WO2016066097A1 - 隔离断路器用灭弧室及使用该灭弧室的隔离断路器 - Google Patents

隔离断路器用灭弧室及使用该灭弧室的隔离断路器 Download PDF

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Publication number
WO2016066097A1
WO2016066097A1 PCT/CN2015/093061 CN2015093061W WO2016066097A1 WO 2016066097 A1 WO2016066097 A1 WO 2016066097A1 CN 2015093061 W CN2015093061 W CN 2015093061W WO 2016066097 A1 WO2016066097 A1 WO 2016066097A1
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WIPO (PCT)
Prior art keywords
contact
static
shield
circuit breaker
moving
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PCT/CN2015/093061
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English (en)
French (fr)
Inventor
钟建英
仝永刚
姚永其
杨珂
韩峰
王鹏超
张鸣帅
李小钊
赵晓民
张敬涛
刘文魁
朱秋楠
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国家电网公司
平高集团有限公司
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Application filed by 国家电网公司, 平高集团有限公司 filed Critical 国家电网公司
Publication of WO2016066097A1 publication Critical patent/WO2016066097A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc

Definitions

  • the invention relates to an arc extinguishing chamber for isolating a circuit breaker and an isolating circuit breaker using the same.
  • the isolation function is integrated into the circuit breaker, and the innovation is generated.
  • An isolated circuit breaker that can be used as an isolating switch with isolation.
  • a high-voltage isolating circuit breaker is disclosed in the Chinese Patent Application Publication No. CN101589446A, which has substantially the same structure as a general high-voltage circuit breaker, including an arc extinguishing chamber and a driving device disposed on the post insulator.
  • the moving main contact and the arc moving contact of the arc extinguishing chamber are moved to realize the operating mechanism of the circuit breaker opening and closing operation.
  • the circuit breaker is closed, the moving and static arcing contacts are firstly connected, and then the main contact is moved.
  • the moving arc contact when the moving arc contact moves away from the static arc contact under the traction of the operating mechanism through the insulating pull rod, the moving arc contact has two positions, one of which corresponds to the position of the static arc contact
  • the isolation circuit breaker is used as a conventional circuit breaker, and the other position away from the static arc contact corresponds to the use of the isolation circuit breaker as an isolation switch having isolation performance.
  • the moving arc contact of the above-mentioned high-voltage isolating circuit breaker is required to have a longer moving track than the arc-changing contact of the commonly used circuit breaker, and the operating mechanism is required to drive the moving arc contact to have two stops on the moving stroke. This provides a higher drive requirement for the circuit breaker operating mechanism and an additional increase in the overall size of the circuit breaker.
  • the invention provides an arc extinguishing chamber for isolating the circuit breaker, so as to solve the problem that the operating mechanism of the circuit breaker is required when the arcing contact has two stop positions during the moving process to realize the isolation performance of the circuit breaker.
  • the present invention also provides an isolating circuit breaker using the above-described arc extinguishing chamber.
  • the technical proposal for the arc extinguishing chamber for the isolating circuit breaker is: an arc extinguishing chamber for the isolating circuit breaker, wherein the static arcing chamber is provided with static main contacts, moving main contacts and static arc contacts arranged correspondingly in the up and down direction, The arcing contact, the static main contact and the static arc contact are located above the corresponding moving main contact and the moving arc contact when the isolating circuit breaker is opened, and the static arc contact and the arcing contact are located at the static main contact Inside the head and the moving main contact, the static arc contact and the static main contact are arranged to reciprocate in the up and down direction a shielding cover for shielding the static arc contact when the circuit breaker is opened, the bottom of the shielding cover is provided with a lower shielding end, and the shielding cover has a lower shielding end of the shielding cover when the circuit breaker is opened on the moving stroke to An isolation shielding position for shielding the static arc contact
  • a nozzle is arranged between the moving main contact and the moving arc contact, and the moving main contact and the moving arc contact move synchronously in the up and down direction, and the upper end of the spout extends to the top of the moving arc contact, and the spout is
  • the shield is drivingly coupled to drive the shield to reciprocate in an up and down direction.
  • the static arc contact is guided and moved in the up and down direction to be assembled in the arc extinguishing chamber, and a driving lever hinged in the arc extinguishing chamber is provided between the shield cover and the static arc contact, and the driving lever is driven
  • the two ends are assembled with the shield and the static arc contact respectively through a crank slider structure.
  • the two driving slider structures at the two ends of the driving lever have a fitting connection portion corresponding to the shield cover and the static arc contact, and the assembly connecting portion of the at least one crank slider structure is guided and moved in the up and down direction to be assembled in the up and down direction.
  • the installation slot is correspondingly disposed on the shield cover, the static arc contact or fixedly assembled with the shield cover and the static arc contact.
  • an isolating circuit breaker comprising an arc extinguishing chamber, wherein the static main contact, the moving main contact and the moving main contact arranged in the up and down direction are arranged in the arc extinguishing chamber
  • the static arc contact, the moving arc contact, the static main contact and the static arc contact are located above the corresponding moving main contact and the moving arc contact when the isolating circuit breaker is opened, and the static arc contact and the moving arc contact are located Inside the static main contact and the movable main contact, the static arc contact and the static main contact are arranged to reciprocate in an up and down direction to the static arc contact when the circuit breaker is opened
  • Forming a shielded shield Forming a shielded shield, the bottom of the shield is provided with a lower shield end, and the shield has a lower shield end of the shield when the breaker is opened, and the lower shield end of the shield moves below the static arc contact to form a
  • the shield can reciprocate in an up and down direction, and the shield has a lower shield end of the shield moving under the static arc contact to form a shield on the static arc contact when the circuit breaker is opened. Isolate the mask bit.
