WO2008061446A1 - A hang-type composite insulator - Google Patents

A hang-type composite insulator Download PDF

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Publication number
WO2008061446A1
WO2008061446A1 PCT/CN2007/003271 CN2007003271W WO2008061446A1 WO 2008061446 A1 WO2008061446 A1 WO 2008061446A1 CN 2007003271 W CN2007003271 W CN 2007003271W WO 2008061446 A1 WO2008061446 A1 WO 2008061446A1
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WO
WIPO (PCT)
Prior art keywords
mandrel
composite insulator
cone
sleeve
core rod
Prior art date
Application number
PCT/CN2007/003271
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English (en)
French (fr)
Inventor
Xuewen Xie
Original Assignee
Guangzhou Times Rubber & Plastic Enterprise Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangzhou Times Rubber & Plastic Enterprise Co., Ltd. filed Critical Guangzhou Times Rubber & Plastic Enterprise Co., Ltd.
Priority to EP07845658.9A priority Critical patent/EP2117013B1/en
Publication of WO2008061446A1 publication Critical patent/WO2008061446A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/02—Suspension insulators; Strain insulators
    • H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator

Definitions

  • the present invention relates to a composite insulator for use in a power line or an electrified railway line, and more particularly to a suspension composite insulator. '
  • the insulator is generally made of an insulator material with a very high resistance. Its function is to separate the conductors with different potentials so that no current flows between the conductors, so that the current can flow in a certain direction.
  • domestic and overseas suspension insulators are classified into ceramic insulators, glass insulators, and composite insulators. Ceramic and glass insulators are brittle and susceptible to contamination, which can easily cause high-voltage flashover and frying bottle cracking.
  • the common rod-shaped composite insulator has poor flexural flexibility and brittle fracture. At present, the use of organic composite materials is widely promoted at home and abroad.
  • the insulators produced are also called composite insulators.
  • the end attachment of the composite insulator is the connection and fixing part of the composite insulator and the power transmission line and the electric pole. It not only bears various external forces in the system, but also the pressure generated by the wire itself. In the long-term use, it also bears the wind and product in the uncertain direction. The pressure of the snow, so the quality of the connection between the end attachment and the mandrel is an important sign directly related to the safety and reliability of the operation of the product.
  • the connection between the mandrel and the end attachment produced by the usual crimping assembly process is prone to occur. It is brittle, easy to loose, aging, and has poor stability, and has potential safety hazards. It is a major problem in the domestic and international composite insulator technology.
  • the object of the present invention is to provide a suspension type which has good anti-staining property, anti-folding property, anti-brittle property, high joint strength, good stability, aging resistance, safety and durability in view of the above problems and deficiencies.
  • Composite insulator which has good anti-staining property, anti-folding property, anti-brittle property, high joint strength, good stability, aging resistance, safety and durability in view of the above problems and deficiencies.
  • a suspension composite insulator comprising a core rod, an umbrella skirt disposed outside the core rod, and an end assembly disposed at both ends of the core rod, wherein the core rod is made of oriented glass fiber as a reinforcing main material, and then passed through a soft An insulating rubber material or a flexible plastic is bonded as a binder to the bar.
  • the umbrella skirt is made of a polymer insulating material, and the high molecular insulating material may be a polymer insulating material such as silicone rubber, EPDM rubber or soft plastic.
  • the shed skirt can be integrally molded on the mandrel or sleeved on the mandrel.
  • the end assembly comprises a tapered sleeve, a flared cone insertable into the inner ends of the mandrel, a lock nut and a connecting member, wherein: the flared cone is substantially a cone, and the cone head is provided with a retaining piece
  • the chamfer sleeve is a tubular member, and the inner diameter of the small diameter end of the cone sleeve is consistent with the diameter of the mandrel or the interference fit, and the inner hole of the large diameter end of the cone sleeve is arranged in a bell mouth shape, and the bell mouth is formed on the wall of the bell mouth.
  • the inner ring has an inner ring, and the outer ring of the large diameter end is provided with a convex step; one end of the inner hole of the lock nut is provided with an internal thread, and a concave step corresponding to the convex step is arranged in the hole;
