CN103165337A - Circuit breaker and insulation method thereof - Google Patents
Circuit breaker and insulation method thereof Download PDFInfo
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- CN103165337A CN103165337A CN2011104248604A CN201110424860A CN103165337A CN 103165337 A CN103165337 A CN 103165337A CN 2011104248604 A CN2011104248604 A CN 2011104248604A CN 201110424860 A CN201110424860 A CN 201110424860A CN 103165337 A CN103165337 A CN 103165337A
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- insulation
- insulating part
- breaker
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- moving component
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Abstract
The invention discloses an insulation structure used for a moving part and a vacuum circuit breaker including the insulation structure. The moving part is contained in an insulation shell body and can move between at least two positions. The moving part comprises an electriferous first end, a grounded second end opposite to the first end and an insulation portion arranged between the first end and the second end, wherein the first end is insulated with the second end through the insulation portion. The moving part is characterized by further comprising an extensible insulating part. The inner periphery side of the insulating part is connected with the periphery of the insulation portion in an enclosing and air seal mode. The peripheral side of the insulation portion is connected with the insulation shell body in an air seal mode so that the first end is separated from the second end in the air seal mode.
Description
Technical field
The present invention relates to a kind of circuit breaker, especially a kind of mesohigh vacuum circuit-breaker, and relate to insulation system and insulating method for this vacuum circuit-breaker.
Background technology
Circuit breaker is electric equipment commonly used in circuit, is used for open circuit under overload, the failure condition such as overheated occurring at circuit.Circuit breaker can be divided into low-voltage circuit breaker and primary cut-out according to its rated voltage.Primary cut-out uses in the circuit of 1000V at voltage usually; its not only can cut off or the closed high circuit in no-load current and load current; and the effect by relay protection when system breaks down, cut off overload electric current and short circuit current.Primary cut-out commonly used comprises oil circuit breaker (bulk-oil circuit-breaker, oil-minimum breaker), sulfur hexafluoride breaker (SF6 circuit breaker), vacuum circuit-breaker, compressed-air circuit breaker etc.
Vacuum circuit-breaker because of its arc-extinguishing medium and arc extinguishing after the dielectric in contact gap be all that high vacuum is gained the name; It has advantages of that volume is little, lightweight, be applicable to frequent operation, arc extinguishing need not overhaul, and uses comparatively universal in power distribution network.
Vacuum circuit-breaker mainly comprises operating mechanism, vacuum bubbles, input and output terminal etc.Vacuum bubbles is contained in insulation burrel, and vacuum interrupter wherein is to utilize high vacuum operational insulation arc-extinguishing medium, by sealing a pair of moving contact in a vacuum and a kind of electron tube of the fixed contact on-off function of realizing power circuit.Moving contact in vacuum bubbles, that is, vacuum bubble moving end is connected with the operating mechanism of circuit breaker through the insulation pull bar, under the effect of operating mechanism, realizes the break-make of moving contact and fixed contact thus.
Insulated tension pole is shaft-like on the whole, generally include live end, the earth terminal that is connected with operating mechanism that is connected with vacuum bubble moving end and be arranged on live end and earth terminal between and with the insulated part of live end and earth terminal electric insulation.By means of insulated tension pole, with the high-tension electricity insulation of operating mechanism and vacuum bubble moving end.
But, this traditional primary cut-out still has problems aspect insulation, namely, in the situation that there is the moment high pulse voltage in system, exist transient high voltage poor between the earth terminal of the live end of the insulated tension pole that is connected with vacuum bubble moving end and the insulated tension pole that is connected with operating mechanism, if the curtailment of the insulated part of insulated tension pole, this high voltage difference can cause the air in insulation burrel breakdown, thus, cause the problem of vacuum bubble moving end short circuit.In order to prevent this problem, need the length of the insulated part of increase insulated tension pole, but being unfavorable for the overall dimensions of circuit breaker, this solution reduces, run counter to present development trend.
