WO2005024855A1 - Isolateur creux compose et son procede de fabrication - Google Patents

Isolateur creux compose et son procede de fabrication Download PDF

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Publication number
WO2005024855A1
WO2005024855A1 PCT/CN2004/000672 CN2004000672W WO2005024855A1 WO 2005024855 A1 WO2005024855 A1 WO 2005024855A1 CN 2004000672 W CN2004000672 W CN 2004000672W WO 2005024855 A1 WO2005024855 A1 WO 2005024855A1
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Prior art keywords
rubber
injection machine
manufacturing
mold
composite hollow
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PCT/CN2004/000672
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English (en)
French (fr)
Inventor
Bin Ma
Original Assignee
Bin Ma
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Application filed by Bin Ma filed Critical Bin Ma
Priority to JP2006525605A priority Critical patent/JP4549346B2/ja
Priority to US10/570,994 priority patent/US7728230B2/en
Priority to EP04738270.0A priority patent/EP1667175B1/en
Priority to ES04738270T priority patent/ES2407682T3/es
Publication of WO2005024855A1 publication Critical patent/WO2005024855A1/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
    • H01B17/32—Single insulators consisting of two or more dissimilar insulating bodies
    • H01B17/325—Single insulators consisting of two or more dissimilar insulating bodies comprising a fibre-reinforced insulating core member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49227—Insulator making

Definitions

  • the invention relates to a composite hollow insulator and a production method thereof.
  • the composite hollow insulator is applied to a high-voltage power station in the power industry.
  • the insulator consists of an end connector, an insulation cylinder and an umbrella body. Background technique
  • porcelain hollow insulators were commonly used in power transmission and transformation equipment used in the power industry.
  • porcelain-broad insulator insulator shields are heavy, bulky, explosive and broken, and need to be cleaned regularly, which brings a lot of inconvenience to installation and maintenance.
  • the umbrella material is room temperature vulcanized silicone rubber.
  • RTY is casted piece by piece on special equipment with a single-ring mold.
  • the second is that the umbrella material is injection molded using liquid silicone rubber (LSR) at a medium temperature (120 ° C) with a two-component injection pump.
  • LSR liquid silicone rubber
  • the disadvantage of these two manufacturing technologies is that the product's external insulation has poor electrical corrosion resistance and aging resistance, and its technical and economical properties are poor. '
  • the high-temperature vulcanized silicone rubber has very good weathering resistance and electrical corrosion resistance, but because it is a solid state, high-temperature and high-pressure methods are required to manufacture the product, and the insulating cylinder of the hollow insulator is hollow. It is very easy to break, especially at high temperature, so it has not been used in the technical field of manufacturing hollow insulators used in high-voltage power stations. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a composite hollow insulator.
  • this composite hollow insulator is applied to the harshest natural environment, the disadvantages of life aging and cracking are not easy to occur, which greatly prolongs its service life and reduces maintenance. Workload to ensure the safe operation of the power system.
  • the present invention aims to provide a method for producing a composite hollow insulator, so that the manufacturing process is simple and controllable, and the yield is high.
  • the present invention adopts the following technical solutions:
  • a composite hollow insulator is composed of an end connector, an insulating cylinder and an umbrella body; the insulating cylinder is a hollow cylinder wound with epoxy glass fiber, and the end connectors are fixed at both ends of the insulating cylinder and outside the insulating cylinder.
  • An umbrella body with an integrated structure is provided.
  • the umbrella body is made of high temperature vulcanized silicone rubber
  • the composite hollow insulator of the above structure is manufactured by the following production method: epoxy glass fiber is used to wind the hollow insulation cylinder, and the processed insulation cylinder is placed in the mold cavity of the umbrella rubber injection machine. After the injection machine is locked, The high-temperature vulcanized silicone rubber is injected into the mold cavity through a rubber injection machine. After curing (temperature control is in the range of 150 ° C ⁇ 190 ° C), an umbrella body with an integrated structure integrated with the insulating cylinder is formed; The connecting parts are fixed at both ends of the insulation tube.
