WO2019242350A1 - 一种法兰和绝缘子及绝缘支柱 - Google Patents

一种法兰和绝缘子及绝缘支柱 Download PDF

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Publication number
WO2019242350A1
WO2019242350A1 PCT/CN2019/078755 CN2019078755W WO2019242350A1 WO 2019242350 A1 WO2019242350 A1 WO 2019242350A1 CN 2019078755 W CN2019078755 W CN 2019078755W WO 2019242350 A1 WO2019242350 A1 WO 2019242350A1
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WIPO (PCT)
Prior art keywords
flange
groove
inflation valve
insulator
boss
Prior art date
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PCT/CN2019/078755
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English (en)
French (fr)
Inventor
马斌
刘超
方江
倪桂炎
周曙琛
蔡薛军
Original Assignee
江苏神马电力股份有限公司
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.)
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Publication date
Application filed by 江苏神马电力股份有限公司 filed Critical 江苏神马电力股份有限公司
Priority to EP19822168.1A priority Critical patent/EP3813083B1/en
Priority to BR112020023572-5A priority patent/BR112020023572A2/pt
Priority to RU2020136502A priority patent/RU2773743C2/ru
Priority to US17/055,084 priority patent/US11915842B2/en
Publication of WO2019242350A1 publication Critical patent/WO2019242350A1/zh

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    • 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
    • H01B17/38—Fittings, e.g. caps; Fastenings therefor
    • 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
    • H01B17/36—Insulators having evacuated or gas-filled spaces
    • 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
    • H01B17/14—Supporting insulators

Definitions

  • the invention relates to the field of transmission and transformation insulation equipment, in particular to a flange, an insulator and an insulating pillar.
  • Composite pillar insulators used in power equipment are mostly large-diameter composite insulators.
  • Composite pillar insulators include hollow composite insulating tubes and insulating materials filled in the insulating tubes to meet the electrical and mechanical properties of power equipment.
  • Existing insulation material filling generally includes solid filling and gas filling.
  • Gas filling is generally filled with pure dry nitrogen in a hollow insulating tube.
  • threaded holes are usually provided on the flanges at both ends of the hollow insulating tube, and the inflation valve is threadedly connected to the threaded hole.
  • the inflation valve connected to the flange will protrude outside the outer end surface of the flange and is easily damaged by external forces during transportation and operation.
  • one of the objectives of the present invention is to provide a flange.
  • the flange of the flange is provided with a groove for placing an inflation valve, which helps to protect the inflation valve from external forces.
  • the groove is filled with sealing material to ensure the sealing performance of the inflation valve area.
  • the technical solution adopted by the present invention is as follows: a flange connected to an end of an insulating pipe, the flange including a flange plate abutting on the end of the insulating pipe, and the flange plate is provided with an insulating pipe; An internal recessed groove is in communication with the insulation tube. An inflation valve is arranged in the groove. The groove is filled with a sealing material, and the sealing material covers the inflation valve.
  • the flange of the above-mentioned flange is provided with a recess recessed into the insulating tube, and an inflation valve is arranged in the recess to prevent the inflation valve from protruding outside the flange and to protect the flange from being bumped.
  • a sealing material is arranged in the groove, and the sealing material covers the inflation valve, which helps to ensure the sealing performance of the flange.
  • the filling surface of the sealing material is flush with the outer end surface of the flange.
  • the filling surface of the sealing material is flush with the outer end surface of the flange, which makes it difficult for rainwater to accumulate in the groove and to prevent water vapor from penetrating into the insulating tube.
  • the flange is provided with a first boss near the end surface of the insulating tube, and the groove is provided in the first boss. Further, the groove is disposed coaxially with the first boss.
  • a first boss is provided on the flange, and a groove is provided in the first boss, so that the inflation valve is firmly connected to the flange while reducing the thickness of the flange, saving consumables and reducing costs.
  • the groove is a step hole, and the inflation valve is connected to the step hole.
  • the inflation valve includes a fastening nut, and the fastening nut abuts the step surface.
  • the groove is in the shape of a step hole, which is convenient for connecting the inflation valve with the groove.
