CN104332350A - Circuit breaker and circuit breaker contact centering support device - Google Patents
Circuit breaker and circuit breaker contact centering support device Download PDFInfo
- Publication number
- CN104332350A CN104332350A CN201410651450.7A CN201410651450A CN104332350A CN 104332350 A CN104332350 A CN 104332350A CN 201410651450 A CN201410651450 A CN 201410651450A CN 104332350 A CN104332350 A CN 104332350A
- Authority
- CN
- China
- Prior art keywords
- center bridge
- pilot hole
- circuit breaker
- piston
- core bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
Landscapes
- Gas-Insulated Switchgears (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a circuit breaker and a circuit breaker contact centering support device. The circuit breaker comprises a porcelain sleeve, a core rod and a fixed contact arranged on the front end of the core rod, wherein the core rod is provided with a centering support device in a sleeved manner; the centering support device comprises a centering block; the centering block is provided with inner holes which run through front and back; the centering block is provided with a guide hole which communicates the inner holes of the centering block with the outer part of the centering block; the guide hole is internally equipped with a support mechanism in a guiding manner; the support mechanism comprises a piston which matches the guide hole in a sliding and sealing manner, a support rod which matches with the outer end face of the piston in an ejecting manner and a single-way thrust mechanism which is used for preventing the support rod from moving from outside to inside; the core rod is provided with an air channel which is communicated with the inner holes of the centering block. High-pressure gas is filled in the air channel of the core rod, the high-pressure gas drives the support rod to move from inside to outside, and the support rod is tightly ejected on the inner wall of the porcelain sleeve, so that the support rod is guaranteed to not move from the outer part of the centering block to the inner part under the action of a blocking structure, and the support rod is reliably ejected and pressed at the inner wall of the porcelain sleeve to centralize and support the core rod.
Description
Technical field
The present invention relates to high voltage switchgear field, be specifically related to a kind of circuit breaker and contact of breaker centering support device.
Background technology
In extra-high voltage Force system, circuit breaker closes unloaded long line, particularly supply voltage amplitude and circuit residual voltage anti-phase time close a floodgate, due to the sudden change of line parameter circuit value, on electrical network, the vibration of electromagnetic energy can cause larger overvoltage.In order to the generation of over-voltage, be typically employed in circuit breaker and install switching-on resistance, when closing a floodgate, the part energy absorption in electrical network can be converted into heat energy by switching-on resistance, slackens electromagnetic viscosimeter, the object of over-voltage to reach.But in porcelain knob breaker, porcelain bushing is generally tubular structure, by the restriction of the size of porcelain bushing, the resistive element of switching-on resistance often adopts the structure of round sheet, multi-disc resistor disc together parallel in tandem insulation core bar on and in aggregates with the fixed contact structure in circuit breaker, the structure of switching-on resistance is slim-lined construction, for ensureing insulation property, the resistor disc of switching-on resistance generally adopts insulating part to carry out connecting and supports, the integral rigidity of switching-on resistance is poor, causes the centering of dynamic and static contact bad.Circuit breaker generally has two kinds of structure of contact terminal forms, and one is adopt plug-in type structure of contact terminal, for ensureing that moving contact reliably inserts in fixed contact, require higher to the axiality of dynamic and static contact, advantage be such circuit breaker when closing operation, contact not easily produces spring, good stability; Two is adopt dock structure of contact terminal, adopt the axiality of the circuit breaker of this structure to contact less demanding, but when closing a floodgate, easily produce spring during contact, contact stabilization is poor.Therefore, most what adopt is the circuit breaker of the first plug-in type structure of contact terminal, so just needs to solve the bad problem of dynamic and static contact centering.
Summary of the invention
The object of the present invention is to provide a kind of centering support device, poor with the dynamic and static contact centering solved in circuit breaker, the problem that contact is unstable; The present invention simultaneously also provides a kind of circuit breaker using this centering support device.