  • a nozzle is arranged between the moving main contact and the moving arc contact, and the moving main contact and the moving arc contact move synchronously in the up and down direction, and the upper end of the spout extends to the top of the moving arc contact, and the spout is
  • the shield is drivingly coupled to drive the shield to reciprocate in an up and down direction.
  • the static arc contact is guided and moved in the up and down direction to be assembled in the arc extinguishing chamber, and a driving lever hinged in the arc extinguishing chamber is provided between the shield cover and the static arc contact, and the driving lever is driven
  • the two ends are assembled with the shield and the static arc contact respectively through a crank slider structure.
  • the two driving slider structures at the two ends of the driving lever have a fitting connection portion corresponding to the shield cover and the static arc contact, and the assembly connecting portion of the at least one crank slider structure is guided and moved in the up and down direction to be assembled in the up and down direction.
  • the installation slot is correspondingly disposed on the shield cover, the static arc contact or fixedly assembled with the shield cover and the static arc contact.
  • the invention has the beneficial effects that: in the arc extinguishing chamber of the isolating circuit breaker provided by the invention, between the static arc contact and the static main contact, the static arc contact can be formed when the circuit breaker is opened
  • the shielded shield is assembled in the arc extinguishing chamber by reciprocating in the up and down direction. When the circuit breaker is opened, the shield is moved downward to the isolation shield position, so that when the circuit breaker is opened, the shield is downward.
  • the static arc contact is protruded, and the lower shield end of the shield moves below the static arc contact to completely shield the static arc contact, and the size of the shield does not need to be designed too much, because the shield is in the process of opening the circuit breaker There will be no ablation, and the main ablation part of the static arc contact is completely shielded by the shield when the circuit breaker is opened, to avoid the electric field distortion caused by the protrusion, deformation and ablation of the static arc contact, thereby effectively improving the isolation circuit breaker.
  • the electric field structure of the fracture formed by the broken static arc contact and the arcing contact ensures the insulation performance between the fracture of the isolation circuit breaker and the rated withstand voltage of the isolation circuit breaker fracture, so that the isolation circuit breaker can be used not only as an open circuit Device Use, but also as the insulation tolerance fracture higher demands disconnector used, such isolation breaker versatility.
  • the isolation circuit breaker can be used as a circuit breaker by using a shielding cover in the arc extinguishing chamber, and can also be used as a disconnecting switch.
  • the structure is simple and convenient to use, and no additional requirements are imposed on the operating structure of the existing circuit breaker. Effectively reduce the design and manufacturing cost of the isolating circuit breaker.
  • the moving main contact and the moving arc contact move downward with the nozzle, and the shield cover is moved downward, so that the shielding cover can be moved to the isolation shielding position to satisfy the shielding cover.
  • the shielding cover can be moved to the isolation shielding position to satisfy the shielding cover.
  • the driving lever can make the static arc contact cooperate with the shielding cover to move in the opposite direction. Specifically, When the isolating circuit breaker is closed, the shielding cover moves upward, and the static arc contact is driven to move downward to form a docking with the lower moving arc contact under the action of the driving lever, and the shielding cover is formed when the isolating circuit breaker is opened. Move down to the isolation shield position, under the action of the drive lever, the static arc contact will move upward to disengage from the arc contact, and the gate isolation of the static arc contact is realized when the shield moves to the isolation shield position. shield.
  • FIG. 1 is a schematic structural view of an isolation circuit breaker provided by the present invention.
  • FIG. 2 is a schematic structural view of the isolation circuit breaker shown in FIG. 1 in a state of being opened;
  • FIG. 3 is a schematic structural view of the isolation circuit breaker shown in FIG. 1 in a closed state.
  • an embodiment of an isolating circuit breaker the isolating circuit breaker in this embodiment may be a phase-by-phase operation of A, B, and C phases or a three-phase linkage operation
  • FIG. 1 is a circuit breaker.
  • a phase structure diagram comprising an arc extinguishing chamber 1, a post insulator 2 and an operating structure 3, and the arc extinguishing chamber 1 is filled with a set pressure having a good dielectric constant and an arc extinguishing characteristic Sulfur fluoride gas.
  • the arc extinguishing chamber 1 is provided with a static main contact 7, a moving main contact 10, a static arc contact 5, and a moving arc contact 11 which are arranged correspondingly in the up and down direction, and the static main contact 7 and the moving main body in this embodiment
  • the arrangement of the contact 10 and the static arc contact 5 and the arcing contact 11 and the form of the connection and disconnection between the corresponding contacts when the circuit breaker is in the opening and closing state are the same as those commonly used in the prior art.
  • the arrangement and action state of each contact in the device are basically the same, and the static main contact 7 and the static arc contact 5 are located above the corresponding moving main contact 10 and the moving arc contact 11 when the isolating circuit breaker is opened.
  • the arcing contact 5 and the arcing contact 11 are located inside the static main contact 7 and the moving main contact 10.
