WO2016169031A1 - 电压互感器隔离装置和气体绝缘开关设备 - Google Patents

电压互感器隔离装置和气体绝缘开关设备 Download PDF

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Publication number
WO2016169031A1
WO2016169031A1 PCT/CN2015/077310 CN2015077310W WO2016169031A1 WO 2016169031 A1 WO2016169031 A1 WO 2016169031A1 CN 2015077310 W CN2015077310 W CN 2015077310W WO 2016169031 A1 WO2016169031 A1 WO 2016169031A1
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WO
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Prior art keywords
voltage transformer
guide
guide rod
rod
isolation device
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Application number
PCT/CN2015/077310
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English (en)
French (fr)
Inventor
曾露莎
阙银中
Original Assignee
Abb技术有限公司
曾露莎
阙银中
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 Abb技术有限公司, 曾露莎, 阙银中 filed Critical Abb技术有限公司
Priority to PCT/CN2015/077310 priority Critical patent/WO2016169031A1/zh
Priority to EP15889520.1A priority patent/EP3288050B1/en
Publication of WO2016169031A1 publication Critical patent/WO2016169031A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/075—Earthing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0356—Mounting of monitoring devices, e.g. current transformers

Definitions

  • the invention belongs to the technical field of electric power products, and particularly relates to a voltage transformer isolation device for a gas insulated switchgear and a control device, wherein the gas insulated switchgear and the control device use dry air as an insulating medium.
  • the commonly used medium and high voltage gas insulated switchgear and control equipment voltage transformer isolation device has a metal plate with an isolation blade and a spring wound at the end, and a U-shaped structure is designed at both high and low pressure.
  • the arm is swung so that the end spring snaps into the "U" configuration.
  • This structure can be smoothly applied to medium-pressure gas switching devices and control devices using sulfur hexafluoride as an insulating medium.
  • FIG. 1A, 1B and 1C are schematic views of a conventional voltage transformer isolation device and its structure mounted on a gas insulated switchgear and control device.
  • the wire spring 5 is mounted on the voltage transformer 64 by a nut. When the fork 62 is not applied to the wire spring 5, the voltage transformer 64 is turned on due to the spring force of the wire spring 5, as shown in Fig. 1B.
  • the shift fork 62 acts on the wire spring 5, so that the voltage transformer 64 is in an isolated state, but is not grounded, as shown in Fig. 1C.
  • FIG. 2A-2G are schematic diagrams of another conventional voltage transformer isolation device and a structure thereof mounted on a gas insulated switchgear and control device; wherein, FIG. 2A is a schematic diagram of a connection between a swing bar and a spring, and FIG. 2B is a pendulum. A perspective view of the rod, and Fig. 2C is a perspective view of the spring. As shown, the spring 92 snaps into the slot 911 of the rocker 91. The swing lever 91 is mounted on the rotating shaft 75 by a nut. The rocker 91 is connected to the voltage transformer socket 73 via a spring 72, whereby the swing lever 91 is connected to the voltage transformer. 2D is a perspective view of a grounded "U" type sheet, and FIG.
  • 2E is a schematic view of a "U" type structure composed of a copper block and a copper row.
  • the grounded "U” shaped sheet 10 is coupled to the housing 74 by bolting.
  • the copper block 81 is mounted on the copper bar 82 to constitute a "U” type structure.
  • the driving piece 71 is fixed to the rotating shaft 75. When the external device drives the driving piece 71, the rotating shaft 75 is rotated, and the rotation of the swinging rod 91 is realized.
  • the voltage transformer is turned on, as shown in Fig. 2F.
  • the voltage transformer is in an isolated state and is reliably grounded, as shown in Fig. 2G. The voltage transformer is in an isolated state.
  • the above-mentioned conventional voltage transformer isolation device adopts a "U" type structure for both the high voltage end and the low voltage end, so that the air gap between the high and low pressures is reduced.
  • the spring 92 is only inserted into the slot 911 of the swing lever 91 after deformation, if the swing lever is offset from the center of the "U" type structure, the spring 92 is easily detached, and the voltage transformer cannot be guaranteed to be turned on or Ground.
  • the present invention is directed to the disadvantages of the prior art voltage transformer isolation device.
  • One aspect of the present invention provides a voltage transformer isolation device including a swing lever and a guide rod, and a compression device; the guide rod has a guide rod guide The end of the connecting rod and the arc-shaped guiding rod; the guiding rod is moved by the external force under the external force of the guiding rod, and the compression device is compressed; when the external force is cancelled, the force of the compression device can be The guide rod is reset.
  • the compression device comprises a compression spring and an internally threaded nut, the inner end of the inner thread nut has an internal thread; the end of the swing rod has an external thread, and the swing rod has a guide hole therein;
  • the compression spring is mounted on the guiding end of the guiding rod of the guiding rod, the guiding end of the guiding rod is installed in the guiding hole, the connecting end of the guiding rod passes through the guiding rod outlet hole on the internally threaded nut, and then passes through the internally threaded nut and the swing rod
  • the external thread is fitted with an assembly connection.