  • the external thread is screwed to the internal thread, and the other end is in the shape of a ball or a ball or a ring to facilitate the connection; in order to make the end assembly and the mandrel more stable, on the end assembly
  • a pressure equalizing ring is also provided.
  • the mandrel of the invention is made of oriented glass fiber as a reinforcing main material, and then bonded into a bar by a soft insulating rubber material or a flexible plastic as a binder, so that the insulator has softness and reliable joint strength, and has good anti-staining property. , portability, no bending breakage or wind sag fatigue fracture during transportation and use, effectively avoiding the occurrence of high-pressure flashover or frying bottle crushing accident, improving the service life cycle of the product;
  • the structural form of the end assembly adopts the conical flare connection technology to make the connection strength between the end assembly and the mandrel higher than that of the conventional crimping technology, and the core rod is not easily loosened from the end assembly when the insulator is used.
  • the diameter of the flexible mandrel of the present invention can be determined according to the tensile load of the product; the length of the suspension composite insulator, the number and shape of the umbrella sleeve, the type of the end assembly according to the pollution resistance level and the use characteristics
  • the invention can meet the requirements of various insulation grades and strength grades; it is superior to the existing string insulators or rod composite insulators in terms of service life, safety and reliability.
  • Figure 1 is a schematic view showing the structure of the umbrella skirt sleeve of the present invention attached to the mandrel;
  • FIG. 2 is a schematic structural view of the umbrella skirt of the present invention integrally molded on a mandrel;
  • Figure 3 is a partial cross-sectional view of the insulator of the present invention.
  • Figure 4 is an exploded perspective view of the present invention
  • Figure 5 is a partial cross-sectional view showing a pressure equalizing ring of the present invention.
  • FIG. 6 is an exploded perspective view of the pressure equalizing ring of the present invention.
  • a suspension composite insulator includes a core rod 1, an umbrella skirt 2 disposed outside the core rod 1, and an assembly 3 disposed at both ends of the core rod 1.
  • the core rod 1 is reinforced by oriented glass fibers.
  • the main material is then bonded to the bar by a soft insulating rubber material or a flexible plastic as a binder.
  • the umbrella skirt 2 is made of polymer insulation material, and the polymer insulation material can be silicone rubber, EPDM rubber or soft plastic material.
  • the umbrella skirt 2 has the function of protecting the mandrel, increasing the creepage distance and resisting pollution. , can be made into various shapes according to the pressure resistance and stain resistance level, the connection manner of the umbrella skirt 2 and the mandrel 1 : as shown in FIG. 1 , the umbrella skirt sleeve 2 is sleeved on the mandrel 1 ;
  • the umbrella skirt 2 is integrally molded on the mandrel 1.
  • the taper sleeve 4, the flared cone 5, the lock nut 6 and the connecting member 7 constitute an end assembly 3, wherein the taper sleeve 4 is a tubular member, and the inner diameter of the small diameter end thereof is Mandrel 1 has the same diameter or interference fit, large diameter
  • the inner hole of the end is arranged in a bell mouth shape, the inner wall of the bell mouth shaped hole is provided, and the outer ring of the large diameter end is provided with a convex step 41;
  • the inner hole of the lock nut 6 is provided with a concave step 61, and is provided at one end of the inner hole
  • the connecting member 7 is provided with an external thread 71 screwed with the internal thread 62;
  • the taper sleeve 4 When assembling, first, the taper sleeve 4 is placed on the lock nut 6 so that the convex step 41 of the taper sleeve 4 abuts against the concave step 61 of the lock nut 6, and then the mandrel 1 of the umbrella skirt 2 is sheathed. Inserting from the small diameter end of the taper sleeve 4 until a certain distance is left, inserting the flared cone 5 into the mandrel 1 along the axial direction of the mandrel 1 to expand the mandrel 1 and then pulling the mandrel 1 in the reverse direction.
  • the expansion portion of the mandrel 1 is pressed against the bellows-shaped inner hole wall, and the internal teeth provided on the bell mouth-shaped hole wall can effectively increase the friction coefficient, and then screwed into the lock nut 6 through the connecting member 7 to be pressed.
  • the connecting member 7 can adopt various shapes. As shown in Fig. 1, the end portion of the connecting member 7 has a ball-shaped shape, as shown in Fig. 2, the end portion The shape is a ball-and-socket shape, as shown in Fig. 5, the end shape is a hanging ring shape.
  • a pressure equalizing ring 8 is also provided on the end assembly 3, as shown in Fig. 5-6.

