WO2020048462A1 - 法兰连接装置 - Google Patents

法兰连接装置 Download PDF

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Publication number
WO2020048462A1
WO2020048462A1 PCT/CN2019/104250 CN2019104250W WO2020048462A1 WO 2020048462 A1 WO2020048462 A1 WO 2020048462A1 CN 2019104250 W CN2019104250 W CN 2019104250W WO 2020048462 A1 WO2020048462 A1 WO 2020048462A1
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WO
WIPO (PCT)
Prior art keywords
flange
connection
fixed
welding ring
fixed support
Prior art date
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PCT/CN2019/104250
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English (en)
French (fr)
Inventor
姚吉隆
张晟
Original Assignee
西门子（中国）有限公司
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Publication date
Application filed by 西门子（中国）有限公司 filed Critical 西门子（中国）有限公司
Publication of WO2020048462A1 publication Critical patent/WO2020048462A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
    • F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings

Definitions

  • the utility model relates to the technical field of machinery, in particular to a flange connection device.
  • the high-voltage insulation environment formed by the internal insulating gas such as SF 6 and N 2 is one of the key factors to maintain the normal operation of the gas-insulated switch.
  • the reasons for the leakage of the insulation gas inside the gas-insulated switch mainly include: the connection parts in the gas-insulated switch, such as the connection between the equipment and the equipment, the connection between the equipment and the pipeline, and the connection between the pipeline and the pipeline. Leak tightness. Therefore, it is very important to solve the sealing problem of the connection part.
  • a sealed connection method of each connection part in a gas insulated switch is a flange connection.
  • the existing flange connection is directly placed between the two connection flanges through a gasket or a seal ring, and the two flanges are fixed by screws and nuts to achieve sealing. Due to the relatively easy deformation or aging of the gasket or seal, the problem of incomplete sealing occurs, especially for reassembled flange connections, such as disassembling the flange connection for inspection, and reassembling the disassembled flange after inspection is completed The chances of a connection being tightly sealed will greatly increase.
  • the embodiment of the utility model provides a flange connection device, which can enhance the tightness of the flange connection.
  • the embodiment of the utility model provides a flange connection device, which is applied to a gas-insulated switch and includes:
  • the first connection portion is disposed outside the first flange and is perpendicular to a central axis of the first flange;
  • the first reuse welding ring is disposed outside the first flange connection end of the first flange, and the center of the first reuse welding ring is on a central axis of the first flange;
  • the second connection portion is disposed outside the second flange and is perpendicular to a central axis of the second flange;
  • the second reuse welding ring is disposed outside the second flange connection end of the second flange; the center of the second reuse welding ring is on the center axis of the second flange;
  • the first reuse welding ring and the second reuse welding ring are integrally formed by welding; the first connection portion is fixedly connected to the second connection portion.
  • the flange connection device further includes: a gasket,
  • the gasket is matched with the first flange connection end and the second flange connection end, and is placed between the first flange connection end and the second flange connection end;
  • the two pad surfaces of the gasket are in contact with the first flange connection end and the second flange connection end, respectively.
  • the flange connection device further includes: a seal ring;
  • the first flange connection end includes: an annular groove matching the seal ring;
  • the sealing ring is placed in the annular groove and is in contact with the annular groove and the second flange connection end.
  • the first connection portion includes: a first fixed support plate and at least one pair of first fixed connection holes;
  • the second connection portion includes: a second fixed support plate and a second fixed connection hole corresponding to each of the first fixed connection holes;
  • the first fixed support plate is disposed outside the first flange and is perpendicular to the center axis of the first flange.
  • the center of the first fixed support plate is at the center of the first flange. On the axis
  • the second fixed support plate is disposed outside the second flange and is perpendicular to the center axis of the second flange.
  • the center of the second fixed support plate is at the center of the second flange. On the axis
  • Each pair of the first fixed connection holes is disposed on the first fixed support plate
  • Each of the second fixed connection holes is disposed on the second fixed support plate
  • the corresponding first fixed connection hole and the second fixed connection hole are fixedly connected by bolts and nuts.
  • the first connection portion includes at least a pair of first fixed support sub-portions and a third fixed connection hole provided on each of the first fixed support sub-portions;
  • a line connecting the two first fixed support sub-sections passes through a central axis of the first flange
  • the second connection portion includes a second support sub-portion corresponding to each of the first fixed support sub-portions and a fourth fixed connection hole provided on each of the second fixed support sub-portions;
  • One third fixed connection hole corresponding to one fourth fixed connection hole
  • the corresponding third fixed connection hole and the fourth fixed connection hole are fixedly connected by bolts and nuts.
