CN204189700U - A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground - Google Patents

A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground Download PDF

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Publication number
CN204189700U
CN204189700U CN201420670422.5U CN201420670422U CN204189700U CN 204189700 U CN204189700 U CN 204189700U CN 201420670422 U CN201420670422 U CN 201420670422U CN 204189700 U CN204189700 U CN 204189700U
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CN
China
Prior art keywords
busbar
vacuum interrupter
load
realizes
station
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 - Fee Related
Application number
CN201420670422.5U
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Chinese (zh)
Inventor
张交锁
陈涛
王家耀
国世峥
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SHENYANG HUADE HIGH-TECH ELECTRIC Co Ltd
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SHENYANG HUADE HIGH-TECH ELECTRIC Co Ltd
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Priority to CN201420670422.5U priority Critical patent/CN204189700U/en
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Publication of CN204189700U publication Critical patent/CN204189700U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground, overcoming prior art relies on vacuum interrupter to close and realize load-side ground connection, operating personnel intuitively cannot see that Grounding easily produces misoperation and needs outer hanging earthing conductor when operating mechanism machine goes wrong, operate inconvenience, the problem that potential safety hazard is large, feature is hinged with connection busbar in the both sides, front and back of load seat, and by vacuum interrupter be connected busbar pinned connection, connection bus is electrically connected with grounding base and realizes main ground connection, vacuum interrupter is electrically connected with grounding base and realizes auxiliary earth, beneficial effect is that main ground connection process operator can see intuitively, and structure is simple, easy to operate, safe and reliable, and achieve and only bear interrupting process by vacuum interrupter, by vacuum interrupter and insulating gas shared power frequency and lightning impulse withstand voltage after cut-offfing, reduce the probability that NSDD phenomenon produces, improve the safety in operation of switchgear.