Summary of the invention
Therefore, the object of the invention is to make improving solution the problems of the prior art on the insulation system of vacuum circuit-breaker.
according to an aspect of the present invention, a kind of insulation system for moving component is provided, it is interior and movable between at least two positions that this moving component is contained in insulation shell, described moving component comprises charged first end, the second end of the ground connection relative with this first end, and be arranged between this first end and the second end with the insulated part with this first end and the insulation of the second end, this insulation system also comprises stretchable insulating part, interior all gussets of this insulating part connect airtightly around the periphery of described insulated part, and the outer circumferential side of this insulated part is connected on described insulation shell airtightly, so that described first end and described the second end are kept apart airtightly.
Thus, by between the second end of the charged first end of moving component and ground connection, insulating part being set, with with airtight keeping apart between first end and the second end, even in the situation that have instant high-voltage between first end and the second end, the air between first end and the second end can be not breakdown yet and be caused first end and the second terminal shortcircuit.Thus, improved the reliability of electric insulation.
Preferably, described stretchable insulating part is made by elastic insulating material, and more preferably, this elastic insulating material is silicon rubber.
Alternately, described stretchable insulating part has bellows-like structure.
Thus, the motion that the setting of this insulating part can't the impede motion parts.
As the example of an application, can be applied to the insulated tension pole of vacuum circuit-breaker according to insulation system of the present invention, in this case, described moving component is the insulated tension pole of vacuum circuit-breaker, described insulation shell is insulation burrel.Described first end is connected with the vacuum bubble moving end of vacuum circuit-breaker, and described the second end is connected with the operating mechanism of vacuum circuit-breaker.
Preferably, described insulating part is annular shape, and all sides are connected airtightly with the outer peripheral face of the insulated part of described insulated tension pole in it, and its outer circumferential side and described insulation burrel are tightly connected.
Interior all sides of described insulating part realize with airtight being connected by encapsulate, bonding, ultrasonic bonding, clamping of the outer peripheral face of described insulated tension pole.And described insulation burrel comprises step part, and the outer circumferential side of described insulating part is pressed on described step part by dead ring; Perhaps the outer circumferential side of described insulating part is airtight connected on the inner peripheral surface of described insulation burrel by bonding, ultrasonic bonding, compression.
According to a further aspect in the invention, provide a kind of vacuum circuit-breaker that comprises above-mentioned insulation system.
By the present invention, can be in the situation that do not increase the length of the insulated part of insulated tension pole, guarantee the electric insulation between the second end of the charged first end of insulated tension pole and ground connection, thus, be conducive to the compact dimensions of whole vacuum circuit-breaker.
In accordance with a further aspect of the present invention, a kind of method of moving component being carried out electric insulation is provided, it is interior and movable between at least two positions that this moving component is contained in insulation shell, described moving component comprise the second end of charged first end, the ground connection relative with this first end and be arranged on this first end and the second end between with the insulated part with this first end and the insulation of the second end, described method comprises:
First step: stretchable insulating part is provided;
Second step: interior all sides of described insulating part are airtight connected on the periphery of described insulated part; And
Third step: the outer circumferential side of described insulating part is airtight connected on described insulation shell, so that described first end and described the second end are kept apart airtightly.
Wherein, described second step and third step can be put upside down.
Preferably, described second step comprises by encapsulate, bonding, ultrasonic bonding, clamping interior all sides of insulating part is airtight connected on the periphery of described insulated part.
Preferably, described third step comprises by bonding, ultrasonic bonding, compression the outer circumferential side of described insulating part is airtight connected on described insulation shell; Perhaps described third step comprises provides dead ring, is pressed onto on the step step of described insulation shell by the outer circumferential side of dead ring with described insulating part.
As an application example according to insulating method of the present invention, described moving component is the insulated tension pole of vacuum circuit-breaker, and described insulation shell is the insulation burrel of vacuum circuit-breaker.
Utilize insulating method of the present invention, can be reliably with airtight keeping apart between the second end of charged first end and ground connection, even in the situation that have instant high-voltage between first end and the second end, the air between first end and the second end can be not breakdown yet and be caused first end and the second terminal shortcircuit.Thus, improved the reliability of electric insulation.Especially, in the situation that insulating method according to the present invention is applied to vacuum circuit-breaker, can be in the situation that do not increase the length of the insulated part of insulated tension pole, electric insulation between the charged first end of assurance insulated tension pole and the second end of ground connection, thus, the compact dimensions that is conducive to whole vacuum circuit-breaker.
