CN202102814U - Porcelain insulator for preventing insulated conductor breakage caused by lightning stroke - Google Patents
Porcelain insulator for preventing insulated conductor breakage caused by lightning stroke Download PDFInfo
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Abstract
本实用新型公开了一种用于防止绝缘导线雷击断线的瓷绝缘子,属于防雷装置领域。本实用新型通过瓷绝缘子采用在绝缘导线固定点适当剥开绝缘层,加装了金属线夹以承受工频续流,来避免烧伤绝缘导线,还设置了引弧放电间隙,当雷击发生时,使工频续流借助防护罩引弧口将工频续流疏导到设置在下安装座底部的引弧板,通过绝缘子安装架释放到大地,从而达到避免烧断绝缘导线和烧伤绝缘子的目的。另外,安装了绝缘防护罩以提高供电可靠性及防止绝缘导线线芯进水,安装了绝缘护套增加绝缘子干弧距离,以提高绝缘子绝缘水平。
The utility model discloses a porcelain insulator for preventing insulated wires from being broken by lightning, and belongs to the field of lightning protection devices. The utility model uses the porcelain insulator to properly peel off the insulating layer at the fixed point of the insulated wire, and installs a metal wire clip to withstand the continuous flow of the power frequency to avoid burning the insulated wire, and also sets the arc discharge gap, when the lightning strike occurs, The power frequency continuous flow is guided to the arc strike plate at the bottom of the lower mounting base by means of the arc strike opening of the protective cover, and released to the ground through the insulator mounting frame, so as to avoid burning the insulated wire and burning the insulator. In addition, an insulating protective cover is installed to improve the reliability of power supply and prevent water from entering the insulated wire core, and an insulating sheath is installed to increase the dry arc distance of the insulator to improve the insulation level of the insulator.
Description
技术领域 technical field
本实用新型涉及防雷装置领域,特别涉及一种用于防止绝缘导线雷击断线的瓷绝缘子。The utility model relates to the field of lightning protection devices, in particular to a porcelain insulator used to prevent insulated wires from being broken by lightning.
背景技术 Background technique
为了减少树木、鸟类、积雪等外部原因引起架空配电线路故障,提高供电可靠性。国外发达国家从60年代后期已逐渐采用架空绝缘导线,在日本,架空配电线路已基本实现绝缘化。我国从80年代也开始对城市架空配电网实施绝缘化改造试点,从90年代加快了步伐,特别是近年来城网、农网改造工程大量采用绝缘的线路。绝缘导线解决了裸导线存在的一系列不安全问题,但是,雷击断电问题十分突出。In order to reduce the failure of overhead distribution lines caused by external factors such as trees, birds, and snow accumulation, and improve the reliability of power supply. Overseas developed countries have gradually adopted overhead insulated conductors since the late 1960s. In Japan, overhead distribution lines have basically been insulated. Since the 1980s, my country has also begun to implement insulation transformation pilot projects for urban overhead distribution networks, and has accelerated the pace since the 1990s. Especially in recent years, a large number of insulated lines have been used in urban and rural power grid renovation projects. Insulated wires solve a series of unsafe problems existing in bare wires, but the problem of power failure due to lightning strikes is very prominent.
目前,10kv城市架空电力线路中使用的绝缘导线固定处不剥开绝缘层。当绝缘导线绝缘层遭受直击雷或雷击穿后形成相间短路,工频续流持续通过因击穿形成的针孔通道处燃烧,最终导致绝缘导线烧断,从而造成绝缘导线掉线事故。At present, the insulation layer is not peeled off at the fixed part of the insulated wire used in the 10kv urban overhead power line. When the insulating layer of the insulated wire is directly struck by lightning or struck by lightning, a phase-to-phase short circuit is formed, and the power frequency continuous current continues to burn through the pinhole channel formed by the breakdown, which eventually causes the insulated wire to burn out, resulting in an accident in which the insulated wire is disconnected.
经济发达国家采用架空绝缘导线输配电的时间较长,累积了大量经验。为了降低日益高涨的雷击断电事故率,先后采用了不少预防措施和方法,具体如下:Economically developed countries have used overhead insulated conductors for power transmission and distribution for a long time and have accumulated a lot of experience. In order to reduce the ever-increasing rate of lightning outage accidents, many preventive measures and methods have been adopted, as follows:
(1)架空避雷器(1) Overhead arrester
在空旷地区,同杆架设架空避雷线以对付配电架空绝缘线路工频续流,这是一种投资较大的传统方法。但是,由于配电线路设计的绝缘水平较低,雷击架空避雷线后非常容易造成反击闪络,仍然会引发工频续流烧断绝缘导线。故该方法国外目前较少采用。In open areas, it is a traditional method with a large investment to erect overhead lightning conductors on the same pole to deal with power frequency freewheeling of power distribution overhead insulated lines. However, due to the low insulation level of the distribution line design, it is very easy to cause a flashover after lightning strikes the overhead lightning conductor, and it will still cause power frequency freewheeling to burn the insulated conductor. Therefore, this method is rarely used abroad.