  • a sealing ring is arranged in the fastening nut, and the fastening nut is in contact with the step surface to ensure the sealing performance of the connection.
  • the step hole has a first step surface near the outer end surface of the flange and a second step surface far from the outer end surface of the flange, and the inflation valve is in contact with the second step surface.
  • the step hole is provided with two step surfaces to facilitate the fixed connection of the inflation valve and the step hole.
  • the stepped surface is provided with a second boss, and the fastening nut is in contact with the boss surface of the second boss.
  • the fastening nut is abutted on the boss surface of the second boss, and even if there is water infiltration, it will flow down along the second boss, and it is not easy to accumulate on the second boss, and avoid water vapor passing through the connection between the inflation valve and the groove Infiltrated into the insulation tube.
  • the sealing material is rubber.
  • Another object of the present invention is to provide an insulator including the above-mentioned flange.
  • the insulator provided with the flange is convenient for filling and detecting the insulating gas, and also makes the inflation valve of the insulator less prone to damage and prolongs the service life.
  • the technical solution adopted by the present invention is as follows: an insulator, the insulator including the above-mentioned flange.
  • a third object of the present invention is to provide an insulating pillar.
  • An insulating pillar includes two insulators connected end to end, and the insulator is the aforementioned insulator.
  • the above-mentioned insulator's end flange has no inflation valve protruding toward the outer end surface of the flange, which facilitates the connection between the insulator's end flanges.
  • FIG. 1 is a longitudinal sectional structural schematic view of a flange 100 mounted on an insulator in Embodiment 1 of the present invention
  • FIG. 2 is a schematic enlarged view of A in FIG. 1.
  • FIG. 3 is a longitudinal sectional structural diagram of a flange 200 mounted on an insulator in a second embodiment of the present invention
  • FIG. 4 is a schematic enlarged view of B in FIG. 3.
  • FIG. 5 is a longitudinal sectional structural schematic view of a flange 300 mounted on an insulator in a third embodiment of the present invention.
  • FIG. 6 is an enlarged structure diagram of C in FIG. 5.
  • Embodiment 1 of the flange of the present invention is a first embodiment of the flange of the present invention.
  • the insulator of this embodiment includes an insulating pipe 10 and a flange 100 connected to an upper end of the insulating pipe 10 in a vertical direction.
  • the flange 100 includes a flange 110 abutting on an end of the insulating tube 10.
  • the flange 110 is provided with a recess 111 recessed into the interior of the insulating tube, and the recess 111 communicates with the insulating tube 10.
  • An inflation valve 120 is disposed in the groove 111.
  • the groove is filled with a sealing material 130 that covers the inflation valve 120.
  • the flange 110 of the flange 100 is provided with a recess 111 recessed into the insulating tube 10, and an inflation valve 120 is provided in the recess 111 to prevent the inflation valve 120 from protruding outside the flange 100 and to protect the inflation valve 120 from being damaged. collision.
  • the groove 111 is filled with a sealing material 130 that covers the inflation valve 120 and helps to ensure the sealing performance of the flange 100.
  • the filling surface 131 of the sealing material 130 is flush with the outer end surface 140 of the flange 110.
  • the flange 100 is disposed at an upper end portion of the insulator in the vertical direction, and an end surface of the flange plate 110 away from the insulation tube 10 is an outer end surface 140.
  • An end of the inflation valve 120 near the outer end surface 140 is an inflation port 121 for filling gas into the insulating tube 10.
  • the inflation valve 120 is disposed inside the groove 111, that is, the inflation port 121 is lower than the outer end surface 140 in the vertical direction.
  • the gap between the groove 111 and the inflation valve 120 is filled with a sealing material 130.
  • the sealing material 130 completely covers the inflation valve 120 in the groove 111, so that there is no gap in the groove 111.
  • the filling surface 131 of the sealing material 130 is flush with the outer end surface 140 of the flange 110.
  • the filling surface 131 of the sealing material 130 is flush with the outer end surface 140 of the flange 110, so that the outer end surface 140 of the flange 110 is flat and free of depressions.
  • the accumulation of rainwater on the outer end surface 140 is avoided, and the sealing performance of the flange 100 is improved.