  • the arcing of the isolating circuit breaker in this embodiment A shield cover 8 is formed between the static arc contact 5 and the static main contact 7 to shield the static arc contact 5 when the circuit breaker is opened, and the shield 8 can reciprocate in the up and down direction.
  • the shield 8 has a lower shield end located below the static arc contact when the circuit breaker is opened, and the shield cover 8 has a screen on the moving stroke when the circuit breaker is opened.
  • the shield cover 8 is moved to the end of the arc downward force on the bit mask to isolate the stationary arcing contact 5 contacts the shield 5 is formed.
  • a spout 9 is provided between the movable main contact 10 and the arcing contact 11 in synchronization with the moving main contact 10 and the arcing contact 11 in the vertical direction, and the upper end of the spout 9 extends to the Above the movable arc contact 11, the spout 9 is drivingly coupled to the shield case 8 to drive the shield cover to reciprocate in the up and down direction.
  • a support member 6 fixedly mounted to the shield cover 8 is disposed inside the shield case 8, and the spout 9 is fixedly coupled to the support member 6 to drive the shield cover 8 to reciprocate in the up and down direction when the spout 9 reciprocates in the up and down direction.
  • the static arc contact 5 is guided and moved in the up and down direction to be assembled in the arc extinguishing chamber 1, and the shield cover 8 and the static arc contact 5 are hinged between the arc extinguishing chamber 1
  • the driving lever 4, the two ends of the driving lever 4 are respectively assembled with the supporting member 6 and the static arc contact 5 through the crank slider structure, and the driving lever is driven when the nozzle 9 reciprocates in the up and down direction with the shield cover 8 4
  • the opposite movement of the shield 8 and the static arc contact 5 can be achieved.
  • a support member is arranged on the inner side of the shielding cover 8 to support the shielding cover 8 on the one hand, and to prevent damage to the shielding cover and affect the shielding of the shielding cover itself when the driving connection between the driving lever 4 and the shielding cover 8 is realized. performance.
  • the two driving slider structures at both ends of the driving lever have a fitting connection portion corresponding to the shield cover and the static arc contact, and the assembly connecting portion of the crank slider structure corresponding to the shield cover 8 is assembled with the support member 6.
  • the assembly connecting portion is guided in the up-and-down direction to be assembled in the mounting groove extending in the up-and-down direction provided on the support member 6, such that the assembly connecting portion of the crank slider structure is assembled in the mounting groove along the up-and-down guiding movement
  • the static arc contact 5 can be driven to move in the up and down direction by the drive lever 4.
  • the arc extinguishing chamber 1 of the isolating circuit breaker adopts an advanced self-energizing arc extinguishing chamber, and an arc is formed between the arcing contact 11 and the static arcing contact 5 when the isolating circuit breaker breaks the fault current.
  • the gas pressure in 12 rises.
  • a strong two-way air blow is formed in the upstream region of the nozzle 9 to extinguish the arc, thereby achieving successful breaking of the circuit breaker and reducing the operating work of the operating mechanism.
  • the static arc contact 5 protrudes downwardly from the shield 8 and the arc burns between the moving and static arc contacts, and when the circuit breaker is in the opening position as shown in FIG. 3, the shield 8 moves downward to The shield position is isolated and the static arc contact 5 is completely shielded by the shield 8. Since the ablation does not occur during the opening of the shield case 8, the main ablation part of the static arc contact 5 is shielded at the opening position, so that the insulation between the breaks of the circuit breaker is ensured.
  • the operating mechanism 1 drives the movable contact assembly (including the moving main contact 10, the moving arc contact 11, and the spout 9) to move downward through the insulating pull rod, and the spout 9 passes through
  • the support member 6 drives the shield cover 8 to move downward rapidly. After the shield cover 8 is moved downward by the set distance, the mounting groove on the support member 6 will force the drive lever 4 to rotate through the assembly connection portion of the corresponding crank slider structure, thereby The static arc contact 5 is moved upside down for the opening operation.
  • the moving main contact 10 and the static main contact 7 are first separated, the fault current is transferred to the moving and static arcing contacts, and then the moving arc contact 11 and the static arcing contact 5 are separated, and the movement in the spout 9 is performed.
  • An arc is generated between the static arc contacts. It can be known from the self-expansion principle that the energy of the arc itself increases the pressure of the gas in the cylinder 12.
  • the throat of the nozzle 9 is separated from the static arc contact 5
  • the high-pressure gas in the cylinder 12 is ejected from the throat of the nozzle to perform arc-extinguishing. .
  • the shielding cover 8 drives the static arc contact 5 to move to the opening position by the driving lever 4, the shielding cover 8 is in the isolation shielding position, and the lower shielding end protrudes downwardly from the static arc contact 5, It is completely shielded, which can improve the electric field structure of the isolation circuit breaker fracture and avoid the electric field distortion caused by the protrusion, deformation and ablation of the static arc contact 5.
  • the operating mechanism 1 pushes the movable contact assembly (including the moving main contact 10, the moving arc contact 11, the spout 9) upward through the insulating pull rod, and the spout 9 passes through the support.
  • the member 6 drives the shield 8 to move up quickly.
  • the mounting groove on the support member 6 will force the drive lever 4 to rotate through the assembly connection portion of the corresponding crank slider structure, thereby carrying the static arc.