  • the guide rod further has a guide rod portion, the guide rod portion is located at the guide end of the guide rod and the connecting end of the guide rod; the diameter of the guide rod portion is larger than the diameter of the connecting end of the guide rod and the compression spring The outer diameter.
  • the internally threaded nut has a guiding rod guiding hole therein, and the end portion has a guiding rod outlet hole; the guiding rod guiding hole is adapted to move the guiding rod portion therein; the size of the guiding rod outlet hole , adapted to extend the connecting end of the guide rod, and the guide rod portion cannot protrude.
  • the arc-shaped guide rod connecting end of the guide rod is an internally threaded nut; and one end of the guiding rod guiding end of the guiding rod has an internal thread adapted to the internally threaded nut. External thread; the internal thread nut and the guide end of the guide rod are connected by a thread body.
  • the internally threaded nut comprises an arcuate nut end and a nut snap.
  • the compression device comprises a compression spring and a lower compression buckle and an upper compression buckle on the swing rod; a nut clamp portion is arranged on the bottom of the internal thread nut; the compression spring is mounted on the guide end of the guide rod of the guide rod and is mounted on the guide rod Between the lower compression buckle and the nut card portion.
  • the diameter of the nut catch portion is larger than the diameter of the end of the arcuate nut and the outer diameter of the compression spring.
  • the lower compression buckle has a guide rod guiding hole
  • the upper compression buckle has a guide rod outlet hole
  • the guide rod guiding hole is adapted to the guide rod guiding end to move therein, and is compressed The spring cannot pass through
  • the guide hole is adapted to extend from the end of the arc-shaped nut, and the nut portion cannot protrude.
  • the rocker is an aluminum alloy rocker.
  • the guide rod is an aluminum alloy guide rod.
  • the compression spring is a stainless steel spring.
  • a gas insulated switchgear comprising a voltage transformer, further comprising a metal shield block, a tension spring, and a voltage transformer isolation device according to any of the preceding claims; said voltage transformer isolation The device is connected to the voltage transformer through a metal shielding block and a tension spring; one end of the tension spring is connected to the metal shielding block, and the other end is connected to the voltage transformer isolation device; the metal shielding block is mounted on the voltage transformer by bolts.
  • the tension spring is used when the shift fork does not act on the voltage transformer isolation device, the voltage transformer isolation device will be a voltage transformer and The high voltage end of the primary circuit is connected so that the voltage transformer is turned on.
  • the voltage transformer isolation device contacts the housing to realize the isolation grounding function.
  • the voltage transformer isolation device of the invention adopts a round bar telescopic design, and when the isolation device contacts the casing, the length can be automatically adjusted to achieve good contact with the casing.
  • FIG. 1A-1C are schematic views of a conventional voltage transformer isolation device and a structure thereof mounted on a gas insulated switchgear and a control device; wherein, FIG. 1A is a perspective view of the wire spring, and FIG. 1B is in a state in which the voltage transformer is in an ON state.
  • the 1C voltage transformer is in isolation.
  • FIGS. 2A-2G are schematic diagrams of another conventional voltage transformer isolation device and a structure thereof mounted on a gas insulated switchgear and control device; wherein, FIG. 2A is a schematic diagram of a connection between a swing bar and a spring, and FIG. 2B is a pendulum.
  • Fig. 2C is a perspective view of the spring
  • Fig. 2D is a perspective view of the grounded "U” type piece
  • Fig. 2E is a schematic view of a "U" type structure composed of a copper block and a copper row
  • Fig. 2F is a state in which the voltage transformer is in an on state
  • Fig. 2G The transformer is isolated.
  • FIG. 3A-3F are schematic views of a first preferred embodiment of a voltage transformer isolation device for a gas insulated switchgear and a control device of the present invention; wherein, FIG. 3A is a perspective view, FIG. 3B is a cross-sectional view, and FIG. 3C is a cross-sectional view of the swing bar; 3D-3F are structural exploded views of the compression device, wherein FIG. 3D is a cross-sectional view of the internally threaded nut, FIG. 3E is a perspective view of the compression spring, and FIG. 3F is a perspective view of the guide rod;
  • FIG. 4A and FIG. 4B are schematic diagrams showing a first preferred embodiment of the voltage transformer isolation device of the present invention, and a partial structure diagram of the voltage transformer mounted on the gas insulated switchgear and the control device; wherein the voltage transformer of FIG. 4A is connected Through state, the voltage transformer of Figure 4B is in the gap Off grounded state;
  • FIG. 5A-5G are schematic views of still another preferred embodiment of a voltage transformer isolation device for a gas insulated switchgear and a control device of the present invention; wherein, FIG. 5A is a perspective view, FIG. 5B is a front view, and FIG. 5C is a perspective view of the swing bar FIG. 5D is a structural view of the guide rod, FIG. 5E is a cross-sectional view of the internally threaded nut, FIG. 5F is a perspective view of the compression spring, and FIG. 5G is a perspective view of the guide end of the guide rod.