  • the flange with the inflation valve may be provided at the lower end of the insulator.
  • the filling surface of the sealing material may be flush with the outer end surface of the flange, or may be uneven. level.
  • the sealing material is rubber.
  • the sealing material 130 is a room temperature vulcanized silicone rubber.
  • Room temperature vulcanized silicone rubber has good heat resistance, cold resistance, and dielectric properties, and is suitable for filling in the groove 111 as a sealing material, which can ensure the sealing effect of the flange 100.
  • the sealing material may also be other types of sealing materials, such as polyurethane, or other types of silicone rubber or rubber materials, such as liquid vulcanized silicone rubber, etc., and details are not described herein again.
  • a first boss 112 is disposed on an end surface of the flange plate 110 near the insulating tube 10, and a groove 111 is disposed in the first boss 112.
  • the groove 111 is provided in the first boss 112, and the groove 111 is coaxially provided with the first boss 112.
  • the groove 111 communicates with the insulating tube 10 through the first boss 112, and the inflation valve 120 is connected to the first boss 112.
  • a first boss 112 is provided on the flange 110, and a groove 111 is provided in the first boss 112 and is coaxial with the first boss 112. While the inflation valve 120 is firmly connected to the flange 110, the thickness of the flange 110 is reduced, consumables are saved, and costs are reduced.
  • the first boss may not be disposed coaxially with the groove, as long as the groove is communicated with the interior of the insulating tube through the first boss.
  • the flange can also be provided with a sufficient thickness to directly place the inflation valve without setting a first boss, which will not be repeated here.
  • the groove 111 is a stepped hole, and the inflation valve 120 is connected to the stepped hole 111.
  • the inflation valve 120 includes a fastening nut 123, which is in contact with the step surface.
  • the groove 111 is a step hole 111, and the fastening nut 123 is in abutment with the step surface to ensure the connection reliability and connection sealing of the inflation valve 120.
  • the step hole 111 has a first step surface 113 near the outer end surface 140 of the flange 110 and a second step surface 114 far from the outer end surface 140 of the flange 110.
  • the inflation valve 120 is in contact with the second step surface 114. .
  • the step hole 111 is provided at the center of the first boss 112 and is disposed coaxially with the first boss 112.
  • the end of the inflation valve 120 away from the outer end surface 140 is a connection end 122.
  • the connection end 122 is connected to the groove 111, that is, the connection end 122 is connected to the step hole 111.
  • the fastening nut 123 abuts on the second stepped surface 114.
  • a sealing ring (not shown in the figure) is provided in a surface where the fastening nut 123 is in contact with the second stepped surface 114.
  • the inflation valve 120 is threadedly connected to the groove 111.
  • the groove 111 is a stepped hole 111. Cooperating threads are provided outside the connecting end 122 and inside the step hole 111, and the connecting end 122 and the groove 111 are fastened by screwing.
  • the inflation valve and the groove may also be connected by glue or crimping, etc., and are not limited to threaded connections, which are not repeated here.
  • Embodiment 2 of the flange of the present invention is a diagrammatic representation of the flange of the present invention.
  • the structure of the flange 200 in this embodiment is similar to that of the flange 100 in the first embodiment of the flange.
  • the structural similarities are not repeated here.
  • the difference is that in this embodiment, the flange 200 is disposed at the lower end portion of the insulator in the vertical direction, and the filling surface 231 of the sealing material 230 is not flush with the outer end surface 212 of the flange 210 of the flange 200.
  • the sealing material 230 is filled in the groove 211, and the sealing material 230 completely covers the inflation valve 220.
  • the filling surface 231 is lower than the outer end surface 212 of the flange 210.
  • a flange provided with an inflation valve may be installed at both ends of the insulator.
  • the filling surfaces of flanges at different ends can be set to different heights based on the position of the flange.
  • Embodiment 3 of the flange of the present invention is a diagrammatic representation of Embodiment 3 of the flange of the present invention.
  • the flange 300 in this embodiment is similar in structure to the flange 100 in the first embodiment of the flange. The same points are not repeated here. The difference is that the stepped surface 312 of the stepped hole 311 in this embodiment is provided with a second boss 330, and the fastening nut 321 abuts the boss surface 331.