To achieve these goals, a kind of circuit breaker of the present invention adopts following technical scheme:
A kind of circuit breaker, comprise porcelain bushing, the core bar inserted from porcelain bushing one end and be located at the fixed contact of core bar front end, rear in fixed contact on described core bar is equipped with switching-on resistance, described core bar is arranged with centering support device, described centering support device comprises center bridge, endoporus that is through and core bar external diameter adaptation before and after described center bridge has, described center bridge is provided with the endoporus of connection center bridge and the pilot hole of center bridge space outerpace of radial extension, in described pilot hole, guiding is equipped with supporting mechanism, described supporting mechanism comprises the piston coordinated with pilot hole slipper seal being positioned at pilot hole the inner, that coordinate with the outer face pushing tow of piston and center bridge can be stretched out and push up the support bar that is pressed onto porcelain bushing inwall and from inside to outside move for holding support bar under the thrust of piston, stop the unidirectional thrust structure of support bar movement from outside to inside, described core bar has the air flue of the endoporus being communicated with center bridge.
The opening of the air flue of described core bar is located at the front end of core bar, and described fixed contact is provided with the through through hole in the front and back that are communicated with the air flue of core bar.
The other end of described porcelain bushing is provided with the flange for inflatable tool assembling, and one end away from described flange of described inflatable tool can extend in the air flue of core bar.
The pilot hole of described locating piece is convexly equipped with the block to piston limit in the front of piston.
Described unidirectional thrust structure comprises floor clip and the spiral spacing to floor clip and is assemblied in plug screw in the pilot hole of center bridge.
One end that described support bar and porcelain bushing inwall top are pressed is installed with rubber squeeze head.
A kind of centering support device of the present invention adopts following technical scheme, comprise center bridge, endoporus that is through and core bar external diameter adaptation before and after described center bridge has, described center bridge is provided with the endoporus of connection center bridge and the pilot hole of center bridge space outerpace of radial extension, in described pilot hole, guiding is equipped with supporting mechanism, described supporting mechanism comprises the piston coordinated with pilot hole slipper seal being positioned at pilot hole the inner, that coordinate with the outer face pushing tow of piston and center bridge can be stretched out and push up the support bar that is pressed onto porcelain bushing inwall and from inside to outside move for holding support bar under the thrust of piston, stop the unidirectional thrust structure of support bar movement from outside to inside.
The pilot hole of described locating piece is convexly equipped with the block to piston limit in the front of piston.
Described unidirectional thrust structure comprises floor clip and the spiral spacing to floor clip and is assemblied in plug screw in the pilot hole of center bridge.
Described support bar outer end is installed with rubber squeeze head.
Beneficial effect of the present invention is: sheathed centering support device on the core bar being equipped with fixed contact, this centering support device comprises along center bridge circumference supporting mechanism spaced apart, core bar has the air flue be communicated with the pilot hole of center bridge, by injecting gases at high pressure in the air flue of core bar, the support bar that gases at high pressure can promote supporting mechanism is simultaneously moved by center bridge Inside To Outside, support bar holds out against on the inwall of porcelain bushing, due to the effect of unidirectional thrust structure, can ensure that support bar can not move inward from center bridge outside, make it reliably push up and be pressed in porcelain bushing inwall, centering support effect is played to core bar, improve the rigidity of fixed contact and switching-on resistance, when closing a floodgate, can ensure dynamic, the axiality of fixed contact, make the contact stabilization of contact better.
Accompanying drawing explanation
Fig. 1 is the structural representation of circuit breaker embodiment of the present invention;
Fig. 2 is the structural representation of centering support device in Fig. 1;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the partial schematic diagram of Fig. 2;
Fig. 5 is the assembled state structural representation of circuit breaker of the present invention.
