CN105762000A - DC load isolation switch - Google Patents

DC load isolation switch Download PDF

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Publication number
CN105762000A
CN105762000A CN201610208830.2A CN201610208830A CN105762000A CN 105762000 A CN105762000 A CN 105762000A CN 201610208830 A CN201610208830 A CN 201610208830A CN 105762000 A CN105762000 A CN 105762000A
Authority
CN
China
Prior art keywords
load
isolation
switch
isolation switch
arc
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201610208830.2A
Other languages
Chinese (zh)
Inventor
刘哲
乐洪有
钟积科
沈文
李明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN CHANGHAI ELECTRICAL TECHNOLOGY DEVELOPMENT Co Ltd
712th Research Institute of CSIC
Original Assignee
WUHAN CHANGHAI ELECTRICAL TECHNOLOGY DEVELOPMENT Co Ltd
712th Research Institute of CSIC
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.)
Filing date
Publication date
Application filed by WUHAN CHANGHAI ELECTRICAL TECHNOLOGY DEVELOPMENT Co Ltd, 712th Research Institute of CSIC filed Critical WUHAN CHANGHAI ELECTRICAL TECHNOLOGY DEVELOPMENT Co Ltd
Priority to CN201610208830.2A priority Critical patent/CN105762000A/en
Publication of CN105762000A publication Critical patent/CN105762000A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02Details
    • H01H31/04Interlocking mechanisms
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10Metal parts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/185Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The invention discloses a DC load isolation switch, which comprises an isolation switch and a load switch, wherein the isolation switch comprises a moving contact busbar and a crankshaft mechanism; an insulated operation rod is connected onto the crankshaft mechanism; isolation knives are arranged on the moving contact busbar; the end part of the insulated operation rod is connected with the isolation knives; conductive wheels are arranged on the isolation knives; the load switch comprises a static contact busbar, a fast operation mechanism and an arc extinguishing chamber; a static contact is arranged on the static contact busbar; and U-shaped conductive forks corresponding to the conductive wheels are arranged on the fast operation mechanism. The DC load isolation switch of the invention adopts a structure form of combining the load switch and the isolation switch, the isolation switch part uses a structure of an upper knife and a lower knife, normal load current in a line can be opened and closed, functions of the isolation switch can be integrated, and the DC load isolation switch has the advantages of compact structure, strong opening ability, convenient mounting and maintenance and the like.