  • the contact 5 is moved downward in the reverse direction to perform a closing operation.
  • the switch is closed, the arcing contact 11 and the static arc contact 5 are first turned on.
  • the main contact 10 and the stationary main contact 7 are then turned on to form a main current path.
  • the shield cover 8 drives the static arc contact 5 to move to the closing position by the driving lever 4, at which time the static arc contact 5 protrudes downwardly to the lower shielding end of the shield cover 8, and the static and static arc contact
  • the head and the moving and static main contacts are turned on, and the current forms a path.
  • the above-mentioned isolating circuit breaker can be used not only as a conventional circuit breaker when the operating mechanism performs an operation for opening, but the shielding effect of the shielding cover on the static arc contact improves the insulation resistance between the fractures.
  • the isolation circuit breaker can also be used as an isolating switch, which improves the versatility of the circuit breaker, reduces the use of power equipment in the substation, and reduces the power outage time.
  • the isolation circuit breaker can perform the opening operation of the circuit breaker to meet the performance of the circuit breaker and the opening performance of the isolating switch, without complicated modification and control of the operating mechanism.
  • the provided isolating circuit breaker can be directly improved on the existing circuit breaker, effectively utilizing the existing circuit breaker and reducing the transformation cost.
  • the shield case is driven to reciprocate in the up and down direction by the nozzle, so that the drive mechanism of the circuit breaker itself can be utilized, and no additional drive mechanism is required.
  • a drive mechanism that drives the movement of the shield may be additionally provided.
  • the shield cover needs to be designed to reciprocate in the up and down direction, so that the circuit breaker closing and opening requirements can be met, if both the shield cover and the static arc contact are directly fixed together, and the shield is shielded.
  • the lower shield end of the cover is uniformly located below the static arc contact, which cannot meet the closing and opening requirements of the circuit breaker. If the lower shield end of the shield is uniformly below the static arc contact, after the dynamic and static main contacts are separated, The shield has the highest electric field strength and induces an electric field.
