CN103681092B - Solid insulation isolation earthing switch device and sealing unit thereof - Google Patents

Solid insulation isolation earthing switch device and sealing unit thereof Download PDF

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Publication number
CN103681092B
CN103681092B CN201310620235.6A CN201310620235A CN103681092B CN 103681092 B CN103681092 B CN 103681092B CN 201310620235 A CN201310620235 A CN 201310620235A CN 103681092 B CN103681092 B CN 103681092B
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China
Prior art keywords
housing
ground connection
major loop
vacuum interrupter
solid insulation
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CN201310620235.6A
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CN103681092A (en
Inventor
王大为
吴小钊
王廷华
师军伟
李鹏
汤清双
张文凯
白维正
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Xuji delischer Electric Co.,Ltd.
State Grid Corp of China SGCC
Xuji Group Co Ltd
Original Assignee
XUCHANG XUJI DRIESCHER WEGBERG ELECTRIC CO Ltd
State Grid Corp of China SGCC
Xuji Group Co Ltd
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Priority to CN201310620235.6A priority Critical patent/CN103681092B/en
Publication of CN103681092A publication Critical patent/CN103681092A/en
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Abstract

The present invention relates to a kind of solid insulation isolation earthing switch device and sealing unit thereof, comprise the solid insulation housing with closed cavity, on this housing, be provided with three-phase isolation earthing switch unit, every facies unit comprises that two major loop terminals being arranged on housing and sealing are positioned at the disconnecting link of cavity the intraparietal ground connection vacuum interrupter of housing and one, the quiet end of ground connection vacuum interrupter is towards cavity, the end of quiet end is installed with the quiet end of isolation that stretches into cavity, and the moved end of ground connection vacuum interrupter is stretched out housing and formed earth terminal outward; The hinged end of described disconnecting link is hinged on the first major loop terminals, the second major loop terminals and the quiet end of described isolation are all positioned on the swinging track of contact jaw of disconnecting link and coordinate with disconnecting link contact jaw break-make, on described housing, be rotatably equipped with the two station disconnecting switch operating axis that drive three disconnecting links to swing, the power intake of operating axis is positioned at outside housing. The present invention possesses high ground short circuit fault current making capability.