Description

A kind of DC load isolation switch
Technical field
The invention belongs to style direct current switch electric technical field, be specifically related to a kind of DC load isolation switch.
Background technology
At present in domestic and international city rail traffic DC traction power-supply system, contact net structure is divided into conductor rail and two kinds of power-supplying forms of overhead contact line.Overhead contact line power-supplying forms is to utilize on post isolation switch to constitute big two-side feeding, due to isolation switch can not bringing onto load deciliter, therefore when electrical network has fault, power supply station is needed to have a power failure, then close isolation switch, trouble point is exited electrical network, then restarts power supply.This brings inconvenience to city rail traffic undoubtedly, can cause traffic paralysis time serious.
Accordingly, it would be desirable to a kind of DC load isolation switch, substitute isolation switch on original post, can not only cut-off and close the normal duty electric current of circuit, moreover it is possible to the function of integrated isolation switch, form clearly visible fracture.When electrical network is properly functioning, load-break switch remains closed position;When a certain feed subregion needs to have a power failure or overhaul, dispatcher need not disconnect feeder breaker and the isolation switch of supply station, it is possible to only disconnects the load-break switch of this feed subregion as required, it is achieved the independent power-off of this feed subregion.So without influence on the normal power supply of other feed subregions, bring great convenience and fast for power scheduling operation in running.
And existing load-break switch is only applicable to ac power supply system on domestic and international market, it is impossible to meet the breaking capacity requirement that DC traction power-supply system is special.
Summary of the invention
It is an object of the invention to according to the deficiencies in the prior art, it is provided that a kind of DC load isolation switch, there is compact conformation, deciliter ability is strong, be easily installed the features such as maintenance.
nullThe technical solution adopted for the present invention to solve the technical problems is: a kind of DC load isolation switch,Base is supported including insulation,Described insulation is supported to be sequentially installed with on base as an isolation switch of master switch and an on-load switch as arc switch,Described isolation switch includes connecting insulation and supports movable contact bus bar and the crankshaft connecting rod system of base,Crankshaft connecting rod system is connected to insulating bar,Movable contact bus bar is provided with isolation knife,The end of described insulating bar is connected with isolation knife,Isolation knife is provided with conduction wheel,Described on-load switch includes connecting insulation and supports the static contact busbar of base and the fast operating mechanism being loaded on static contact busbar by insulator and arc-chutes,Static contact busbar is provided with static contact,Fast operating mechanism is provided with conduct electricity wheel corresponding U-shaped conduction fork,Achieved a butt joint by the contact of conduction wheel and conduction fork between isolation knife and fast operating mechanism,Conduction fork is connected to moving arcing contact by being flexible coupling,Described on-load switch also includes the static arc contact being connected static contact busbar by copper bar,Static arc contact is connected to auto-excitation type blowout coil.
Described a kind of DC load isolation switch, its isolation knife is formed side by side by two groups of copper bars.
Described a kind of DC load isolation switch, its fast operating mechanism is spring energy-storage operating mechanism.
Described a kind of DC load isolation switch, its fast operating mechanism and arc-chutes are outer equipped with protective cover.
Described a kind of DC load isolation switch, its blowout coil both sides are fixed with magnetic conductive board.
Described a kind of DC load isolation switch, its isolation knife and static contact busbar adopt red copper material.
Described a kind of DC load isolation switch, its arc-chutes are metal gate chip arc-chutes.
The invention has the beneficial effects as follows:
1, load-break switch is combined as the on-load switch of arc switch with one as the isolation switch of master switch by one, isolation switch sections undertakes big electric current current-carrying task, on-load switch part undertakes the task of connecting load and breaking arc, thus having taken into account the feature that current capacity is strong and connection breaking capacity is strong, can not only cut-off and close the normal duty electric current of circuit, moreover it is possible to the function of integrated isolation switch, form clearly visible fracture;
2, adopt the docking mode of pulley and U-shaped fork between isolation knife and fast operating mechanism, connect flexibility and reliability, interface tolerance is big;
3, isolation switch sections adopts upper and lower guillotine type structure, and the material of isolation knife and static contact busbar is red copper, improves electric conductivity, thus reducing temperature rise;Isolation knife is made up of two groups of copper bars side by side, and static contact is held on centre, carries out deciliter with the form of sliding, there is self-cleaning and function of self-tightening, and the sense of current between isolation knife parallel branch is identical, the electromagnetic attraction of generation can strengthen contact pressure, reduces contact resistance.
4, fast operating mechanism adopts energy-stored spring operating mechanism, makes moving arcing contact quick action, greatly improves every electric property and mechanical performance, and spring energy-storage process constitutes arcing contact and first closes the action sequence divided afterwards, it is achieved the mechanical chain of arcing contact and main contact.
5, arc-chutes and fast operating mechanism are all the stand-alone assemblies of seriation, convenient install and safeguard, and volume is little, lightweight, compact conformation, outside adopt totally-enclosed design equipped with protective cover, to adapt to outdoor rugged environment impact.
