in order, and every 1/4 coil or 1/2 coil are to be connected in parallel.During work, conducting rod is connected with external circuit, and electric current flows to contact blade through conducting rod, current coil.Produce magnetic field by electric current, the direction in this magnetic field is the longitudinal direction of contact, and is promptly consistent with the electric arc direction.When circuit breaker moves in open and close, on contact blade, produce electric arc, electric arc is made up of many arc lines, the transverse magnetic field that each bar arc line is produced separately makes it mutually exclusive, cause electric arc to move the random of contact blade surface, but after vertical formation longitudinal magnetic field of contact, the mobile meeting of arc line is subjected to the electromagnetic force effect of this longitudinal magnetic field, move it and be inhibited, thereby electric arc is concentrated, evaporation of metal, transfer phenomena that electric arc is produced evenly take place, and have prolonged the useful life of contact blade.But 1/4 or 1/2 present loop construction is the peripheral position that is in contact blade because the end of coil is the end of strip electric conductor, and non-central location, thereby distribution of current density is peripheral intensive on contact blade, central distribution is few.In addition, because coil is made up of pintongs or two lobes, the magnetic field of its generation also is corresponding four or two distributions, is uneven distribution on contact blade.Therefore, cause electric field on the contact blade, DISTRIBUTION OF MAGNETIC FIELD inequality, electric arc is dispersed in the peripheral position of contact blade, and arc line is multicomponent cloth, be subject to mutual transverse magnetic field effect and produce repulsion, make electric arc produce unsettled moving, the evaporation of contact blade metal material, transfer that electric arc caused are inhomogeneous, cause shorten the useful life of contact blade.
Summary of the invention
The utility model purpose is to provide electric field on a kind of contact blade, the uniform primary cut-out electrical contact of Distribution of Magnetic Field, the electric arc that produces when making its work is even, concentrated to distribute, thereby the evaporation of contact blade metal material, transfer that electric arc is caused are even, prolong the useful life of contact blade, promptly prolong the useful life of primary cut-out electrical contact.
Scheme of the present utility model is: the primary cut-out electrical contact, comprise conducting rod, current coil, contact blade, current coil is arranged between conducting rod and the contact blade, conducting rod, current coil, contact blade are connected in series in order, current coil adopts whole circle coil, is loop configuration, and respectively there are two concentric, links independently mutually at the two ends of this coil at its home position, preceding link wherein is connected with the center fixation of contact blade, and back link is fixedlyed connected with conducting rod; Wherein current coil is formed by stacking by two of front and back, is connected in parallel by conductive plate between two of the front and back, and the center of circle part of current coil anter is made preceding link, and the center of circle part of current coil rear panel is made the back link, forms whole circle coil; Rear positions at current coil on the conducting rod is provided with grading ring, and grading ring is a circular metal dish, its diameter and contact equal diameters.
The utility model has the advantages that: owing to be to adopt whole circle coil, thereby the Distribution of Magnetic Field that produces is even, preceding link owing to current coil is connected with the center fixation of contact blade again, make the electric field on the contact blade concentrate on its center, add the effect of grading ring, reach the purpose that makes electric arc concentrated, stable, the evaporation of contact blade metal material, transfer that electric arc is caused evenly take place, prolong the useful life of contact blade, promptly prolonged the useful life of whole primary cut-out electrical contact.
Description of drawings
The utility model is described in further detail with embodiment with reference to the accompanying drawings below.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the cutaway view of A-A direction among Fig. 1.
Fig. 3 is the cutaway view of B-B direction among Fig. 1.
Fig. 4 is the cutaway view of C-C direction among Fig. 1.
1 contact blade among the figure, 2 contact blade backing plates, 3 current coils, 4 coil backing plates, 5 grading rings, 6 conducting rods, 7 conductive plates, 8 coil support, 9 strengthen pillar.Wherein 1-1 is an anti-vortex groove on the contact blade among Fig. 2; 3-1 is the current coil anter among Fig. 3, and 3-2 is the preceding link of current coil; 3-3 is the current coil rear panel among Fig. 4, and 3-4 is the back link of current coil.