(2)氧化锌避雷器(2) Zinc oxide arrester
人们利用氧化锌避雷器非线性电阻特性和快速阻断工频续流的特性,广泛应用于线路以限制雷电工频续流,起保护范围有限,基本上只能够保护本杆设备。日本、美国、加拿大等国家投入巨资对线路进行改造。在每基电杆上安装三只(相)氧化锌避雷器后,雷击断电率由原来的93.3%降低到2.7%,基本没有再发生雷击断线事故。无间隙氧化锌型避雷器用于线路防雷时,避雷器与绝缘导线直接连接,这是电站型避雷器技术的延续,具有吸收冲击能量可靠,无放电时延等优点。People use the nonlinear resistance characteristics of zinc oxide arresters and the characteristics of quickly blocking power-frequency freewheeling, and are widely used in lines to limit lightning power-frequency freewheeling. The protection range is limited, and basically it can only protect the pole equipment. Japan, the United States, Canada and other countries have invested huge sums of money to transform the lines. After installing three (phase) zinc oxide arresters on each base pole, the power failure rate due to lightning strikes was reduced from 93.3% to 2.7%, and almost no lightning strike disconnection accidents occurred. When the gapless zinc oxide arrester is used for line lightning protection, the arrester is directly connected to the insulated wire. This is the continuation of the power station arrester technology, which has the advantages of reliable impact energy absorption and no discharge delay.
在实现本实用新型的过程中,发明人发现现有技术至少存在以下问题:In the process of realizing the utility model, the inventor finds that the prior art has at least the following problems:
由于配电线路设计的绝缘水平较低,雷击架空避雷线后非常容易造成反击闪络,仍然会引发工频续流烧断绝缘导线。无间隙避雷器长期由于承受工频电压的作用,还要间歇的承受雷电过电压及工频续流的作用,避雷器容易老化,因此避雷器事故很多。由于避雷器与绝缘导线直接连接,当避雷器发生事故时,可能会影响线路的正常供电。Due to the low insulation level of the distribution line design, it is very easy to cause a flashover after lightning strikes the overhead lightning conductor, and it will still cause power frequency freewheeling to burn the insulated conductor. Since the gapless arrester has been subjected to power frequency voltage for a long time, it also has to withstand the effects of lightning overvoltage and power frequency continuous current intermittently. The arrester is easy to age, so there are many accidents in the arrester. Since the arrester is directly connected to the insulated wire, when an accident occurs to the arrester, it may affect the normal power supply of the line.
实用新型内容 Utility model content
为了解决当绝缘导线绝缘层遭受直击雷或雷击穿后形成相间短路,工频续流持续通过因击穿形成的针孔通道处燃烧,最终导致绝缘导线烧断,从而造成绝缘导线掉线事故的问题,本实用新型实施例提供了一种用于防止绝缘导线雷击断线的瓷绝缘子。所述技术方案如下:In order to solve the phase-to-phase short circuit formed when the insulating layer of the insulated wire is directly struck by lightning or struck by lightning, the power frequency continuous current continues to burn through the pinhole channel formed by the breakdown, which will eventually cause the insulated wire to burn, thereby causing the insulated wire to drop the accident To solve the problem, the embodiment of the utility model provides a porcelain insulator for preventing lightning breakage of insulated wires. Described technical scheme is as follows:
一种用于防止绝缘导线雷击断线的瓷绝缘子,所述瓷绝缘子包括:绝缘子本体、上附件、下附件、金属线夹、绝缘导线、引弧板、防护罩、引弧口、绝缘护套;其中,所述绝缘子本体的上端固定有所述上附件,所述绝缘子本体的下端固定有所述下附件,所述上附件的顶部设有金属线夹,所述金属线夹内设有所述绝缘导线,所述下附件的上部设有所述绝缘护套,所述下附件的底部固定有所述引弧板,所述引弧板与所述绝缘导线交叉设置,所述上附件外套设有所述防护罩,所述金属线夹位于所述防护罩内,所述防护罩内对应于所述引弧板引弧端的位置设有所述引弧口。A porcelain insulator for preventing insulated wires from being disconnected by lightning, the porcelain insulator comprising: an insulator body, an upper attachment, a lower attachment, a metal wire clamp, an insulated wire, an arc strike plate, a protective cover, an arc strike opening, and an insulating sheath ; Wherein, the upper end of the insulator body is fixed with the upper attachment, the lower end of the insulator body is fixed with the lower attachment, the top of the upper attachment is provided with a metal wire clamp, and the metal wire clamp is provided with the The above insulated wire, the upper part of the lower accessory is provided with the insulating sheath, the bottom of the lower accessory is fixed with the arc strike plate, the arc strike plate is arranged crosswise with the insulated conductor, and the upper accessory jacket The protective cover is provided, the metal wire clip is located in the protective cover, and the arc starting port is provided in the protective cover corresponding to the arc starting end of the arc starting plate.
