WO2021071036A1 - Dispositif de commutation pour disjoncteur à vide ayant une structure à double liaison et disjoncteur à vide le comprenant - Google Patents

Dispositif de commutation pour disjoncteur à vide ayant une structure à double liaison et disjoncteur à vide le comprenant Download PDF

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Publication number
WO2021071036A1
WO2021071036A1 PCT/KR2020/004483 KR2020004483W WO2021071036A1 WO 2021071036 A1 WO2021071036 A1 WO 2021071036A1 KR 2020004483 W KR2020004483 W KR 2020004483W WO 2021071036 A1 WO2021071036 A1 WO 2021071036A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit breaker
cam
pair
link member
vacuum circuit
Prior art date
Application number
PCT/KR2020/004483
Other languages
English (en)
Korean (ko)
Inventor
조준연
Original Assignee
엘에스일렉트릭(주)
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 엘에스일렉트릭(주) filed Critical 엘에스일렉트릭(주)
Publication of WO2021071036A1 publication Critical patent/WO2021071036A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings

Definitions

  • the present invention relates to a vacuum circuit breaker, and more particularly, a dual link structure capable of overcoming the limit of the input energy capacity and the mechanical durability limit due to opening and closing by arranging a plurality of link members of the crank part along the axis. It relates to a vacuum circuit breaker opening and closing device and a vacuum circuit breaker having the same.
  • a vacuum circuit breaker cuts off the circuit in a vacuum interrupter (VI) inside the circuit breaker by a separate external relay when an abnormal current such as overcurrent, short circuit, or ground fault occurs in the special high voltage/high voltage distribution line. It is a product that protects the load.
  • VI vacuum interrupter
  • the vacuum circuit breaker as described above is installed in a switchboard in which various electric devices are put and managed for the operation or control of power plants and substations, and the operation of electric motors.
  • the vacuum circuit breaker is installed by receiving a circuit breaker body inside a cradle fixed to the switchboard.
  • FIG. 1 is a view showing an example of an opening and closing device provided in a conventional circuit breaker.
  • a conventional opening/closing device used in a circuit breaker includes an on-lever assembly 20, a closing latch 30 constrained by the on-lever assembly 20, and a cam constrained by the closing latch 30.
  • An assembly 40 and a crank assembly 50 fixed to the cam assembly 40 are included.
  • the ON button 106 Upon input, the ON button 106 generates a force along a straight line.
  • the on-coupling rotor 60 moves by receiving the force of the on button 106 and transmits the rotational force to the on-lever assembly 20.
  • the on-lever assembly 20 is rotated to release the locked state of the input latch 30.
  • the cam assembly 40 is provided with a rotating function to charge the input spring through the crank assembly 50 by receiving a rotational force by a handle (not shown).
  • the crank assembly 50 is installed between a pair of cam plates 41 constituting the cam assembly 40, and is configured to be rotatable with a crank shaft 51.
  • a plurality of link members are hingedly connected to form one link structure 52.
  • the switching device having such one link structure can overcome the limit of durability due to opening and closing when applied to an air circuit breaker as shown in FIG. 1, but in a vacuum circuit breaker having a condition of high breaking current (40 kA or more), the input energy There is a problem that is difficult to apply due to limitations in capacity and mechanical durability.
  • An object of the present invention is to provide a vacuum circuit breaker opening and closing device capable of overcoming the limit of the input energy capacity and the mechanical durability limit due to opening and closing by arranging the link members of the crank portion to form a plurality of the link members along the axis and to provide a vacuum circuit breaker having the same. It is to do.
  • another object of the present invention is an opening and closing device for a vacuum circuit breaker capable of preventing a stable opening and closing operation and sudden device malfunction by arranging a plurality of link members in parallel along the axis as described above when interlocking with the closing and closing. And it is to provide a vacuum circuit breaker having the same.
  • the present invention provides an opening and closing device for a vacuum circuit breaker.
  • the opening and closing device for the vacuum circuit breaker includes a pair of side plates disposed in parallel with each other, a lever portion rotatably disposed between the pair of side plates, a latch portion constrained to the lever portion, and the latch portion
  • the opening and closing device for a vacuum circuit breaker comprising a cam portion constrained to the cam portion and a crank portion constrained to the cam portion to achieve a closed state by releasing the axial closing spring
  • the crank portion includes link members disposed in parallel along the cam axis of the cam portion.
  • the link members are arranged at uniform intervals from each other.