Embodiment
The embodiment of circuit breaker of the present invention, as Figure 1-5: comprise the fixed contact supporting seat 7, fixed contact 3, switching-on resistance 4, centering support device 5, the moving contact 1 coordinated with fixed contact 3 grafting and the porcelain bushing 2 that are positioned at right-hand member, moving contact 1 and fixed contact 3 belong to prior art with the annexation of porcelain bushing 2, no longer describe in detail.The front end of porcelain bushing 2 is provided with the flange for installing moving contact 1, and flange also can be used for assembling inflatable tool 8.Electricity 4 resistance of closing a floodgate comprises multiple left and right and is arranged at intervals at pellet resistance sheet on core bar 6, fixed contact 3 is assemblied in the front end in core bar 6, core bar 6 is arranged with the centering support device 5 for ensureing fixed contact 3 and moving contact 1 axiality, centering support device 5 comprises the columned center bridge 50 with the endoporus matched with core bar 6 external diameter, the periphery of center bridge 50 offers the radial connection endoporus of extension and the pilot hole 55 of center bridge outside, pilot hole 55 is shoulder hole, pilot hole 55 is intervally distributed with three rows in the longitudinal direction, the pilot hole 55 of each row comprises six and is all spacedly distributed along center bridge 50 circumference.In each pilot hole 55, all guiding is equipped with supporting mechanism, supporting mechanism comprises the piston 52 that slipper seal is assemblied in pilot hole front end, piston 52 realizes the sealing with pilot hole 55 by O RunddichtringO 53, pilot hole 55 the inner is convexly equipped with the block 51 spacing to piston 52, block 51 is communicated with center bridge endoporus and pilot hole 55, the outer end spiral of pilot hole 55 is equipped with screw plug 58, screw plug 58 has through shoulder hole, near the step surface place of one end of screw plug 58 diameter holes, floor clip 56 is installed, by plug screw 57, floor clip 56 is fixed, the support bar 54 with pilot hole 55 coaxial line is equipped with in the centre bore of floor clip 56 and the shoulder hole of screw plug 58, the front end of support bar 54 coordinates with the rear end face pushing tow of piston 52, the rearward end of support bar 54 is installed with rubber squeeze head 59, rubber squeeze head 59 can play cushioning effect, reduce the impact of support bar 54 pairs of porcelain bushing 2 inwalls, the length of support bar 54 can ensure to stretch out center bridge 50 under the active force of piston 52, and make rubber squeeze head 59 hold out against porcelain bushing 2 inwall.Core bar 6 offers opening towards moving contact 1 side and the air flue be communicated with each pilot hole 55 of center bridge 50, offer the pore be communicated with each corresponding pilot hole 55 inside core bar 6, fixed contact 3 is provided with the through through hole in the front and back that are communicated with the air flue of core bar 6.
Circuit breaker of the present invention when mounted, first centering support device 5 and resistor disc are together arranged on core bar 6, make the pilot hole 55 of centering support device 5 corresponding with the pore that core bar 6 is offered, to make gas communication, fixed contact 3 is assemblied in the left end of core bar 6, the rubber squeeze head 59 of support bar 54 applies glue, then fixed contact 3 and switching-on resistance 4 is fixed on fixed contact pedestal 7 together, porcelain bushing 2 to be sleeved on outside fixed contact and to be connected with fixed contact pedestal 7.Temporarily moving contact 1 is not installed, inflatable tool 8 is arranged on the position of moving contact 1, inflatable tool 8 inserts in the air flue of core bar 6, and gases at high pressure are filled with in core bar 6, gases at high pressure act on the front end of piston 52, and piston 52 is moved to the side away from center bridge 50 endoporus, piston 52 promotes support bar 54 and moves to equidirectional, rubber squeeze head 59 top of final each support bar 54 end is pressed on the inwall of porcelain bushing 2, removes inflatable tool 8, installs moving contact 1.Although lose the active force of gases at high pressure, but the effect due to floor clip 56 makes support bar 54 not return voluntarily, top is pressed on porcelain bushing 2 inwall always, after the adhesive curing of after a while support bar 54 end being smeared, makes the fixed effect of centering support device 5 better.Under the effect of each support bar 54, ensure that the rigidity of core bar 6, make when closing a floodgate, the contact stabilization of dynamic and static contact is better.
In other embodiments, the quantity of supporting mechanism can be set to three, and three supporting mechanisms are spaced apart along center bridge circumference, and the interval angles of adjacent supporting mechanism is not more than 180 degree; The quantity of supporting mechanism also can be arranged to four, six etc., and the interval angles between adjacent supports mechanism can ensure that the support bar of each supporting mechanism is that the inwall of porcelain bushing holds out against rear core bar and deflection do not occur.