  • the present invention provides a voltage transformer isolation device comprising a swing rod 11, 31 and a guide rod 14, 34, characterized in that it further comprises compression means 13, 33; the guide rods 14, 34 have a guide rod guiding end 142 , 342 and the arc-shaped guide rod connecting ends 141, 341; the guide rods are moved by the external force by the connecting rod connecting ends 141, 341, and can be moved along the swing rods 11, 31, and the compression devices 13, 33 are compressed; When the external force is removed, the force of the compression means 13, 33 resets the guides 14, 34.
  • FIG. 3A-3F are schematic views of a first preferred embodiment of a voltage transformer isolation device for a gas insulated switchgear and a control device of the present invention; wherein, FIG. 3A is a perspective view, FIG. 3B is a cross-sectional view, and FIG. 3C is a cross-sectional view of the swing bar; 3D-3F are structural exploded views of the compression device, wherein FIG. 3D is a cross-sectional view of the internally threaded nut, FIG. 3E is a perspective view of the compression spring, and FIG. 3F is a perspective view of the guide rod;
  • the compression device 13 includes a compression spring 131 and an internally threaded nut 132 having an internal thread 1321 at an inner surface end thereof and an external thread 111 at an end of the swing rod 11
  • the swinging rod 11 has a guiding hole 112; the compression spring 131 is mounted on the guiding rod guiding end 142 of the guiding rod 14, and the guiding rod guiding end 142 is mounted on the guiding hole 112.
  • the guide rod connecting end 141 passes through the guide rod outlet hole 1323 on the internally threaded nut, and then is fitted and coupled with the external thread 111 on the swing rod 11 through the internally threaded nut 132.
  • the guide rod 14 further has a guide rod portion 143, the guide rod portion 143 is located at the guide rod guiding end 142 and the guide rod connecting end 141; the diameter of the guide rod portion 143 is larger than the diameter of the connecting rod connecting end 141 and The outer diameter of the compression spring 131.
  • the internally threaded nut 132 has a guide rod guide hole 1322 therein, and a guide rod outlet hole 1323 at the end; the guide rod guide hole 1322 is adapted to move the guide rod portion 143 therein; the guide rod exit hole The size of 1323 is adapted to extend beyond the guide connecting end 141, and the guide bar portion 143 cannot be extended.
  • FIGS. 4A and 4B are schematic diagrams showing the first preferred embodiment of the voltage transformer isolation device of the present invention, and a partial structure of the voltage transformer mounted on the gas insulated switchgear and the control device.
  • a voltage transformer 27, a metal shield block 22, a tension spring 23, and a voltage transformer isolation device 1 according to any of the preceding claims are included.
  • the voltage transformer isolation device 1 is connected to the voltage transformer 27 through a metal shielding block 22 and a tension spring 23; one end of the tension spring 23 is connected to the metal shielding block 22, and the other end is connected to the voltage transformer isolation device 1;
  • the shielding block 22 is mounted on the voltage transformer 27 by bolts
  • the tension spring 23 is used when the shift fork 24 is not applied to the voltage transformer isolation device 1, and the voltage transformer isolation device 1 connects the voltage transformer 27 and the high voltage end of the primary circuit to make the voltage The transformer 27 is in an on state, so that the voltage value of the primary circuit can be obtained by the voltage transformer.
  • the voltage transformer isolation device 1 contacts the housing 28 because the compression spring 131 It is compressed, so that the connecting rod connecting end 141 can automatically adjust the length to achieve a smooth connection with the housing 28, thereby achieving a reliable isolation grounding function, which can ensure personal safety during maintenance of the maintenance personnel.
  • FIG. 5A-5G are schematic views of still another preferred embodiment of a voltage transformer isolation device for a gas insulated switchgear and a control device of the present invention; wherein, FIG. 5A is a perspective view, FIG. 5B is a front view, and FIG. 5C is a perspective view of the swing bar FIG. 5D is a structural view of the guide rod, FIG. 5E is a cross-sectional view of the internally threaded nut, FIG. 5F is a perspective view of the compression spring, and FIG. 5G is a perspective view of the guide end of the guide rod.
  • the guide rod 34 is composed of a female threaded nut 341 and a guide rod guiding end 342; the leading end of the guiding rod guiding end 342 has an external thread adapted to the internal thread of the internally threaded nut 341; the internally threaded nut 341 and the guiding rod
  • the guide end 342 is integrally connected by a screw connection.