  • Each of the link members includes a first link member having one end hinged to the camshaft of the cam unit, a second link member having one end hingedly connected to the other end of the first link member, and one end of the second link. It is preferable to provide a third link member hinged to the other end of the member.
  • each of the second link member and the third link member is provided in a pair
  • the second link member forming a pair is disposed at both sides of the other end of the first link member
  • the third link member forming a pair is disposed on both sides of the other end of the second link member forming a pair.
  • an elastic connection member is interposed between the second link members forming a pair.
  • a gap maintaining member for regulating a gap between the first link members of each of the link members may be installed on the camshaft.
  • the present invention includes a vacuum circuit breaker including the opening and closing device for the vacuum circuit breaker.
  • the opening and closing device for a vacuum circuit breaker according to the present invention and a vacuum circuit breaker having the same have the effect of overcoming the limit of the input energy capacity and the mechanical durability limit due to the opening and closing by arranging the link members of the crank portion along the axis to form a plurality. Have.
  • the opening and closing device for a vacuum circuit breaker according to the present invention and a vacuum circuit breaker having the same are arranged to form a plurality of link members in parallel along the axis as described above, the opening and closing device and the vacuum circuit breaker having the same according to the present invention prevent stable opening and closing operation and sudden device malfunction It has an effect that can be done.
  • FIG. 1 is a view showing an opening and closing device in a conventional circuit breaker.
  • Figure 2 is a perspective view showing the opening and closing device for a vacuum circuit breaker of the present invention.
  • Figure 3a is another perspective view showing the opening and closing device for a vacuum circuit breaker of the present invention.
  • Figure 3b is another perspective view showing the opening and closing device for a vacuum circuit breaker of the present invention.
  • FIG. 4 is a perspective view showing a crank portion according to the present invention.
  • FIG. 5 to 7 are views showing the operation of the opening and closing device for a vacuum circuit breaker according to the present invention while a contact is made.
  • FIGS. 8A and 8B are views showing an example in which a gap maintaining member is further installed on a camshaft according to the present invention.
  • top (or bottom) of the component or the “top (or bottom)” of the component means that an arbitrary component is arranged in contact with the top (or bottom) of the component.
  • other components may be interposed between the component and any component disposed on (or under) the component.
  • each component when a component is described as being “connected”, “coupled” or “connected” to another component, the components may be directly connected or connected to each other, but other components are “interposed” between each component. It is to be understood that “or, each component may be “connected”, “coupled” or “connected” through other components.
  • Figure 2 is a perspective view showing the opening and closing device for a vacuum circuit breaker of the present invention.
  • Figure 3a is another perspective view showing the opening and closing device for a vacuum circuit breaker of the present invention.
  • Figure 3b is another perspective view showing the opening and closing device for a vacuum circuit breaker of the present invention.
  • the opening and closing device for a vacuum circuit breaker of the present invention is a configuration included in the configuration of the vacuum circuit breaker according to the present invention.
  • the opening and closing device for a vacuum circuit breaker largely includes a pair of side plates 100, a lever part 200, a latch part 400, a cam part 300, and a crank part 500. .
  • the pair of side plates 100 are disposed to maintain a constant distance from each other.
  • the pair of side plates 100 serves to support a plurality of configurations of the opening and closing device according to the present invention, which will be described later.
  • a slit (not shown) and a protrusion 110 are formed in the side plate 100 on one side.
  • a coupling slider 120 is horizontally slidably coupled to the slit.
  • the slit is formed into a horizontal straight groove.
  • the protrusion 110 is provided on one side of the slit and is composed of a pin. The protrusion 110 is inserted into the slide hole 121 of the coupling slider 120.
  • a spring fixing protrusion is provided at an upper front end of the side plate 100 on one side, and one end of a spring (not shown) capable of returning a coupling rotor is fixed to the spring fixing protrusion.
  • An on button 130 and an off button 140 are disposed in front of the pair of side plates 100.
  • the on button 130 and the off button 140 are provided to cause a manual input operation and a cut-off operation.