进一步地,所述绝缘导线在位于所述金属线夹内的局部为裸线,裸线外包覆有铝包带。Further, the part of the insulated wire located inside the metal clamp is a bare wire, and the bare wire is covered with an aluminum tape.
进一步地,所述引弧板与所述绝缘导线的交叉角度为90度。Further, the intersection angle between the arc striker and the insulated wire is 90 degrees.
本实用新型实施例提供的技术方案的有益效果是:本实用新型设置了引弧放电间隙,当雷击发生时,使工频续流借助防护罩引弧口将工频续流疏导到设置在下安装座底部的引弧板,通过绝缘子安装架释放到大地,从而达到避免烧断绝缘导线和烧伤绝缘子的目的,安装了绝缘子防护罩以提高供电可靠性及防止绝缘导线线芯进水,并且安装了绝缘护套,以提高绝缘子绝缘水平。The beneficial effect of the technical solution provided by the embodiment of the utility model is: the utility model is provided with an arc striking discharge gap, and when a lightning strike occurs, the power frequency continuous flow is guided to the lower installation by means of the arc strike port of the protective cover. The arc strike plate at the bottom of the seat is released to the ground through the insulator mounting frame, so as to avoid burning the insulated wire and the insulator. The insulator protective cover is installed to improve the reliability of power supply and prevent the core of the insulated wire from entering water. Insulation sheath to improve the insulation level of insulators.
附图说明 Description of drawings
为了更清楚地说明本实用新型实施例的技术方案,下面将对实施例中使用的附图作简单地介绍,显而易见地,下面所列附图仅仅是本实用新型的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings listed below are only some embodiments of the present invention. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.
图1是本实用新型实施例提供的一种用于防止绝缘导线雷击断线的瓷绝缘子的结构示意图。Fig. 1 is a schematic structural diagram of a porcelain insulator used to prevent insulated wires from being disconnected by lightning according to an embodiment of the present invention.
附图1中,各标号所代表的组件列表如下:In accompanying drawing 1, the components list represented by each label is as follows:
1绝缘子本体;2上附件;3下附件;4金属线夹;5绝缘导线;6引弧板;7防护罩;8引弧口;9绝缘护套。1. Insulator body; 2. Upper accessories; 3. Lower accessories; 4. Metal wire clips; 5. Insulated wires;
具体实施方式 Detailed ways
为使本实用新型的目的、技术方案和优点更加清楚,下面将结合附图对本实用新型实施方式作进一步地详细描述。In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.
实施例:Example:
如图1所示,一种用于防止绝缘导线雷击断线的瓷绝缘子,包括绝缘子本体1,绝缘子本体1的上端固定有上附件2,绝缘子本体1的下端固定有下附件3,上附件2的顶部设有金属线夹4,金属线夹4内设有绝缘导线5,绝缘导线5位于金属线夹的局部为裸线,裸线外包覆有铝包带,下附件3的上部设有绝缘护套9,下附件3的底部固定有引弧板6,引弧板6与绝缘导线5交叉角度为90度设置,上附件2外罩设有防护罩7,金属线夹4位于防护罩7内,防护罩7对应于引弧板6引弧端的位置设有引弧口8。As shown in Figure 1, a porcelain insulator used to prevent insulated wires from being disconnected by lightning, including an insulator body 1, an upper attachment 2 is fixed on the upper end of the insulator body 1, a
其中,绝缘子本体1的直径为125mm,长为280mm。Wherein, the insulator body 1 has a diameter of 125mm and a length of 280mm.