  • the internally threaded nut 341 includes an arcuate nut end 3412 and a nut retaining portion 3411 at the bottom; the nut retaining portion 3411 has a larger diameter than the arcuate nut end 3412 The diameter and the outer diameter of the compression spring 331.
  • the compression device 33 includes a compression spring 331 and an upper compression buckle 312 and a lower compression buckle 311 on the swing lever 31; the compression spring 331 is mounted on the guide of the guide rod 34.
  • the rod guiding end 342 is mounted between the lower compression buckle 311 and the nut card portion 3411.
  • the lower compression buckle 311 has a guide rod guiding hole 3111
  • the upper compression buckle 312 has a guide rod outlet hole 3121
  • the guide rod guiding hole 3111 is adapted to move the guide rod guiding end 342 therein, and The compression spring 331 cannot pass through
  • the size of the guide rod outlet hole 3121 is adapted to extend from the arcuate nut end portion 3412, and the nut hook portion 3411 cannot protrude.
  • the voltage transformer isolation device of the second preferred embodiment of the present invention is provided in a gas insulated switch In the application of the standby and control device, when the shift fork does not act on the voltage transformer isolation device, the voltage transformer isolation device connects the voltage transformer and the high voltage end of the primary circuit, so that the voltage transformer is in an on state, The voltage value of the primary circuit can be obtained through the voltage transformer
  • the voltage transformer isolation device contacts the housing, because the compression spring 331 is compressed, so that the guide rod connection end 341 can automatically adjust the length to reach the housing. Smooth connection.
  • the swing bars 11, 31 of the voltage transformer isolation device are aluminum alloy swing bars
  • the guide bars 14, 34 are aluminum alloy guide bars
  • the compression springs 131, 331 are stainless steel springs.
  • the aluminum alloy is characterized by its low price and light weight.
  • the guide bars 14, 34 and the swing bars 11, 31 may also be made of other conductive materials such as copper or ordinary steel.