  • the shield material is generally not resistant to ablation, and on the other hand, if the electric field strength of the shield is too large, the arc cannot be extinguished.
  • the opposite movement of the shield cover and the static arc contact is realized by driving the lever, so that after the shield cover is effectively shielded from the static arc contact, the operation work can be saved, and in other embodiments, another operation can be performed.
  • a drive mechanism is added to drive the static arc contact to reciprocate, and the drive lever can be omitted.
  • the driving lever is hinged in the arc extinguishing chamber, so in order to ensure the normal movement of the shield cover and the static arc contact in the up and down direction and the normal rotation of the driving lever, it is necessary to provide corresponding crank slip at both ends of the driving lever.
  • the block structure, the drive slider structure can adopt the crank slider structure commonly used in the prior art.
  • the mounting connecting portion of the crank slider structure of the driving lever facing the one end of the shielding cover is guided and moved in the up-and-down direction to be assembled in the mounting groove, so that the driving lever is forced to rotate to drive after the shielding cover moves the set distance.
  • the static arc contact moves in the opposite direction.
  • the mounting connection portion of the crank slider structure of the driving lever toward the end of the static arc contact can also be guided and moved in the up and down direction in the mounting groove, and the same can be achieved after the shield moves the set distance.
  • the drive lever rotates to drive the static arc contact to move in the opposite direction.
  • the present invention also provides an arc extinguishing chamber for an isolating circuit breaker.
  • the structure of the arc extinguishing chamber is the same as that of the arc extinguishing chamber in the embodiment of the above-mentioned isolating circuit breaker, and details are not described herein again.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)

Abstract

一种隔离断路器用灭弧室（1）及使用该灭弧室的隔离断路器，隔离断路器包括灭弧室，灭弧室中设有沿上下方向对应布置的静主触头（7）、动主触头（10）和静弧触头（5）、动弧触头（11），静主触头、静弧触头在隔离断路器分闸时位于对应的动主触头、动弧触头上方，静弧触头、动弧触头位于静主触头和动主触头内侧，静弧触头和静主触头之间设有可在断路器分闸时对静弧触头形成屏蔽的屏蔽罩（8），屏蔽罩具有在断路器分闸时位于静弧触头下方的下屏蔽端。通过在灭弧室中设置屏蔽罩使得隔离断路器既可以作为断路器使用，又可以作为隔离开关使用，结构简单，使用方便，可有效降低隔离断路器的设计以及制造成本。