Description of drawings
Above-mentioned various aspects of the present invention, advantage and industry and technical importance will become clearer by the detailed description to the preferred embodiment for the present invention with reference to the accompanying drawings, in accompanying drawing:
Fig. 1 illustrates the sketch of wherein having used according to the relevant portion of the vacuum circuit-breaker of the insulation system of the preferred embodiment of the present invention;
Fig. 2 is the perspective view that illustrates according to the insulation system of the preferred embodiment of the present invention; And
Fig. 3 is the cutaway view of Fig. 2.
Embodiment
Below, describe in detail according to the preferred embodiment of the present invention with reference to accompanying drawing.At first it is to be noted, the present invention only relates to the improvement to the electric insulation aspect of insulated tension pole, therefore, in the following description, to omit other structures of vacuum circuit-breaker and the detailed description of parts, those skilled in the art can obtain based on the background technology knowledge of himself concrete structure of these other parts and parts.In addition, in description below and appended claim, unless stated otherwise, each term should be understood according to the broad sense on common, for example, " connection " meaning comprises an element and is connected element and directly connects, and does not wherein have intermediary element, and comprises that also an element and another element pass through other intermediary element and be connected.In figure, Fig. 1 illustrates the sketch of wherein having used according to the relevant portion of the vacuum circuit-breaker of the insulation system of the preferred embodiment of the present invention; Fig. 2 is the perspective view that illustrates according to the insulation system of the preferred embodiment of the present invention; And Fig. 3 is the cutaway view of Fig. 2.
As shown in Figure 1, vacuum circuit-breaker 100 comprises operating mechanism 110, this operating mechanism in can response circuit faults such as overload, short circuit and trigger, make the moving contact of vacuum circuit-breaker 100 and fixed contact disconnect, thus, disconnect whole circuit.Operating mechanism 110 is connected via the moved end of insulated tension pole 120 with the vacuum bubbles 130 of holding therein moving contact (not shown) and fixed contact (not shown) usually, and the moving contact of handling thus in vacuum bubbles 130 moves.
Vacuum bubbles 130 and insulated tension pole 120 etc. are contained in insulation burrel 140, with extraneous electric insulation.In addition, operating mechanism 110 electrical groundings.
As shown in Figure 1, the moved end of vacuum bubbles 130 is connected with external circuitry through the terminal 170 of vacuum circuit-breaker, and thus, the moved end of vacuum bubbles 130 is applied in high voltage.
Therefore, electrical distance between live end 121 and earth terminal 122 depends on the length of insulated part 123, when transient high voltage occurring in circuit breaker, if the curtailment of insulated part 123, the air between live end 121 and earth terminal 122 might be breakdown, causes live end and therefore vacuum bubble moving end short circuit.But, if increase the length of insulated part 123 in order to overcome this problem, can cause the size of whole circuit breaker to increase undesirably.
In addition, because insulated tension pole 120 is moving components, as long as have small air gap between live end and earth terminal, can there be the risk of short circuit, therefore, utilize insulation system of the prior art to be difficult to realize electric insulation between live end and earth terminal.
In order to address this problem, the present inventor has proposed a kind of new insulation system.Below with reference to Fig. 2 and Fig. 3, the preferred embodiment of the present invention is described in detail.
For clear description the present invention, only show some important parts in Fig. 2 and Fig. 3, and omitted as parts such as operating mechanism, vacuum bubbles, and the parts such as insulated tension pole have been carried out abstract diagram.
As shown in Figures 2 and 3, on the periphery of the insulated part 123 of insulated tension pole 120, be provided with insulating part 150, this insulating part 150 is roughly ring discoid, by elastic insulating material, make as silicon rubber, in it, all close attachment are on the periphery of insulated part 123, this adherence method is included in to make in the insulated tension pole process and utilizes encapsulate (overmold) method to be molded directly on the insulated part 123 of insulated tension pole, perhaps can be after making respectively, by additive methods such as bonding, ultrasonic bonding, clampings, the present invention is not limited to this.