  • the rubber injection machine used in this manufacturing method has a heating and pressurizing device, and a corresponding monitoring and control system.
  • the composite hollow insulator manufactured by using the production method disclosed in the present invention has the following advantages:
  • the composite insulation is integral with the umbrella body, without any bonding surface, it is naturally not easy to crack, and the structural strength is high , Good insulation;
  • the combination between the umbrella body and the insulation tube is injected into the mold cavity of the umbrella body in a fluid state after the high temperature vulcanized silicone rubber as the material of the umbrella body is heated, and the insulation tube is evenly surrounded.
  • the insulation tube is integrated into a whole, and the structural strength of the composite hollow insulator is more reliable than the bonding process in the prior art;
  • the heating temperature of the high-temperature vulcanized silicone rubber is controlled in the range of 150 ⁇ ⁇ 19 (TC), so that the internal structure of the umbrella body after vulcanization is more uniform, and the phenomenon that the umbrella body itself may crack due to uneven stress is avoided .
  • FIG. 1 is a schematic diagram of a half-section structure of a composite hollow insulator of the present invention. detailed description
  • the composite hollow insulator of the present invention is composed of an end connector 1, an insulating tube 2, and an umbrella body 3.
  • the insulating tube is a hollow tube wound with epoxy glass fiber
  • the umbrella body 3 is a high-temperature vulcanized silicone rubber HTV material.
  • the high-temperature vulcanized silicone rubber is integrally formed on the outside of the insulating cylinder 2 through a rubber injection machine, and the end connector 1 is fixed to both ends of the insulating cylinder.
  • the life material can include methyl vinyl silicone rubber (20% -50%), white carbon black (20% -60%), aluminum hydroxide (25% -50%), silicone oil (2% -5% ), Vulcanizing agent (1%) and other components of high temperature vulcanized silicone rubber.
  • the vulcanization process can be performed at a temperature of 150-190 ° C and a time of 20-60 minutes, depending on the material and size of the product. Appropriate process technology has greatly improved the electrical and mechanical properties and anti-aging properties of the product.
  • the rubber injection machine used in the present invention is provided with a heating and temperature control device, a pressure and pressure control device on the basis of a general rubber injection machine, and the mold is made after the mold is locked.
  • a heating and temperature control device 150 ° C ⁇ 190 ° C
  • clamping pressure 500t ⁇ 3000t
  • rubber injection pressure 1200 ⁇ 1800bar (MPa).
  • the invention adopts the following manufacturing process:
  • Step 1 Winding and processing hollow insulation cylinders using epoxy glass fiber 2,
  • Step 2 Put the insulating cylinder 1 into the umbrella mold placed in the rubber injection machine, and close the mold;
  • step three the rubber injection machine applies a certain pressure to lock the mold.
  • the cylinder is called “clamping”.
  • step four the injection machine starts to inject the glue, and the integrally formed umbrella body is outside the hollow insulating cylinder 2.
  • step five vulcanization, the temperature is controlled 150-19CTC, the time is 20-60 minutes; step six, open the mold to remove the insulator, trim the flash, and then place it in the hollow insulation cylinder
  • the rubber injection machine used in the present invention is also provided with a cold runner device to ensure that the rubber material is not scorched during the injection process.
  • it is also equipped with a mold evacuation device to evacuate the mold after clamping to avoid air bubbles during the pouring process.
  • the rubber injection machine according to the present invention is also provided with an inner core positioning device for a tightly fitted inner core of the good fixed insulation cylinder 1, and the inner core may be made of steel pipe.
  • the inner core can conduct heat and pressure more uniformly, and can increase the compression capacity of the hollow insulation cylinder 2.
  • the injection machine can be set to multi-point simultaneous injection, the injection points are evenly distributed, using a multiple of two or a multiple of three, evenly distributed around the periphery of the mold.
  • Step 1 Winding and processing hollow insulation cylinder 2 with epoxy glass fiber 2,
  • Step two put the insulation tube 2 into the umbrella mold inside the rubber injection machine, and close the mold and eight.