  • the first connection portion is close to the first flange connection end
  • the second connection portion is close to the second flange connection end.
  • a first reused welding ring included in the first flange is matched with a matched first flange.
  • the second reused welding ring included in the two flanges is welded into one body.
  • the first connection portion included in the first flange is fixedly connected to the second connection portion of the matching second flange.
  • the first reuse welding ring and the second reuse welding ring included in the matching second flange are welded into one body, which realizes the welding seal of the flange connection device. Since the welding position is relatively stable, deformation does not generally occur, etc. Problem, can enhance the tightness of the flange connection.
  • FIG. 1 is a schematic cross-sectional view of a flange connection device according to an embodiment of the present invention
  • FIG. 2 is a schematic sectional view of another flange connection device according to an embodiment of the present invention.
  • FIG. 3 is a schematic sectional view of another flange connection device according to an embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional view of a flange provided by an embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view of a flange provided by an embodiment of the present invention.
  • an embodiment of the present invention provides a flange connection device, which is applied to a gas-insulated switch.
  • the first connection part 103 and the first reuse welding ring 104 integrally formed with the blue 101 and the second connection part 105 and the second reuse welding ring 106 integrally formed with the second flange 102;
  • the first connection portion 103 is disposed outside the first flange 101 and is perpendicular to a central axis of the first flange 101;
  • the first reuse welding ring 104 is disposed outside the flange connection end 1011 of the first flange 101, and the first reuse welding ring 104 is centered on the central axis of the first flange 101. ;
  • the second connecting portion 105 is disposed outside the second flange 102 and is perpendicular to a central axis of the second flange 102.
  • the second reuse welding ring 106 is disposed outside the flange connection end 1021 of the second flange 102; the center of the second reuse welding ring 106 is on the center axis of the second flange 102 ;
  • the first reuse welding ring 104 and the second reuse welding ring 106 are welded into one body; the first connection portion 103 and the second connection portion 105 are fixedly connected to achieve a sealed connection.
  • a first reused welding ring included in the first flange and a matched second method are used.
  • the second reused welding ring included in the blue is welded into one body.
  • the first connection portion included in the first flange is fixedly connected to the second connection portion of the matching second flange.
  • a reuse welding ring and the second reuse welding ring included in the matching second flange are welded into one body to achieve the welding seal of the flange connection device. Since the welding position is relatively stable, problems such as deformation do not generally occur. Can enhance the tightness of the flange connection.
  • the flange connection device provided in the foregoing embodiment, all axial forces generated by the internal pressure of the insulating gas in the gas-insulated switch are borne by the first connection portion and the second connection portion, and the flanges of the two flanges
  • the gap between the connection ends is small enough, so the first reuse welding ring and the second reuse welding ring are integrally formed by welding and used only for sealing, and hardly bear pressure. Therefore, the thickness of the reuse welding ring (the first reuse welding ring and the second reuse welding ring) can be very small, and the corresponding welding seam size is also small, that is, the sealing performance of the flange connection can be enhanced.
  • the flange connection device provided by the present utility model is easy to connect and disconnect at a welding position, and is convenient for disassembly and assembly.
  • end surface of the flange connection end 1011 and one side surface of the first reuse welding ring 104 are in the same plane.
  • the utility model provides the following two secondary sealing structures.
  • the flange connection device further includes: a gasket 107, which is matched with the flange connection end 1011 and the flange connection end 1021, Placed between the flange connection end 1011 and the flange connection end 1021; the two pad surfaces of the gasket 107 are respectively attached to the flange connection end 1011 and the flange connection end 1021 .
  • the flange connection device further includes: a seal ring 108; the flange connection end 1011 includes: an annular groove 10111, and the annular groove 10111 and The sealing ring 108 is matched; the sealing ring 108 is placed in the annular groove 10111, and is in abutment with the annular groove 10111 and the flange connection end 1021.
  • the flange connection device provided by the present utility model can further effectively reduce the leakage of the insulating gas through the secondary sealing, provide double protection for the risks caused by the leakage of the insulating gas, extend the maintenance period, and improve, for example, offshore wind power
  • the reliability of the platform reduces greenhouse gas emissions.
  • the above-mentioned secondary sealing structure 1 or secondary sealing structure 2 can be selected according to the requirements of the size, production cost, and application scenario of the flange connection device. While achieving the secondary seal, the flange connection device has applicability.
  • the first connection portion and the second connection portion can be fixedly connected by the following two fixed connection structures.