  • the step surface 312 is provided with a second boss 330, and the fastening nut 321 is in contact with the boss surface 331. Even if rainwater infiltrates, rainwater cannot accumulate on the second boss 330, and will naturally flow down.
  • the provision of the second boss 330 can effectively prevent rainwater from entering the abutment between the fastening nut 321 and the boss surface 331, thereby ensuring that no water can enter the insulation tube 30, and improving the sealing reliability of the flange 300.
  • the groove 311 is a stepped hole 311, and a stepped surface 312 of the stepped hole 311 is provided with a second boss 330.
  • the second boss 330 is disposed coaxially with the step hole 311.
  • the second boss 330 communicates with the step hole 311.
  • the fastening nut 321 of the inflation valve 320 is in contact with the boss surface 331, and a seal ring (not shown in the figure) is provided in the surface where the fastening nut 321 is in contact with the boss surface 331.
  • Embodiment 1 of the insulator of the present invention is a diagrammatic representation of the insulator of the present invention.
  • the insulator of this embodiment includes the flange described in any one of the above-mentioned flange embodiments.
  • the insulator provided with the flange is convenient for filling and detecting the insulating gas, and also makes the inflation valve of the insulator less prone to damage and prolongs the service life.
  • the flange described in the first embodiment is provided at both ends of the insulator in this embodiment.
  • both ends of the insulator may be provided with the flange described in any of the above-mentioned flange embodiments, or only one end of the insulator may be provided with any of the above-mentioned flange embodiments. Of the flange.
  • Embodiment 1 of the insulating pillar of the present invention is a first embodiment of the insulating pillar of the present invention.