  • the voltage transformer isolation device of the invention adopts a round bar telescopic design, and when the isolation device contacts the casing, the length can be automatically adjusted to achieve good contact with the casing. At the same time, the electric field strength here is superior to the existing isolation arm, eliminating the "U" structure in the existing device, thereby increasing the insulation distance. Therefore, the invention can effectively improve the insulation level of the medium voltage gas insulated switchgear and the control device and realize the reliable grounding function.
  • a voltage transformer isolation device of the present invention is provided The application of gas insulated switchgear and control equipment and explains how it works.
  • the voltage transformer isolation device of the present invention can also be applied to devices in other electrical fields. Therefore, the scope of protection of the present invention is not limited to voltage transformer isolation devices and their use in gas insulated switchgear and control devices.

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  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

一种电压互感器隔离装置，包括摆杆（11,31），导杆（14,34）和压缩装置（13,33），所述导杆（14,34）有导杆导向端（142,342）和圆弧状导杆连接端（141,341），所述导杆在导杆连接端（141,341）受到外力作用下，可沿摆杆（11,31）方向移动，且将压缩装置（13,33）压缩；当外力撤销时，压缩装置（13,33）的作用力可使导杆（14,34）复位。故采用圆棒伸缩设计，有利于提高气体绝缘开关设备和控制设备的绝缘水平。

Description

电压互感器隔离装置和气体绝缘开关设备 技术领域
本发明属于电力产品技术领域，具体涉及一种用于气体绝缘开关设备和控制设备上的电压互感器隔离装置，所述气体绝缘开关设备和控制设备采用干燥空气作为绝缘介质。
背景技术
目前，常用的中、高压气体绝缘开关设备和控制设备的电压互感器隔离装置，其隔离刀臂采用金属片，端部缠绕一弹簧，同时在高低压处都设计有“U”型的结构。在电压互感器接通或接地时，摆动刀臂，使端部弹簧卡入“U”型结构中。此结构能顺利地用于使用六氟化硫作为绝缘介质的中压气体开关设备和控制设备。
但是，对于采用干燥空气作为绝缘介质的中、高压气体绝缘开关设备和控制设备，需要对此处进行电场的优化，才可满足绝缘要求。现有隔离刀臂电场强度不够好，且装置中的“U”型结构，对绝缘距离不利。
图1A，1B和1C是现有的电压互感器隔离装置示意图和其安装于气体绝缘开关设备和控制设备上的结构示意图。线弹簧5通过螺母安装在电压互感器64上，当拨叉62未作用在线弹簧5上时，由于线弹簧5的弹簧力作用，使电压互感器64处于接通状态，如图1B所示。
当驱动装置63驱动拨叉62时，拨叉62作用于线弹簧5上，使电压互感器64处于隔离状态，但是未接地，如图1C所示。
当上述现有的电压互感器隔离装置用于采用干燥空气作为绝缘介质的气体绝缘开关设备和控制设备时，当电压互感器64处于隔离状态时，此时高压连接片61与线弹簧5的间距不够大，同时由于线弹簧5的线径较小，场强较高，此时对绝缘非常不利。同时，由于电压互感器64在隔离状态时，没有接地，对维护检修人员造成一定的安全威胁。
图2A-2G是另外一种现有的电压互感器隔离装置示意图和其安装于气体绝缘开关设备和控制设备上的结构示意图；其中，图2A为摆杆与弹簧的连接示意图，图2B为摆杆立体图，图2C为弹簧立体图。如图所示，弹簧92卡入摆杆91的卡槽911中。摆杆91通过螺母安装在转轴75上。摆杆91通过弹簧72与电压互感器插座73接通，以此实现摆杆91与电压互感器的接通。图2D为接地″U”型片立体图，图2E为铜块与铜排组成的″U”型结构示意图。接地″U”型片10通过螺栓联接与壳体74连接。铜块81安装在铜排82上，构成″U”型结构。驱动片71固定在转轴75上，当外部装置驱动驱动片71时，带动转轴75转动，同时实现摆杆91的转动。