  • Both the first connection portion and the second connection portion are correspondingly matched.
  • Both the first connection portion and the second connection portion include: a fixed support plate and at least a pair of fixed connection holes provided on the fixed support plate, and the first connection is connected by bolts and nuts
  • the fixed connection hole included in the part is fixedly connected with the fixed connection hole included in the matching second connection part, and the fixed connection includes the meaning of bolt and nut fastening.
  • the first connection portion and the second connection portion are correspondingly matched.
  • Each of the first connection portion and the second connection portion includes: at least a pair of fixed support sub-sections, and each of the fixed support sub-sections is provided with a fixed connection hole, and the first connection portion
  • the fixed connection hole on the second connection portion is correspondingly matched, and the fixed connection hole included in the first connection portion and the fixed connection hole included in the second connection portion are fixedly connected by bolts and nuts. Connection includes the meaning of bolt and nut tightening.
  • a pair of fixed connection holes includes two fixed connection holes; a pair of fixed support sub-portions includes two fixed support sub-portions.
  • the first connection portion and the second connection portion may be mirror images of each other, and then the structure of the first connection portion is similar to that of the second connection portion.
  • the structure of the first connection portion and the second connection portion is described below by taking one structure of the first connection portion as an example in FIG. 4.
  • the first connection portion 103 includes: a first fixed support plate 1031 and at least a pair of first fixed connection holes 1032; the first fixed support plate 1031 is disposed on the first flange 101 Outside, and perpendicular to the center axis of the first flange 101, the center of the first fixed support plate 1031 is on the center axis; each pair of the first fixed connection holes 1032 is provided at the center On the first fixed support plate 1031; in each pair of the first fixed connection holes 1032, a line connecting the two first fixed connection holes 1032 passes through the central axis.
  • the second connection portion 105 includes: a second fixed support plate and a second fixed connection hole corresponding to each of the first fixed connection holes 1032; the second fixed support plate is disposed in the second fixed support plate The outside of the second flange 102 is perpendicular to the central axis of the second flange 102, and the center of the second fixed support plate is on the central axis; each of the second fixed connection holes is provided On the second fixed support plate;
  • the fixed connection is that the corresponding first fixed connection hole 1032 and the second fixed connection hole are fixedly connected by bolts and nuts.
  • This fixed connection includes the meaning of bolt and nut tightening.
  • the first connection portion and the second connection portion may be mirror images of each other, and then the structure of the first connection portion is similar to that of the second connection portion.
  • the structure of the first connection portion and the second connection portion is described below by taking a structure of the first connection portion as an example in FIG. 5.
  • the first connection portion 103 includes: at least a pair of first fixed support sub-portions 1033 and third fixed connection holes 1034 provided on each of the first fixed support sub-portions; each For the first fixed support sub-portion 1033, the line connecting the two first fixed support sub-portions 1033 passes through the central axis; each of the third fixed connection holes on the first fixed support sub-portion 1033
  • the number may be one or plural; however, in each pair of the first fixed support sub-portions 1033, the number of the third fixed connection holes included in the two first fixed support sub-portions 1033 is equal, and the third The positions of the fixed connection holes on the first fixed support sub-portion are the same.
  • the second connecting portion 105 includes a second supporting sub-portion corresponding to each of the first fixed supporting sub-portions and a fourth fixing provided on each of the second fixed supporting sub-portions.
  • the fixed connection is that the corresponding third fixed connection hole and the fourth fixed connection hole are fixedly connected by bolts and nuts.
  • the fixed connection structure 1 or fixed connection structure 2 can be selected according to the requirements of the size, production cost, and application scenario of the flange connection device to meet the requirements of different application scenarios, making the flange connection device more applicable.
  • the first connection portion 103 is close to the flange connection end 1011; the second connection portion 105 is close to the flange connection end 1021. It is further ensured that the first connection portion and the second connection portion are subjected to all axial forces generated by the internal pressure of the insulating gas in the gas-insulated switch.
  • first multiplexed welding ring 104 and the second multiplexed welding ring 106 that have been welded into one body are cut, they can be rewelded into one body.
  • the first reused welding ring included in the first flange is matched with the matched one.
  • the second reused welding ring included in the second flange is welded into one body.
  • the first connection portion included in the first flange is fixedly connected to the second connection portion of the matching second flange.
  • the first reuse welding ring included in the blue and the second reuse welding ring included in the matching second flange are welded into one body to achieve the welding seal of the flange connection device. Since the welding position is relatively stable, it generally does not occur Problems such as deformation can enhance the tightness of the flange connection.
