CN201514892U - Quick grounding switch device - Google Patents

Quick grounding switch device Download PDF

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Publication number
CN201514892U
CN201514892U CN2009200345158U CN200920034515U CN201514892U CN 201514892 U CN201514892 U CN 201514892U CN 2009200345158 U CN2009200345158 U CN 2009200345158U CN 200920034515 U CN200920034515 U CN 200920034515U CN 201514892 U CN201514892 U CN 201514892U
Authority
CN
China
Prior art keywords
contact
air cylinder
moving contact
grounding switch
switch device
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.)
Expired - Lifetime
Application number
CN2009200345158U
Other languages
Chinese (zh)
Inventor
李振军
尹茂华
阮艳丽
杨夙峰
张震锋
汪勇
史俊
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.)
China XD Electric Co Ltd
Original Assignee
China XD Electric Co Ltd
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 China XD Electric Co Ltd filed Critical China XD Electric Co Ltd
Priority to CN2009200345158U priority Critical patent/CN201514892U/en
Application granted granted Critical
Publication of CN201514892U publication Critical patent/CN201514892U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a quick grounding switch device, which comprises a fixed contact and a moving contact, wherein the fixed contact is arranged on the fixed side, and the moving contact is arranged on the moving side, can linearly move and can be in contact with or be separated from the fixed contact. The moving contact is arranged in a shell. An input crank arm and the driving device of the moving contact are arranged at the upper part of the shell. An air cylinder is connected with the lower part of the shell and is used to generate high-pressure insulation gas for blowing out arc when the quick grounding switch device is opened. An air piston is connected with the rear end of the moving contact. When the quick grounding switch device is opened, the air piston moves inversely to increase the capacity of the air cylinder, the pressure inside the cylinder is lower than the pressure outside the cylinder, and gas is sucked into the air cylinder through a central hole at the front end of the moving contact and a radial hole at the rear end of the moving contact to blow out electric arc produced when the quick grounding switch device is opened. The utility model is characterized in that a pressure relief device used to reduce the rapidly increasing pressure in the air cylinder when the quick grounding switch device is closed, to improve the closing speed and to reduce operational power is arranged on the air piston.