Description

A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground
Technical field
The utility model belongs to switchgear technical field, and particularly a kind of employing connects the three station vacuum switches that busbar realizes load-side external ground.
Background technology
Existing vacuum switch comprises bus, vacuum interrupter, load conductor, earthing conductor, three-station (isolated bit, interposition and ground connection position) and operating mechanism, drives vacuum interrupter realization deciliter by operating mechanism.
Application number is CN200710103519.2, the patent of invention that corresponding application number is US20060360273 discloses one provides current interruptions, the three-position vacuum switch of isolation and ground connection, this three-position vacuum switch comprises line bus, vacuum interrupter, load conductor, earthing conductor and operating mechanism, described vacuum interrupter comprises quiet electric conductor, electrical conductor and insulating cylinder, wherein fixed contact and moving contact are positioned at insulating cylinder, moving contact can move between the closed circuit position be electrically connected with fixed contact and the open circuit position be separated with fixed contact, load conductor is electrically connected to electrical conductor, the structure of operating mechanism is: (a) to be contacted with fixed contact by moving contact and disconnect closing and disconnecting of realizing circuit, and (b) Mobile vacuum arc control device between primary importance (i.e. circuit turn-on position) and the second place (i.e. load-side earthing position) described in it, wherein when primary importance, this quiet electric conductor is electrically connected to circuit busbar, when the second place, this quiet electric conductor is electrically connected to earthing conductor.In conjunction with its accompanying drawing 3D, 3E, 4D and 4E is known, when by load conductor side joint ground, first disjunction vacuum interrupter is needed, rotatory vacuum arc control device are connected to quiet electric conductor and earthing conductor again, again vacuum interrupter is closed a floodgate, load-side ground connection could be realized, such Problems existing is: carrying ground process due to vacuum interrupter completely closed, operating personnel can be caused intuitively cannot to see Grounding and produce misoperation, and when operating mechanism machinery or electric aspect go wrong, combined floodgate ground connection cannot be realized, need outer hanging earthing conductor, the trouble that operates inconvenience, potential safety hazard is larger, and known in conjunction with its accompanying drawing 6B and 6C, be first disjunction vacuum interrupter equally, then vertical downward movement vacuum interrupter to quiet electric conductor and earthing conductor is connected, then vacuum interrupter is closed a floodgate, load-side ground connection could be realized, there is above-mentioned same problem.This scheme is after quiet electric conductor and earthing conductor are connected, and vibrations can appear in vacuum interrupter when it closes a floodgate again, and in order to ensure that vacuum interrupter is well fixed, be unlikely to occur vibrations when it closes a floodgate, need external holding device, complex structure, cost is higher.
In addition, in traditional vacuum switchgear, because vacuum interrupter not only bears the function of drop-out current, and bear the function of insulation withstand voltage, cause easily occurring the non-maintenance disruptive discharge of NSDD() phenomenon, affect the fail safe of equipment.
Summary of the invention
Problem to be solved in the utility model is, overcome deficiency and the defect of prior art existence, there is provided a kind of structure simple, cost is low, fail safe is high, operating personnel can see load-side ground connection process intuitively, and when can avoid vacuum interrupter divide-shut brake occur vibrations a kind of adopt connect busbar realize load-side external ground three station vacuum switches.
The technical solution adopted in the utility model comprises conductive seat, vacuum interrupter, load seat, grounding base and driving shaft, connection busbar is hinged with in the both sides, front and back of load seat, described connection busbar one end is fixedly connected with driving shaft, and the top electrical conductor of vacuum interrupter being exposed to outside insulating cylinder one section be connected busbar pinned connection, between bearing pin and electrical conductor, back-moving spring is installed, in the movable one end connecting busbar, limit spring is installed.
Described vacuum interrupter and connection busbar realize main line and cut-off and three-station function; Connection bus is electrically connected with grounding base and realizes main ground connection, and vacuum interrupter is electrically connected with grounding base and realizes auxiliary earth.
The interposition of three-station is formed when quiet plug on the quiet electric conductor of described vacuum interrupter is between described conductive seat and grounding base, namely isolate point position and ground connection and divide position, the quiet plug on described quiet electric conductor and form the visual ground connection fracture of three-station between grounding base.
Described vacuum interrupter is separated with conductive seat and realizes isolating a point position, realizes from closing a floodgate under its self-closing power effect, and relies on back-moving spring and limit spring to realize cut-offfing rear reset.
The cut-offfing of described vacuum interrupter realizes three-station function with the rotation being connected busbar and drives by a driving mechanism.
Described vacuum interrupter only bears drop-out current process, and insulating gas bears power frequency and lightning impulse withstand voltage.
Compared with prior art, the beneficial effects of the utility model are:
(1) the utility model realizes cut-offfing of main bus bar and three-station function by be rotatably connected busbar and vacuum interrupter, and adopt connection busbar to realize the external ground of load-side, i.e. main ground connection, this process operator can see intuitively, and cut-offfing of vacuum interrupter realizes three-station function with the rotation being connected busbar and drives by a driving mechanism, structure is simple, easy to operate, realizes load-side grounding safety reliable than employing vacuum interrupter combined floodgate.
(2) the utility model also carries auxiliary earth, when connecting busbar and grounding base connects, vacuum interrupter can be automatically closed under the effect of self-closing power, achieve auxiliary earth, and this process vacuum interrupter that first closes a floodgate after quiet electric conductor ground connection unlike background technology patent realizes carrying ground, safe and reliable, easy to operate.
(3) when operating mechanism occur machinery or electric fault, cause cannot ground connection time, the utility model manual operation can realize load-side reliable ground.