  • the flange connection device In the flange connection device provided in this embodiment, all axial forces generated by the internal pressure of the insulating gas in the gas insulated switch are borne by the first connection portion and the second connection portion, and the two flanges
  • the gap between the flange connection ends of the (first flange and second flange) is small enough, so the first reuse welding ring and the second reuse welding ring are welded into one body and used only for sealing. Pressure. Therefore, the thickness of the reuse welding ring (the first reuse welding ring and the second reuse welding ring) can be very small, and the corresponding welding seam size is also small, that is, the sealing performance of the flange connection can be enhanced.
  • the flange connection device provided by the present utility model is easy to connect and disconnect at the welding position, which is convenient for disassembly and improvement. To its applicability.
  • the secondary sealing is performed by a gasket or a sealing ring.
  • the secondary sealing can further effectively reduce the leakage of the insulating gas, and provide double protection for the risks caused by the leakage of the insulating gas. Extend the maintenance period, improve the reliability of offshore wind power platforms, and reduce greenhouse gas emissions.
  • the fixed connection structure 1 or the fixed connection can be selected according to the requirements of the size, production cost, and application scenario of the flange connection device. Structure two makes the flange connection device more applicable.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

法兰连接装置，该法兰连接装置包括：第一法兰（101）、第二法兰（102）、第一连接部（103）、第一复用焊接环（104）、第二连接部（105）和第二复用焊接环（106）；第一连接部（103），设置于第一法兰（101）的外侧，且与第一法兰（101）的中心轴线相垂直；第一复用焊接环（104），设置于第一法兰（101）的第一法兰连接端的外侧，第一复用焊接环（104）的中心在第一法兰（101）的中心轴线上；第二连接部（105），设置于第二法兰（102）的外侧，且与第二法兰（102）的中心轴线相垂直；第二复用焊接环（106），设置于第二法兰（102）的第二法兰连接端的外侧；第二复用焊接环（106）的中心在第二法兰（102）的中心轴线上；第一复用焊接环（104）与第二复用焊接环（106）以焊接方式一体成型；第一连接部与第二连接部固定连接。该法兰连接装置能够加强法兰连接的密封性。