Description

一种悬式复合绝缘子
本发明所属技术领域
本发明涉及一种用于电力线路或者电气化铁道线路的复合绝缘子， 特别是 一种悬式复合绝缘子。 '
在本发明之前的现有
绝缘子一般由电阻极高的绝缘子材料制成， 它的作用是把电位不相同的导 体分隔开， 不让导体之间有电流通过， 使电流能按一定的方向流通。 目前， 国 内外悬式绝缘子分为陶瓷绝缘子、 玻璃绝缘子、 复合绝缘子。 陶瓷和玻璃绝缘 子易脆裂， 易受污染， 容易造成高压闪络和炸瓶碎裂事故； 普通棒形复合绝缘 子的芯棒抗折挠性差、 易脆裂， 目前国内外大力推广使用有机复合材料制造的 绝缘子， 又叫复合绝缘子。
复合绝缘子的端部附件是复合绝缘子与输电线、 电线杆的连接固定部分， 不仅要承受系统内的各种外力、 导线自身产生的压力， 在长期使用过程中还要 承受不定方向的风力和积雪的压力， 因此端部附件与芯棒的连接质量是直接关 系到产品运行的安全性和可靠性的重要标志， 采用通常压接式装配工艺生产的 芯棒与端部附件连接技术， 容易发生脆裂、 易松脱、 老化， 且稳定性差， 存在 安全隐患， 是当前国内外复合绝缘子技术中的一大难题。
发明目的
本发明的目的在于针对以上存在的问题和不足， 提供一种具有良好的抗污 性、 抗折挠性、 防脆裂性， 且连接强度高、 稳定性好、 不易老化， 安全耐用的 悬式复合绝缘子。
本发明翻的脉方案 本发明的技术方案是这样实现的：
一种悬式复合绝缘子， 包括芯棒、 设于芯棒外的伞裙套及设于芯棒两端部 的端部组件， 其中， 芯棒由定向玻璃纤维作增强主体材料， 再通过柔软的绝缘 橡胶材料或者柔性塑料作粘合剂粘结成棒料。
为了提高伞裙套的耐压和耐污性能， 伞裙套采用高分子绝缘材料制成， 高 分子绝缘材料可为硅橡胶、 三元乙丙橡胶或软性塑料等高分子绝缘材料。 伞裙 套可整体模塑在芯棒上或套接在芯棒上。
端部组件包括锥口套、 可插嵌入芯棒两端内部的扩口锥体、 锁紧螺母和连 接件， 其中： 扩口锥体大体上为圆锥体， 其圆锥体头部设有防脱倒角； 锥口套为管 形件， 锥口套的小径端的内孔与芯棒直径一致或过盈配合， 锥口套的大径端的 内孔设置为喇叭口形， 且喇叭口形的孔壁上设有内齿， 大径端的外圆环设有凸 台阶； 锁紧螺母内孔的一端设有内螺紋， 并于孔内设有与凸台阶相配合的凹台阶； 连接件一侧端设有与内螺紋相旋合的外螺紋， 另一侧端采用球头状或球窝状或 吊环状， 以方便连接固定； 为使端部组件与芯棒连接更为稳定， 在端部组件上 还套设有均压环。
本发明芯棒由定向玻璃纤维作增强主体材料， 再通过柔软的绝缘橡胶材料 或者柔性塑料作粘合剂粘结成棒料， 使绝缘子具有柔软性和可靠的连接强度， 具有良好的抗污性、 轻便性， 在运输和使用中不会发生弯曲断裂或者风摆疲劳 断裂， 有效避免了高压闪络或炸瓶碎裂事故的发生， 提高了产品的使用寿命周 期； 又由于本发明采用了上述端部组件的结构形式， 采用该锥体扩口连接技术 使得端部组件和芯棒的连接强度高于常规的压接技术的连接强度， 绝缘子使用 时芯棒不易从端部组件内松脱， 不会出现应力疲劳或工艺缺陷造成的断裂或风 _摆疲劳断裂现象； 本发明柔性芯棒直径的大小可根据产品的拉伸载荷大小决定； 悬式复合绝缘子的长度、 伞套的数量和形状、 端部组件的类型根据抗污染等级 和使用特点决定； 本发明可以满足各种绝缘等级和强度等级的使用要求； 在使 用寿命、 安全可靠性等方面均优于现有的串式绝缘子或棒式复合绝缘子。
下面结合附图对本发明作进一步的说明。
附图说明
图 1为本发明伞裙套套接在芯棒上的结构示意图；
图 2为本发明伞裙套整体模塑在芯棒上的结构示意图；
图 3为本发明绝缘子部分剖示图；
图 4为本发明分解示意图；
图 5为本发明带均压环的部分剖示图；
图 6为本发明带均压环的分解示意图。 如图所示， 一种悬式复合绝缘子， 包括芯棒 1、 设于芯棒 1外的伞裙套 2及设 于芯棒 1两端部的组件 3， 芯棒 1由定向玻璃纤维作增强主体材料， 再通过柔软的 绝缘橡胶材料或者柔性塑料作粘合剂粘结成棒料。
伞裙套 2采用高分子绝缘材料制成， 高分子绝缘材料可为硅橡胶、 三元乙丙 橡胶或柔软塑料等材料， 伞裙套 2具有保护芯棒、 增大爬距、 抵抗污染的作用， 可以根据耐压和耐污等级制成各种形状， 伞裙套 2与芯棒 1的连接方式： 如图 1所 示， 伞裙套 2套接在芯棒 1上； 如图 2所示， 伞裙套 2整体模塑在芯棒 1上。
如图 3- 4所示， 锥口套 4、 扩口锥体 5、 锁紧螺母 6和连接件 7构成端部组件 3， 其中， 锥口套 4为管形件， 其小径端的内孔与芯棒 1直径一致或过盈配合， 大径 端的内孔设置为喇叭口形， 喇叭口形的孔壁上设有内齿， 大径端的外圆环设有 凸台阶 41 ; 锁紧螺母 6内孔设有凹台阶 61， 并于内孔一端设有内螺紋 62; 连接件 7上设有与内螺紋 62相旋合的外螺纹 71；
装配时， 首先， 将锥口套 4穿置锁紧螺母 6， 使锥口套 4的凸台阶 41与锁紧螺 母 6的凹台阶 61相抵合， 然后将套有伞裙套 2的芯棒 1从锥口套 4的小径端穿入， 直至留出一定距离， 再将扩口锥体 5沿芯棒 1的轴向插嵌入芯棒 1内使芯棒 1膨胀， 再逆向拉动芯棒 1， 使芯棒 1的膨胀部分压紧于喇叭口形内孔壁上， 喇叭口形孔 壁上设有的内齿可有效增加摩擦系数， 再通过连接件 7旋进锁紧螺母 6中压紧。
为方便连接件 7与输电线、 电线杆等连接固定， 连接件 7可采用多种形状， 如图 1所示， 连接件 7的端部形状为球头状， 如图 2所示， 端部形状为球窝状， 如 图 5所示， 端部形状为吊环状。
为使端部组件 3与芯棒 1连接更为稳定， 在端部组件 3上还套设有均压环 8， 如图 5-6所示。
尽管本发明是参照具体实施例来描述， 但这种描述并不意味着对本发明构 成限制。 参照本发明的描述， 所公开的实施例的其它变化， 如果对于本领域技 术人员都是可以预料的， 那么， 这样的变化应属于本权利要求所限定的范围及 精神之内。

