CN201820643U - High voltage knife switch - Google Patents
High voltage knife switch Download PDFInfo
- Publication number
- CN201820643U CN201820643U CN2010205336374U CN201020533637U CN201820643U CN 201820643 U CN201820643 U CN 201820643U CN 2010205336374 U CN2010205336374 U CN 2010205336374U CN 201020533637 U CN201020533637 U CN 201020533637U CN 201820643 U CN201820643 U CN 201820643U
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- contact
- knife
- standing screw
- moving contact
- knife switch
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- Expired - Fee Related
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Abstract
The utility model discloses a high voltage knife switch which comprises a knife-like moving contact, a fixed contact and a base, wherein the cross section of the fixed contact is mountain-like; the cross section of the cutter type moving contact is II-shaped; eddy current clamping pieces made of an electric conduction material are fixedly installed at two outer sides of the knife type moving contact; when the high voltage knife switch is closed, and current flows through the knife type moving contact, a current magnetic field forms eddy current respectively in the eddy current clamping pieces; the magnetic force between the eddy magnetic fields are attracted mutually, thus an inward pressure is applied to the knife type moving contact by the eddy current clamping pieces at two sides, therefore the contact pressure between the knife type moving contact and the fixed contact is increased greatly, current capacity is improved; when the power is off, the clamping force disappears as the disappearance of the eddy current, at that time, the high voltage knife switch is disconnected, the friction force between the contacts is reduced, and the abrasion is lowered, thus the high voltage knife switch has long service life and steady current capacity, and can be applicable to the application requirements of the current of higher degrees.
Description
Technical field
The utility model relates to mesohigh electrical equipment current interruption test equipment, is specifically related to a kind of high pressure knife switch.
Background technology
For improving and guarantee the reliability of strong intelligent grid, need to use the high pressure knife switch, being used for mesohigh electrical equipment current interruption test detects, existing high pressure knife switch comprises the knife-edge moving contact, fixed contact and base, the cross section of fixed contact is a chevron, the cross section of described knife-edge moving contact is an II shape, having four faces between its fixed contact and the knife-edge moving contact contacts, rely on the deformation-recovery power of contact to clamp mutually between the two, this clamping force has certain limitation, and in use, because the characteristic and the wearing and tearing of metal itself, deformation-recovery power can diminish gradually, these factors all will be that the current capacity of high pressure knife switch diminishes, shortened the useful life of high pressure knife switch, the current capacity constant volume of existing high pressure knife switch between the 50KA, can't adapt to the application demand of higher current class at 25KA in addition.
The utility model content
For addressing the above problem, the purpose of this utility model is to provide a kind of long service life, and current capacity is stable, and can adapt to the high pressure knife switch of the application demand of higher current class.
For achieving the above object, the technical solution of the utility model is: a kind of high pressure knife switch, comprise knife-edge moving contact, fixed contact and base, the cross section of described fixed contact is a chevron, the cross section of described knife-edge moving contact is an II shape, and two outsides of described knife-edge moving contact all are installed with the eddy current clamping plate of conductive material.
Preferably, described fixed contact comprises clamp contact and the substrate that is fixedly connected on the base, described clamp contact be movably installed on the described substrate with described knife-edge moving contact corresponding surface on, described clamp contact comprises contact, for the pressure apparatus and the fixture of contact pressure are provided between knife-edge moving contact and the fixed contact.
Preferably, described pressure apparatus comprises spring, is provided with blind hole or the projection that is used to install described spring with the substrate correspondence position on the described contact.
Preferably, described pressure apparatus is a reed, described fixture is a standing screw, described contact is provided with the screw with described standing screw coupling, the position corresponding with described screw is provided with the through hole that mates with standing screw on the described substrate, described reed is provided with a through hole that mates with described standing screw, and is sheathed on the described standing screw, and between described contact and described substrate.
Preferably, described pressure apparatus is a reed, described fixture is the standing screw that is fixedly connected on the described contact, the position corresponding with described standing screw is provided with the through hole that mates with standing screw on the described substrate, described reed is provided with a through hole that mates with described standing screw, and be sheathed on the described standing screw, and between described contact and described substrate.
Preferably, described fixture is a standing screw, and described contact is provided with the screw with described standing screw coupling, and the position corresponding with described screw is provided with the through hole that mates with standing screw on the described substrate.
Preferably, described pressure apparatus is a reed, and described fixture is the standing screw that is fixedly connected on the described contact, and the position corresponding with described standing screw is provided with the through hole that mates with standing screw on the described substrate.