Description

法兰连接装置 技术领域
本实用新型涉及机械技术领域，特别涉及法兰连接装置。
背景技术
对于气体绝缘开关来说，其内部的绝缘气体如SF 6、N 2等形成的高压绝缘环境，是维持气体绝缘开关正常运行的关键因素之一。而气体绝缘开关内部的绝缘气体发生泄漏的原因主要包括：气体绝缘开关中的连接部位，如设备与设备间的连接处、设备与管道间的连接处以及管道与管道间的连接处等，出现密封性问题。因此，解决连接部位的密封性问题则显得十分重要。
目前，气体绝缘开关中的各个连接部位的一种密封连接方式为法兰连接。而现有的法兰连接是直接通过密封垫或者密封圈放置在两个连接法兰之间，并通过螺丝和螺母固定两个法兰，实现密封。由于密封垫或者密封圈比较容易变形或者老化，出现密封不严密的问题，尤其对于重新组装的法兰连接，比如，拆开法兰连接进行检修，检修完成后再重新组装拆开后的法兰连接，出现密封不严密问题的几率会大大增加。
实用新型内容
本实用新型实施例提供了法兰连接装置，能够加强法兰连接的密封性。
本实用新型实施例提供了法兰连接装置，应用于气体绝缘开关，包括：
相匹配的第一法兰和第二法兰，与所述第一法兰一体成型的第一连接部和第一复用焊接环，以及与所述第二法兰一体成型的第二连接部和第二复用焊接环；
所述第一连接部，设置于所述第一法兰的外侧，且与所述第一法兰的中心轴线相垂直；
所述第一复用焊接环，设置于所述第一法兰的第一法兰连接端的外侧，所述第一复用焊接环的中心在所述第一法兰的中心轴线上；
所述第二连接部，设置于所述第二法兰的外侧，且与所述第二法兰的中心轴线相垂直；
所述第二复用焊接环，设置于所述第二法兰的第二法兰连接端的外侧；所述第二复 用焊接环的中心在所述第二法兰的中心轴线上；
所述第一复用焊接环与所述第二复用焊接环以焊接方式一体成型；所述第一连接部与所述第二连接部固定连接。
优选地，
所述法兰连接装置，进一步包括：密封垫，
所述密封垫，与所述第一法兰连接端和所述第二法兰连接端相匹配，放置于所述第一法兰连接端与所述第二法兰连接端之间；
所述密封垫的两个垫面分别与所述第一法兰连接端和所述第二法兰连接端相贴合。
优选地，
所述法兰连接装置，进一步包括：密封圈；
所述第一法兰连接端包括：环形凹槽，所述环形凹槽与所述密封圈相匹配；
所述密封圈放置于所述环形凹槽内，并与所述环形凹槽和所述第二法兰连接端相贴合。
优选地，
所述第一连接部，包括：第一固定支撑盘和至少一对第一固定连接孔；
所述第二连接部，包括：第二固定支撑盘以及与每一个所述第一固定连接孔对应匹配的第二固定连接孔；
所述第一固定支撑盘设置于所述第一法兰的外侧，且与所述第一法兰的中心轴线相垂直，所述第一固定支撑盘的中心在所述第一法兰的中心轴线上；
所述第二固定支撑盘设置于所述第二法兰的外侧，且与所述第二法兰的中心轴线相垂直，所述第二固定支撑盘的中心在所述第二法兰的中心轴线上；
每一对所述第一固定连接孔，设置于所述第一固定支撑盘上；
每一对所述第一固定连接孔中，两个所述第一固定连接孔的连线穿过所述中心轴线；
每一个所述第二固定连接孔，设置于所述第二固定支撑盘上；
对应匹配的所述第一固定连接孔与所述第二固定连接孔通过螺栓和螺母固定连接。
优选地，
所述第一连接部，包括：至少一对第一固定支撑子部以及设置于每一个所述第一固定支撑子部上的第三固定连接孔；
每一对所述第一固定支撑子部中，两个所述第一固定支撑子部的连线穿过所述第一法兰的中心轴线；
所述第二连接部，包括：与每一个所述第一固定支撑子部对应匹配的第二支撑子部以及设置于每一个所述第二固定支撑子部上的第四固定连接孔；
一个所述第三固定连接孔对应匹配一个所述第四固定连接孔；
对应匹配的所述第三固定连接孔与所述第四固定连接孔通过螺栓和螺母固定连接。
优选地，
所述第一连接部靠近所述第一法兰连接端；
所述第二连接部靠近所述第二法兰连接端。
本实用新型实施例提供的法兰连接装置，在两个相匹配的第一法兰和第二法兰进行法兰连接时，第一法兰包括的第一复用焊接环与相匹配的第二法兰包括的第二复用焊接环被焊接成一体，同时，第一法兰包括的第一连接部与相匹配的第二法兰的第二连接部固定连接，通过第一法兰包括的第一复用焊接环与相匹配的第二法兰包括的第二复用焊接环被焊接成一体，实现了法兰连接装置的焊接密封，由于焊接部位比较稳固，一般不会发生变形等问题，能够加强法兰连接的密封性。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图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。
图1是本实用新型一个实施例提供的法兰连接装置的切面示意图；
图2是本实用新型一个实施例提供的另一个法兰连接装置的切面示意图；