Description

A kind of high speed grounding switch device
Technical field
The utility model relates to a kind of quick earth protective device that is used for Cubicle Gas-Insulated Switchgear (GIS) short trouble, the bigger faradic high speed grounding switch device of particularly a kind of folding.
Background technology
Along with electrical network develops fast, the requirement of switching devices connecting-disconnecting function is more and more higher, high speed grounding switch is cut-off faradic ability also improving.Present high speed grounding switch is made up of the moving contact of band copper tungsten material and fixed contact system, and when the folding em induced current, the generation electric arc electric arc that do not suffer restraints produces drift between moving arcing contact and the quiet arc contact under electrodynamic effect; Simultaneously, gas issues estranged separating in the effect of electric arc, and the insulation property between the dynamic/static contact are weakened, cause bearing the electromagnetic induction voltage ability and reduce, more than the requirement that existing high speed grounding switch can not be satisfied cut-off big opening and closing induction current of two aspects.
Summary of the invention:
For solving the existing the problems referred to above of existing high speed grounding switch, the utility model provides a kind of high speed grounding switch device that cut-offs big induced current ability (1000A) that has.
For reaching above purpose, the utility model takes following technical scheme to be achieved:
A kind of high speed grounding switch device, comprise the fixed contact of quiet side, moving side can along the straight line advance and retreat and with fixed contact contact or the moving contact that separates, moving contact is arranged in the housing, housing top is provided with the drive unit of input connecting lever and moving contact, lower housing portion is used to produce the air cylinder of the High-Voltage Insulation gas of blow-out when connecting a separating brake, the moving contact rear end is connected with displacer, it is characterized in that, displacer is provided with pressure relief device and is used to reduce the interior air pressure of air cylinder, improve closing speed, reduce operating work.Because the volume of air cylinder dwindles the pressure rising of gas in the jar, the pressure relief device on the piston is opened, and has avoided the closing speed reduction, has improved the combined floodgate reliability during combined floodgate; During separating brake, increase the air cylinder volume by the displacer counter motion, in-cylinder pressure is lower than outside the cylinder, makes gas be inhaled in the air cylinder electric arc when separating brake is extinguished in air-blowing by moving contact front end centre bore and rear end radial hole.
In the such scheme, described pressure relief device comprises several axially extending bores in the UNICOM air cylinder chamber that is provided with on the displacer, these through holes are sealed by a cover plate by spring compression when separating brake, during combined floodgate, when the air cylinder internal gas pressure raises, can back down cover plate, pressure is discharged by axially extending bore.
Described fixed contact is arranged in the stationary contact headstock, and fixed contact is provided with the insulation spout that is used to prevent electric arc and discharge harm.This insulation spout is connected with contact base by screw thread.
The utility model has the advantages that, in the separating brake process, drive displacer movement by moving contact, divide generation air-flow extinguish arcs in the process at dynamic and static contact, on displacer, designed pressure relief device, when in-cylinder pressure raises, the pressure relief device effect can reduce the air pressure in the air cylinder, improves closing speed.Quiet side at earthed switch has designed spout simultaneously, and the design of spout length makes electric arc just can be extinguished in spout, has so also avoided the damage to other parts, reaches switch and cut-offs faradic ability.
Description of drawings
Fig. 1 is in the structure cutaway view of gate-dividing state for the utility model.
Fig. 2 is in the structure cutaway view of "on" position for the utility model.
Fig. 3 is the pressure relief device enlarged diagram among Fig. 1, Fig. 2.
Among Fig. 1 to Fig. 3,1, housing, 2, the input connecting lever, 3, displacer, 4, moving contact, 5, air cylinder, 6, the contact of relying on oneself, 7, guide ring, 8, the insulation spout, 9, fixed contact, 10, pressure relief device, 11, spring, 12, cover plate, 13, pressure discharges air-flow.
Embodiment
Below in conjunction with drawings and the specific embodiments the utility model is described in further detail.
The high speed grounding switch device shown in Figure 2 as Fig. 1, air cylinder 5 and displacer 3 have been designed in moving side, rely on oneself contact 6 and guide ring 7 are housed in the air cylinder, guide ring guarantee moving contact 4 motions to neutrality and stationarity, rely on oneself contact 6 with the conduct current housing 1 on the moving contact, be grounded, displacer 3 is installed in moving contact 4 rear ends, designed on the displacer and prevented air cylinder internal pressure elevated pressure releasing device 10, discharge too high pressure by pressure relief device, avoid the reduction of closing speed.Quiet side comprise the stationary contact headstock and in fixed contact 9, designed insulation spout 8 on the fixed contact 9, avoided the harm of electric arc, improved the ability of reliability of products and opening and closing induction current.Insulation spout 8 is connected with contact base by screw thread, and its inboard boss has the effect of restriction fingertip play.
Fig. 1 is the state that device is in the separating brake position, in the time of need carrying out closing operation, operating mechanism arrives moving contact 4 by input connecting lever 2 with transmission of power, moving contact 4 drives the displacer 3 that is fitted thereon and do rectilinear motion in air cylinder 5, because the pressure of air cylinder 5 uprises when closing a floodgate, therefore reduce in-cylinder pressure by pressure relief device (Fig. 3), moving contact is closed a floodgate fast enter spout, extinguish arcs.
As shown in Figure 3, pressure relief device 10 comprises several axially extending bores in the UNICOM air cylinder chamber that is provided with on the displacer 3, these through holes are sealed by a cover plate 12 that compresses by spring 11 when separating brake, during combined floodgate, can back down cover plate 12 by axially extending bore when air cylinder 5 internal gas pressures are too high, pressure discharges air-flow 13 and flows out from axially extending bore.
Fig. 2 is the state that device is in closing position, in the time of need carrying out sub-switching operation, operating mechanism arrives moving contact 4 by input connecting lever 2 with transmission of power, moving contact 4 drives the piston 3 that is fitted thereon and do the reverse linear motion in air cylinder 5, the volume that counter motion by piston increases air cylinder 5 makes the pressure of air cylinder be lower than the outer pressure of air cylinder, in the separating brake process, the gases at high pressure outside the cylinder are sucked in the air cylinder by radial hole 14 (Fig. 3) from moving contact front end centre bore and rearward end, extinguish the electric arc that the separating brake process produces fast by air-flow, reach the purpose of reliable opening and closing induction current in the moving contact central hole.