Description

隔离断路器用灭弧室及使用该灭弧室的隔离断路器 技术领域
本发明涉及一种隔离断路器用灭弧室及使用该灭弧室的隔离断路器。
背景技术
随着断路器技术及可靠性的不断提高，为减少成本，减少电力设备使用量，减少电站占地面积，在进行电力设备设计时，多是将隔离功能集成到断路器中，创新性的产生了可具有隔离功能的可作为隔离开关使用的隔离断路器。
如在公开号为CN101589446A的中国发明专利申请公布说明书中公开了一种高压隔离断路器，这种断路器与一般的高压断路器的结构基本相同，包括设置在支柱绝缘子上的灭弧室及驱动灭弧室内部的动主触头及动弧触头移动以实现断路器分闸、合闸操作的操动机构，断路器合闸时，动、静弧触头先对接，然后动主触头与静主触头完成断路器合闸操作，而在断路器分闸时，动主触头与静主触头先断开，然后动、静弧触头再断开，并从喷口处喷出气体对动、静弧触头之间的拉弧进行灭弧操作，此时，静弧触头与动弧触头之间的距离满足断路器对触头断口的要求，然后动弧触头继续沿着远离静弧触头的方向移动，扩大静弧触头与动弧触头的间距来满足作为隔离开关的断路器的隔离断口的要求。
上述的高压隔离断路器中，当动弧触头在操动机构通过绝缘拉杆的牵引下远离静弧触头移动时，动弧触头具有两个位置，其中一个靠近静弧触头的位置对应使得隔离断路器作为常规的断路器使用，而另一个远离静弧触头的位置对应使得隔离断路器作为具有隔离性能的隔离开关使用。不仅要求上述的高压隔离断路器的动弧触头具有比一般常用的断路器的动弧触头更长的移动轨迹，还要求操动机构可以驱动动弧触头在移动行程上具有两个停止位，这就对断路器操动机构提出了更高的驱动要求，也额外增大了断路器的整体体积。
发明内容
本发明提供一种隔离断路器用灭弧室，以解决现有技术中通过驱动动弧触头在移动过程中具有两个停止位来实现断路器的隔离性能时对断路器的操动机构要求较高的技术问题；同时，本发明还提供一种使用上述灭弧室的隔离断路器。
本发明所提供的隔离断路器用灭弧室的技术方案是：隔离断路器用灭弧室，灭弧室中设有沿上下方向对应布置的静主触头、动主触头和静弧触头、动弧触头，静主触头、静弧触头在隔离断路器分闸时位于对应的动主触头、动弧触头上方，静弧触头、动弧触头位于所述静主触头和动主触头内侧，所述的静弧触头和静主触头之间设有可在上下方向上往复移动 以在断路器分闸时对所述静弧触头形成屏蔽的屏蔽罩，屏蔽罩底部设有下屏蔽端，屏蔽罩在移动行程上具有在断路器分闸时屏蔽罩的下屏蔽端移动至所述静弧触头下方以对静弧触头形成屏蔽的隔离屏蔽位。
所述的动主触头和动弧触头之间设有随所述动主触头和动弧触头沿上下方向同步移动的喷口，喷口上端延伸至所述动弧触头上方，喷口与所述屏蔽罩传动连接以驱动屏蔽罩沿上下方向往复移动。
所述的静弧触头沿上下方向导向移动装配在所述灭弧室中，在所述屏蔽罩和静弧触头之间设有铰接在所述灭弧室中的驱动杠杆，驱动杠杆的两端分别通过曲柄滑块结构与所述屏蔽罩和静弧触头装配。
所述的驱动杠杆两端的两驱动滑块结构具有对应与所述屏蔽罩、静弧触头装配的装配连接部，至少一个曲柄滑块结构的装配连接部沿上下方向导向移动装配在沿上下方向延伸的安装槽中，安装槽对应设置在屏蔽罩、静弧触头上或与所述屏蔽罩、静弧触头固定装配。
本发明所提供的使用上述灭弧室的隔离断路器的技术方案是：隔离断路器，包括灭弧室，灭弧室中设有沿上下方向对应布置的静主触头、动主触头和静弧触头、动弧触头，静主触头、静弧触头在隔离断路器分闸时位于对应的动主触头、动弧触头上方，静弧触头、动弧触头位于所述静主触头和动主触头内侧，所述的静弧触头和静主触头之间设有可在上下方向上往复移动以在断路器分闸时对所述静弧触头形成屏蔽的屏蔽罩，屏蔽罩底部设有下屏蔽端，屏蔽罩在移动行程上具有在断路器分闸时屏蔽罩的下屏蔽端移动至所述静弧触头下方以对静弧触头形成屏蔽的隔离屏蔽位。
所述的屏蔽罩可在上下方向上往复移动，屏蔽罩在移动行程上具有在断路器分闸时屏蔽罩的下屏蔽端移动至所述静弧触头下方以对静弧触头形成屏蔽的隔离屏蔽位。
所述的动主触头和动弧触头之间设有随所述动主触头和动弧触头沿上下方向同步移动的喷口，喷口上端延伸至所述动弧触头上方，喷口与所述屏蔽罩传动连接以驱动屏蔽罩沿上下方向往复移动。
所述的静弧触头沿上下方向导向移动装配在所述灭弧室中，在所述屏蔽罩和静弧触头之间设有铰接在所述灭弧室中的驱动杠杆，驱动杠杆的两端分别通过曲柄滑块结构与所述屏蔽罩和静弧触头装配。
所述的驱动杠杆两端的两驱动滑块结构具有对应与所述屏蔽罩、静弧触头装配的装配连接部，至少一个曲柄滑块结构的装配连接部沿上下方向导向移动装配在沿上下方向延伸的安装槽中，安装槽对应设置在屏蔽罩、静弧触头上或与所述屏蔽罩、静弧触头固定装配。
本发明的有益效果是：本发明所提供的隔离断路器的灭弧室中，在静弧触头和静主触头之间设有可在断路器分闸时对所述静弧触头形成屏蔽的屏蔽罩，屏蔽罩沿上下方向往复移动的装配在灭弧室中，在断路器分闸时，使屏蔽罩向下移动至隔离屏蔽位，这样在断路器分闸时，屏蔽罩向下突出静弧触头，屏蔽罩的下屏蔽端移动至静弧触头下方以对静弧触头形成完全屏蔽，屏蔽罩的尺寸不需要设计的过大，由于屏蔽罩在断路器分闸过程中不会出现烧蚀，主要烧蚀零件静弧触头在断路器分闸时被屏蔽罩完全屏蔽，避免因静弧触头突出、变形、烧蚀造成的电场畸变，进而有效改善隔离断路器中断开的静弧触头与动弧触头所形成的断口的电场结构，保证隔离断路器的断口间的绝缘性能，提高隔离断路器断口的额定耐受电压，使得隔离断路器不仅可以作为断路器使用，还可以作为对断口的绝缘耐受能力提出更高要求的隔离开关使用，使得隔离断路器通用性强。通过在灭弧室中设置屏蔽罩使得隔离断路器即可以作为断路器使用，又可以作为隔离开关使用，结构简单，使用方便，不会对现有断路器的操动结构提出另外的要求，可有效降低隔离断路器的设计、制造成本。