Description

Solid insulation isolation earthing switch device and sealing unit thereof
Technical field
The present invention relates to a kind of isolation earthing switch device for pressure solid insulation ring main unit.
Background technology
In recent years, there is a kind of solid insulation ring main unit in Medium voltage switch or circuit breaker field, solid insulation ring main unit is to adopt the switchgear of solid insulating material as major insulation medium, it is little that solid insulation ring main unit has volume, dielectric strength is high, environmental resistance is good, the feature such as environmentally friendly, it is an important development direction of medium voltage switchgear equipment, but isolating switch and earthed switch affect miniaturization and the high reliability developing steps of solid insulation ring main unit always at present, QG/DW730 " the 12kV solid insulation ring main unit technical conditions " centering that State Grid Corporation of China issues presses solid insulation ring main unit to have higher requirement with isolation earthing switch device.
Existing middle pressure solid insulation ring main unit mainly contains three kinds with isolation earthing switch device according to the difference of version and fracture dielectric at present: one is three station vacuum insulation earthed switches, owing to having adopted vacuum fracture to make such three stations vacuum insulation earthed switch structure very compact, and possesses the advantage that adaptive capacity to environment is strong, but existing three position vacuum switch tubes to operating mechanism performance requirement very high cause operating mechanism complex structure and reliability low, isolation fracture distance is little causes user extremely low to its acceptance with the invisible feature of fracture, and therefore these class three station vacuum insulation earthed switches are not widely adopted. the second is Direct Action Type three station isolation grounding switchs of air fracture, such three station isolation grounding switch drives corresponding moving contact to complete connection, isolation and grounding function by rack-and-pinion or nut screw transmission mechanism, stable and reliable for performance, manufacturing process is simple and the degree of modularity is high, but the Direct Action Type of such air fracture three station isolation grounding switch volumes are large, and rack-and-pinion or nut screw transmission mechanism can not drive moving contact to realize quick crowbar short-circuit current function, so earthed switch does not possess short-circuit current making capability, when solid insulation ring main unit adopts such isolation earthing switch, need to close short-circuit current by main switch, cause complex operation and interlocking complicated. the third is rotary three station isolation grounding switchs of air fracture, such three station isolation grounding switch drives the rotated to an angle connection of isolation earthing switch of connecting lever by operating axis, isolation and grounding function, overall performance is reliable and stable, isolation switch manufacturing process is simple and the degree of modularity is high, but the rotary three station isolation grounding switch volumes of such air fracture are large, the long rotary inertia of isolation switch is large, the function that realizes quick crowbar short-circuit current has just proposed very high requirement and has been not easy to realize to operating axis and operating mechanism, so far also do not occur one and there is the successful case that closes short-circuit current function.
Summary of the invention
The object of this invention is to provide a kind of solid insulation isolation earthing switch device that closes short circuit current ability that has. The present invention provides the sealing unit of this solid insulation isolation earthing switch device simultaneously.
For achieving the above object, solid insulation isolation earthing switch device of the present invention adopts following technical scheme: solid insulation isolation earthing switch device, comprise the solid insulation housing with closed cavity, on this housing, be provided with three-phase isolation earthing switch unit, every facies unit comprises that two major loop terminals being arranged on housing and sealing are positioned at the disconnecting link of cavity the intraparietal ground connection vacuum interrupter of housing and one, the quiet end of ground connection vacuum interrupter is towards cavity, the end of quiet end is installed with the quiet end of isolation that stretches into cavity, the moved end of ground connection vacuum interrupter is stretched out housing and is formed earth terminal outward, the hinged end of described disconnecting link is hinged on the first major loop terminals, the second major loop terminals and the quiet end of described isolation are all positioned on the swinging track of contact jaw of disconnecting link and coordinate with disconnecting link contact jaw break-make, on described housing, be rotatably equipped with the two station disconnecting switch operating axis that drive three disconnecting links to swing, the power intake of operating axis is positioned at outside housing.