(4) the utility model bridge joint ground Switch Controller vacuum interrupter has support fixation, can cancel holding device, and make structure simple, cost reduces.
(5) the utility model vacuum interrupter only bears interrupting process, by vacuum interrupter and insulating gas shared power frequency and lightning impulse withstand voltage after cut-offfing, greatly reduces and occurs the non-maintenance disruptive discharge of NSDD() probability of phenomenon.
Accompanying drawing explanation
Fig. 1 is the utility model circuit turn-on structural representation,
Fig. 2 is the vertical view of Fig. 1,
Fig. 3 is the disjunction of the utility model circuit and isolation is closed by disconnected position schematic diagram,
Fig. 4 be the disjunction of the utility model circuit and vacuum interrupter to close a floodgate schematic diagram,
Fig. 5 is the disjunction of the utility model circuit and vacuum interrupter has resetted schematic diagram,
Fig. 6 is the disjunction of the utility model circuit and is in load-side ground connection schematic diagram.
In figure:
1. conductive seat,
2. vacuum interrupter,
The quiet electric conductor of 2-1., the quiet plug of 2-1-1., 2-2. fixed contact,
2-3. electrical conductor, 2-4. moving contact,
2-5. insulating cylinder, the quiet end cap of 2-6.,
2-7. moved end is covered, 2-8. bellows,
3. load seat, 4. connects busbar, 5. grounding base, 6. driving shaft,
7. bearing pin, 8. back-moving spring, 9. limit spring.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
As depicted in figs. 1 and 2, the utility model comprises conductive seat 1, vacuum interrupter 2, load seat 3 and grounding base 5, be hinged with in the both sides, front and back of load seat 3 and connect busbar 4, connect busbar 4 one end to be fixedly connected with driving shaft 6, connect busbar 4 can under the effect of operating mechanism with driving shaft 6 for the center of circle rotation, described vacuum interrupter 2 is by electrical conductor 2-3, moving contact 2-4, quiet electric conductor 2-1, fixed contact 2-2, insulating cylinder 2-5, quiet end cap 2-6, moved end lid 2-7 and bellows 2-8 forms, described electrical conductor 2-3 and moving contact 2-4 is integrally welded, a part of electrical conductor 2-3 is exposed to outside insulating cylinder 2-5, and top electrical conductor 2-3 being exposed to outside insulating cylinder 2-5 one section be connected busbar 4 and connected by bearing pin 7, and between bearing pin 7 and electrical conductor 2-3, back-moving spring 8 is installed, back-moving spring 8 one end is connected on bearing pin 7, the other end is crimped on electrical conductor 2-3, in the movable one end connecting busbar 4, limit spring 9 is installed simultaneously, one section of described electrical conductor 2-3 welding moving contact 2-4 is positioned at insulating cylinder 2-5, at welding moved end, insulating cylinder 2-5 bottom lid 2-7, welding bellows 2-8 between the lid 2-7 and electrical conductor 2-3 of moved end simultaneously, form hermetically-sealed construction, described quiet electric conductor 2-1 and fixed contact 2-2 is integrally welded, and a part of quiet electric conductor 2-1 is exposed to outside insulating cylinder 2-5, the top being exposed to outside insulating cylinder 2-5 one section at quiet electric conductor 2-1 is processed with quiet plug 2-1-1, one section of quiet electric conductor 2-1 welding fixed contact 2-2 is positioned at the insulating cylinder 2-5 of sealing, quiet end cap 2-6 is welded in insulating cylinder 2-5 upper end, quiet electric conductor 2-1 is welded in quiet end cap 2-6 centre bore, form hermetically-sealed construction, be vacuum state in vacuum interrupter 2 during use, moving contact 2-4 can in insulating cylinder 2-5 moving linearly, thus the cut-offfing and conducting of realizing circuit.
As shown in Figure 5, the isolation fracture of three-station is formed between quiet plug 2-1-1 on described conductive seat 1 and quiet electric conductor 2-1, the interposition of three-station is formed when the quiet plug 2-1-1 on quiet electric conductor 2-1 is between conductive seat 1 and grounding base 5, namely isolate point position and ground connection and divide position, the quiet plug 2-1-1 on described quiet electric conductor 2-1 and form the ground connection fracture of three-station between grounding base 5.
Described vacuum interrupter 2 only bears drop-out current process, and insulating gas bears power frequency and lightning impulse withstand voltage.
Use procedure is as follows:
The first step is illustrated in figure 1 circuit turn-on state, and vacuum interrupter 2 is in co-bit, conductive seat 1 and the quiet plug 2-1-1 grafting on quiet electric conductor 2-1, realizes three-station isolation and closes;
Second step is illustrated in figure 3 circuit disjunction and isolation is closed by separated position, now connect busbar 4 and rotate near interposition, moving contact 2-4 separates with fixed contact 2-2, realizing circuit cut-offs, load-side is not charged, now three-station is in isolation conjunction by separated position, and the quiet plug 2-1-1 namely on quiet electric conductor 2-1 will thread off with conductive seat 1 and separate;
3rd step be illustrated in figure 4 circuit disjunction and vacuum interrupter from "on" position, three-station mediates position, namely isolation point position and ground connection divide position, quiet plug 2-1-1 now on quiet electric conductor 2-1 thoroughly separates with conductive seat 1, realize isolation point, and under the effect of back-moving spring 8, vacuum interrupter 2 rotating to connection busbar 4, vacuum interrupter 2 realizes from closing a floodgate under the effect of self-closing power simultaneously;
4th step is illustrated in figure 5 circuit disjunction and vacuum interrupter reset mode, now vacuum interrupter 2 rotates to parallel with connection busbar 4, i.e. vacuum interrupter 2 reset mode, and can not overshoot when ensureing that vacuum interrupter 2 resets by limit spring 9, and back-moving spring 8 ensures that vacuum interrupter 2 can not rebound after resetting;
5th step is illustrated in figure 6 circuit disjunction and is in load-side ground state, quiet plug 2-1-1 now on quiet electric conductor 2-1, connect busbar 4 to be electrically connected with grounding base 5, realize carrying ground, i.e. three-station ground connection co-bit, not only achieve to connect the main ground connection that busbar 4 is external ground, the i.e. visual ground connection of operating personnel, and to achieve with vacuum interrupter 2 be the auxiliary earth of interior ground connection, eliminate the final step in referenced patents CN200710103519.2, namely after quiet conductor ground connection, the vacuum interrupter that closes a floodgate again realizes carrying ground, therefore this patent not only has the visual main ground connection of operating personnel, also has vacuum interrupter from the auxiliary earth of closing a floodgate, safe and reliable, structure is simple.
Described conductive seat 1, quiet electric conductor 2-1, quiet plug 2-1-1, fixed contact 2-2, electrical conductor 2-3, moving contact 2-4, load seat 3, connection busbar 4 and grounding base 5 are good conductive body.