Claims

权 利 要 求
1. 一种悬式复合绝缘子，包括芯棒（1 )、设于芯棒（1 )外的伞裙套（2) 及设于芯棒（1 ) 两端部的端部组件（3)， 其特征在于： 所述芯棒（1 ) 由定向 玻璃纤维作增强主体材料， 再通过柔软的绝缘橡胶材料或者柔性塑料作粘合剂 粘结成棒料； 所述端部组件 （3) 包括锥口套（4)、 可插嵌入芯棒 （1 ) 两端内 部的扩口锥体 (5)及锁紧螺母 (6)和连餅（7)， 其中：
扩口锥体 (5)大体上为圆锥体， 其圆锥体头部设有防脱倒角；
锥口套（4)为管形件，其小径端的内孔与芯棒.（1 )直径一致或过盈配合， 其大 径端的内孔设置为喇叭口形， 且喇叭口形的孔壁上设有内齿， 锥口套（4)大径端的夕卜 圆环设有凸台阶 (41 )；
锁紧螺母 (6) 内孔的一端设有内螺纹 （62)， 并于孔内设有与凸台阶（41 ) 相 配合的凹台阶（61 );
连接件 (7) 的一侧端设有与内螺紋 （62) 相旋合的外螺纹 （71 )。
2. 根据权利要求 1所述的悬式复合绝缘子， 其特征在于： 所述锥口套（4) 的小径端的外圆套设有端部均压环 （8)。
3. 根据权利要求 1或 2所述的悬式复合绝缘子，其特征在于：所述连接件（7) 的另^ «端设置为球头状或 ¾^状或吊环^。
？. 根据权利要求 1或 2所述的悬式复合绝缘子，其特征在于：所述伞裙套（2) 由高分子绝缘材料制成。
5. 根据权利要求 4所述的悬式复合绝缘子， 其特征在于： 所述伞裙套 （2) 通过注塑的方法整体模塑在芯棒 （1 ) 上。
6. 根据权利要求 4所述的悬式复合绝缘子，其特征在于：所述伞裙套（2) 套接在芯棒 （1) 上。
PCT/CN2007/003271 2006-11-24 2007-11-20 A hang-type composite insulator WO2008061446A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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CN200610123727.4 2006-11-24
CNB2006101237274A CN100481276C (zh) 2006-11-24 2006-11-24 一种悬式复合绝缘子

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EP2117013A1 (en) 2009-11-11
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CN100481276C (zh) 2009-04-22
EP2117013A4 (en) 2013-05-01

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