Described ground connection vacuum interrupter is two station vacuum arc extinguish chambers.
Described the second major loop terminals and ground connection vacuum interrupter are all positioned on the housing body wall of the first major loop terminals offside.
The outer surface of described solid insulation housing has conduction or semiconductive shielding layer.
The sealing unit of solid insulation isolation earthing switch device of the present invention adopts following technical scheme: the sealing unit of solid insulation isolation earthing switch device, comprise the solid insulation housing with closed cavity, on this housing, be provided with two major loop terminals and sealing are positioned at cavity disconnecting link the intraparietal ground connection vacuum interrupter of housing and one, the quiet end of ground connection vacuum interrupter is towards cavity, the end of quiet end is installed with the quiet end of isolation that stretches into cavity, and the moved end of ground connection vacuum interrupter is stretched out housing and formed earth terminal outward; The hinged end of described disconnecting link is hinged on the first major loop terminals, the second major loop terminals and the quiet end of described isolation are all positioned on the swinging track of contact jaw of disconnecting link and coordinate with disconnecting link contact jaw break-make, described housing is provided with the axis hole of two station disconnecting switch operating axis that drives disconnecting link to swing for rotating assembling, and the hinged end of described disconnecting link is provided with for the syndeton being in transmission connection with described two station disconnecting switch operating axis.
Described ground connection vacuum interrupter is two station vacuum arc extinguish chambers.
Described the second major loop terminals and ground connection vacuum interrupter are all positioned on the housing body wall of the first major loop terminals offside.
The outer surface of described solid insulation housing has conduction or semiconductive shielding layer.
The present invention adopts solid insulation housing to make supporter and has formed a closed cavity, by two major loop terminals, disconnecting link, isolator operation axle and isolate quiet end and form isolating switch, by vacuum interrupter ground connection. Isolating switch is positioned at cavity inside, and isolating switch fracture is air fracture, and isolating switch has the dual resisteance function to major loop and earth-return circuit; When use, driving disconnecting link to swing isolating switch by actuating isolator operation axle connects, isolates, be grounded the disjunction in loop and close by actuating ground connection vacuum interrupter divide-shut brake, no matter this structure is to compare with Direct Action Type air fracture earthed switch or rotation disconnecting link formula air fracture earthed switch, the present invention not only can effectively reduce taking up room of earthed switch, and reliability is higher, ground connection vacuum interrupter has very strong short-circuit current making capability. In addition, the sealing of ground connection vacuum interrupter is enclosed in insulation shell body wall, surrounded by solid insulation material, make solid insulation housing form the structure of an airtight die cavity and interface insulation, can reduce so in use the entirety office of solid insulation ring main unit high-volume, improve the electric property of isolation earthing switch device. Isolation earthing switch device of the present invention has connection, isolation, three kinds of functions of ground connection, simple in structure, reliability is high, versatility good, environment resistant good, miniaturization and possess high ground short circuit fault current making capability.
Brief description of the drawings
Fig. 1 is the on-state schematic diagram of a kind of embodiment of solid insulation isolation earthing switch device of the present invention;
Fig. 2 is the isolation schematic diagram of Fig. 1 device;
Fig. 3 is the ground state schematic diagram of Fig. 1 device.
Detailed description of the invention
The embodiment of solid insulation isolation earthing switch device of the present invention is shown in shown in Fig. 1-Fig. 3, this embodiment comprises the solid insulation housing 1 with closed cavity, on this housing, be provided with three-phase isolation earthing switch unit, every facies unit includes isolating switch 2 and ground connection vacuum interrupter 3, isolating switch 2 comprises two major loop terminals 2-1 and 2-4 that are arranged on housing 1 and the disconnecting link 2-2 that is positioned at cavity inside, one end of disconnecting link is hinged on the first major loop terminals 2-4, on housing 1, be rotatably equipped with the two station disconnecting switch operating axis 2-3 that drive three disconnecting links to swing, this operating axis is coaxial with the hinge axes of three disconnecting links, the hinged end of three disconnecting links and operating axis 2-3 are in transmission connection, the power intake of operating axis 2-3 is positioned at outside housing.