  • Step three the rubber injection machine is applied with a certain pressure of 2000t, and the mold is locked.
  • step four the injection machine starts to inject, the rubber injection pressure is 1200 bar, and the integrally formed umbrella body is outside the hollow insulation cylinder 2;
  • Step 5 Vulcanize, control the temperature at 170 ° C ⁇ 10 ° C, and keep it for 45 minutes.
  • Step 6 Open the mold and remove the insulator. After trimming, fix the end connectors on both ends of the hollow insulation tube 2. Manufacturing Example 2
  • Umbrella material composition methyl vinyl silicone rubber 40 ° /. , White carbon black 20%, aluminum hydroxide 35%, silicone oil 4%, ⁇ chemical agent 1%.
  • Step 1 Winding and processing hollow insulation cylinder 2 with epoxy glass fiber 2,
  • Step two uniformly coating a layer of adhesive on the outer surface of the insulating cylinder 2 and putting it into a life mold placed in a rubber injection machine, and closing the mold;
  • Step three the rubber injection machine applies a certain pressure of 600t, the mold is locked, and the cylinder is called “clamping”;
  • step four the injection machine starts injection, the injection pressure of the rubber is 1500bar, and the integrated molding umbrella The body is outside the hollow insulation tube 2;
  • Step 5 Vulcanize, control the temperature at 180 ° C ⁇ 5 ° C, and keep it for 35 minutes.
  • Step 6 Open the mold to remove the insulator, and fix and fix the end connector on both ends of the hollow insulation cylinder 2. Manufacturing Example 3
  • Step 1 Winding and processing hollow insulation cylinders using epoxy glass fiber 2,
  • Step 2 Put a tight-fitting steel tube in the middle of the insulation cylinder 1 as the inner core, and then place it in the mold cavity of the rubber injection machine to position and close the mold; Step 3, the rubber injection machine applies a certain pressure 3000t, lock mold;