进一步的，在断路器进行分闸时，动主触头、动弧触头带着喷口向下移动，会带着屏蔽罩向下移动，进而可以使屏蔽罩移动至隔离屏蔽位，满足屏蔽罩对静弧触头的完全屏蔽的要求，由于在断路器中，喷口本身与动主触头、动弧触头同步移动，就不需要再另外给屏蔽罩设计驱动机构，降低隔离断路器的整体成本。
进一步的，为了改善开断后的隔离断路器的断口处的电场，并降低隔离断路器开断时的操作功，驱动杠杆可以使静弧触头配合屏蔽罩进行相反方向的移动，具体来讲，在隔离断路器进行合闸时，屏蔽罩向上运动，在驱动杠杆的作用下驱动静弧触头向下移动以与下方的动弧触头形成对接，而在隔离断路器分闸时，屏蔽罩将向下移动至隔离屏蔽位，在驱动杠杆的作用下，静弧触头将向上移动以与动弧触头脱离，在屏蔽罩移动至隔离屏蔽位时实现对静弧触头的分闸隔离屏蔽。
附图说明
图1是本发明所提供的隔离断路器的结构示意图；
图2是图1所示隔离断路器处于分闸状态时的结构示意图；
图3是图1所示隔离断路器处于合闸状态时的结构示意图。
具体实施方式
如图1至图3所示，一种隔离断路器的实施例，该实施例中的隔离断路器可以为A、B、C相分相式动作或者三相联动操作，图1为断路器的一相结构图，包括灭弧室1、支柱绝缘子2和操动结构3，灭弧室1内充有设定压力的具有良好介电常数和灭弧特性的六 氟化硫气体。
灭弧室1中设有沿上下方向对应布置的静主触头7、动主触头10和静弧触头5、动弧触头11，本实施例中的静主触头7、动主触头10和静弧触头5、动弧触头11的布置方式及在断路器处于分闸、合闸状态时对应触头之间的对接、断开的形式与现有技术中常用的断路器中的各触头的布置方式及动作状态基本一样，静主触头7、静弧触头5在隔离断路器分闸时位于对应的动主触头10、动弧触头11上方，静弧触头5、动弧触头11位于所述静主触头7和动主触头10内侧，与现有技术中的隔离断路器不同的是，本实施例中的隔离断路器的灭弧室中在静弧触头5和静主触头7之间设有可在断路器分闸时对所述静弧触头5形成屏蔽的屏蔽罩8，该屏蔽罩8可在上下方向上往复移动，屏蔽罩8具有在断路器分闸时位于所述静弧触头下方的下屏蔽端，屏蔽罩8在移动行程上具有在断路器分闸时屏蔽罩8的下屏蔽端移动至所述静弧触头5下方以对静弧触头5形成屏蔽的隔离屏蔽位。
本实施例中，动主触头10和动弧触头11之间设有随所述动主触头10和动弧触头11沿上下方向同步移动的喷口9，喷口9的上端延伸至所述动弧触头11上方，喷口9与所述屏蔽罩8传动连接以驱动屏蔽罩沿上下方向往复移动。具体来讲，在屏蔽罩8内侧设有与屏蔽罩8固定装配的支撑件6，喷口9通过与支撑件6固定连接以在喷口9沿上下方向往复移动时驱动屏蔽罩8沿上下方向往复移动。
另外，在本实施例中，静弧触头5沿上下方向导向移动装配在所述灭弧室1中，且屏蔽罩8和静弧触头5之间设有铰接在所述灭弧室1中的驱动杠杆4，驱动杠杆4的两端分别通过曲柄滑块结构与所述支撑件6和静弧触头5装配，在喷口9带着屏蔽罩8沿上下方向往复移动时，通过驱动杠杆4可以实现屏蔽罩8与静弧触头5的相反运动。在屏蔽罩8内侧设置支撑件，一方面可以对屏蔽罩8形成支撑，另一方面可以在实现驱动杠杆4与屏蔽罩8的传动连接时不会对屏蔽罩造成损坏而影响屏蔽罩自身的屏蔽性能。
并且，驱动杠杆两端的两驱动滑块结构具有对应与所述屏蔽罩、静弧触头装配的装配连接部，与屏蔽罩8相对应的曲柄滑块结构的装配连接部与支撑件6装配，且该装配连接部沿上下方向导向移动装配在所述支撑件6上设有的沿上下方向延伸的安装槽中，这样，由于曲柄滑块结构的装配连接部沿上下导向移动装配在安装槽中，这样一来，当喷口9通过支撑件6带着屏蔽罩8沿上下方向移动时，只有在屏蔽罩8移动设定距离后，安装槽的槽壁顶压在曲柄滑块结构的装配连接部后才能通过驱动杠杆4驱动静弧触头5在上下方向上移动。
在本实施例中，隔离断路器的灭弧室1采用先进的自能式灭弧室，在隔离断路器开断故障电流时，在动弧触头11和静弧触头5之间形成电弧，利用电弧自身的能量使压气缸 12内的气体压力升高，当电流过零时在喷口9上游区形成强烈的双向气吹从而熄灭电弧，实现断路器的成功开断，减小了操动机构的操作功。在开断过程时静弧触头5向下突出屏蔽罩8，电弧在动、静弧触头之间燃烧，而当断路器处于如3所示的分闸位置，屏蔽罩8向下移动至隔离屏蔽位，静弧触头5被屏蔽罩8完全屏蔽。由于屏蔽罩8开断过程中不会出现烧蚀，而主要烧蚀零件静弧触头5在分闸位置被屏蔽，使断路器的断口间的绝缘得以保证。
本实施例中的隔离断路器的分合闸操作过程具体如下：
如图2所示，在进行分闸操作时，操动机构1通过绝缘拉杆带动动触头装配(包括动主触头10、动弧触头11、喷口9)向下移动，而喷口9通过支撑件6驱动屏蔽罩8快速向下运动，在屏蔽罩8向下移动设定距离后，支撑件6上的安装槽将通过对应曲柄滑块结构的装配连接部迫使驱动杠杆4转动，进而带着静弧触头5向上反向运动以进行分闸操作。分闸时，动主触头10和静主触头7首先分离，故障电流转移到动、静弧触头上，接着动弧触头11和静弧触头5分离，在喷口9内的动、静弧触头间产生电弧。由自膨胀原理可知，电弧自身的能量使压气缸12内气体的压力增高，当喷口9喉部脱离静弧触头5之后，压气缸12内的高压气体从喷口喉部喷出，进行熄弧。在开断过程中，屏蔽罩8通过驱动杠杆4驱动静弧触头5反向运动到分闸位置时，屏蔽罩8处于隔离屏蔽位，其下屏蔽端向下突出静弧触头5，将其完全屏蔽，进而可以改善隔离断路器断口的电场结构，避免因静弧触头5突出、变形、烧蚀造成的电场畸变。
如图3所示，在进行合闸操作时，操动机构1通过绝缘拉杆推动动触头装配(包括动主触头10、动弧触头11、喷口9)向上移动，而喷口9通过支撑件6驱动屏蔽罩8快速向上运动，在屏蔽罩8向上移动设定距离后，支撑件6上的安装槽将通过对应曲柄滑块结构的装配连接部迫使驱动杠杆4转动，进而带着静弧触头5向下反向运动以进行合闸操作。合闸时，动弧触头11和静弧触头5首先接通。然后动主触头10和静主触头7接通，形成主电流通路。在合闸过程中，屏蔽罩8通过驱动杠杆4驱动静弧触头5反向运动到合闸位置，此时静弧触头5向下突出屏蔽罩8的下屏蔽端，动、静弧触头及动、静主触头接通，电流形成通路。