Ground connection vacuum interrupter 3 is two station ground connection Special vacuum arc-chutes, it is surrounded at the inner insulated body of solid insulation housing body wall by sealing, the quiet end of ground connection vacuum interrupter is that static contact of grounding switch 3-1 is towards cavity setting, the end of static contact 3-1 is installed with the quiet end 2-5 of isolation that stretches into cavity, the moved end of ground connection vacuum interrupter is that the moving contact 3-2 of earthed switch stretches out housing and forms earth terminal 3-3 outward, this end is for being in transmission connection and directly driving moving contact of grounding switch 3-2 to be grounded vacuum interrupter 3 divide-shut brakes to be grounded the disjunction in loop and to close with earthed switch operating axis. the second major loop terminals 2-1 and the quiet end 2-5 of isolation are all positioned on the swinging track of disconnecting link contact jaw, isolator operation axle 2-3 rotating drive disconnecting link 2-2 at the second major loop terminals 2-1 and isolate between quiet end 2-5 swing and with it break-make coordinate and realize isolating switch 2 and connect, isolate.
In the present embodiment, the first major loop terminals 2-4 is arranged on the downside body wall of housing, and the second major loop terminals 2-1 and ground connection vacuum interrupter 3 are all arranged on the upside body wall of housing, can reduce like this anglec of rotation of disconnecting link; Isolating switch 2 is that two stations rotate at a slow speed disconnecting link, operating axis 2-3 driving isolation disconnecting link 2-2 rotates to an angle and can complete connection, the isolation of isolating switch 2, the anglec of rotation is little, operating physical force is little and easily realize the air insulation port distance of 150mm, reduce design difficulty and the processing cost of isolating switch operating mechanism, improved the reliability and feasibility of device. Certainly, in other embodiments, the second major loop terminals 2-1 and ground connection vacuum interrupter 3 also can be separately positioned on the adjacent body wall of solid insulation housing.
In the present embodiment, solid insulation housing 1 is formed by insulating materials cast, it has a side cover structure, after assembling disconnecting link, close and form an airtight cavity structure, ensured that isolation earthing switch device is not subject to the impact of external environment condition, make isolation earthing switch device can be under environmental condition filthy and that condensation is more serious reliably working.
In the present embodiment, on the insulating materials outer surface of solid insulation housing 1, be coated with conduction or semiconductive shielding layer and be communicated with after reliable ground, ensured the palp position of people reliable ground, thereby ensured maintainer's etc. personal safety.
Above-mentioned solid insulation isolation earthing switch device has connection, isolation, three kinds of functions of ground connection, and its course of work is as follows:
Figure 1 shows that on-state, isolating switch 2 closes a floodgate, ground connection vacuum interrupter 3 separating brakes, isolator operation axle 2-3 is rotated counterclockwise certain angle and drives disconnecting link 2-2 to contact with major loop terminals 2-1, this state major loop is connected, simultaneously major loop forms an air insulated port and earthed switch in gate-dividing state to earth-return circuit, has very high security.
Figure 2 shows that isolation, isolating switch 2 separating brakes, ground connection vacuum interrupter 3 separating brakes, the isolator operation axle 2-3 certain angle that turns clockwise drives disconnecting link 2-2 to contact with isolating quiet end 2-5, and this state major loop is in isolation, and earthed switch is in gate-dividing state.
Figure 3 shows that ground state, isolating switch 2 separating brakes, ground connection vacuum interrupter 3 close a floodgate, earthed switch operating axis drives moving contact of grounding switch 3-2 to move down with static contact of grounding switch 3-1 and contacts, and this state major loop is in isolation, and earthed switch is in "on" position.
The embodiment of the sealing unit of solid insulation isolation earthing switch device of the present invention: this sealing unit is the solid insulation isolation earthing switch apparatus structure that is derived from three-phase, have an independently device for phase structure of one's own, this device is, on a solid insulation housing independently with closed cavity, single-phase isolation earthing switch is set, the structure of this single-phase isolation earthing switch is identical with the isolation earthing switch cellular construction in above-mentioned solid insulation isolation earthing switch device embodiment, the difference of the present embodiment and solid insulation isolation earthing switch device is, on this housing, do not assemble isolator operation axle, but on its solid insulation housing, be provided with the axis hole that drives two station disconnecting switch operating axis of disconnecting link swing for rotating assembling, on the hinged end of disconnecting link, be also provided with for the syndeton being in transmission connection with two station disconnecting switch operating axis, axis hole structure and syndeton can adopt existing known technology to realize.