6, arc-chutes adopt the arc-chutes of metal gate chip, the overvoltage produced when can reduce breaking arc, arcing contact accesses auto-excitation type blowout coil, make switch when disjunction load, blowout coil is connected in series into major loop by electric arc, and the magnetic field that blowout coil produces makes small area analysis electric arc enter arc-chutes, thus meeting switch disjunction small area analysis Capability Requirement, enhance the breaking capacity of switch, and make the nonpolarity requirement of switch wire connection.
Accompanying drawing explanation
Fig. 1 is the structure chart that the present invention isolates switch sections;
Fig. 2 is the structure chart of on-load switch part of the present invention;
Overall structure figure when Fig. 3 is separating brake of the present invention;
Fig. 4 is present invention overall structure figure when closing a floodgate.
Each accompanying drawing is labeled as: 1 movable contact bus bar, 2 isolation knife, 3 conduction wheels, 4 conduction forks, 5 fast operating mechanisms, 6 arc-chutes, 7 moving arcing contacts, 8 static arc contacts, 9 blowout coils, 10 protective covers, 11 insulators, 12 static contact busbars, 12.1 static contacts, base, 14 crankshaft connecting rod systems are supported in 13 insulation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
nullShown in Fig. 4,The invention discloses a kind of DC load isolation switch,Supported base 13 forms as an isolation switch of master switch and an on-load switch as arc switch by being arranged on insulation,Described isolation switch includes connecting insulation and supports movable contact bus bar 1 and the crankshaft connecting rod system 14 of base 13,Crankshaft connecting rod system 14 is connected to insulating bar,Movable contact bus bar 1 is connected with isolation knife 2,Isolation knife 2 is formed side by side by two groups of copper bars,Static contact 12.1 can be held on centre and carry out deciliter with slip form,Isolation knife 2 and static contact busbar 12 adopt red copper material,Improve electric conductivity,Thus reducing temperature rise,The end of described insulating bar is connected with isolation knife 2 middle part,Crankshaft connecting rod system 14 can promote isolation knife 2 counterclockwise to rotate around movable contact bus bar 1,Also isolation knife 2 can be pulled around movable contact bus bar 1 rotationally clockwise,Isolation knife 2 is provided with conduction wheel 3,Described on-load switch includes connecting the static contact busbar 12 that insulation supports base 13 and the fast operating mechanism 5 that the mode supported by insulator 11 is loaded on static contact busbar 12 and metal gate chip arc-chutes 6,Static contact busbar 12 is provided with static contact 12.1,Fast operating mechanism 5 is provided with conduct electricity wheel 3 corresponding U-shaped conduction fork 4,Achieved a butt joint by the contact of conduction wheel 3 and conduction fork 4 between isolation knife 2 and fast operating mechanism 5,Fast operating mechanism 5 is spring energy-storage operating mechanism,Conduction fork 4 triggers fast operating mechanism 5 when rotating,Utilize thermal energy storage process to constitute arcing contact and first close the action sequence divided afterwards,Realize the mechanical interlocking of arcing contact and main contact,Conduction fork 4 is connected to moving arcing contact 7 by being flexible coupling and turns on,Described on-load switch also includes the static arc contact 8 being connected conducting static contact busbar 12 by copper bar,Static arc contact 8 is connected to auto-excitation type blowout coil 9,Blowout coil 9 both sides are fixed with magnetic conductive board,Make switch when disjunction load,Blowout coil 9 is connected in series into major loop by electric arc,The magnetic field that blowout coil 9 produces makes small area analysis electric arc enter arc-chutes 6,Thus meeting switch disjunction small area analysis Capability Requirement,Enhance the breaking capacity of switch,Described fast operating mechanism 5 and arc-chutes 6 are all the stand-alone assemblies of seriation,Convenient installation and maintenance,And it is outer equipped with protective cover 10.
Hereinafter the operating principle of the present invention is described further.
Separating brake process:
Crankshaft connecting rod system 14 rotates under the drive of motor drive mechanism, isolation knife 2 is made to be rotated up by insulating bar, isolation knife 2 departs from static contact 12.1, and electric current all conducts electricity fork 4 through moving arcing contact 7, static arc contact 8 and flows through, the isolation knife 2 not starting the arc, isolation knife 2 drives conduction fork 4 to continue up, fast operating mechanism 5 completes energy storage, and when it moves to certain angle, conduction fork 4 triggers fast operating mechanism 5, driving the quick breaking current of moving arcing contact 7, circuit is in open-circuit condition.
Conduction wheel 3 and conduction fork 4 in final isolation knife 2 separate in the non-loaded state, form significantly visible isolation fracture, complete sub-switching operation.
Making process:
Crankshaft connecting rod system 14 rotates under the drive of motor drive mechanism, isolation knife 2 is made to rotate down by insulating bar, conduction wheel 3 and conduction fork 4 close in the non-loaded state, isolation knife 2 drives conduction fork 4 to continue to move downward, when it moves to certain angle, conduction fork 4 triggers fast operating mechanism 5, and fast operating mechanism 5 completes energy storage and drives moving arcing contact 7 rapid closing, and circuit is in closure state.
Final isolation knife 2 and static contact 12.1 not starting the arc Guan Bi, complete closing operation.
Switch is in when closing state, electric current flows into from static contact 12.1, point two-way, and it is minimum that moving arcing contact 7 is flow through on a road, static arc contact 8 conducts electricity this road electric current of fork 4 to isolation knife 2(), another road, is flowed out from isolation knife 2 to movable contact bus bar 1 from static contact 12.1 directly into isolation knife 2.
The present invention has the connection big electric current of fault, disjunction nominal load current and the big current capacity of short time tolerance, it can not only cut-off and close the normal duty electric current of circuit, can also integrated isolation switch function, form clearly visible fracture, there is compact conformation, breaking capacity is strong, be easily installed the features such as maintenance.
Above-described embodiment is illustrative principles of the invention and effect thereof only; and the embodiment that part is used, for the person of ordinary skill of the art, without departing from the concept of the premise of the invention; can also making some deformation and improvement, these broadly fall into protection scope of the present invention.