Claims (4)

1. high speed grounding switch device, the fixed contact that comprises quiet side, moving side can along the straight line advance and retreat and with fixed contact contact or the moving contact that separates, moving contact is arranged in the housing, housing top is provided with the drive unit of input connecting lever and moving contact, lower housing portion is used to produce the air cylinder of the High-Voltage Insulation gas of blow-out when connecting a separating brake, the moving contact rear end is connected with displacer, during separating brake, increase the air cylinder volume by the displacer counter motion, in-cylinder pressure is lower than outside the cylinder, make gas be inhaled in the air cylinder electric arc when separating brake is extinguished in air-blowing by moving contact front end centre bore and rear end radial hole; It is characterized in that displacer is provided with the air pressure that raises rapidly in the air cylinder when being used to reduce to close a floodgate, the pressure relief device that improves closing speed.
2. high speed grounding switch device as claimed in claim 1, it is characterized in that, described pressure relief device comprises several axially extending bores in the UNICOM air cylinder chamber that is provided with on the displacer, these through holes are sealed by a cover plate by spring compression when separating brake, during combined floodgate, when the air cylinder internal gas pressure raises, back down cover plate, pressure is discharged by axially extending bore.
3. high speed grounding switch device as claimed in claim 1 is characterized in that, described fixed contact is arranged in the stationary contact headstock, and fixed contact is provided with the insulation spout that is used to prevent electric arc harm.
4. high speed grounding switch device as claimed in claim 3 is characterized in that, described insulation spout is connected with contact base by screw thread.
CN2009200345158U 2009-09-14 2009-09-14 Quick grounding switch device Expired - Lifetime CN201514892U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009200345158U CN201514892U (en) 2009-09-14 2009-09-14 Quick grounding switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009200345158U CN201514892U (en) 2009-09-14 2009-09-14 Quick grounding switch device

Publications (1)

Publication Number Publication Date
CN201514892U true CN201514892U (en) 2010-06-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009200345158U Expired - Lifetime CN201514892U (en) 2009-09-14 2009-09-14 Quick grounding switch device

Country Status (1)

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CN (1) CN201514892U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104393523A (en) * 2014-11-20 2015-03-04 许继集团有限公司 Gas-insulated switch cabinet fault electric arc limit device and trigger device thereof
CN106384961A (en) * 2016-11-12 2017-02-08 上海天灵开关厂有限公司 Gas insulated bus grounding device
CN112771740A (en) * 2018-10-30 2021-05-07 Ls电气株式会社 Quick grounding switch of gas insulated switchgear
CN114420480A (en) * 2022-01-06 2022-04-29 平高集团有限公司 High-voltage switch equipment with isolation fracture and moving contact component thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104393523A (en) * 2014-11-20 2015-03-04 许继集团有限公司 Gas-insulated switch cabinet fault electric arc limit device and trigger device thereof
CN104393523B (en) * 2014-11-20 2017-01-11 许继集团有限公司 Gas-insulated switch cabinet fault electric arc limit device and trigger device thereof
CN106384961A (en) * 2016-11-12 2017-02-08 上海天灵开关厂有限公司 Gas insulated bus grounding device
CN106384961B (en) * 2016-11-12 2018-07-17 上海天灵开关厂有限公司 A kind of gas insulated bus earthing or grounding means
CN112771740A (en) * 2018-10-30 2021-05-07 Ls电气株式会社 Quick grounding switch of gas insulated switchgear
CN112771740B (en) * 2018-10-30 2023-04-28 Ls电气株式会社 Fast grounding switch of gas-insulated switchgear
CN114420480A (en) * 2022-01-06 2022-04-29 平高集团有限公司 High-voltage switch equipment with isolation fracture and moving contact component thereof
CN114420480B (en) * 2022-01-06 2023-12-08 平高集团有限公司 High-voltage switch equipment with isolation fracture and moving contact assembly thereof

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C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20100623

CX01 Expiry of patent term