CN103165337B - Circuit breaker and insulating method thereof - Google Patents
Circuit breaker and insulating method thereof Download PDFInfo
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- CN103165337B CN103165337B CN201110424860.4A CN201110424860A CN103165337B CN 103165337 B CN103165337 B CN 103165337B CN 201110424860 A CN201110424860 A CN 201110424860A CN 103165337 B CN103165337 B CN 103165337B
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Abstract
The invention discloses a kind of insulation system for moving component and comprise the vacuum circuit-breaker of this insulation system, this moving component is contained in insulation shell also movable between at least two positions, described moving component comprises charged first end, 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 by this first end and the insulation of the second end, it is characterized in that, also comprise stretchable insulating part, the inner circumferential side of this insulating part connects 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 second end are kept apart airtightly.
Description
Technical field
The present invention relates to a kind of circuit breaker, especially a kind of mesohigh vacuum circuit-breaker, and the insulation system related to for this vacuum circuit-breaker and insulating method.
Background technology
Circuit breaker is the electric equipment commonly used in circuit, for there is open circuit under overload, the failure condition such as overheated in circuit.Circuit breaker can be divided into low-voltage circuit breaker and primary cut-out according to its rated voltage.Primary cut-out uses usually in the circuit of voltage more than 1000V; it not only can cut off or no-load current in closed high circuit and load current; and when system jam by the effect of relay protection, cut off overload electric current and short circuit current.Conventional primary cut-out 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 is gained the name because the dielectric of contact gap after its arc-extinguishing medium and arc extinguishing is all high vacuum; It has volume little, lightweight, be applicable to frequent operation, advantage that arc extinguishing need not overhaul, apply 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 utilizes high vacuum operational insulation arc-extinguishing medium, realizes a kind of electron tube of the on-off function of power circuit by sealing a pair moving contact in a vacuum and fixed contact.Moving contact in vacuum bubbles, that is, vacuum bubble moving end is connected with the operating mechanism of circuit breaker through insulated tension pole, thus under the effect of operating mechanism, realizes the break-make of moving contact and fixed contact.
Insulated tension pole is shaft-like on the whole, generally includes earth terminal that the live end that is connected with vacuum bubble moving end is connected with operating mechanism and to be arranged between live end and earth terminal and by the insulated part of live end and earth terminal electric insulation.By means of insulated tension pole, by the high voltage electrical isolation of operating mechanism and vacuum bubble moving end.
But, this traditional primary cut-out still has problems in insulation, namely, when there is moment high pulse voltage in systems in which, between the live end of the insulated tension pole be connected with vacuum bubble moving end and the earth terminal of insulated tension pole be connected with operating mechanism, there is transient high voltage difference, if the curtailment of the insulated part of insulated tension pole, this high voltage difference can cause the air in insulation burrel breakdown, thus, the problem of vacuum bubble moving end short circuit is caused.In order to prevent this problem, need the length of the insulated part increasing insulated tension pole, but this solution is unfavorable for that the overall dimensions of circuit breaker reduces, and runs counter to current 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, provide a kind of insulation system for moving component, this moving component is contained in insulation shell also movable between at least two positions, described moving component comprises charged first end, 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 by this first end and the insulation of the second end, this insulation system also comprises stretchable insulating part, the inner circumferential side of this insulating part connects 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 second end are kept apart airtightly.
Thus, by arranging insulating part between the charged first end and the second end of ground connection of moving component, to keep apart airtight between first end and the second end, even if when there is instant high-voltage between a first end and a second end, the air between first end and the second end also can not be breakdown and cause first end and the second terminal shortcircuit.Thus, improve the reliability of electric insulation.
Preferably, described stretchable insulating part is made up of elastic insulating material, it is further preferred that this elastic insulating material is silicon rubber.
Alternately, described stretchable insulating part has bellows-like structure.
Thus, the setting of this insulating part can't the motion of 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, and described insulation shell is insulation burrel.Described first end is connected with the vacuum bubble moving end of vacuum circuit-breaker, and described second end is connected with the operating mechanism of vacuum circuit-breaker.
Preferably, described insulating part is annular shape, and its inner circumferential side is connected airtightly with the outer peripheral face of the insulated part of described insulated tension pole, and its outer circumferential side and described insulation burrel are tightly connected.
The airtight connection of the inner circumferential side of described insulating part and the outer peripheral face of described insulated tension pole is realized by encapsulate, bonding, ultrasonic bonding, clamping.And described insulation burrel comprises step part, the outer circumferential side of described insulating part is pressed on described step part by dead ring; Or 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, a kind of vacuum circuit-breaker comprising above-mentioned insulation system is provided.
By the present invention, when not increasing the length of insulated part of insulated tension pole, the electric insulation between the charged first end of insulated tension pole and the second end of ground connection can be ensured, thus, is conducive to the compact dimensions of whole vacuum circuit-breaker.