  • the insulating pillar of this embodiment includes two insulators connected end to end.
  • the insulator is the insulator described in the first embodiment of the insulator.
  • the above-mentioned insulator's end flange has no inflation valve protruding toward the outer end surface of the flange, which facilitates the connection between the insulator's end flanges.

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Abstract

一种法兰（100），连接于绝缘管（10）的端部，该法兰包括抵接在绝缘管端部的法兰盘（110），法兰盘上设置向绝缘管内部凹陷的凹槽（111），凹槽与绝缘管连通，凹槽内设置充气阀（120），凹槽内填充密封材料（130），密封材料覆盖充气阀。还涉及一种使用该法兰的绝缘子及绝缘支柱。该法兰和绝缘子及绝缘支柱，有助于保护充气阀不受外力破坏，同时凹槽内填充密封材料，保证法兰的密封性能。

Description

一种法兰和绝缘子及绝缘支柱 技术领域
本发明涉及输、变电绝缘设备领域，具体是一种法兰和绝缘子及绝缘支柱。
背景技术
随着复合绝缘子的发展与应用，电力设备中使用的支柱绝缘子多为大直径复合绝缘子。复合支柱绝缘子包括空心复合绝缘管和填充在绝缘管内的绝缘物质，以满足电力设备的电气性能和机械性能。现有的绝缘物质填充一般包括固体填充和气体填充。气体填充一般是在空心绝缘管内填充纯净干燥氮气。
为了便于在空心绝缘管内填充气体，通常在空心绝缘管两端的法兰上设置螺纹孔，充气阀螺纹连接于螺纹孔。连接于法兰的充气阀会凸出在法兰的外端面外侧，容易在运输及运行过程中受到外力破坏。
发明内容
针对现有技术的不足，本发明的目的之一是提供一种法兰，该法兰的法兰盘上设有放置充气阀的凹槽，有助于保护充气阀不受外力破坏。同时凹槽内填充密封材料，保证充气阀区域的密封性能。
为实现上述目的，本发明所采用的技术方案如下：一种法兰，连接于绝缘管的端部，法兰包括抵接在绝缘管端部的法兰盘，法兰盘上设置向绝缘管内部凹陷的凹槽，凹槽与绝缘管连通，凹槽内设置充气阀，凹槽内填充密封材料，密封材料覆盖充气阀。
上述法兰的法兰盘上设置向绝缘管内凹陷的凹槽，凹槽内设置充气阀，避免充气阀凸出在法兰外面，保护法兰不会被碰撞。凹槽内设置密封材料，该密封材料覆盖充气阀，有助于保证法兰的密封性能。
其中，密封材料的填充面与法兰盘的外端面齐平。
上述密封材料的填充面与法兰盘的外端面齐平，使得凹槽内不易积累雨水，避免绝缘管内渗透水汽。
其中，法兰盘靠近绝缘管的端面设置第一凸台，上述凹槽设置在第一凸台内。进一步地，凹槽与第一凸台同轴设置。
在法兰盘上设置第一凸台，将凹槽设置在第一凸台内，使得充气阀稳固连接在法兰盘的同时，减少法兰厚度，节约耗材，降低成本。
其中，凹槽为台阶孔，充气阀与台阶孔连接，充气阀包括紧固螺母，紧固螺母与台阶面抵接。
凹槽呈台阶孔状，便于充气阀与凹槽连接。紧固螺母内设置有密封圈，将紧固螺母与台阶面抵接，保证连接密封性能。
其中，台阶孔具有靠近法兰盘外端面的第一台阶面和远离法兰盘外端面的第二台阶面，充气阀与第二台阶面抵接。
台阶孔设置有两个台阶面，便于充气阀与台阶孔的固定连接。
其中，台阶面上设有第二凸台，紧固螺母与第二凸台的凸台面抵接。
将紧固螺母抵接在第二凸台的凸台面上，即使有水渗入也会顺着第二凸台流下，不易在第二凸台上堆积，避免水汽通过充气阀与凹槽的连接处渗入绝缘管内。
其中，密封材料为橡胶。
本发明的目的之二是提供一种绝缘子，该绝缘子包括上述法兰。设置有上述法兰的绝缘子便于绝缘气体的充入与检测，也使得绝缘子的充气阀不易受损，延长使用寿命。
为实现上述目的，本发明所采用的技术方案如下：一种绝缘子，该绝缘子包括上述的法兰。
本发明的目的之三是提供一种绝缘支柱。
为实现上述目的，本发明所采用的技术方案如下：一种绝缘支柱，包括首尾连接的两个绝缘子，绝缘子为上述的绝缘子。上述绝缘子的端部法兰没有向法兰外端面凸出的充气阀，便于绝缘子端部法兰之间的连接。
附图说明