Claims (8)

1. solid insulation isolation earthing switch device, it is characterized in that: comprise have closed cavity, poured into a mould the solid insulation housing forming by insulating materials, on this housing, be provided with three-phase isolation earthing switch unit, every facies unit comprises that two major loop terminals being arranged on housing and sealing are positioned at the disconnecting link of cavity the intraparietal ground connection vacuum interrupter of housing and one, the quiet end of ground connection vacuum interrupter is towards cavity, the end of quiet end is installed with the quiet end of isolation that stretches into cavity, and the moved end of ground connection vacuum interrupter is stretched out housing and formed earth terminal outward, the hinged end of described disconnecting link is hinged on the first major loop terminals, the second major loop terminals and the quiet end of described isolation are all positioned on the swinging track of contact jaw of disconnecting link and coordinate with disconnecting link contact jaw break-make, on described housing, be rotatably equipped with the two station disconnecting switch operating axis that drive three disconnecting links to swing, the power intake of operating axis is positioned at outside housing, the second major loop terminals and ground connection vacuum interrupter are all arranged on the upside body wall of housing, the part between described the second major loop terminals and ground connection vacuum interrupter of described upside body wall has the gradient of transition, the position of described ground connection vacuum interrupter is higher than described the second residing position of major loop terminals.
2. solid insulation isolation earthing switch device according to claim 1, is characterized in that: described ground connection vacuum interrupter is two station vacuum arc extinguish chambers.
3. solid insulation isolation earthing switch device according to claim 1 and 2, is characterized in that: described the second major loop terminals and ground connection vacuum interrupter are all positioned on the housing body wall of the first major loop terminals offside.
4. solid insulation isolation earthing switch device according to claim 1 and 2, is characterized in that: the outer surface of described solid insulation housing has conduction or semiconductive shielding layer.
5. the sealing unit of solid insulation isolation earthing switch device, it is characterized in that: comprise have closed cavity, poured into a mould the solid insulation housing forming by insulating materials, on this housing, be provided with two major loop terminals and sealing are positioned at cavity disconnecting link the intraparietal ground connection vacuum interrupter of housing and one, the quiet end of ground connection vacuum interrupter is towards cavity, the end of quiet end is installed with the quiet end of isolation that stretches into cavity, and the moved end of ground connection vacuum interrupter is stretched out housing and formed earth terminal outward, the hinged end of described disconnecting link is hinged on the first major loop terminals, the second major loop terminals and the quiet end of described isolation are all positioned on the swinging track of contact jaw of disconnecting link and coordinate with disconnecting link contact jaw break-make, described housing is provided with the axis hole that drives two station disconnecting switch operating axis of disconnecting link swing for rotating assembling, the hinged end of described disconnecting link is provided with for the syndeton being in transmission connection with described two station disconnecting switch operating axis, the second major loop terminals and ground connection vacuum interrupter are all arranged on the upside body wall of housing, the part between described the second major loop terminals and ground connection vacuum interrupter of described upside body wall has the gradient of transition, the position of described ground connection vacuum interrupter is higher than described the second residing position of major loop terminals.
6. the sealing unit of solid insulation isolation earthing switch device according to claim 5, is characterized in that: described ground connection vacuum interrupter is two station vacuum arc extinguish chambers.
7. according to the sealing unit of the solid insulation isolation earthing switch device described in claim 5 or 6, it is characterized in that: described the second major loop terminals and ground connection vacuum interrupter are all positioned on the housing body wall of the first major loop terminals offside.
8. according to the sealing unit of the solid insulation isolation earthing switch device described in claim 5 or 6, it is characterized in that: the outer surface of described solid insulation housing has conduction or semiconductive shielding layer.
CN201310620235.6A 2013-11-29 2013-11-29 Solid insulation isolation earthing switch device and sealing unit thereof Active CN103681092B (en)

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CN103681092B true CN103681092B (en) 2016-05-25

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104104027B (en) * 2014-07-11 2017-02-01 江苏硕德电力技术有限公司 Solid insulation switch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528770A1 (en) * 1985-08-10 1987-02-19 Driescher Eltech Werk Medium-voltage switching installation
CN103219666A (en) * 2013-05-08 2013-07-24 北京京东方真空电器有限责任公司 Modular solid insulation ring network cabinet
CN103346504A (en) * 2013-07-17 2013-10-09 宁波天安(集团)股份有限公司 Three-position solid insulation switchgear
CN103368096A (en) * 2013-06-26 2013-10-23 国家电网公司 Solid insulation ring main unit
CN203301033U (en) * 2013-05-08 2013-11-20 北京京东方真空电器有限责任公司 Modularized solid insulating ring main unit
CN203617210U (en) * 2013-11-29 2014-05-28 国家电网公司 Solid insulating isolation grounding switch device and solid sealed unit thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3528770A1 (en) * 1985-08-10 1987-02-19 Driescher Eltech Werk Medium-voltage switching installation
CN103219666A (en) * 2013-05-08 2013-07-24 北京京东方真空电器有限责任公司 Modular solid insulation ring network cabinet
CN203301033U (en) * 2013-05-08 2013-11-20 北京京东方真空电器有限责任公司 Modularized solid insulating ring main unit
CN103368096A (en) * 2013-06-26 2013-10-23 国家电网公司 Solid insulation ring main unit
CN103346504A (en) * 2013-07-17 2013-10-09 宁波天安(集团)股份有限公司 Three-position solid insulation switchgear
CN203617210U (en) * 2013-11-29 2014-05-28 国家电网公司 Solid insulating isolation grounding switch device and solid sealed unit thereof

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Address after: 100017 Beijing Xicheng District West Chang'an Avenue 86

Patentee after: STATE GRID CORPORATION OF CHINA

Patentee after: XJ Group Corp.

Patentee after: Xuji delischer Electric Co.,Ltd.

Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District

Patentee before: State Grid Corporation of China

Patentee before: XJ Group Corp.

Patentee before: XUCHANG XUJI DRIESCHER WEGBERG ELECTRIC Co.,Ltd.

CP03 Change of name, title or address