  • the on button 130 rotates around an axis when a user presses it, and the other end of the on button 130 is configured to press a coupling rotor (not shown).
  • the lever unit 200 according to the present invention is rotatably installed across a pair of side plates 100.
  • the lever part 200 is disposed under the above-described coupling rotor.
  • the lever part 200 is composed of a lever shaft 210 installed across a pair of side plates 100 and a lever 220 installed at both ends of the lever shaft 210, respectively.
  • the cam unit 300 is rotatably installed between a pair of side plates 100.
  • the cam part 300 is disposed under the lever part 200.
  • the cam shaft 310 of the cam part 300 receives rotational force by a handle and charges an input spring (not shown) through the crank part 400.
  • the cam shaft 310 is provided with a cam indicator 320 capable of restraining or operating the input indicator 150 and a cam plate 330 capable of restraining or operating the crank part 400, respectively, as a pair of symmetrical do.
  • the cam plate 330 may be installed inside, and the cam indicator 320 may be installed outside.
  • the cam plate 330 and the cam indicator 320 are fixedly installed on the cam shaft 310 and rotated at the same rotational speed.
  • the cam indicator 320 may be formed as a disc.
  • a constraining groove 321 is formed in a portion of the circumferential surface of the cam indicator 320 to constrain the movement of the input indicator 150.
  • the input indicator 150 receives a force to rotate clockwise by the weight of the front display unit.
  • the cam contact portion of the input indicator 150 is caught in the restriction groove 321, the movement of the input indicator 150 is restricted, but the cam contact portion (not shown) moves along the surface of the restriction groove 321 on the circumferential surface. In this case, the input indicator 150 rotates in a counterclockwise direction.
  • a stopper (not shown) capable of restraining motion by the latch part 400 is formed in a portion between the cam indicator 320 and the cam plate 330.
  • the latch part 400 is installed between the lever part 200 and the cam part 300.
  • the latch part 400 has a latch shaft 410 and a latch 420 rotated about the latch shaft 420.
  • the upper end of the latch part 400 is constrained to the lever shaft 210 of the lever part 200.
  • the lower end of the latch part 400 restrains the stopper of the cam indicator 320.
  • the upper end of the latch part 400 is caught by the lever shaft 210 and is placed in a restrained state, and when the lever shaft 210 rotates in a counterclockwise direction and the cut surface faces downward, it is released from restraint and can be rotated.
  • the lower end of the latch part 400 restrains the cam indicator 320 or the stopper of the cam plate 330 to restrain the rotation of the cam part 300.
  • the cam part 300 is released from the restraint of the latch part 400 and is rotatable.
  • FIG. 4 is a perspective view showing a crank portion according to the present invention.
  • the crank portion 500 is installed between a pair of cam plates 330.
  • the crank part 500 moves along the outer circumference of the pair of crank plates 510 and the crank shaft 520 and the cam plate 330 to be rotational centers, and restrains or releases the movement of the crank part 500 It includes a shaft 530.
  • the rolling shaft 530 may be composed of a roller.
  • the crank part 500 includes link members 540 disposed in parallel along the cam shaft 310 of the cam part 300.
  • Each of the link members 540 is formed in the same configuration.
  • the link members 540 according to the present invention are disposed at a uniform distance from each other.
  • the link members 540 in the present invention may be provided in two. Of course, two or more link members 540 may be installed at uniform intervals along the cam shaft 310.
  • Each of the link members 540 has a first link member 541 having one end hingedly connected to the cam shaft 310 of the cam unit 300, and the other end of the first link member 541 is hinged. (h1) A second link member 542 to be connected, and a third link member 543 having one end hinged to the other end of the second link member 542 (h2).
  • the first link member 541 is formed in an L shape in which the center is bent as a whole.
  • a through hole 541a through which the camshaft 310 passes is formed in the center of the first link member 541.
  • One end of the first link member 541 is disposed to face the front of the pair of side plates 100, and the other end extends upward.
  • the second link member 542 is configured as a pair.
  • One end of the pair of second link members 542 is hinged (h1) to the other end of the first link member 541.
  • one end of each of the pair of second link members 542 is disposed to surround both sides of the other end of the first link member 541. Accordingly, the pair of second link members 542 maintain a predetermined gap with each other.
  • the gap may be a gap forming the thickness of the first link member 541.
  • one end of the third link member 543 is hinged (h2) to the other end of the second link member 542.