In other embodiments, also can not arrange screw plug, the pilot hole of center bridge arranges the block step surface spacing to floor clip in installation floor clip place, and now the direct spiral of plug screw is assemblied in pilot hole and fixes floor clip.
In other embodiments, stop the unidirectional thrust structure of support bar ecto-entad movement, also ratchet structure can be adopted, on support bar periphery, now offer the teeth groove matched with the ratchet be arranged in pilot hole, make support bar can only outwards movement inside center bridge by ratchet structure, and can not back move.
The embodiment of centering support device of the present invention, the concrete structure of centering support device is identical with the structure of the centering support device adopted in above-mentioned circuit breaker, does not repeat them here.
Claims (10)
1. a circuit breaker, comprise porcelain bushing, the core bar inserted from porcelain bushing one end and be located at the fixed contact of core bar front end, rear in fixed contact on described core bar is equipped with switching-on resistance, it is characterized in that: described core bar is arranged with centering support device, described centering support device comprises center bridge, endoporus that is through and core bar external diameter adaptation before and after described center bridge has, described center bridge is provided with the endoporus of connection center bridge and the pilot hole of center bridge space outerpace of radial extension, in described pilot hole, guiding is equipped with supporting mechanism, described supporting mechanism comprises the piston coordinated with pilot hole slipper seal being positioned at pilot hole the inner, that coordinate with the outer face pushing tow of piston and center bridge can be stretched out and push up the support bar that is pressed onto porcelain bushing inwall and from inside to outside move for holding support bar under the thrust of piston, stop the unidirectional thrust structure of support bar movement from outside to inside, described core bar has the air flue of the endoporus being communicated with center bridge.
2. circuit breaker according to claim 1, is characterized in that: the opening of the air flue of described core bar is located at the front end of core bar, and described fixed contact is provided with the through through hole in the front and back that are communicated with the air flue of core bar.
3. circuit breaker according to claim 1, is characterized in that: the other end of described porcelain bushing is provided with the flange for inflatable tool assembling, and one end away from described flange of described inflatable tool can extend in the air flue of core bar.
4. circuit breaker according to claim 1, is characterized in that: the pilot hole of described locating piece is convexly equipped with the block to piston limit in the front of piston.
5. circuit breaker according to claim 1, is characterized in that: described unidirectional thrust structure comprises floor clip and the spiral spacing to floor clip and is assemblied in plug screw in the pilot hole of center bridge.
6. according to the circuit breaker in claim 1-5 described in any one, it is characterized in that: one end that described support bar and porcelain bushing inwall top are pressed is installed with rubber squeeze head.
7. a centering support device, it is characterized in that: comprise center bridge, endoporus that is through and core bar external diameter adaptation before and after described center bridge has, described center bridge is provided with the endoporus of connection center bridge and the pilot hole of center bridge space outerpace of radial extension, in described pilot hole, guiding is equipped with supporting mechanism, described supporting mechanism comprises the piston coordinated with pilot hole slipper seal being positioned at pilot hole the inner, that coordinate with the outer face pushing tow of piston and center bridge can be stretched out and push up the support bar that is pressed onto porcelain bushing inwall and from inside to outside move for holding support bar under the thrust of piston, stop the unidirectional thrust structure of support bar movement from outside to inside.
8. centering support device according to claim 7, is characterized in that: the pilot hole of described locating piece is convexly equipped with the block to piston limit in the front of piston.
9. centering support device according to claim 7, is characterized in that: described unidirectional thrust structure comprises floor clip and the spiral spacing to floor clip and is assemblied in plug screw in the pilot hole of center bridge.