当摆杆91转动，使弹簧92卡入由铜块81与铜排82构成的″U″型结构中，此时，电压互感器为接通状态，如图2F所示。当摆杆91转动，使弹簧92卡入接地″U”型片10时，此时电压互感器处于隔离状态，同时可靠接地，如图2G电压互感器处于隔离状态。
上述这种现有的电压互感器隔离装置，由于高压端和低压端都采用″U”型结构，这样便使得高低压间的空气间距减小。同时，由于弹簧92只是通过形变后卡入摆杆91的卡槽911中，如果摆杆偏移″U”型结构的中心，此时，弹簧92就容易脱落，无法保证电压互感器接通或者接地。
因此，需要一种对电场优化了、且绝缘距离更好的电压互感器隔离装置。
发明内容
本发明针对现有技术中电压互感器隔离装置的缺点，本发明的一个方面，提供一种电压互感器隔离装置，包括摆杆和导杆，还包括压缩装置；所述导杆有导杆导向端和圆弧状导杆连接端；所述导杆在导杆连接端受到外力作用下，可沿摆杆方向移动，且将压缩装置压缩；当外力作用撤销时，压缩装置的作用力可使导杆复位。
根据本发明的一个最佳实施例，所述压缩装置包括压缩弹簧和内螺纹螺母，所述内螺纹螺母内表面端部有内螺纹；摆杆端部有外螺纹，摆杆中有导向孔；所述压缩弹簧安装于导杆的导杆导向端上，导杆导向端安装于导向孔中，导杆连接端穿过内螺纹螺母上的导杆出孔，然后通过内螺纹螺母与摆杆上的外螺纹配合装配连接。
根据本发明的最佳实施例，所述导杆还具有导杆卡部，导杆卡部位于导杆导向端和导杆连接端；导杆卡部的直径大于导杆连接端的直径和压缩弹簧的外径。
根据本发明的最佳实施例，所述内螺纹螺母内有导杆导向孔，端部有导杆出孔；导杆导向孔适用于导杆卡部在其内移动；导杆出孔的大小，适应于导杆连接端伸出，且导杆卡部不能伸出。
根据本发明的又一最佳实施例，所述导杆的圆弧状导杆连接端为内螺纹螺母；所述导杆的导杆导向端一个端部有与内螺纹螺母的内螺纹相适应的外螺纹；内螺纹螺母和导杆导向端通过螺纹连接为一 体。
根据本发明的最佳实施例，所述内螺纹螺母包括圆弧状螺母端部和螺母卡部。
所述压缩装置包括压缩弹簧和位于摆杆上的下压缩卡扣和上压缩卡扣；内螺纹螺母底部有螺母卡部；所述压缩弹簧安装于导杆的导杆导向端上，并安装于所述的下压缩卡扣和螺母卡部之间。
所述螺母卡部的直径大于圆弧状螺母端部的直径和压缩弹簧的外径。
根据本发明的最佳实施例，所述下压缩卡扣上有导杆导向孔，上压缩卡扣上有导杆出孔；导杆导向孔适应于导杆导向端在其内移动，且压缩弹簧不能穿过；导杆出孔适应于圆弧状螺母端部伸出，且螺母卡部不能伸出。
根据本发明的最佳实施例，所述摆杆为铝合金摆杆。所述导杆为铝合金导杆。所述压缩弹簧为不锈钢弹簧。
本发明的另一方面，提供一种气体绝缘开关设备，包括电压互感器，还包括金属屏蔽块、拉伸弹簧和如前面任意一项所述的电压互感器隔离装置；所述电压互感器隔离装置通过金属屏蔽块、拉伸弹簧与电压互感器连接；拉伸弹簧一端与金属屏蔽块连接，另一端与所述的电压互感器隔离装置连接；金属屏蔽块通过螺栓安装在电压互感器上。
根据本发明的最佳实施例，所述拉伸弹簧用于当拨叉未作用于所述电压互感器隔离装置上时，电压互感器隔离装置将电压互感器和 一次回路高压端连接，使电压互感器处于接通状态。
当驱动装置驱动拨叉作用于所述电压互感器隔离装置上时，电压互感器隔离装置接触到壳体，实现隔离接地功能。
本发明的电压互感器隔离装置采用圆棒伸缩设计，当该隔离装置接触到壳体时，可自动调节长度，达到与壳体的良好接触。
附图说明
图1A-1C是现有的电压互感器隔离装置示意图和其安装于气体绝缘开关设备和控制设备上的结构示意图；其中，图1A为线弹簧立体图，图1B电压互感器处于接通状态，图1C电压互感器处于隔离状态。
图2A-2G是另外一种现有的电压互感器隔离装置示意图和其安装于气体绝缘开关设备和控制设备上的结构示意图；其中，图2A为摆杆与弹簧的连接示意图，图2B为摆杆立体图，图2C为弹簧立体图，图2D为接地″U”型片立体图，图2E为铜块与铜排组成的″U”型结构示意图，图2F电压互感器处于接通状态，图2G电压互感器处于隔离状态。
图3A-3F为本发明的气体绝缘开关设备和控制设备上的电压互感器隔离装置第一最佳实施例示意图；其中，图3A为立体图，图3B为剖视图，图3C为摆杆的剖视图；图3D-3F为压缩装置的结构分解图，其中，图3D为内螺纹螺母的剖视图，图3E为压缩弹簧立体图，图3F为导杆的立体示意图；
图4A和图4B为本发明的电压互感器隔离装置的第一最佳实施例，与电压互感器安装于气体绝缘开关设备和控制设备上的局部结构示意图；其中，图4A电压互感器处于接通状态，图4B电压互感器处于隔 离接地状态；
图5A-5G为本发明的气体绝缘开关设备和控制设备上的电压互感器隔离装置又一最佳实施例示意图；其中，图5A为立体图，图5B为前视图，图5C为摆杆的立体图；图5D为导杆的结构图，图5E为内螺纹螺母的剖视图，图5F为压缩弹簧立体图，图5G为导杆导向端的立体示意图。
具体实施方式
以下参考附图，给出了本发明的可选实施方式的具体描述。
本发明提供了一种电压互感器隔离装置，包括摆杆11，31和导杆14，34，其特征在于：还包括压缩装置13，33；所述导杆14，34有导杆导向端142，342和圆弧状导杆连接端141，341；所述导杆在导杆连接端141，341受到外力作用下，可沿摆杆11，31方向移动，且将压缩装置13，33压缩；当外力作用撤销时，压缩装置13，33的作用力可使导杆14，34复位。