  • the third link member 543 is configured as a pair. One end of the third link member 643 configured as a pair is disposed to surround both side portions of the other end of the pair of second link members 542. The pair of third link members 543 form a predetermined gap. The gap may be a gap between the pair of second link members 542.
  • an elastic connection member 550 is interposed between the second link members 542 forming a pair.
  • another elastic connection member 560 may be interposed between the third link members 543 forming a pair.
  • each of the pair of second link members 542 and the pair of third link members 543 form a uniform gap with each other, thereby improving durability.
  • crank part 500 forms a structure in which the link members 540 are arranged in parallel along the camshaft 310, but at uniform intervals.
  • FIG. 5 to 7 are views showing the operation of the opening and closing device for a vacuum circuit breaker according to the present invention while a contact is made.
  • FIGS. 2 to 4 the configuration of the opening and closing device according to the present invention will be referred to FIGS. 5 to 7.
  • the opening and closing device can achieve a blocked state.
  • the cam unit 300 rotates in a counterclockwise direction, and an input spring (not shown) is in a charged state.
  • the rolling shaft 530 of the crank part 300 is constrained to the cam plate 330. Accordingly, the crank part 500 cannot rotate. Accordingly, the closing spring maintains a deflated state.
  • the coupling slider 120 is placed in a state that is moved to the rightmost side by a spring.
  • the on button 150 rotates counterclockwise around the shaft.
  • the pressing portion 107 presses the on-button contact portion 152 of the on-coupling rotor 150 so that the on-coupling rotor 150 rotates in a clockwise direction.
  • the on-lever contact portion 153 presses the protrusion 113 of the on-lever assembly 110, and the lever portion may be rotated counterclockwise around the lever shaft 111. .
  • the upper end of the latch part 400 is released from the restraint.
  • the latch part 400 moves away from the stopper by receiving the rotational force of the cam part 300 and rotates counterclockwise around the latch shaft 410. Is rotated.
  • the cam unit 300 rotates in a clockwise direction as it escapes from the constraint of the latch unit 400. Accordingly, the crank portion 500, which was constrained by the cam plate 330, is released from the confinement while the rolling shaft 530 moves to the insertion portion of the cam plate 330, and is rotated counterclockwise by the restoring force of the input spring. .
  • the movable contactor (2) is rotated clockwise around the main shaft (18) through the two link members 540 according to the present invention while the input spring is inclined to fix the movable contactor (2) to the fixed contactor (1) or terminal.
  • the movable part lever 18a and the fixed contact 1 are connected through a separate link structure 3.
  • the link member 540 is arranged in parallel along the camshaft 310 when inserted as described above. Accordingly, half of the load may be transmitted to each link member 540.
  • the present invention may be applicable to a vacuum circuit breaker having a larger rating through an increase in the input spring energy.
  • the opening/closing apparatus can overcome the limitation of the input energy capacity and the mechanical durability limitation due to the opening and closing by arranging the link members 540 of the crank portion 500 to form a plurality of the link members 540 along the axis line.
  • the opening/closing device may prevent a stable opening/closing operation and sudden device malfunction by arranging a plurality of link members 540 in parallel along the axis as described above when the closing and closing are interlocked.
  • FIGS. 8A and 8B are views showing an example in which a gap maintaining member is further installed on a camshaft according to the present invention.
  • one spacing member 600 is installed on the camshaft 310.
  • the spacing member 600 is disposed between the two link members 540 and on the outer side of each link member 540.
  • the spacing members 600 are disposed at intervals on the cam shaft 310.
  • the spacing members 600 are preferably arranged by being fitted into grooves formed on the outer periphery of the camshaft 310 at a set position.
  • Each of the spacing members 600 may be formed in a ring shape.
  • the spacing member 600 may be fitted and fixed to the cam shaft 310.
  • the fixing method may be a means such as a fixing bolt.
  • a first link member 541 of one link member 540 is disposed on one side of the spacing member 600.
  • a first link member 541 of another link member 540 is disposed on the other side of the spacing member 600.
  • the spacing members 600 may guide the two first link members 541 to maintain a constant spacing.
  • guide protrusions 610 may be further formed on both side surfaces of the gap maintaining member 600.
  • a guide groove 541a for guiding rotation may be further formed by inserting the guide protrusion 610 on an inner surface of one end of each of the first link members 541.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