  • Step four the injection machine starts to inject the glue at three points at the same time, and the injection pressure of the rubber material is 1800 bar, and the integrated umbrella body is outside the hollow insulation cylinder 2;
  • Step 5 Vulcanize, control the temperature at 155 ° C ⁇ 5 ° C, and keep it for 60 minutes.
  • Step 6 Open the mold and remove the insulator. After trimming, fix the end connectors on both ends of the hollow insulation tube 2.

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  • Insulators (AREA)
  • Insulating Bodies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

复合空心绝缘子及其生产方法 技术领域
本发明涉及一种复合空心绝缘子及其生产方法，该复合空心绝缘子 应用于电力行业高压电站中。 该绝缘子由端部连接件、 绝缘筒和伞体组 成。 背景技术
原来， 电力行业使用的输变电设备通常使用瓷质空心绝缘子。 但瓷 廣绝缘子盾量重、 体积大、 易爆炸破碎， 且需定期清理， 给安装及维护 带来诸多不便。
为了克服瓷质绝缘子的上述不足， 便出现了有机合成材料制成的复 合空心绝缘子。
现行的制造技术主要有两种： 一是伞体材料采用室温硫化硅橡胶
( RTY )用单令模具在专用设备上逐片浇注成型； 二是伞体材料采用液态 硅橡胶 ( LSR ) 以双组份注射泵中温 （120 °C )注射成型。 这两种制造技 术的缺点是产品外绝缘耐电蚀性和耐老化性差， 其技术性、 经济性均很 差。 '
' 高温硫化硅橡胶的耐天候老化性能和耐电蚀性能均是非常好的， 但 由于是固体形态， 需要用高温高压的手段来制造产品， 而空心绝缘子的 绝缘筒是空心的， 一受压力非常容易破碎， 尤其在高温时， 故而一直没 有在制造应用于高压电站中的空心绝缘子这一技术领域中得到使用。 发明内容
本发明要解决的技术问题是提供一种复合空心绝缘子， 将这种复合 空心绝缘子应用到最恶劣的自然环境下， 也不容易出现命体老化龟裂的 弊端， 大大延长其使用寿命， 減少维护工作量， 确保电力系统的安全运 行。
同时， 本发明旨在提供一种复合空心绝缘子的生产方法， 使得制造 工艺简单可以控制， 而且成品率高。
为解决上述技术问题， 本发明采取如下技术方案：
1
确 认 本 一种复合空心绝缘子， 由端部连接件、 绝缘筒、 伞体组成； 绝缘筒 为环氧玻璃纤维绕制而成的空心筒， 端部连接件粘固在绝缘筒两端， 在 绝缘筒外部设有一整体结构的伞体。 该伞体材质为高温硫化硅橡胶
( HTV )0
上述结构的复合空心绝缘子采用下述生产方法制造： 采用环氧玻璃 纤维绕制加工空心绝缘筒， 将加工后的绝缘筒置于伞体橡胶注射机的模 具型腔内， 注射机锁模后， 高温硫化硅橡胶经橡胶注射机注入模具型.腔， 经过硫化 (温度控制在 150 °C~190 °C范围）就形成与绝缘筒结合为一体的 整体结构的伞体； 用粘合剂将端部连接件粘固在绝缘筒两端。
该制造方法中使用的橡胶注射机中有加温加压装置， 并有相应的监 测和控制系统。 显而易见， 与现有技术相比， 采用本发明揭示的生产方法制造出来 的复合空心绝缘子， 具有如下优点：
1、 与伞裙之间采用粘合组成为整体的现有复合空心绝缘子相比： 该 复合绝缘于伞体为一个整体， 无任何粘接面， 自然就不容易出现 裂紋的可能， 结构强度高， 绝缘性好；
2、 伞体与绝缘筒之间的结合， 是在作为伞体材料的高温硫化硅橡胶 加热后处于流体状态下， 注入伞体模具型腔， 均匀地将绝缘筒包 围， 冷固后伞体与绝缘筒结合为一个整体， 与现有技术中的粘合 工艺相比， 该复合空心绝缘子的结构强度更为可靠；