图3A-3F为本发明的气体绝缘开关设备和控制设备上的电压互感器隔离装置第一最佳实施例示意图；其中，图3A为立体图，图3B为剖视图，图3C为摆杆的剖视图；图3D-3F为压缩装置的结构分解图，其中，图3D为内螺纹螺母的剖视图，图3E为压缩弹簧立体图，图3F为导杆的立体示意图；
根据本发明的第一最佳实施例，所述压缩装置13包括压缩弹簧131和内螺纹螺母132，所述内螺纹螺母132内表面端部有内螺纹1321；摆杆11端部有外螺纹111，摆杆11中有导向孔112；所述压缩弹簧131安装于导杆14的导杆导向端142上，导杆导向端142安装于导向孔112 中，导杆连接端141穿过内螺纹螺母上的导杆出孔1323，然后通过内螺纹螺母132与摆杆11上的外螺纹111配合装配连接。
如图3F所示，导杆14还具有导杆卡部143，导杆卡部143位于导杆导向端142和导杆连接端141；导杆卡部143的直径大于导杆连接端141直径和压缩弹簧131的外径。
如图3B和3D所示，内螺纹螺母132内有导杆导向孔1322，端部有导杆出孔1323；导杆导向孔1322适用于导杆卡部143在其内移动；导杆出孔1323的大小，适应于导杆连接端141伸出，且导杆卡部143不能伸出。
图4A和图4B为本发明的电压互感器隔离装置的第一最佳实施例，与电压互感器安装于气体绝缘开关设备和控制设备上的局部结构示意图。在气体绝缘开关设备和控制设备中，包括电压互感器27、金属屏蔽块22、拉伸弹簧23和如前面任意一项所述的电压互感器隔离装置1。电压互感器隔离装置1通过金属屏蔽块22和拉伸弹簧23与电压互感器27连接；拉伸弹簧23一端与金属屏蔽块22连接，另一端与所述的电压互感器隔离装置1连接；金属屏蔽块22通过螺栓安装在电压互感器27上
如图4A所示，拉伸弹簧23用于当拨叉24未作用于所述电压互感器隔离装置1上时，电压互感器隔离装置1将电压互感器27和一次回路高压端连接，使电压互感器27处于接通状态，这样就可通过电压互感器获得一次回路的电压值
如图4B，当驱动装置25驱动拨叉24作用于所述电压互感器隔离装置1上时，电压互感器隔离装置1接触到壳体28，因为压缩弹簧131 被压缩，使得导杆连接端141可自动调节长度达到与壳体28的顺利连接，实现可靠隔离接地功能，可在检修人员检修时保证人身安全
图5A-5G为本发明的气体绝缘开关设备和控制设备上的电压互感器隔离装置又一最佳实施例示意图；其中，图5A为立体图，图5B为前视图，图5C为摆杆的立体图；图5D为导杆的结构图，图5E为内螺纹螺母的剖视图，图5F为压缩弹簧立体图，图5G为导杆导向端的立体示意图。
如图所示，导杆34由内螺纹螺母341和导杆导向端342组成；导杆导向端342一端部有与内螺纹螺母341的内螺纹相适应的外螺纹；内螺纹螺母341和导杆导向端342通过螺纹连接为一体。
如图5E所示，根据本发明的最佳实施例，内螺纹螺母341包括圆弧状螺母端部3412和位于底部的螺母卡部3411；螺母卡部3411的直径大于圆弧状螺母端部3412的直径和压缩弹簧331的外径。
如图5C，5D，5E和5F所示，压缩装置33包括压缩弹簧331和位于摆杆31上的上压缩卡扣312和下压缩卡扣311；所述压缩弹簧331安装于导杆34的导杆导向端342上，并安装于所述的下压缩卡扣311和螺母卡部3411两端之间。
如图5C所示，下压缩卡扣311上有导杆导向孔3111，上压缩卡扣312上有导杆出孔3121；导杆导向孔3111适用于导杆导向端342在其内移动，且压缩弹簧331不能穿过；导杆出孔3121的大小，适应于圆弧状螺母端部3412伸出，且螺母卡部3411不能伸出。
本发明第二最佳实施例的电压互感器隔离装置在气体绝缘开关设 备和控制设备中应用时，当拨叉未作用于所述电压互感器隔离装置上时，电压互感器隔离装置将电压互感器和一次回路高压端连接，使电压互感器处于接通状态，这样就可通过电压互感器获得一次回路的电压值
当驱动装置驱动拨叉作用于所述电压互感器隔离装置上时，电压互感器隔离装置接触到壳体，因为压缩弹簧331被压缩，使得导杆连接端341可自动调节长度达到与壳体的顺利连接。
本发明第二最佳实施例的电压互感器隔离装置，在气体绝缘开关设备和控制设备中应用的原理同第一最佳实施例，在此不再以附图形式示意。
根据本发明的上述和其他最佳实施例，电压互感器隔离装置的摆杆11，31为铝合金摆杆，导杆14，34为铝合金导杆；压缩弹簧131，331为不锈钢弹簧。铝合金材质的特点是价格便宜，而且材质轻。根据本发明的其他实施例，导杆14，34和摆杆11，31也可以选用其他导电材质，比如铜或者普通钢材。
本发明的电压互感器隔离装置的优点：
本发明的电压互感器隔离装置采用圆棒伸缩设计，当该隔离装置接触到壳体时，可自动调节长度，以此来达到与壳体的良好接触。同时，此处的电场强度优于现有隔离刀臂，取消了现有装置中的“U”型结构，从而增加了绝缘距离。所以，本发明可有效地提高中压气体绝缘开关设备和控制设备的绝缘水平和实现可靠接地功能。
作为本发明的最佳实施例，提供了本发明的电压互感器隔离装置在 气体绝缘开关设备和控制设备中的应用，并说明了其工作原理。本发明的电压互感器隔离装置还可以应用于其他电气领域的设备上。因此，本发明的保护范围并不局限于电压互感器隔离装置以及其在气体绝缘开关设备和控制设备中的应用。