10. according to the centering support device in claim 7-9 described in any one, it is characterized in that: described support bar outer end is installed with rubber squeeze head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410651450.7A CN104332350B (en) | 2014-11-17 | 2014-11-17 | A kind of breaker and contact of breaker centering bracing or strutting arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410651450.7A CN104332350B (en) | 2014-11-17 | 2014-11-17 | A kind of breaker and contact of breaker centering bracing or strutting arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104332350A true CN104332350A (en) | 2015-02-04 |
| CN104332350B CN104332350B (en) | 2016-05-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410651450.7A Active CN104332350B (en) | 2014-11-17 | 2014-11-17 | A kind of breaker and contact of breaker centering bracing or strutting arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104332350B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221472A (en) * | 2017-05-05 | 2017-09-29 | 平高集团有限公司 | Resistor disc crimping structure and breaker |
| CN108122699A (en) * | 2016-11-29 | 2018-06-05 | 河南平高电气股份有限公司 | Porcelain knob breaker parallel resistance static contact centering method of adjustment and adjustment frock |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3906180A (en) * | 1973-06-04 | 1975-09-16 | Sprecher & Schuh Ag | Gas-blast switch |
| US4029923A (en) * | 1976-01-15 | 1977-06-14 | Westinghouse Electric Corporation | Magnetizing current switch |
| US5483210A (en) * | 1994-04-08 | 1996-01-09 | Abb Power T&D Company Inc. | Mechanical guidance system for switcher interrupter and method for assembling the same |
| CN1165385A (en) * | 1995-12-16 | 1997-11-19 | 亚瑞亚·勃朗勃威力有限公司 | Power circuit-breaker having closing resistor |
| JP2002245909A (en) * | 2001-02-22 | 2002-08-30 | Hitachi Ltd | Gas circuit breaker |
| CN2817041Y (en) * | 2005-08-26 | 2006-09-13 | 王光顺 | Multiple-speed disjunction contact for super-high-voltage switch |
| CN201549425U (en) * | 2009-10-27 | 2010-08-11 | 中国西电电气股份有限公司 | Static side device of outdoor high-voltage AC porcelain knob type SF6 breaker |
| CN201570436U (en) * | 2009-06-09 | 2010-09-01 | 上海维埃姆电力科技有限公司 | Self-energy sulphur hexafluoride high-voltage circuit breaker |
-
2014
- 2014-11-17 CN CN201410651450.7A patent/CN104332350B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3906180A (en) * | 1973-06-04 | 1975-09-16 | Sprecher & Schuh Ag | Gas-blast switch |
| US4029923A (en) * | 1976-01-15 | 1977-06-14 | Westinghouse Electric Corporation | Magnetizing current switch |
| US5483210A (en) * | 1994-04-08 | 1996-01-09 | Abb Power T&D Company Inc. | Mechanical guidance system for switcher interrupter and method for assembling the same |
| CN1165385A (en) * | 1995-12-16 | 1997-11-19 | 亚瑞亚·勃朗勃威力有限公司 | Power circuit-breaker having closing resistor |
| JP2002245909A (en) * | 2001-02-22 | 2002-08-30 | Hitachi Ltd | Gas circuit breaker |
| CN2817041Y (en) * | 2005-08-26 | 2006-09-13 | 王光顺 | Multiple-speed disjunction contact for super-high-voltage switch |
| CN201570436U (en) * | 2009-06-09 | 2010-09-01 | 上海维埃姆电力科技有限公司 | Self-energy sulphur hexafluoride high-voltage circuit breaker |
| CN201549425U (en) * | 2009-10-27 | 2010-08-11 | 中国西电电气股份有限公司 | Static side device of outdoor high-voltage AC porcelain knob type SF6 breaker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108122699A (en) * | 2016-11-29 | 2018-06-05 | 河南平高电气股份有限公司 | Porcelain knob breaker parallel resistance static contact centering method of adjustment and adjustment frock |
| CN108122699B (en) * | 2016-11-29 | 2019-07-19 | 河南平高电气股份有限公司 | Porcelain knob breaker parallel resistance static contact centering method of adjustment and adjustment tooling |
| CN107221472A (en) * | 2017-05-05 | 2017-09-29 | 平高集团有限公司 | Resistor disc crimping structure and breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104332350B (en) | 2016-05-25 |
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