Claims (7)

  1. null1. a DC load isolation switch,It is characterized in that: include insulation and support base (13),Described insulation is supported to be sequentially installed with on base (13) as an isolation switch of master switch and an on-load switch as arc switch,Described isolation switch includes connecting insulation and supports movable contact bus bar (1) and the crankshaft connecting rod system (14) of base (13),Crankshaft connecting rod system is connected to insulating bar on (14),Movable contact bus bar (1) is provided with isolation knife (2),The end of described insulating bar is connected with isolation knife (2),Isolation knife (2) is provided with conduction wheel (3),Described on-load switch includes connecting insulation and supports the static contact busbar (12) of base (13) and pass through fast operating mechanism (5) and the arc-chutes (6) that insulator (11) is loaded on static contact busbar (12),Static contact busbar (12) is provided with static contact (12.1),Fast operating mechanism (5) is provided with conduct electricity wheel (3) corresponding U-shaped conduction fork (4),Achieved a butt joint by the contact of conduction wheel (3) and conduction fork (4) between isolation knife (2) and fast operating mechanism (5),Conduction fork (4) is connected to moving arcing contact (7) by being flexible coupling,Described on-load switch also includes the static arc contact (8) being connected static contact busbar (12) by copper bar,Static arc contact (8) is connected to auto-excitation type blowout coil (9).
  2. 2. a kind of DC load isolation switch according to claim 1, it is characterised in that described isolation knife (2) is formed side by side by two groups of copper bars.
  3. 3. a kind of DC load isolation switch according to claim 1, it is characterised in that described fast operating mechanism (5) is spring energy-storage operating mechanism.
  4. 4. a kind of DC load isolation switch according to claim 1, it is characterised in that described fast operating mechanism (5) and arc-chutes (6) are outward equipped with protective cover (10).
  5. 5. a kind of DC load isolation switch according to claim 1, it is characterised in that described blowout coil (9) both sides are fixed with magnetic conductive board.
  6. 6. a kind of DC load isolation switch according to claim 1, it is characterised in that described isolation knife (2) and static contact busbar (12) adopt red copper material.
  7. 7. a kind of DC load isolation switch according to claim 1, it is characterised in that described arc-chutes (6) are metal gate chip arc-chutes.
CN201610208830.2A 2016-04-06 2016-04-06 DC load isolation switch Pending CN105762000A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610208830.2A CN105762000A (en) 2016-04-06 2016-04-06 DC load isolation switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610208830.2A CN105762000A (en) 2016-04-06 2016-04-06 DC load isolation switch