Embodiment
As shown in Figure 1, the utility model comprises conducting rod 6, current coil 3, contact blade 1, current coil 3 is arranged between conducting rod 6 and the contact blade 1, conducting rod 6, current coil 3, contact blade 1 are connected in series in order, current coil 3 adopts whole circle coil, is loop configuration, and respectively there are two concentric, links independently mutually at the two ends of this coil at its home position, preceding link wherein is connected with the center fixation of contact blade 1, and back link is fixedlyed connected with conducting rod 6.
In order to increase the mechanical strength of contact blade 1, at its back side contact blade backing plate 2 is set, in order to increase the mechanical strength of current coil 3, coil backing plate 4 is set in its back.
Current coil is formed by stacking by two of front and back, is connected in parallel by conductive plate 7 between two of the front and back, and two centre is supported by coil support 8, and peripheral annular partly supports by strengthening pillar 9, to guarantee the mechanical strength of whole electrical contact.
Wherein, contact blade backing plate 2, coil backing plate 4, coil support 8 are strengthened pillar 9 and are all used the stainless steel material of comparing poorly conductive with copper product to make, to guarantee the current direction between conducting rod 6, current coil 3, the contact blade 1.
Rear positions at current coil 3 on conducting rod 6 is provided with grading ring 5, and grading ring 5 is circular metal dishes, its diameter and contact blade 1 equal diameters.So that the Electric Field Distribution on the whole electrical contact is even.
As shown in Figure 2, the anti-vortex groove 1-1 of the system of opening on the contact blade 1, the eddy current in order on the blocking-up contact blade 1 reduces the heating that it produces because of eddy current.
Current coil is formed by stacking by two of front and back, is connected in parallel by conductive plate 7 between two of the front and back, and as shown in Figure 3, the anter 3-1 of current coil is a loop configuration, and its center of circle part is made preceding link 3-2.Equally, as shown in Figure 4, the rear panel 3-3 of current coil also is a loop configuration, and the anter 3-1's of its annular section and current coil is identical, can overlap mutually, and its center of circle part is made back link 3-4.The anter 3-1 of current coil and the rear panel 3-3 of current coil are after installation, be connected in parallel by conductive plate 7 to each other, the position of its junction as shown in Fig. 3 and Fig. 4, and by illustrated direction overlapping, forming whole circle coil, promptly is the current coil 3 in the utility model.
With reference to Fig. 3, Fig. 4, and in conjunction with Fig. 1 analysis, during work, conducting rod 6 is connected with external circuit, electric current by conducting rod 6 through after the annular section of rear panel 3-3 of link 3-4, current coil to its terminal conductive plate 7, flow to the preceding link 3-2 of the anter 3-1 home position of current coil, arrive the center, the back side of contact blade 1 again.The end of the annular section of the anter 3-1 of current coil also is connected by conductive plate with the initiating terminal of the annular section of the rear panel 3-3 of current coil, when electric current when conducting rod flows into, the sense of current of the rear panel 3-3 of current coil anter 3-1 and current coil all is clockwise directions, direction is identical, because the rich ring rotation of electric current, therefore produce the magnetic field with the electrical contact axially parallel, i.e. a longitudinal magnetic field.
Because the annular section of current coil 3 is to be equivalent to whole circumference, therefore be whole circle coil, the longitudinal magnetic field of its generation is an equally distributed magnetic field.
Because the preceding link 3-2 of current coil is fixedlyed connected with the centre of contact blade 1, therefore the Electric Field Distribution on contact blade 1 surface is evenly to concentrate on its center, add the equipotentiality effect of power line of 5 pairs of electric fields of grading ring of current coil 3 back locations on the conducting rod 6, the Electric Field Distribution on contact blade 1 surface is evenly concentrated.