The neighboring close attachment of insulating part 150 is to insulation burrel 140, for example, as shown in Figure 3, by dead ring 160 is set, the neighboring of insulating part 150 is pressed on the stage portion 141 of insulation burrel 140, but, also can by the methods such as bonding, welding with the neighboring close attachment of insulating part 150 to the inner peripheral surface of insulation burrel, the present invention is not limited to this.
Thus, as shown in Figure 3, by insulating part 150, the live end 121 of insulated tension pole 120 and earth terminal 122 are opened by electrical isolation airtightly, prevent in equipment live end 121 and earth terminal 122 short circuits during by transient high voltage.
And because insulating part 150 is to be made by the insulation elastomeric material, in the motion process of insulated tension pole 120, these insulating part 150 strains do not hinder the motion of insulated tension pole 120 thus.
In addition, compare with the movable sealing structure that adopts sealing ring etc., insulation system of the present invention can be realized the complete airtight isolation between live end 121 and earth terminal 122, has improved the reliability of electric insulation.
Although in superincumbent preferred implementation, insulating part is made by elastic insulating material,, the present invention is not limited thereto, but can adopt other structure or material.As, insulating part also can adopt the material outside elastomeric material, for example, can adopt the insulating part of bellows structure, thus, realizes the similar effect of insulating part with top elastomeric material.
Although in superincumbent preferred implementation, insulating part of the present invention is applied on the insulated tension pole of vacuum circuit-breaker, but in fact the present invention can be applied in any similar electric equipment, with the electric insulation of the moving component of realizing and other end ground connection charged to an end.
In addition, the invention still further relates to a kind of insulating method to moving component, this moving component comprise charged first end, the second end electrical ground and be arranged on first end and the second end between insulated part, and it is interior and movable in this insulation shell that described moving component is contained in insulation shell, and described method comprises: stretchable insulating part is provided; The periphery of the insulated part of interior week of this insulating part and described moving component is tightly connected; Periphery and the described housing of this insulating part are tightly connected, thus in the first end of described moving component and the second end electrical isolation airtightly.Described insulating part can be the insulating part of ripple struction for elastic insulated or described insulating part.In addition, described moving component can be the insulated tension pole of vacuum circuit-breaker.
Above the present invention is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the present invention; change in specific embodiments and applications should not thought and departed from the scope of protection of the invention; any distortion in the claim protection range all falls into the protection range of type of the present invention; in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1. insulation system that is used for moving component, it is interior and movable between at least two positions that this moving component is contained in insulation shell, described moving component comprises charged first end, the second end of the ground connection relative with this first end, and be arranged between this first end and the second end with the insulated part with this first end and the insulation of the second end, it is characterized in that, also comprise stretchable insulating part, interior all gussets of this insulating part connect airtightly around the periphery of described insulated part, and the outer circumferential side of this insulated part is connected on described insulation shell airtightly, so that described first end and described the second end are kept apart airtightly.
2. insulation system as claimed in claim 1, is characterized in that, described stretchable insulating part is made by elastic insulating material.
3. insulation system as claimed in claim 2, is characterized in that, described elastic insulating material is silicon rubber.
4. insulation system as claimed in claim 1, is characterized in that, described stretchable insulating part has bellows-like structure.
5. insulation system as described in any one in claim 1 to 4, is characterized in that, described moving component is the insulated tension pole of vacuum circuit-breaker, and described insulation shell is insulation burrel.
6. insulation system as claimed in claim 5, is characterized in that, described first end is connected with the vacuum bubble moving end of vacuum circuit-breaker, and described the second end is connected with the operating mechanism of vacuum circuit-breaker.
7. insulation system as claimed in claim 6, is characterized in that, described insulating part is annular shape, and all sides are connected airtightly with the outer peripheral face of the insulated part of described insulated tension pole in it, and its outer circumferential side and described insulation burrel are tightly connected.
8. insulation system as claimed in claim 7, it is characterized in that, being tightly connected of interior all sides of described insulating part and the outer peripheral face of described insulated tension pole realizes by encapsulate, bonding, ultrasonic bonding or compression with the outer circumferential side of described insulating part and being tightly connected of inner peripheral surface of described insulation burrel.