上述提供的瓷绝缘子,当雷击发生时,起弧位置不会在绝缘导线处而是在金属附件处即引弧口,使工频续流借助防护罩引弧口将工频续流疏导到设置在下安装座底部的引弧板,通过绝缘子安装架释放到大地,从而达到避免烧断绝缘导线和烧伤绝缘子的目的。For the porcelain insulator provided above, when a lightning strike occurs, the arcing position will not be at the insulated wire but at the metal attachment, that is, the arcing port, so that the power frequency continuous current can be guided to the setting by means of the protective cover arcing port. The arc striking plate at the bottom of the lower mounting base is released to the ground through the insulator mounting frame, so as to avoid burning the insulated wire and burning the insulator.
一种用于防止绝缘导线雷击断线的瓷绝缘子,其安装方法为:A porcelain insulator used to prevent insulated wires from being disconnected by lightning, the installation method of which is as follows:
(1)首先将固定在金属线夹4部分的绝缘导线5剥开,并用铝包带包好;(1) First peel off the insulated wire 5 fixed on the metal wire clamp 4, and wrap it with aluminum tape;
(2)将绝缘导线5剥开后并将包好的部分正确安装于金属线夹4中。金属线夹4的压板向下压紧绝缘导线5,并在左右六角螺母上同时施力,直至拧紧为止;(2) Strip the insulated wire 5 and install the wrapped part in the metal wire clip 4 correctly. The pressing plate of the metal wire clamp 4 presses the insulated wire 5 downward, and exerts force on the left and right hex nuts at the same time until it is tightened;
(3)上述安装组件安装并拧紧后,再罩上绝缘防护罩7;(3) After the above installation components are installed and tightened, cover the insulating
(4)调整好引弧放电间隙(即引弧电极),同时绝缘防护罩7的引弧口8与引弧电极相一致(同一直线上),使之与绝缘导线5成90°的夹角。(4) Adjust the arc discharge gap (that is, the arc electrode), and at the same time, the arc opening 8 of the insulating
本实用新型采用在绝缘导线5固定点适当剥开绝缘层,加装了金属线夹4以承受工频续流,来避免烧伤绝缘导线,还设置了引弧放电间隙,使工频续流不烧伤绝缘子,从而大大减少了雷击断线事故;另外,安装了绝缘防护罩7以提高供电可靠性及防止绝缘导线线芯进水,安装了绝缘护套9,以提高绝缘子绝缘水平。In the utility model, the insulation layer is properly peeled off at the fixed point of the insulated wire 5, and the metal wire clamp 4 is added to withstand the continuous flow of power frequency to avoid burning the insulated wire, and an arc discharge gap is also set to prevent the continuous flow of power frequency. Burn the insulator, thereby greatly reducing lightning strike disconnection accidents; In addition, an insulating
以上所述仅为本实用新型的较佳实施例,并不用以限制本实用新型,凡在本实用新型的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本实用新型的保护范围之内。The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102592756A (en) * | 2012-03-30 | 2012-07-18 | 上海市电力公司 | Lightningproof composite post insulator |
CN102610337A (en) * | 2012-03-30 | 2012-07-25 | 上海市电力公司 | Improved lightning protection post insulator |
CN113674939A (en) * | 2021-01-26 | 2021-11-19 | 青岛鼎信通讯股份有限公司 | 10kV lightning arrester with medium-voltage carrier communication capacitive coupler function |
-
2011
- 2011-06-30 CN CN2011202266425U patent/CN202102814U/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102592756A (en) * | 2012-03-30 | 2012-07-18 | 上海市电力公司 | Lightningproof composite post insulator |
CN102610337A (en) * | 2012-03-30 | 2012-07-25 | 上海市电力公司 | Improved lightning protection post insulator |
CN113674939A (en) * | 2021-01-26 | 2021-11-19 | 青岛鼎信通讯股份有限公司 | 10kV lightning arrester with medium-voltage carrier communication capacitive coupler function |
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Owner name: BAODING TANGBEI ELECTRICAL PROCELAIN ELECTRICAL AP Free format text: FORMER NAME: BAODING TANGBEI ELECTRICAL PROCELAIN ELECTRICAL APPLIANCES LTD. |
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Address after: Xinshi District North Zhang Cun East 071051 Baoding city in Hebei Province Patentee after: Baoding North China Electric Porcelain and Limited by Share Ltd Address before: Xinshi District North Zhang Cun East 071051 Baoding city in Hebei Province Patentee before: BAODING TANGBEI ELECTRICAL PROCELAIN ELECTRICAL APPLIANCES CO., LTD. |
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Granted publication date: 20120104 |