Preferably, described contact is at least two, and with the pressure apparatus and the fixture of described contact quantity Matching.
Preferably, the one side that contacts with described knife-edge moving contact of described contact is provided with two boss.
Adopt the beneficial effect of the technical program to be: the eddy current clamping plate that all is installed with conductive material in two outsides of knife-edge moving contact, after high pressure knife switch closure, when having electric current to flow through the knife-edge moving contact, this current field can form eddy current respectively in the eddy current clamping plate, magnetic force between this eddy current magnetism attracts each other, thereby make the eddy current clamping plate of both sides apply an inside pressure to the knife-edge moving contact jointly, thereby the contact pressure between knife-edge moving contact and the fixed contact is increased greatly, improved current capacity, after having a power failure, this clamping force disappears with the disappearance of eddy current, and disconnect the high pressure knife switch this moment, and the frictional force between the contact reduces, wearing and tearing have been reduced, so long service life, current capacity is stable, and can adapt to the application demand of higher current class.
Description of drawings
Fig. 1 and Fig. 2 are the schematic diagrames of a kind of high pressure knife switch of the utility model embodiment 1;
Fig. 3 is the schematic diagram of a kind of high pressure knife switch of the utility model embodiment 2.
Numeral and the represented corresponding component title of letter among the figure:
1. base 2. knife-edge moving contacts 31. contacts 32. springs 33. standing screws 34. substrates 35. reeds 36. blind holes 37. through holes 38. screws 4. eddy current clamping plates
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment 1,
As depicted in figs. 1 and 2, a kind of high pressure knife switch comprises knife-edge moving contact 2, fixed contact and base 1, and the cross section of fixed contact is a chevron, the cross section of knife-edge moving contact 2 is an II shape, and two outsides of knife-edge moving contact 2 all are installed with the eddy current clamping plate 4 of conductive material.
After high pressure knife switch closure, when having electric current to flow through knife-edge moving contact 2, this current field can form eddy current respectively in eddy current clamping plate 4, magnetic force between this eddy current magnetism attracts each other, thereby make the eddy current clamping plate 4 of both sides apply an inside pressure to knife-edge moving contact 2 jointly, thereby the contact pressure between knife-edge moving contact 2 and the fixed contact is increased greatly, improved current capacity, after having a power failure, this clamping force disappears with the disappearance of eddy current, disconnect the high pressure knife switch this moment, frictional force between the contact reduces, and has reduced wearing and tearing, so long service life, current capacity is stable, and can adapt to the application demand of higher current class.
Fixed contact comprises clamp contact and the substrate 34 that is fixedly connected on the base, clamp contact be movably installed on the substrate 34 with knife-edge moving contact 2 corresponding surfaces on, clamp contact comprises contact 31, for the pressure apparatus and the fixture of contact pressure are provided between knife-edge moving contact 2 and the fixed contact.
Pressure apparatus comprises spring 32, is provided with the blind hole 36 that is used to install spring 32 with substrate 34 correspondence positions on the contact 31.
Fixture is a standing screw 33, and contact 31 is provided with the screw 38 with standing screw 33 couplings, and the position corresponding with screw is provided with the through hole 37 that mates with standing screw 33 on the substrate 34.
In the present embodiment, see shown in Figure 1, contact 31 is total up to 12, be divided into two groups, be installed on the inboard of both sides substrate 34 respectively, when knife-edge moving contact 2 closures, knife-edge moving contact 2 extruding contacts 31, contact 31 compression springs 32 are after the high pressure knife switch closure, contact pressure between knife-edge moving contact 2 and the contact 31 is provided by spring 32, this constant pressure and stable, the one side that contact 31 contacts with knife-edge moving contact 2 is provided with two boss, as the contact-making surface between contact 31 and the knife-edge moving contact 2, this structure can improve effective contact area, increases the actual current handling capacity.
After abovementioned technology, the high pressure knife switch can be broken through the current limitation of 50KA, reaches 100KA, can satisfy the needs of special occasions.
See shown in Figure 3ly, all the other are identical with embodiment 1, and difference is that spring 32 is replaced by reed 35, and reed 35 is provided with a through hole that mates with standing screw 33, and is sheathed on the standing screw 33, and between contact 31 and substrate 34.
In the foregoing description, contact 31 can be two or 4 or 8 etc., decides as required.