When making current or turn-off current, the surface of contact blade 1 produces electric arc, mutually exclusive between each arc line of electric arc because of its transverse magnetic field effect separately, form unsettled moving, this mobile meeting causes cutting and is subjected to the opposite direction power of longitudinal magnetic field to its generation the magnetic line of force of longitudinal magnetic field, therefore be suppressed, make arc line stable, concentrated.
The Electric Field Distribution on contact blade 1 surface is evenly concentrated, and adds uniform longitudinal magnetic field effect, makes electric arc evenly, stably concentrate on the centre of contact blade 1, and the life-span of contact blade 1 is prolonged, and has promptly prolonged the useful life of whole primary cut-out electrical contact.
Claims (3)
1. primary cut-out electrical contact, comprise conducting rod (6), current coil (3), contact blade (1), current coil (3) is arranged between conducting rod (6) and the contact blade (1), conducting rod (6), current coil (3), contact blade (1) is connected in series in order, it is characterized in that: current coil (3) adopts whole circle coil, be loop configuration, the two ends of this coil its home position respectively have two concentric, link independently mutually, preceding link (3-3) wherein is connected with the center fixation of contact blade (1), and back link (3-4) is fixedlyed connected with conducting rod (6).
2. a kind of primary cut-out electrical contact as claimed in claim 1, it is characterized in that: current coil (3) is formed by stacking by two of front and back, before and after be connected in parallel by conductive plate (7) between two, the center of circle part of current coil anter (3-1) is made preceding link (3-3), the center of circle part of current coil rear panel (3-2) is made back link (3-4), forms whole circle coil.
3. a kind of primary cut-out electrical contact as claimed in claim 1 is characterized in that: the rear positions that conducting rod (6) is gone up at current coil (3) is provided with disc metal grading ring (5), grading ring (5) diameter and contact blade (1) equal diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420020867 CN2681314Y (en) | 2004-03-01 | 2004-03-01 | An electrical contact for primary cut-out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420020867 CN2681314Y (en) | 2004-03-01 | 2004-03-01 | An electrical contact for primary cut-out |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2681314Y true CN2681314Y (en) | 2005-02-23 |
Family
ID=34606798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420020867 Expired - Fee Related CN2681314Y (en) | 2004-03-01 | 2004-03-01 | An electrical contact for primary cut-out |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2681314Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397538C (en) * | 2005-03-28 | 2008-06-25 | 温岭市紫光电器有限公司 | Double turn type longitudinal magnetic field contact for vacuum arc extinguishing chamber |
| CN112509856A (en) * | 2020-09-25 | 2021-03-16 | 平高集团有限公司 | Contact coil for generating arc extinguishing magnetic field and vacuum arc extinguishing chamber contact structure |
-
2004
- 2004-03-01 CN CN 200420020867 patent/CN2681314Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397538C (en) * | 2005-03-28 | 2008-06-25 | 温岭市紫光电器有限公司 | Double turn type longitudinal magnetic field contact for vacuum arc extinguishing chamber |
| CN112509856A (en) * | 2020-09-25 | 2021-03-16 | 平高集团有限公司 | Contact coil for generating arc extinguishing magnetic field and vacuum arc extinguishing chamber contact structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHEJIANG ZIGUANG ELECTRICAL CO., LTD. Assignor: Zhou Heming Contract fulfillment period: 2008.4.30 to 2018.4.29 Contract record no.: 2009330001094 Denomination of utility model: An electrical contact for primary cut-out Granted publication date: 20050223 License type: Exclusive license Record date: 20090520 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.30 TO 2018.4.29; CHANGE OF CONTRACT Name of requester: ZHEJIANG ZIGUANG ELECTRICAL CO.,LTD. Effective date: 20090520 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050223 Termination date: 20130301 |