In accordance with a further aspect of the present invention, provide a kind of method of moving component being carried out to electric insulation, this moving component is contained in insulation shell also movable between at least two positions, described moving component comprises the second end of the charged first end ground connection relative with this first end and is arranged on the insulated part this first end and the second end insulated between this first end and the second end, and described method comprises:
First step: stretchable insulating part is provided;
Second step: the inner circumferential side of described insulating part is airtight connected on the periphery of described insulated part; And
Third step: be airtight connected to by the outer circumferential side of described insulating part on described insulation shell, to keep apart described first end and described second end airtightly.
Wherein, described second step and third step can be put upside down.
Preferably, described second step is comprised and being airtight connected on the periphery of described insulated part the inner circumferential side of insulating part by encapsulate, bonding, ultrasonic bonding, clamping.
Preferably, described third step comprises and is airtight connected on described insulation shell by bonding, ultrasonic bonding, compression by the outer circumferential side of described insulating part; Or described third step comprises provides dead ring, by dead ring, the outer circumferential side of described insulating part is pressed onto in the step step of described insulation shell.
As an application example of insulating method according to 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 reliably keep apart airtight between charged first end and the second end of ground connection, even if when there is instant high-voltage between a first end and a second end, the air between first end and the second end also can not be breakdown and cause first end and the second terminal shortcircuit.Thus, improve the reliability of electric insulation.Especially, when insulating method according to the present invention is applied to vacuum circuit-breaker, can when not increasing the length of insulated part of insulated tension pole, ensure the electric insulation between the charged first end of insulated tension pole and the second end of ground connection, thus, the compact dimensions of whole vacuum circuit-breaker is conducive to.
Accompanying drawing explanation
Above-mentioned various aspects of the present invention, advantage and industry and technical importance are by by becoming clearer, in accompanying drawing to the detailed description of the preferred embodiment for the present invention with reference to the accompanying drawings:
Fig. 1 is the sketch of the relevant portion of the vacuum circuit-breaker that the insulation system wherein applied according to the preferred embodiment of the present invention is shown;
Fig. 2 is the perspective view of the insulation system illustrated according to 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.First it is to be noted, the present invention only relates to the improvement of the electric insulation aspect to insulated tension pole, therefore, in the following description, by omission to other structures of vacuum circuit-breaker and the detailed description of parts, those skilled in the art can obtain the concrete structure of these other parts and parts based on the background technology knowledge of himself.In addition, in description below and appended claim, unless stated otherwise, each term should be understood according to the broad sense on usually, such as, " connection " meaning comprises an element and is directly connected with another element, wherein there is not intermediary element, and also comprises an element and be connected with other intermediary element of another element process.In figure, Fig. 1 is the sketch of the relevant portion of the vacuum circuit-breaker that the insulation system wherein applied according to the preferred embodiment of the present invention is shown; Fig. 2 is the perspective view of the insulation system illustrated according to 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, and this operating mechanism can fault such as such as overload, short circuit etc. in response circuit and triggering, and the moving contact of vacuum circuit-breaker 100 and fixed contact is disconnected, thus, disconnects whole circuit.Operating mechanism 110 usually via insulated tension pole 120 with hold the moved end of moving contact (not shown) with the vacuum bubbles 130 of fixed contact (not shown) wherein and be connected, the moving contact action thus in manipulation vacuum bubbles 130.
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 grounding.
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.
Insulated tension pole 120 comprises being connected with the moved end of vacuum bubbles and is endowed high-tension live end 121 thus; Be connected with operating mechanism 110 and the earth terminal 122 be grounded; And to be arranged between live end and earth terminal and by the insulated part 123 of live end and earth terminal electric insulation.
Therefore, electrical distance between live end 121 and earth terminal 122 depends on the length of insulated part 123, when there is transient high voltage in circuit breaker, if the curtailment of insulated part 123, air then between live end 121 and earth terminal 122 is likely breakdown, causes live end and therefore vacuum bubble moving end short circuit.But, if increase the length of insulated part 123 to overcome this problem, then the size of whole circuit breaker can be caused to increase undesirably.
In addition, because insulated tension pole 120 is moving components, as long as there is small air gap between live end and earth terminal, then the risk of short circuit can be there is, therefore, insulation system of the prior art is utilized to be difficult to realize the electric insulation between live end and earth terminal.
In order to address this problem, the present inventor proposes a kind of new insulation system.Referring to Fig. 2 and Fig. 3, the preferred embodiment of the present invention is described in detail.
In order to clear description the present invention, illustrate only the parts that some are important in Fig. 2 and Fig. 3, and eliminate as the parts such as operating mechanism, vacuum bubbles, and abstract diagram has been carried out to parts such as insulated tension poles.