图3是本实用新型一个实施例提供的另一个法兰连接装置的切面示意图；
图4是本实用新型一个实施例提供的一种法兰的截面示意图；
图5是本实用新型一个实施例提供的一种法兰的截面示意图。
具体实施方式
为使本实用新型实施例的目的、技术方案和优点更加清楚，下面将结合本实用新型 实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本实用新型一部分实施例，而不是全部的实施例，基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
如图1所示，本实用新型一个实施例提供了一种法兰连接装置，应用于气体绝缘开关，包括：相匹配的第一法兰101和第二法兰102、与所述第一法兰101一体成型的第一连接部103和第一复用焊接环104以及与所述第二法兰102一体成型的第二连接部105和第二复用焊接环106；
所述第一连接部103，设置于所述第一法兰101的外侧，且与所述第一法兰101的中心轴线相垂直；
所述第一复用焊接环104，设置于所述第一法兰101的法兰连接端1011的外侧，所述第一复用焊接环104中心在所述第一法兰101的中心轴线上；
所述第二连接部105，设置于所述第二法兰102的外侧，且与所述第二法兰102的中心轴线相垂直；
所述第二复用焊接环106，设置于所述第二法兰102的法兰连接端1021的外侧；所述第二复用焊接环106中心在所述第二法兰102的中心轴线上；
所述第一复用焊接环104与所述第二复用焊接环106被焊接成一体；所述第一连接部103与所述第二连接部105间固定连接，以实现密封连接。
本实用新型提供的法兰连接装置，在两个相匹配的第一法兰和第二法兰进行法兰连接时，第一法兰包括的第一复用焊接环与相匹配的第二法兰包括的第二复用焊接环被焊接成一体，同时，第一法兰包括的第一连接部与相匹配的第二法兰的第二连接部固定连接，通过第一法兰包括的第一复用焊接环与相匹配的第二法兰包括的第二复用焊接环被焊接成一体，实现了法兰连接装置的焊接密封，由于焊接部位比较稳固，一般不会发生变形等问题，能够加强法兰连接的密封性。
上述实施例提供的法兰连接装置中，气体绝缘开关中的绝缘气体的内部压力产生的所有轴向力，是通过第一连接部和第二连接部承受的，而两个法兰的法兰连接端之间的空隙足够小，所以第一复用焊环和第二复用焊环以焊接方式一体成型后仅仅用于密封，几乎不承压。因此复用焊环(第一复用焊环和第二复用焊环)厚度可以非常小，相应的焊缝尺寸也很小，即能够加强法兰连接的密封性。
另外，与现有的直接焊接连接(比如两个设备或者两个管道被直接焊接在一起)相 比，本实用新型提供的法兰连接装置，焊接部位易于连接和断开，方便拆装。
需要说明的是，法兰连接端1011的端面与第一复用焊接环104的一个侧面处于同一平面。
为了使法兰连接装置实现二次密封，以进一步提高法兰连接装置密封性。本实用新型提供的下述两种二次密封结构。
二次密封结构一：
在本实用新型一个实施例中，如图2所示，所述法兰连接装置，进一步包括：密封垫107，所述密封垫107，与法兰连接端1011和法兰连接端1021相匹配，放置于所述法兰连接端1011与所述法兰连接端1021之间；所述密封垫107的两个垫面分别与所述法兰连接端1011和所述法兰连接端1021相贴合。
二次密封结构二：
在本实用新型一个实施例中，如图3所示，所述法兰连接装置，进一步包括：密封圈108；所述法兰连接端1011包括：环形凹槽10111，所述环形凹槽10111与所述密封圈108相匹配；所述密封圈108放置于所述环形凹槽10111内，并与所述环形凹槽10111和所述法兰连接端1021相贴合。
也就是说，本实用新型提供的法兰连接装置，通过二次密封能够进一步有效地降低绝缘气体泄漏，对由绝缘气体泄漏造成的风险提供了双重保护，能够延长维护期限，提高比如海上风力发电平台的可靠性，另一方面，减少温室气体排放等。
另外，可根据法兰连接装置的大小、生产成本、应用场景等的需求，选择上述二次密封结构一或者二次密封结构二，在实现二次密封的同时，法兰连接装置具有适用性。
上述第一连接部和第二连接部可通过下述两种固定连接结构实现固定连接。
固定连接结构一：
第一连接部和第二连接部对应匹配，第一连接部和第二连接部均包括：固定支撑盘和设置在固定支撑盘上的至少一对固定连接孔，通过螺栓和螺母将第一连接部包括的固定连接孔与相匹配的第二连接部包括的固定连接孔固定连接，该固定连接包含螺栓和螺母紧固的含义。
固定连接结构二：
第一连接部和第二连接部对应匹配，第一连接部和第二连接部均包括：至少一对固定支撑子部，在每一个固定支撑子部上设置有固定连接孔，第一连接部上的固定连接孔 与第二连接部上的固定连接孔对应匹配，通过螺栓和螺母将第一连接部包括的固定连接孔与相匹配的第二连接部包括的固定连接孔固定连接，该固定连接包含螺栓和螺母紧固的含义。