3、 由于在橡胶注射过程， 高温硫化硅橡胶加热温度控制在 150 Ό ~19 (TC范围， 从而使硫化后的伞体内部结构更为均匀， 避免伞体 本身因应力不匀可能出现裂紋的现象。
4、 与室温硫化硅橡胶（ RTV )制成的复合空心绝缘子相比： 耐天候老 化性能好， 耐电蚀性能好， 使用寿命长， 且材料成本低， 制造效 率高。
5、 该产品的制造工艺简单可控， 并且成品率非常高。 附图说明
以下结合附图说明本发明的实施过程: 图 1 为本发明复合空心绝缘子的半剖结构示意图。 具体实施方式
参照附图， 本发明复合空心绝缘子由端部连接件 1、 绝缘筒 2、 伞体 3组成， 绝缘筒为环氧玻璃纤维绕制而成的空心筒， 伞体 3为高温硫化硅 橡胶 HTV材质， 采用高温硫化硅橡胶经橡胶注射机一体成型在绝缘筒 2 外部， 端部连接件 1粘固在绝缘筒两端。
命体材质可以是包括有甲基乙烯基硅橡胶（ 20%- 50% )和白炭黑（ 20% 一 60% )、 氢氧化铝 （25%— 50% )、 硅油 （2%— 5% )、 硫化剂 （1% )等组分 的高温硫化硅橡胶。
硫化工艺可以根据产品的材料和尺寸的大小， 分别采用温度为 150-190 °C , 时间为 20- 60分钟的方法。 合适的 u化工艺， 大大提高了产 品的电性能和力学性能， 及抗老化性能。
为了更好地控制产品质量和提高成品率，本发明采用的橡胶注射机在 一般橡胶注射机的基础上， 设置有加温和温控装置、 加压和压控装置， 在锁模后使模具始终保持在一定的温度范围内， 同时可以准确地检测和 控制如下经过大量试验获的优良参数， 模具温度： 150°C~190°C , 锁模压 力： 500t~3000t , 胶料注射压力： 1200~1800bar ( MPa )。
本发明采用如下制造工艺：
步骤一， 采用环氧玻璃纤维绕制加工空心绝缘筒 2,
步骤二，将绝缘筒 1放入置于橡胶注射机内的伞体模具中，并合上模 具；
步骤三， 橡胶注射机施加一定的压力， 锁定模具， 筒称 "锁模"； 步骤四， 注射机开始注胶， 一体化成型伞体在空心绝缘筒 2外面； 步骤五， 硫化， 温度控制在 150- 19CTC , 时间为 20-60分钟； 步骤六， 打开模具取下绝缘子， 进行修整飞边， 然后在空心绝缘筒
(2)的两端粘接固定端部连接件。
同时本发明中使用的橡胶注射机上还设置有冷流道装置，确保胶料在 注射过程中不焦烧。 另外， 还配有模具抽真空装置， 在锁模以后对模具 抽真空， 避免浇注过程中出现气泡.。 本发明所述的橡胶注射机，还设置有一个内芯定位装置，用于 ί艮好的 固定绝缘筒 1 紧配合的内芯， 该内芯可以采用钢管制造。 采用该内芯能 更均匀的传导热和压力， 可以增加空心绝缘筒 2的受压能力。
为了更好地控制绝缘筒 2的受压情况，注射机可以被设置为多点同时 注射， 注射点均匀分布， 采用二的倍数或三的倍数， 围绕模具四周均匀 分布。 制造实施例 1
伞体材质： 高温硫化硅橡胶， 其包括有以下组分： 曱基乙烯基硅橡 胶 25%、 白炭黑 32%、 氢氧化铝 40%、 硅油 2%、 硫化剂 1%。
工艺：
步骤一， 采用环氧玻璃纤维绕制加工空心绝缘筒 2 ,
步骤二，将绝缘筒 2放入置于橡胶注射机内的伞体模具中，并合上模 且八.
步骤三， 橡胶注射机施加一定的压力 2000t , 锁定模具， 筒称 "锁 模，，；
步骤四， 注射机开始注度， 胶料注射压力 1200bar , 一体化成型伞 体在空心绝缘筒 2外面；
步驟五， 硫化， 温度控制在 170 °C ± 10 °C , 并保持 45分钟； 步骤六， 打开模具取下绝缘子， 进行修整后在空心绝缘筒 2的两端 粘接固定端部连接件。 制造实施例 2
伞体材料組份： 甲基乙烯基硅橡胶 40°/。、 白炭黑 20%、 氢氧化铝 35%、 硅油 4%、 υ化剂 1%。
步骤一， 采用环氧玻璃纤维绕制加工空心绝缘筒 2 ,
步骤二， 在绝缘筒 2 的外表面均匀涂覆一层粘结剂后将它放入置于 橡胶注射机内的命体模具中，并合上模具；
步驟三，橡胶注射机施加一定的压力 600t ,锁定模具，筒称 "锁模"； 步骤四， 注射机开始注胶， 胶料注射压力 1500bar , 一体化成型伞 体在空心绝缘筒 2外面；