Adopt the beneficial effect of the technical program to be: the eddy current clamping plate 4 that all is installed with conductive material in two outsides of knife-edge moving contact 2, after high pressure knife switch closure, when having electric current to flow through knife-edge moving contact 2, this current field can form eddy current respectively in eddy current clamping plate 4, magnetic force between this eddy current magnetism attracts each other, thereby make the eddy current clamping plate 4 of both sides apply an inside pressure to knife-edge moving contact 2 jointly, thereby the contact pressure between knife-edge moving contact 2 and the fixed contact is increased greatly, improved current capacity, after having a power failure, this clamping force disappears with the disappearance of eddy current, and disconnect the high pressure knife switch this moment, and the frictional force between the contact reduces, wearing and tearing have been reduced, so long service life, current capacity is stable, and can adapt to the application demand of higher current class.
In addition, pressure apparatus is for providing constant compression force between fixed contact and the knife-edge moving contact 2, and not distortion of fixed contact, so long service life, and current capacity is stable, has further improved the current capacity of high pressure knife switch.
Above-described only is preferred implementation of the present utility model; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model creation design; can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (9)
1. high pressure knife switch, comprise knife-edge moving contact, fixed contact and base, the cross section of described fixed contact is a chevron, and the cross section of described knife-edge moving contact is an II shape, it is characterized in that two outsides of described knife-edge moving contact all are installed with the eddy current clamping plate of conductive material.
2. high pressure knife switch as claimed in claim 1, it is characterized in that, described fixed contact comprises clamp contact and the substrate that is fixedly connected on the base, described clamp contact be movably installed on the described substrate with described knife-edge moving contact corresponding surface on, described clamp contact comprises contact, for the pressure apparatus and the fixture of contact pressure are provided between knife-edge moving contact and the fixed contact.
3. high pressure knife switch as claimed in claim 2 is characterized in that described pressure apparatus comprises spring, is provided with blind hole or the projection that is used to install described spring with the substrate correspondence position on the described contact.
4. high pressure knife switch as claimed in claim 2, it is characterized in that, described pressure apparatus is a reed, described fixture is a standing screw, described contact is provided with the screw with described standing screw coupling, and the position corresponding with described screw is provided with the through hole that mates with standing screw on the described substrate, and described reed is provided with a through hole that mates with described standing screw, and be sheathed on the described standing screw, and between described contact and described substrate.
5. high pressure knife switch as claimed in claim 2, it is characterized in that, described pressure apparatus is a reed, described fixture is the standing screw that is fixedly connected on the described contact, the position corresponding with described standing screw is provided with the through hole that mates with standing screw on the described substrate, described reed is provided with a through hole that mates with described standing screw, and is sheathed on the described standing screw, and between described contact and described substrate.
6. high pressure knife switch as claimed in claim 3, it is characterized in that, described fixture is a standing screw, and described contact is provided with the screw with described standing screw coupling, and the position corresponding with described screw is provided with the through hole that mates with standing screw on the described substrate.
7. high pressure knife switch as claimed in claim 3, it is characterized in that, described pressure apparatus is a reed, and described fixture is the standing screw that is fixedly connected on the described contact, and the position corresponding with described standing screw is provided with the through hole that mates with standing screw on the described substrate.
8. as the arbitrary described high pressure knife switch of claim 2 to 7, it is characterized in that described contact is at least two, and with the pressure apparatus and the fixture of described contact quantity Matching.
9. high pressure knife switch as claimed in claim 8 is characterized in that, the one side that described contact contacts with described knife-edge moving contact is provided with two boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205336374U CN201820643U (en) | 2010-09-17 | 2010-09-17 | High voltage knife switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205336374U CN201820643U (en) | 2010-09-17 | 2010-09-17 | High voltage knife switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201820643U true CN201820643U (en) | 2011-05-04 |
Family
ID=43918589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205336374U Expired - Fee Related CN201820643U (en) | 2010-09-17 | 2010-09-17 | High voltage knife switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201820643U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715958A (en) * | 2013-12-16 | 2015-06-17 | 西门子公司 | Earthing switch and disconnecting switch with earthing switch |
| CN107689306A (en) * | 2016-08-05 | 2018-02-13 | 天津中电华利电器科技集团有限公司 | A kind of knife-like switch |
-
2010
- 2010-09-17 CN CN2010205336374U patent/CN201820643U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715958A (en) * | 2013-12-16 | 2015-06-17 | 西门子公司 | Earthing switch and disconnecting switch with earthing switch |
| CN104715958B (en) * | 2013-12-16 | 2017-12-12 | 西门子公司 | A kind of earthed switch and its disconnecting switch |
| CN107689306A (en) * | 2016-08-05 | 2018-02-13 | 天津中电华利电器科技集团有限公司 | A kind of knife-like switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20170917 |