需要说明的是，一对固定连接孔包括两个固定连接孔；一对固定支撑子部包括两个固定支撑子部。
下面对上述两种固定连接结构进行分别说明：
针对固定连接结构一：
第一连接部和第二连接部可互为镜像，则第一连接部的结构和第二连接部的结构类似。下面以图4给出的第一连接部的一种结构为例，对第一连接部和第二连接部的结构进行说明。
如图4所示，所述第一连接部103，包括：第一固定支撑盘1031和至少一对第一固定连接孔1032；所述第一固定支撑盘1031设置于所述第一法兰101的外侧，且与所述第一法兰101的中心轴线相垂直，所述第一固定支撑盘1031的中心在所述中心轴线上；每一对所述第一固定连接孔1032，设置于所述第一固定支撑盘1031上；每一对所述第一固定连接孔1032中，两个所述第一固定连接孔1032的连线穿过所述中心轴线。
相应地，所述第二连接部105，包括：第二固定支撑盘以及与每一个所述第一固定连接孔1032对应匹配的第二固定连接孔；所述第二固定支撑盘设置于所述第二法兰102的外侧，且与所述第二法兰102的中心轴线相垂直，所述第二固定支撑盘的中心在所述中心轴线上；每一个所述第二固定连接孔，设置于所述第二固定支撑盘上；
则固定连接为，对应匹配的所述第一固定连接孔1032与所述第二固定连接孔通过螺栓和螺母固定连接。该固定连接包含螺栓和螺母紧固的含义。
针对固定连接结构二：
第一连接部和第二连接部可互为镜像，则第一连接部的结构和第二连接部的结构类似。下面以图5给出的第一连接部的一种结构为例，对第一连接部和第二连接部的结构进行说明。
如图5所示，所述第一连接部103，包括：至少一对第一固定支撑子部1033以及设置于每一个所述第一固定支撑子部上的第三固定连接孔1034；每一对所述第一固定支撑子部1033中，两个所述第一固定支撑子部1033的连线穿过所述中心轴线；每一个第一固定支撑子部上的第三固定连接孔的个数可以为一个，也可以为多个；但是，每一对第一固定支撑子部1033中，两个第一固定支撑子部1033上包含的第三固定连接孔的个数 相等，且第三固定连接孔在第一固定支撑子部上的位置相同。
相应地，所述第二连接部105，包括：与每一个所述第一固定支撑子部对应匹配的第二支撑子部以及设置于每一个所述第二固定支撑子部上的第四固定连接孔；一个所述第三固定连接孔对应匹配一个所述第四固定连接孔；
则固定连接为，对应匹配的所述第三固定连接孔与所述第四固定连接孔通过螺栓和螺母固定连接。
可根据法兰连接装置的大小、生产成本、应用场景等的需求，选择上述固定连接结构一或者固定连接结构二，以满足不同应用场景的需求，使法兰连接装置更加具有适用性。
上述两种二次密封结构和两种固定连接结构间可以任意组合。
在本实用新型一个实施例中，所述第一连接部103靠近所述法兰连接端1011；所述第二连接部105靠近所述法兰连接端1021。进一步保证第一连接部和第二连接部承受气体绝缘开关中的绝缘气体的内部压力产生的所有轴向力。
上述焊接成一体的所述第一复用焊接环104与所述第二复用焊接环106被切分后，可被重新焊接成一体。
本实用新型提供的法兰连接装置，至少具有如下有益效果：
1、在本实用新型提供的法兰连接装置中，在两个相匹配的第一法兰和第二法兰进行法兰连接时，第一法兰包括的第一复用焊接环与相匹配的第二法兰包括的第二复用焊接环被焊接成一体，同时，第一法兰包括的第一连接部与相匹配的第二法兰的第二连接部固定连接，通过第一法兰包括的第一复用焊接环与相匹配的第二法兰包括的第二复用焊接环被焊接成一体，实现了法兰连接装置的焊接密封，由于焊接部位比较稳固，一般不会发生变形等问题，能够加强法兰连接的密封性。
2、在本实施例提供的法兰连接装置中，气体绝缘开关中的绝缘气体的内部压力产生的所有轴向力，是通过第一连接部和第二连接部承受的，而两个法兰(第一法兰和第二法兰)的法兰连接端之间的空隙足够小，所以第一复用焊环和第二复用焊环被焊接成一体后仅仅用于密封，几乎不承压。因此复用焊环(第一复用焊环和第二复用焊环)厚度可以非常小，相应的焊缝尺寸也很小，即能够加强法兰连接的密封性。
3、与现有的直接焊接连接(比如两个设备或者两个管道被直接焊接在一起)相比，本实用新型提供的法兰连接装置，焊接部位易于连接和断开，方便拆装，提高了其适用性。
4、在本实用新型提供的整流装置中，通过密封垫或者密封环进行二次密封，通过二次密封能够进一步有效地降低绝缘气体泄漏，对由绝缘气体泄漏造成的风险提供了双重保护，能够延长维护期限，提高比如海上风力发电平台的可靠性，另一方面，减少温室气体排放等。
5、在本实用新型提供的整流装置中，提供了两种固定连接结构实现固定连接，可根据法兰连接装置的大小、生产成本、应用场景等的需求，选择上述固定连接结构一或者固定连接结构二，使法兰连接装置更加具有适用性。