Publications (1)

Publication Number Publication Date
CN105762000A true CN105762000A (en) 2016-07-13

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CN201610208830.2A Pending CN105762000A (en) 2016-04-06 2016-04-06 DC load isolation switch

Country Status (1)

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CN (1) CN105762000A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107546048A (en) * 2016-10-19 2018-01-05 河南众联云科工程技术有限公司 Safe circuit breaker
CN108597934A (en) * 2018-05-23 2018-09-28 苏州上电科电气设备有限公司 A kind of high current inverse parallel disconnecting link
CN109003858A (en) * 2018-09-29 2018-12-14 湖南长高高压开关有限公司 High voltage isolator Rapid arc breaking device and its method of operating in on/off switch
CN110223876A (en) * 2019-07-12 2019-09-10 四川汇友电气有限公司 A kind of electric railway double-fracture disconnecting switch
CN110310858A (en) * 2019-06-28 2019-10-08 江苏省如高高压电器有限公司 A kind of isolation on-load switch arc-chutes executing agency
CN110326079A (en) * 2017-02-22 2019-10-11 西门子股份公司 There are two the switching devices of disconnecting switch and power switch for tool
CN111986949A (en) * 2020-07-22 2020-11-24 国网内蒙古东部电力有限公司电力科学研究院 Isolating load switch
CN112713042A (en) * 2020-12-24 2021-04-27 国家电网有限公司 GW4 type isolating switch for reducing defect frequency of heating conductive loop

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2355423Y (en) * 1998-08-20 1999-12-22 西安东方电气工程研究所 Outdoor vacuum switches with isolating knives
CN103560037A (en) * 2013-10-21 2014-02-05 武汉长海电气科技开发有限公司 Load disconnecting switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2355423Y (en) * 1998-08-20 1999-12-22 西安东方电气工程研究所 Outdoor vacuum switches with isolating knives
CN103560037A (en) * 2013-10-21 2014-02-05 武汉长海电气科技开发有限公司 Load disconnecting switch

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107546048A (en) * 2016-10-19 2018-01-05 河南众联云科工程技术有限公司 Safe circuit breaker
CN110326079A (en) * 2017-02-22 2019-10-11 西门子股份公司 There are two the switching devices of disconnecting switch and power switch for tool
CN110326079B (en) * 2017-02-22 2021-10-22 西门子股份公司 Switching device with two isolating switches and power switch
CN108597934A (en) * 2018-05-23 2018-09-28 苏州上电科电气设备有限公司 A kind of high current inverse parallel disconnecting link
CN108597934B (en) * 2018-05-23 2023-07-07 上科智能电气(苏州)有限公司 Heavy-current anti-parallel disconnecting link
CN109003858A (en) * 2018-09-29 2018-12-14 湖南长高高压开关有限公司 High voltage isolator Rapid arc breaking device and its method of operating in on/off switch
CN109003858B (en) * 2018-09-29 2023-11-07 湖南长高高压开关有限公司 Quick arc breaking device of high-voltage isolating switch and action method of quick arc breaking device during switching-on and switching-off
CN110310858A (en) * 2019-06-28 2019-10-08 江苏省如高高压电器有限公司 A kind of isolation on-load switch arc-chutes executing agency
CN110223876A (en) * 2019-07-12 2019-09-10 四川汇友电气有限公司 A kind of electric railway double-fracture disconnecting switch
CN111986949A (en) * 2020-07-22 2020-11-24 国网内蒙古东部电力有限公司电力科学研究院 Isolating load switch
CN112713042A (en) * 2020-12-24 2021-04-27 国家电网有限公司 GW4 type isolating switch for reducing defect frequency of heating conductive loop

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Application publication date: 20160713

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