步骤五， 硫化， 温度控制在 180°C ±5°C, 并保持 35分钟； 步骤六， 打开模具取下绝缘子， 并在空心绝缘筒 2 的两端粘接固定 端部连接件。 制造实施例 3
材料： 甲基乙餘基硅橡胶 30°/。、 白炭黑 40%、氢氧化铝 26%、硅油 、 硫化剂 1°/。。
工艺：
步骤一， 采用环氧玻璃纤维绕制加工空心绝缘筒 2,
步骤二， 在绝缘筒 1中间放入一个紧配合的钢管作为内芯, 然后再 置于橡胶注射机内的模具型腔中，定位，并合上模具； 步骤三， 橡胶注射机施加一定的压力 3000t, 锁定模具；
步驟四， 注射机开始三点同时注胶， 胶料注射压力： 1800bar， 一体 化成型伞体在空心绝缘筒 2的外面；
步骤五， 硫化， 温度控制在 155°C±5°C, 并保持 60分钟； 步骤六， 打开模具取下绝缘子， 修整后在空心绝缘筒 2的两端粘接 固定端部连接件。

Claims

权 利 要 求 、 一种复合空心绝缘子， 由端部连接件 (1)、 绝缘筒（2)和多个大小相 间的伞体 (3)组成, 绝缘筒 (2)为环氧玻璃纤维绕制而成的空心筒, 端部连接件（1)粘固在绝缘筒两端， 其特征在于： 所述的伞体（3 ) 为一整体结构设置在绝缘筒（2)外。 、 根据权利要求 1所述的复合空心绝缘子， 其特征在于： 所述的伞体 材质为高温疏化硅橡胶。 、 根据权利要求 2所述的复合空心绝缘子， 其特征在于： 所述的伞体 为高温硫化硅橡胶一体注射成型。 、 根据权利要求 2所述的复合空心绝缘子， 其特征在于： 所述的伞体 材质高温硫化硅橡胶, 其包括有以下組分组成: 曱基乙烯基硅橡胶 和白炭黑、 氢氧化铝、 硅油、 硫化剂等。 、 根据权利要求 4所述的复合空心绝缘子， 其特征在于： 所述的高温 硫化硅橡胶的组份为： 曱基乙烯基硅橡胶 20%— 50%、 白炭黑 20%— 60%、 氢氧化铝 25%— 50%、 硅油 2%— 5%、 硫化剂 1%。 、 一种制造权利要求 1所述的复合空心绝缘子的方法，包括如下步骤： 步骤一， 采用环氧玻璃纤维绕制加工空心绝缘筒 (2)， 步骤二， 将绝缘筒（2)放入置于橡胶注射机内的伞体模具中，并合上 模具； 步骤三， 橡胶注射机施加一定的压力 , 锁定模具； 步驟四， 注射机开始注胶， 一体化成型伞体在空心绝缘筒（2)外面; 步骤五， 硫化， 温度为 150- 190°C , 时间为 20-60分钟； 步骤六， 打开模具取下绝缘子，修整后在空心绝缘筒（2)的两端粘接 固定端部连接件。 、 根据权利要求 6所述的复合空心绝缘子的制造方法， 其特征在于， 所述方法的步骤一之后还包括如下步骤: 在空心绝缘筒 ( 2 ) 的外 表面涂覆一层粘结剂； 、 根据权利要求 6所述的复合空心绝缘子的制造方法， 其特征在于， 所述方法的步骤二还包括在空心绝缘筒 （2 ) 的内部放置一个紧配 合的内芯。 、 根据权利要求 8所述的复合空心绝缘子的制造方法，其特征在于所 述的内芯是用钢管制成的。0、 根据权利要求 6所述的复合空心绝缘子的制造方法， 其特征在于， 所述方法的步驟四还包括在多个均匀分布的注射点同时开始注胶 并保持空心绝缘筒各点受压均匀。
1、 根据权利要求 6所述的复合空心绝缘子的制造方法， 其特征在于， 所述方法的锁模压力为 500 - 30001 , 胶料注射压力为 1200 - 1800bar o
2、 一种为实施权利要求 6-11所述的制造方法而专门设计的橡胶注射 机， 包含模具锁定装置，其特征在于，在一般橡胶注射机的基础上， 设置有加温和温控装置、 加压和压控装置。
3、 一种如权利要求 11所述的橡胶注射机， 其特征在于， 所述的橡胶 注射机还设置有胶料冷流道装置。
4、 一种如权利要求 11所述的橡胶注射机， 其特征在于， 所述的橡胶 注射机还设置有模具抽真空装置。
5、 一种如权利要求 11所述的橡胶注射机， 其特征在于， 还设置有一 个内芯定位装置。
PCT/CN2004/000672 2003-09-11 2004-06-23 Isolateur creux compose et son procede de fabrication WO2005024855A1 (fr)

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US20070251718A1 (en) 2007-11-01
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