需要说明的是，在本文中，诸如第一和第二之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同因素。
最后需要说明的是：以上所述仅为本实用新型的较佳实施例，仅用于说明本实用新型的技术方案，并非用于限定本实用新型的保护范围。凡在本实用新型的精神和原则之内所做的任何修改、等同替换、改进等，均包含在本实用新型的保护范围内。

Claims (6)

  1. 法兰连接装置，其特征在于，应用于气体绝缘开关，包括：
    相匹配的第一法兰(101)和第二法兰(102)，与所述第一法兰(101)一体成型的第一连接部(103)和第一复用焊接环(104)，以及与所述第二法兰(102)一体成型的第二连接部(105)和第二复用焊接环(106)；
    所述第一连接部(103)，设置于所述第一法兰(101)的外侧，且与所述第一法兰(101)的中心轴线相垂直；
    所述第一复用焊接环(104)，设置于所述第一法兰(101)的第一法兰连接端(1011)的外侧，所述第一复用焊接环(104)的中心在所述第一法兰(101)的中心轴线上；
    所述第二连接部(105)，设置于所述第二法兰(102)的外侧，且与所述第二法兰(102)的中心轴线相垂直；
    所述第二复用焊接环(106)，设置于所述第二法兰(102)的第二法兰连接端(1021)的外侧；所述第二复用焊接环(106)的中心在所述第二法兰(102)的中心轴线上；
    所述第一复用焊接环(104)与所述第二复用焊接环(106)以焊接方式一体成型；所述第一连接部(103)与所述第二连接部(105)固定连接。
  2. 根据权利要求1所述的法兰连接装置，其特征在于，进一步包括：密封垫(107)，
    所述密封垫(107)，与所述第一法兰连接端(1011)和所述第二法兰连接端(1021)相匹配，放置于所述第一法兰连接端(1011)与所述第二法兰连接端(1021)之间；
    所述密封垫(107)的两个垫面分别与所述第一法兰连接端(1011)和所述第二法兰连接端(1021)相贴合。
  3. 根据权利要求1所述的法兰连接装置，其特征在于，进一步包括：密封圈(108)；
    所述第一法兰连接端(1011)包括：环形凹槽(10111)，所述环形凹槽(10111)与所述密封圈(108)相匹配；
    所述密封圈(108)放置于所述环形凹槽(10111)内，并与所述环形凹槽(10111)和所述第二法兰连接端(1021)相贴合。
  4. 根据权利要求1所述的法兰连接装置，其特征在于，
    所述第一连接部(103)，包括：第一固定支撑盘(1031)和至少一对第一固定连接孔(1032)；
    所述第二连接部(105)，包括：第二固定支撑盘以及与每一个所述第一固定连接孔对应匹配的第二固定连接孔；
    所述第一固定支撑盘(1031)设置于所述第一法兰(101)的外侧，且与所述第一法兰(101)的中心轴线相垂直，所述第一固定支撑盘(1031)的中心在所述第一法兰(101)的中心轴线上；
    所述第二固定支撑盘设置于所述第二法兰的外侧，且与所述第二法兰的中心轴线相垂直，所述第二固定支撑盘的中心在所述第二法兰(102)的中心轴线上；
    每一对所述第一固定连接孔(1032)，设置于所述第一固定支撑盘(1031)上；
    每一对所述第一固定连接孔(1032)中，两个所述第一固定连接孔(1032)的连线穿过所述中心轴线；
    每一个所述第二固定连接孔，设置于所述第二固定支撑盘上；
    对应匹配的所述第一固定连接孔(1032)与所述第二固定连接孔通过螺栓和螺母固定连接。
  5. 根据权利要求1所述的法兰连接装置，其特征在于，
    所述第一连接部(103)，包括：至少一对第一固定支撑子部(1033)以及设置于每一个所述第一固定支撑子部上的第三固定连接孔(1034)；
    每一对所述第一固定支撑子部(1033)中，两个所述第一固定支撑子部(1033)的连线穿过所述第一法兰(101)的中心轴线；
    所述第二连接部(105)，包括：与每一个所述第一固定支撑子部(1033)对应匹配的第二支撑子部以及设置于每一个所述第二固定支撑子部上的第四固定连接孔；
    一个所述第三固定连接孔(1034)对应匹配一个所述第四固定连接孔；
    对应匹配的所述第三固定连接孔(1034)与所述第四固定连接孔通过螺栓和螺母固定连接。
  6. 根据权利要求1至4任一所述的法兰连接装置，其特征在于，
    所述第一连接部(103)靠近所述第一法兰连接端(1011)；
    所述第二连接部(105)靠近所述第二法兰连接端(1021)。
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