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, as silicon rubber is made, its inner circumferential close attachment is on the periphery of insulated part 123, this adherence method is included in manufacture in insulated tension pole process and utilizes encapsulate (overmold) method to be molded directly on the insulated part 123 of insulated tension pole, or can after making respectively, by the additive method such as bonding, ultrasonic bonding, clamping, the present invention is not limited to this.
The neighboring close attachment of insulating part 150 is on insulation burrel 140, such as, as shown in Figure 3, by arranging dead ring 160, the neighboring of insulating part 150 is pressed in the stage portion 141 of insulation burrel 140, but, also can by methods such as bonding, welding by the neighboring close attachment of insulating part 150 on 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 at equipment by live end during transient high voltage 121 and earth terminal 122 short circuit.
Further, because insulating part 150 is made up of insulating elastic material, in the motion process of insulated tension pole 120, this insulating part 150 strain, does not hinder the motion of insulated tension pole 120 thus.
In addition, compared with adopting the movable sealing structure of sealing ring etc., insulation system of the present invention can realize the complete airtight isolation between live end 121 and earth terminal 122, improves the reliability of electric insulation.
Although in superincumbent preferred implementation, insulating part is made up of 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, such as, can adopt the insulating part of bellows structure, thus, realizes the effect similar with the insulating part of elastomeric material above.
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, to realize and electric insulation of the moving component of other end ground connection charged to one end.
In addition, the invention still further relates to a kind of insulating method to moving component, the insulated part that this moving component comprises charged first end, the second end electrical ground and is arranged between first end and the second end, and it is interior and movable in this insulation shell that described moving component is contained in insulation shell, and described method comprises: provide stretchable insulating part; The periphery of the insulated part of the inner circumferential of this insulating part and described moving component is tightly connected; The periphery of this insulating part and described housing are tightly connected, thus in first end and the second end electrical isolation airtightly of described moving component.Described insulating part can be elastic insulation pieces or described insulating part can be the insulating part of ripple struction.In addition, described moving component can be the insulated tension pole of vacuum circuit-breaker.
Above to invention has been detailed introduction; for one of ordinary skill in the art; according to the thought of the embodiment of the present invention; change in specific embodiments and applications should not thought and deviate from the scope of protection of the invention; any distortion in claims 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 (8)
1. the insulation system for moving component, this moving component is contained in insulation shell also movable between at least two positions, described moving component comprises charged first end, 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 by this first end and the insulation of the second end, it is characterized in that, also comprise stretchable insulating part, the inner circumferential side of this insulating part connects 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 second end are kept apart airtightly, 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 second end is connected with the operating mechanism of vacuum circuit-breaker, described insulating part is annular shape, its inner circumferential side is connected airtightly with the outer peripheral face of the insulated part of described insulated tension pole, and its outer circumferential side and described insulation burrel are tightly connected, described insulation burrel comprises step part, the outer circumferential side of described insulating part is pressed on described step part by dead ring.
2. insulation system as claimed in claim 1, it is characterized in that, described stretchable insulating part is made up of elastic insulating material.
3. insulation system as claimed in claim 2, it is characterized in that, described elastic insulating material is silicon rubber.
4. insulation system as claimed in claim 1, it is characterized in that, described stretchable insulating part has bellows-like structure.
5. a vacuum circuit-breaker, is characterized in that, this vacuum circuit-breaker comprises the insulation system according to any one of Claims 1-4.
6. one kind is carried out the method for electric insulation to moving component, this moving component is contained in insulation shell also movable between at least two positions, described moving component comprises the second end of the charged first end ground connection relative with this first end and is arranged on the insulated part this first end and the second end insulated between this first end and the second end, and described method comprises:
First step: stretchable insulating part is provided;
Second step: the inner circumferential side of described insulating part is airtight connected on the periphery of described insulated part; And
Third step: be airtight connected to by the outer circumferential side of described insulating part on described insulation shell, to keep apart described first end and described second end airtightly;
Described third step comprises provides dead ring, is pressed onto in the step step of described insulation shell by the outer circumferential side of described insulating part by dead ring.
7. method as claimed in claim 6, it is characterized in that, described second step and third step can be put upside down.
8. method as claimed in claims 6 or 7, it 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 CN103165337A (en) | 2013-06-19 |
| CN103165337B true 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201151A1 (en) * | 2018-01-25 | 2019-07-25 | Siemens Aktiengesellschaft | Electrical switching device |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29717616U1 (en) * | 1997-10-02 | 1997-11-20 | Aeg Sachsenwerk Gmbh, 93055 Regensburg | Gas-insulated vacuum switch |
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2011
- 2011-12-16 CN CN201110424860.4A patent/CN103165337B/en active Active
Patent Citations (4)
| 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 |
| 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 |
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| CN103165337A (en) | 2013-06-19 |
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