尽管为说明目的公开了本发明的较佳实施例和附图，但是熟悉本领域技术的人员，在不脱离本发明及所附的权利要求的精神和范围内，可作各种替换、变化和润饰。因此，本发明不应局限于较佳实施例和附图所公开的内容，本发明的保护范围以所附的权利要求书所界定的范围为准。

Claims (15)

  1. 一种电压互感器隔离装置，包括摆杆(11，31)和导杆(14，34)，其特征在于：还包括压缩装置(13，33)；所述导杆(14，34)有导杆导向端(142，342)和圆弧状导杆连接端(141，341)；所述导杆在导杆连接端(141，341)受到外力作用下，可沿摆杆(11，31)方向移动，且将压缩装置(13，33)压缩；当外力作用撤销时，压缩装置(13，33)的作用力可使导杆(14，34)复位。
  2. 如权利要求1所述的电压互感器隔离装置，其特征在于：所述压缩装置(13)包括压缩弹簧(131)和内螺纹螺母(132)，所述内螺纹螺母(132)内表面端部有内螺纹(1321)，端部有导杆出孔(1323)；摆杆(11)端部有外螺纹(111)，摆杆(11)中有导向孔(112)；所述压缩弹簧(131)安装于导杆(14)的导杆导向端(142)上，导杆导向端(142)安装于导向孔(112)中，圆弧状导杆连接端(141)穿过内螺纹螺母(132)上的导杆出孔(1323)，然后通过内螺纹螺母(132)与摆杆(11)上的外螺纹(111)配合装配连接。
  3. 如权利要求2所述的电压互感器隔离装置，其特征在于：所述导杆(14)还具有导杆卡部(143)，导杆卡部(143)位于导杆导向端(142)和导杆连接端(141)；导杆卡部(143)的直径大于导杆连接端(141)的直径和压缩弹簧(131)的外径。
  4. 如权利要求3所述的电压互感器隔离装置，其特征在于：所述内螺纹螺母(132)内有导杆导向孔(1322)；导杆导向孔(1322)适用于导杆卡部(143)在其内移动；导杆出孔(1323)的大小， 适应于导杆连接端(141)伸出，且导杆卡部(143)不能伸出。
  5. 如权利要求1所述的电压互感器隔离装置，其特征在于：所述导杆(34)的圆弧状导杆连接端为内螺纹螺母(341)；所述导杆(34)的导杆导向端(342)一个端部有与内螺纹螺母(341)的内螺纹相适应的外螺纹；内螺纹螺母(341)和导杆导向端(342)通过螺纹连接为一体。
  6. 如权利要求5所述的电压互感器隔离装置，其特征在于：所述内螺纹螺母(341)包括圆弧状螺母端部(3412)和螺母卡部(3411)。
  7. 如权利要求6所述的电压互感器隔离装置，其特征在于：所述压缩装置(33)包括压缩弹簧(331)和位于摆杆(31)上的下压缩卡扣(311)和上压缩卡扣(312)；内螺纹螺母(341)底部有螺母卡部(3411)；所述压缩弹簧(331)安装于导杆(34)的导杆导向端(342)上，并安装于所述的下压缩卡扣(311)和螺母卡部(3411)之间。
  8. 如权利要求7所述的电压互感器隔离装置，其特征在于：所述螺母卡部(3411)的直径大于圆弧状螺母端部(3412)的直径和压缩弹簧(331)的外径。
  9. 如权利要求6-7任意一项所述的电压互感器隔离装置，其特征在于：所述下压缩卡扣(311)上有导杆导向孔(3111)，上压缩卡扣(312)上有导杆出孔(3121)；导杆导向孔(3111)适应于导杆导向端(342)在其内移动，且压缩弹簧(331)不能穿过；导杆出孔(3121)适应于圆弧状螺母端部(3412)伸出，且螺母卡部(3411)不能伸出。
  10. 如权利要求1-8任意一项所述的电压互感器隔离装置，其特 征在于：所述摆杆(11，31)为铝合金摆杆。
  11. 如权利要求1-8任意一项所述的电压互感器隔离装置，其特征在于：所述导杆(14，34)为铝合金导杆。
  12. 如权利要求1-8任意一项所述的电压互感器隔离装置，其特征在于：所述压缩弹簧(131，331)为不锈钢弹簧。
  13. 一种气体绝缘开关设备，包括电压互感器(27)其特征在于：还包括金属屏蔽块(22)、拉伸弹簧(23)和如权利要求1-10任意一项所述的电压互感器隔离装置(1)；所述电压互感器隔离装置(1)通过金属屏蔽块(22)、拉伸弹簧(23)与电压互感器(27)连接；拉伸弹簧(23)一端与金属屏蔽块(22)连接，另一端与所述的电压互感器隔离装置(1)连接；金属屏蔽块(22)安装在电压互感器(27)上。
  14. 如权利要求11所述的气体绝缘开关设备，其特征在于：所述拉伸弹簧(23)用于当拨叉(24)禾作用于所述电压互感器隔离装置(1)上时，电压互感器隔离装置(1)将电压互感器(27)和一次回路高压端连接，使电压互感器(27)处于接通状态。
  15. 如权利要求11或12所述的气体绝缘开关设备，其特征在于：当驱动装置(25)驱动拨叉(24)作用于所述电压互感器隔离装置(1)上时，电压互感器隔离装置(1)接触到壳体(28)，实现隔离接地功能。
PCT/CN2015/077310 2015-04-23 2015-04-23 电压互感器隔离装置和气体绝缘开关设备 WO2016169031A1 (zh)

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