图1是本发明实施例一中法兰100安装在绝缘子上的纵向剖视结构示意图；
图2是图1中A的放大结构示意图。
图3是本发明实施例二中法兰200安装在绝缘子上的纵向剖视结构示意图；
图4是图3中B的放大结构示意图。
图5是本发明实施例三中法兰300安装在绝缘子上的纵向剖视结构示意图；
图6是图5中C的放大结构示意图。
具体实施方式
根据要求，这里将披露本发明的具体实施方式。然而，应当理解的是，这里所披露的实施方式仅仅是本发明的典型例子而已，其可体现为各种形式。因此，这里披露的具体细节不被认为是限制性的，而仅仅是作为权利要求的基础以及作为用于教导本领域技术人员以实际中任何恰当的方式不同地应用本发明的代表性的基础，包括采用这里所披露的各种特征并结合这里可能没有明确披露的特征。
本发明法兰实施例一：
如图1和图2所示，本实施例的绝缘子，包括绝缘管10，和连接于绝缘管10竖直方向上端部的法兰100。法兰100包括抵接在绝缘管10端部的法兰盘110。法兰盘110上设置向绝缘管内部凹陷的凹槽111，凹槽111与绝缘管10连通。凹槽111内设置充气阀120。凹槽内填充密封材料130，密封材料130覆盖充气阀120。
上述法兰100的法兰盘110上设置向绝缘管10内凹陷的凹槽111，凹槽111内设置充气阀120，避免充气阀120凸出在法兰100外部，保护充气阀120不会被碰撞。凹槽111内填充密封材料130，该密封材料130覆盖充气阀120，有助于保证法兰100的密封性能。
其中，密封材料130的填充面131与法兰盘110的外端面140齐平。
本实施例中，法兰100设置在绝缘子沿竖直方向的上端部，法兰盘110远离绝缘管10的一端面为外端面140。充气阀120靠近外端面140的一端为充气口121，用于向绝缘管10内充入气体。充气阀120设置在凹槽111 内部，即充气口121在竖直方向上低于外端面140。
凹槽111与充气阀120的间隙填充密封材料130，密封材料130将充气阀120完全覆盖在凹槽111内，使得凹槽111内没有空隙。密封材料130的填充面131与法兰盘110的外端面140齐平。
当带有充气阀120的法兰100设置在绝缘子的上端部，将密封材料130的填充面131与法兰盘110的外端面140齐平，使得法兰盘110的外端面140平整无凹陷，避免雨水在外端面140的堆积渗透，提高法兰100的密封性能。
需要说明的是，在其他实施例中，带有充气阀的法兰也可以设置在绝缘子的下端部，此时，密封材料的填充面可以与法兰盘的外端面齐平，也可以不齐平。
其中，密封材料为橡胶。
本实施例中，密封材料130为室温硫化硅橡胶。室温硫化硅橡胶具有良好的耐热性、耐寒性和介电性能，适合作为密封材料填充在凹槽111内，能够保证法兰100的密封效果。
需要说明的是，在其他实施例中，密封材料也可以采用其他类型的密封材料，如聚氨酯，或采用其他类型的硅橡胶或橡胶材料，如液体硫化硅橡胶等，在此不再赘述。
其中，法兰盘110靠近绝缘管10的端面上设置第一凸台112，凹槽111设置在第一凸台112内。
本实施例中，凹槽111设置在第一凸台112内，凹槽111与第一凸台112同轴设置。凹槽111通过第一凸台112与绝缘管10连通，充气阀120与第一凸台112连接。
在法兰盘110上设置第一凸台112，凹槽111设置在第一凸台112内，并与第一凸台112同轴设置。使得充气阀120稳固连接在法兰盘110的同时，减少法兰盘110的厚度，节约耗材，降低成本。
需要说明的是，在其他实施例中，第一凸台也可以不与凹槽同轴设置，只要保证凹槽通过第一凸台与绝缘管内部连通即可。或法兰盘也可以设置足够的厚度，直接放置充气阀，不用设置第一凸台，在此不再赘述。
其中，凹槽111为台阶孔，充气阀120与台阶孔111连接，充气阀120 包括紧固螺母123，紧固螺母123与台阶面抵接。
凹槽111即为台阶孔111，紧固螺母123与台阶面密封抵接，保证充气阀120连接的可靠性和连接密封性。
本实施例中，台阶孔111具有靠近法兰盘110外端面140的第一台阶面113和远离法兰盘110外端面140的第二台阶面114，充气阀120与第二台阶面114抵接。
具体地，台阶孔111设置在第一凸台112的中心处，与第一凸台112同轴设置。充气阀120远离外端面140的一端为连接端122，连接端122与凹槽111连接，即连接端122与台阶孔111连接。紧固螺母123抵接在第二台阶面114上。紧固螺母123与第二台阶面114抵接的面内设置密封圈(图中未示出)。
其中，充气阀120与凹槽111螺纹连接。