9. insulation system as claimed in claim 7, is characterized in that, described insulation burrel comprises step part, and the outer circumferential side of described insulating part is pressed on described step part by dead ring.
10. a vacuum circuit-breaker, is characterized in that, this vacuum circuit-breaker comprises insulation system as claimed in any one of claims 1-9 wherein.
11. method of moving component being carried out electric insulation, it is interior and movable between at least two positions that this moving component is contained in insulation shell, described moving component comprise the second end of charged first end, the ground connection relative with this first end and be arranged on this first end and the second end between with the insulated part with this first end and the insulation of the second end, described method comprises:
First step: stretchable insulating part is provided;
Second step: interior all sides of described insulating part are airtight connected on the periphery of described insulated part; And
Third step: the outer circumferential side of described insulating part is airtight connected on described insulation shell, so that described first end and described the second end are kept apart airtightly.
12. method as claimed in claim 11 is characterized in that, described second step and third step can be put upside down.
13. method as described in claim 11 or 12 is characterized in that, being tightly connected by encapsulate, bonding, ultrasonic bonding or compressing in described second step and third step realizes.
14. method as described in claim 11 or 12 is characterized in that described third step comprises provides dead ring, is pressed onto on the step step of described insulation shell by the outer circumferential side of dead ring with described insulating part.
15. method as described in claim 11 or 12 is characterized in that described moving component is the insulated tension pole of vacuum circuit-breaker, and described insulation shell is the insulation burrel of vacuum circuit-breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110424860.4A CN103165337B (en) | 2011-12-16 | 2011-12-16 | Circuit breaker and insulating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110424860.4A CN103165337B (en) | 2011-12-16 | 2011-12-16 | Circuit breaker and insulating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103165337A true CN103165337A (en) | 2013-06-19 |
| CN103165337B CN103165337B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110424860.4A Active CN103165337B (en) | 2011-12-16 | 2011-12-16 | Circuit breaker and insulating method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111656476A (en) * | 2018-01-25 | 2020-09-11 | 西门子股份公司 | Electrical switching device |
Citations (5)
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|---|---|---|---|---|
| EP0660353A2 (en) * | 1993-12-24 | 1995-06-28 | Hitachi, Ltd. | Vacuum valve and method of manufacturing the same |
| DE29717616U1 (en) * | 1997-10-02 | 1997-11-20 | Sachsenwerk Ag | Gas-insulated vacuum switch |
| CN101425423A (en) * | 2007-10-29 | 2009-05-06 | 施耐德电气(中国)投资有限公司 | Vacuum circuit breaker polar and manufacturing method thereof |
| KR20100138638A (en) * | 2009-06-25 | 2010-12-31 | 엘에스산전 주식회사 | Vacuum interrupter of vacuum circuit breaker and method for detecting the degree of vacuum in the same |
| CN201877344U (en) * | 2010-11-17 | 2011-06-22 | 厦门明翰电气有限公司 | Pole post of vacuum circuit breaker |
-
2011
- 2011-12-16 CN CN201110424860.4A patent/CN103165337B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660353A2 (en) * | 1993-12-24 | 1995-06-28 | Hitachi, Ltd. | Vacuum valve and method of manufacturing the same |
| DE29717616U1 (en) * | 1997-10-02 | 1997-11-20 | Sachsenwerk Ag | Gas-insulated vacuum switch |
| CN101425423A (en) * | 2007-10-29 | 2009-05-06 | 施耐德电气(中国)投资有限公司 | Vacuum circuit breaker polar and manufacturing method thereof |
| KR20100138638A (en) * | 2009-06-25 | 2010-12-31 | 엘에스산전 주식회사 | Vacuum interrupter of vacuum circuit breaker and method for detecting the degree of vacuum in the same |
| CN201877344U (en) * | 2010-11-17 | 2011-06-22 | 厦门明翰电气有限公司 | Pole post of vacuum circuit breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111656476A (en) * | 2018-01-25 | 2020-09-11 | 西门子股份公司 | Electrical switching device |
| US11424087B2 (en) | 2018-01-25 | 2022-08-23 | Siemens Energy Global GmbH & Co. KG | Electrical switching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103165337B (en) | 2016-03-30 |
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