Claims (6)

1. the three station vacuum switches adopting connection busbar to realize load-side external ground, comprise conductive seat (1), vacuum interrupter (2), load seat (3), grounding base (5) and driving shaft (6), it is characterized in that, be hinged with in the both sides, front and back of load seat (3) and connect busbar (4), described connection busbar (4) one end is fixedly connected with driving shaft (6), and the top electrical conductor (2-3) of vacuum interrupter (2) being exposed to one section, insulating cylinder (2-5) outside be connected busbar (4) bearing pin (7) and connect, back-moving spring (8) is installed between bearing pin (7) and electrical conductor (2-3), in the movable one end connecting busbar (4), limit spring (9) is installed.
2. a kind of employing connects the three station vacuum switches that busbar realizes load-side external ground according to claim 1, it is characterized in that, described vacuum interrupter (2) and connection busbar (4) realize main line and cut-off and three-station function; Described connection bus (4) is electrically connected with grounding base (5) and realizes main ground connection, and described vacuum interrupter (2) is electrically connected with grounding base (5) and realizes auxiliary earth.
3. a kind of employing connects the three station vacuum switches that busbar realizes load-side external ground according to claim 1, it is characterized in that, quiet plug (2-1-1) on the quiet electric conductor (2-1) of described vacuum interrupter (2) forms the interposition of three-station when being positioned between described conductive seat (1) and grounding base (5), namely isolate point position and ground connection and divide position, the quiet plug (2-1-1) on described quiet electric conductor (2-1) and form the visual ground connection fracture of three-station between grounding base (5).
4. a kind of employing connects the three station vacuum switches that busbar realizes load-side external ground according to claim 1, it is characterized in that, described vacuum interrupter (2) is separated with conductive seat (1) and realizes isolating a point position, realize under its self-closing power effect from closing a floodgate, and rely on back-moving spring (8) and limit spring (9) to realize cut-offfing rear reset.
5. a kind of employing connects the three station vacuum switches that busbar realizes load-side external ground according to claim 1, it is characterized in that, the cut-offfing of described vacuum interrupter (2) realizes three-station function with the rotation being connected busbar (4) and drives by a driving mechanism.
6. a kind of employing connects the three station vacuum switches that busbar realizes load-side external ground according to claim 3, and it is characterized in that, described vacuum interrupter (2) only bears drop-out current process, and insulating gas bears power frequency and lightning impulse withstand voltage.
CN201420670422.5U 2014-11-12 2014-11-12 A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground Expired - Fee Related CN204189700U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420670422.5U CN204189700U (en) 2014-11-12 2014-11-12 A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420670422.5U CN204189700U (en) 2014-11-12 2014-11-12 A kind of employing connects the three station vacuum switches that busbar realizes load-side external ground

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319166A (en) * 2014-11-12 2015-01-28 沈阳华德海泰电器有限公司 Three-position vacuum switch for achieving load-side external grounding by adopting connecting busbars

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319166A (en) * 2014-11-12 2015-01-28 沈阳华德海泰电器有限公司 Three-position vacuum switch for achieving load-side external grounding by adopting connecting busbars
WO2016074525A1 (en) * 2014-11-12 2016-05-19 沈阳华德海泰电器有限公司 Three-position vacuum switch for realizing external grounding of load side by using connected busbar

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150304

Termination date: 20161112