本实施例中，凹槽111即为台阶孔111。连接端122外和台阶孔111内设置相互配合的螺纹，连接端122与凹槽111通过螺纹连接紧固。
需要说明的是，在其他实施例中，充气阀与凹槽也可以采用胶接或者压接等连接方式，不限于螺纹连接，在此不再赘述。
本发明法兰实施例二：
如图3和图4所示，本实施例的法兰200与法兰实施例一中的法兰100的结构相似。结构相同之处在此不再赘述。不同之处在于，本实施例中法兰200设置在绝缘子沿竖直方向的下端部，密封材料230的填充面231与法兰200的法兰盘210的外端面212不齐平。
当法兰200设置在绝缘子下端部时，因重力原因，雨水无法在凹槽211内堆积，因此填充面231可以不与法兰盘210的外端面212齐平，进而节约材料，降低成本。
本实施例中，密封材料230填充在凹槽211内，密封材料230将充气阀220完全覆盖。填充面231低于法兰盘210的外端面212。
需要说明的是，在其他实施例中，绝缘子的两端均可以安装设置有充气阀的法兰。不同端部的法兰的填充面可以根据法兰的位置设置不同的填充面的高度。
本发明法兰实施例三：
如图5和图6所示，本实施例的法兰300与法兰实施例一中的法兰100结构相似。相同之处在此不再赘述。不同之处在于，本实施例中的台阶孔311的台阶面312上设置有第二凸台330，紧固螺母321与凸台面331抵接。
台阶面312上设置第二凸台330，紧固螺母321与凸台面331抵接。即使有雨水渗入，雨水也无法在第二凸台330上堆积，会自然流下。设置第二凸台330能够有效避免雨水进入紧固螺母321与凸台面331的抵接处，从而保证绝缘管30内不会有水进入，提高法兰300的密封可靠性。
本实施例中，凹槽311为台阶孔311，台阶孔311的台阶面312上设置第二凸台330。第二凸台330与台阶孔311同轴设置。第二凸台330与台阶孔311连通。充气阀320的紧固螺母321与凸台面331抵接，紧固螺母321与凸台面331抵接的面内设置密封圈(图中未示出)。
本发明绝缘子实施例一：
本实施例的绝缘子，包括上述法兰实施例中任一实施例所述的法兰。
设置有上述法兰的绝缘子便于绝缘气体的充入与检测，也使得绝缘子的充气阀不易受损，延长使用寿命。
具体地，本实施例中绝缘子两端均设置法兰实施例中一所述的法兰。
需要说明的是，在其他实施例中，绝缘子两端可以设置上述法兰实施例中任一实施例所述的法兰，也可以绝缘子只有一端设置上述法兰实施例中任一实施例所述的法兰。
本发明绝缘支柱实施例一：
本实施例的绝缘支柱，包括首尾连接的两个绝缘子，绝缘子为上述绝缘子实施例一中所述的绝缘子。
上述绝缘子的端部法兰没有向法兰外端面凸出的充气阀，便于绝缘子端部法兰之间的连接。
本发明的技术内容及技术特点已揭示如上，然而可以理解，在本发明的创作思想下，本领域的技术人员可以对上述结构和材料作各种变化和改进，包括这里单独披露或要求保护的技术特征的组合，明显地包括这些特征的其它组合。这些变形和/或组合均落入本发明所涉及的技术领域内，并落入本发明权利要求的保护范围。

Claims (9)

  1. 一种法兰，连接于绝缘管的端部，其特征在于：所述法兰包括抵接在所述绝缘管端部的法兰盘，所述法兰盘上设置向所述绝缘管内部凹陷的凹槽，所述凹槽与所述绝缘管连通，所述凹槽内设置充气阀，所述凹槽内填充密封材料，所述密封材料覆盖所述充气阀。
  2. 如权利要求1所述的法兰，其特征在于：所述密封材料的填充面与所述法兰盘的外端面齐平。
  3. 如权利要求1所述的法兰，其特征在于：所述法兰盘靠近所述绝缘管的端面设置第一凸台，所述凹槽设置在所述第一凸台内。
  4. 如权利要求3所述的法兰，其特征在于：所述凹槽与所述第一凸台同轴设置。
  5. 如权利要求1所述的法兰，其特征在于：所述凹槽为台阶孔，所述充气阀与所述台阶孔连接，所述充气阀包括紧固螺母，所述台阶孔具有靠近所述法兰盘外端面的第一台阶面和远离所述法兰盘外端面的第二台阶面，所述紧固螺母与所述第二台阶面抵接。
  6. 如权利要求1所述的法兰，其特征在于：所述凹槽为台阶孔，所述充气阀与所述台阶孔连接，所述充气阀包括紧固螺母，所述台阶孔内设有第二凸台，所述紧固螺母与所述第二凸台的凸台面抵接。
  7. 如权利要求1所述的法兰，其特征在于：所述密封材料为橡胶。
  8. 一种绝缘子，其特征在于：所述绝缘子包括如权利要求1-7任一项所述的法兰。
  9. 一种绝缘支柱，其特征在于：包括首尾连接的两个绝缘子，所述绝缘子为权利要求8所述的绝缘子。
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