上述的隔离断路器在操动机构进行一次操动进行分闸操作时，该隔离断路器不仅可以作为常规的断路器使用，由于屏蔽罩对静弧触头的屏蔽作用提高了断口间的绝缘耐受力，还可以将该隔离断路器作为隔离开关来使用，提高了断路器的通用性，减少变电站内电力设备的使用量，减少了改造停电时间。隔离断路器在操动机构进行一次分闸操动即可满足断路器性能及隔离开关分闸性能，不需要对操动机构进行复杂的改进和控制。并且上述实施例所 提供的隔离断路器可以在现有的断路器上直接进行改进，有效利用了现有的断路器，降低改造成本。
上述实施例中，屏蔽罩由喷口驱动着在上下方向上往复移动，这样可以利用断路器自身的驱动机构，不需要另外增设驱动机构。在其他实施例中，也可以另外增设驱动屏蔽罩移动的驱动机构。
本实施例中，需要将屏蔽罩设计呈可沿上下方向往复移动，这样可以满足断路器合闸、分闸要求，如果直接将屏蔽罩和静弧触头两者均固定在一起，且使屏蔽罩的下屏蔽端一致位于静弧触头下方，无法满足断路器合闸、分闸要求，如果屏蔽罩的下屏蔽端一致位于静弧触头下方，则在动、静主触头分离后，屏蔽罩电场强度最大，会引发电场。另外，屏蔽罩材料一般不耐烧蚀，另一方面，如果屏蔽罩电场强度过大的话，电弧没法熄灭。
本实施例中，在分闸时，在动弧触头及屏蔽罩向下移动设计距离后，此时动、静弧触头快要分离时，才开始驱动静弧触头反向运动，可以提高分闸效率，降低操作功。
上述实施例中，通过驱动杠杆实现屏蔽罩和静弧触头的相反运动，这样在保证屏蔽罩对静弧触头的有效屏蔽后，还可以节省操作功，在其他实施例中，也可以另外增设驱动机构以驱动静弧触头往复移动，此时可以省去驱动杠杆。
上述实施例中，驱动杠杆铰接在灭弧室中，这样为保证屏蔽罩和静弧触头在上下方向上的正常移动以及驱动杠杆的正常转动，需要在驱动杠杆的两端设置对应的曲柄滑块结构，该驱动滑块结构可以采用现有技术常用的曲柄滑块结构。
上述实施例中，驱动杠杆的朝向屏蔽罩一端的曲柄滑块结构的装配连接部沿上下方向导向移动装配在安装槽中，这样在屏蔽罩移动设定距离后，才会迫使驱动杠杆转动以驱动静弧触头向相反方向运动。在其他实施例中，也可以使驱动杠杆的朝向静弧触头一端的曲柄滑块结构的装配连接部沿上下方向导向移动装配在安装槽中，同样可以实现在屏蔽罩移动设定距离后，驱动杠杆转动以驱动静弧触头向相反方向运动。
本发明还提供一种隔离断路器用灭弧室，该灭弧室的结构与上述隔离断路器的实施例中的灭弧室的结构相同，在此不再赘述。

Claims (8)

  1. 隔离断路器用灭弧室，灭弧室中设有沿上下方向对应布置的静主触头、动主触头和静弧触头、动弧触头，静主触头、静弧触头在隔离断路器分闸时位于对应的动主触头、动弧触头上方，静弧触头、动弧触头位于所述静主触头和动主触头内侧，其特征在于：所述的静弧触头和静主触头之间设有可在上下方向上往复移动以在断路器分闸时对所述静弧触头形成屏蔽的屏蔽罩，屏蔽罩底部设有下屏蔽端，屏蔽罩在移动行程上具有在断路器分闸时屏蔽罩的下屏蔽端移动至所述静弧触头下方以对静弧触头形成屏蔽的隔离屏蔽位。
  2. 根据权利要求1所述的隔离断路器用灭弧室，其特征在于：所述的动主触头和动弧触头之间设有随所述动主触头和动弧触头沿上下方向同步移动的喷口，喷口上端延伸至所述动弧触头上方，喷口与所述屏蔽罩传动连接以驱动屏蔽罩沿上下方向往复移动。
  3. 根据权利要求1或2所述的隔离断路器用灭弧室，其特征在于：所述的静弧触头沿上下方向导向移动装配在所述灭弧室中，在所述屏蔽罩和静弧触头之间设有铰接在所述灭弧室中的驱动杠杆，驱动杠杆的两端分别通过曲柄滑块结构与所述屏蔽罩和静弧触头装配。
  4. 根据权利要求3所述的隔离断路器用灭弧室，其特征在于：所述的驱动杠杆两端的两驱动滑块结构具有对应与所述屏蔽罩、静弧触头装配的装配连接部，至少一个曲柄滑块结构的装配连接部沿上下方向导向移动装配在沿上下方向延伸的安装槽中，安装槽对应设置在屏蔽罩、静弧触头上或与所述屏蔽罩、静弧触头固定装配。
  5. 隔离断路器，包括灭弧室，灭弧室中设有沿上下方向对应布置的静主触头、动主触头和静弧触头、动弧触头，静主触头、静弧触头在隔离断路器分闸时位于对应的动主触头、动弧触头上方，静弧触头、动弧触头位于所述静主触头和动主触头内侧，其特征在于：所述的静弧触头和静主触头之间设有可在上下方向上往复移动以在断路器分闸时对所述静弧触头形成屏蔽的屏蔽罩，屏蔽罩底部设有下屏蔽端，屏蔽罩在移动行程上具有在断路器分闸时屏蔽罩的下屏蔽端移动至所述静弧触头下方以对静弧触头形成屏蔽的隔离屏蔽位。
  6. 根据权利要求5所述的隔离断路器，其特征在于：所述的动主触头和动弧触头之间设有随所述动主触头和动弧触头沿上下方向同步移动的喷口，喷口上端延伸至所述动弧触头上方，喷口与所述屏蔽罩传动连接以驱动屏蔽罩沿上下方向往复移动。
  7. 根据权利要求5或6所述的隔离断路器，其特征在于：所述的静弧触头沿上下方向导向移动装配在所述灭弧室中，在所述屏蔽罩和静弧触头之间设有铰接在所述灭弧室中的驱动杠杆，驱动杠杆的两端分别通过曲柄滑块结构与所述屏蔽罩和静弧触头装配。
  8. 根据权利要求7所述的隔离断路器，其特征在于：所述的驱动杠杆两端的两驱动滑块结构具有对应与所述屏蔽罩、静弧触头装配的装配连接部，至少一个曲柄滑块结构的装配连接 部沿上下方向导向移动装配在沿上下方向延伸的安装槽中，安装槽对应设置在屏蔽罩、静弧触头上或与所述屏蔽罩、静弧触头固定装配。
PCT/CN2015/093061 2014-10-31 2015-10-28 隔离断路器用灭弧室及使用该灭弧室的隔离断路器 WO2016066097A1 (zh)

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