La présente invention concerne un dispositif de commutation pour un disjoncteur à vide. Le dispositif de commutation pour un disjoncteur à vide comprend : une paire de plaques latérales disposées en parallèle l'une par rapport à l'autre ; une unité de levier disposée de manière rotative entre la paire de plaques latérales ; une unité de verrouillage reliée à l'unité de levier ; une unité de came reliée à l'unité de verrouillage ; et une unité de manivelle, reliée à l'unité de came, pour libérer un ressort de fermeture chargé pour créer un état fermé, l'unité de manivelle comprenant des éléments de liaison agencés en parallèle le long d'un arbre de came de l'unité de came.
PCT/KR2020/004483 2019-10-10 2020-04-01 Dispositif de commutation pour disjoncteur à vide ayant une structure à double liaison et disjoncteur à vide le comprenant WO2021071036A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190125167A KR20210042519A (ko) 2019-10-10 2019-10-10 듀얼 링크 구조를 갖는 진공 차단기용 개폐장치 및 이를 갖는 진공 차단기
KR10-2019-0125167 2019-10-10

Publications (1)

Publication Number Publication Date
WO2021071036A1 true WO2021071036A1 (fr) 2021-04-15

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PCT/KR2020/004483 WO2021071036A1 (fr) 2019-10-10 2020-04-01 Dispositif de commutation pour disjoncteur à vide ayant une structure à double liaison et disjoncteur à vide le comprenant

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KR (1) KR20210042519A (fr)
WO (1) WO2021071036A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080002431U (ko) * 2006-12-29 2008-07-03 엘에스산전 주식회사 기중차단기 및 그에 사용되는 링크
JP2009123704A (ja) * 2007-11-15 2009-06-04 General Electric Co <Ge> 回路遮断器用二次トリップシステム
KR20110019634A (ko) * 2009-08-20 2011-02-28 주식회사 비츠로테크 진공차단기 조작기부
KR20120043764A (ko) * 2009-11-03 2012-05-04 미쓰비시덴키 가부시키가이샤 개폐장치의 조작기구
KR20190107947A (ko) * 2018-03-13 2019-09-23 엘에스산전 주식회사 가스절연 개폐장치용 전동 스프링 조작장치의 메인레버 구조

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080002431U (ko) * 2006-12-29 2008-07-03 엘에스산전 주식회사 기중차단기 및 그에 사용되는 링크
JP2009123704A (ja) * 2007-11-15 2009-06-04 General Electric Co <Ge> 回路遮断器用二次トリップシステム
KR20110019634A (ko) * 2009-08-20 2011-02-28 주식회사 비츠로테크 진공차단기 조작기부
KR20120043764A (ko) * 2009-11-03 2012-05-04 미쓰비시덴키 가부시키가이샤 개폐장치의 조작기구
KR20190107947A (ko) * 2018-03-13 2019-09-23 엘에스산전 주식회사 가스절연 개폐장치용 전동 스프링 조작장치의 메인레버 구조

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