EP2430322B1 - Dispositif de verrouillage pour limiter le mouvement rotatif - Google Patents

Dispositif de verrouillage pour limiter le mouvement rotatif Download PDF

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Publication number
EP2430322B1
EP2430322B1 EP09844511.7A EP09844511A EP2430322B1 EP 2430322 B1 EP2430322 B1 EP 2430322B1 EP 09844511 A EP09844511 A EP 09844511A EP 2430322 B1 EP2430322 B1 EP 2430322B1
Authority
EP
European Patent Office
Prior art keywords
bush
lock device
handle
axial direction
counterpart
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.)
Not-in-force
Application number
EP09844511.7A
Other languages
German (de)
English (en)
Other versions
EP2430322A1 (fr
EP2430322A4 (fr
Inventor
Fei Cen
Xiaobo Huang
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.)
ABB Technology AG
Original Assignee
ABB Technology AG
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 ABB Technology AG filed Critical ABB Technology AG
Publication of EP2430322A1 publication Critical patent/EP2430322A1/fr
Publication of EP2430322A4 publication Critical patent/EP2430322A4/fr
Application granted granted Critical
Publication of EP2430322B1 publication Critical patent/EP2430322B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/02—Details
    • H01H33/46—Interlocking mechanisms
    • H01H33/50—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H01H9/281—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock

Definitions

  • This invention relates to the field of power products and mechanics, and more particularly to a lock mechanism for restricting rotational movement.
  • Busbar voltage transformer (abbreviate VT or PT) are used to measure the voltage on Busbar. Sometimes, the PT needs maintenance while the Busbar is still in service. Then the PT needs to be isolated from the main circuit, which is implemented by a PT disconnector.
  • the PT disconnector is located in a gas tank of gas insulated switchgear (GIS).
  • GIS gas insulated switchgear
  • the PT disconnector is connected with insulated material in the gas tank and with the handle outside the gas tank.
  • a rotatable shaft is used to drive the disconnector switching from connected state to disconnected state.
  • the shaft is accessible to and can be operated by anyone outside the gas tank, which is a risk for the GIS and the operators. Thus, safety assurance is needed to prevent unauthorized rotation of the shaft.
  • Padlock was adopted to prevent unauthorized operation of the PT disconnector by restricting the rotational movement of the shaft.
  • FIG. 1A shows the structure of the lock device. It mainly comprises four parts: a plate 92, a fixing plate 93, a padlock 94 and a handle 95.
  • the handle 95 and the plate 92 are fixed on a rotatable shaft 91 which is used to operate the disconnector.
  • the fixing plate 93 is fixed to the side-plate of the switchgear. There is a hole 921 on the plate 92 and a second hole 931 on the fixing plate 93.
  • the handle 95 can be operated and it drives the shaft 91 to rotate.
  • the PT disconnector can be operated.
  • FR 2 299 710 A1 discloses a device with a locking mechanism having a bush adapted to rotate about an axial direction and to move along said axial direction. A rotation of the bush and a movement of the bush in the axial direction can be restricted.
  • JP 2000 243193 A discloses a lock mechanism of an operating device for a switch.
  • a shutter having a lock-pin insertion hole formed therein and agreeing with the axis of a manually operated shaft is disposed on the front side of the manually operated shaft so that it can make a turning motion centering around a shaft, and a lock pin is provided having a metallic stopper part fastened to its base end part and limiting the rotation of the manually operated shaft by abutting on the shutter when the lock pin is mounted in the manually operated shaft.
  • the main purpose of the present invention is to increase safety and reliability when restricting rotational movement. This object is achieved by a lock device and a gas insulated switchgear with a disconnector described as following.
  • a lock device for restricting unauthorized rotating movement.
  • the lock device comprises a bush or cylinder which is adapted and arranged to rotate about an axial direction and to move along said axial direction between two axial positions.
  • the bush comprises a first protrusion adapted to interact with a first counterpart which is fixed in rotational direction in order to restrict, in a locked position of the first protrusion, the rotation of said bush.
  • the lock device further comprises a second counterpart adapted to prevent the axial movement of said bush out of said locked position of the first protrusion.
  • said second counterpart is a handle which is coupled to the bush in said axial direction.
  • the handle comprises a first surface.
  • the first surface is adapted to abut against, in a locked position of said handle, a third counterpart fixed in axial direction.
  • the third counterpart inhibits an axial displacement of the handle, and prevents the bush from moving in axial direction out of the locked position of the first protrusion.
  • the handle further comprises a second surface, wherein the second surface is adapted to touch, in an unlocked position of said handle, said third counterpart. In this position, the handle and bush will have been moved in said axial direction, releasing the protrusion out of the locked position of the first protrusion into a release position, and permitting the bush to rotate about said axial direction.
  • the bush encloses a hole in the transverse direction fitted to accommodate the handle.
  • the handle has a circular cross-section, and said first surface and second surface correspond to the two parts of the handle of different diameters.
  • the first surface is the surface of the long diameter part and second surface is the surface of the short diameter part.
  • the handle further comprises an opening fitted to accommodate a fourth counterpart.
  • the fourth counterpart is plugged in the opening to prevent the handle from moving between the first position and the second position.
  • the fourth counterpart is a padlock or a:bolt.
  • the bush encloses a cavity with a non-circular cross-section fitted to accommodate a shaft.
  • the cavity is adapted to transfer rotational, but not axial movement between the bush and the shaft.
  • the cross-section of said cavity is quadrate or rhombic.
  • a shaft is fitted to the cavity to be able to rotate about said axial direction in response to the rotation of the bush.
  • the third counterpart is a second protrusion that is part of the shaft or a separated component which is fixed on the shaft.
  • the second protrusion is a bolt which is fixed on the shaft.
  • the lock device further comprises a plate or other support means fixed in the axial direction, with a circular hole adapted to accommodate the bush.
  • the first counterpart is arranged or provided on the plate.
  • the first protrusion is a bulge on the exterior of the bush and the first counterpart is a notch adapted to the protrusion.
  • the notch can be quadrate or rhombic.
  • the lock device further comprises a spring, arranged in axial direction to support or reinforce the locked position of the bush.
  • the force of the spring has to be counteracted by an operator unlocking the bush/protrusion, and makes a flange of the bush cling to plate tightly in said locked position of first protrusion.
  • a gas insulated switchgear with a disconnector comprises a lock device as described above which is arranged to prevent unauthorized operation of said disconnector.
  • the gas insulated switchgear further comprises a state-plate rotationally coupled to the bush to indicate different states of said disconnector.
  • the lock device for restricting rotational movement comprises a bush 3 adapted to rotate about an axial direction 100 and to move along the axial direction 100.
  • the bush 3 comprises a bulge 32 adapted to interact with notches 12 in order to restrict, in a locked position of the bulge 32, the rotation of the bush 3.
  • the lock device further comprises a handle 4 adapted to prevent the bush 3 from moving in axial direction 100 out of the locked position of the bulge 32.
  • the handle 4 has a circular cross-section, and two parts with different diameters.
  • the first surface 43 which is the surface of the long diameter part, is adapted to abut against, in a locked position 400 of the handle 4, a protrusion 21 fixed in axial direction 100, in order to prevent the bush 3 from moving in axial direction 100 out of the locked position of the bulge 32.
  • the second surface 42 which is the surface of the short diameter part, is adapted to touch a protrusion 21 in an unlocked position 401 of the handle 4. In this unlocked position 401, the handle 4 and bush 3 will have been moved in the axial direction 100, releasing the bulge 32 out of the locked position into a release position, and permitting the bush 3 to rotate about the axial direction 100.
  • the bush 3 comprises an opening 33 in a transverse direction 101 fitted to accommodate the handle 4 and to couple the handle 4 to the bush 3 in the axial direction 100.
  • the handle 4 further comprises a second opening 41 fitted to accommodate a padlock or a bolt 5.
  • the padlock 5 is plugged in the second opening 41, the handle 4 is fastened in the locked position 400 and the protrusion 21 abuts against the first surface 43 of the handle 4, which prevents the bush 3 and the handle 4 to move in the axial direction 100.
  • the bush is locked by the bugle 32 in the notches 12 and is prevented from rotating.
  • the handle 4 can move in the transverse direction 101.
  • the bush 3 can be moved in the axial direction 100 until the protrusion 21 touch the second surface 42 in unlocked position 401 of the handle. In this position, the bulge 32 will have moved out of the notches 12. Thus the bush 3 will be released from the locked position of the bulge 32 into a release position, and can rotate about the axial direction 100.
  • the protrusion 21 is part of a shaft 2 fixed in the axial direction 100, or a bolt fixed on the shaft 2.
  • the length of the protrusion 21 is fitted to abut against the first surface 43 of the handle 4 to lock the bulge 32 of the bush 3 in the notches 12, and to release the bulge 32 of the bush 3 from the notches 12 when it touches the second surface 42.
  • Fig. 2B shows another example of structure which is not part of the present invention.
  • the bush 3 comprises an opening 33' adapted to couple with an opening 23' on a shaft 2 which is fixed in the axial direction 100 to prevent the bush 3 from moving in the axial direction 100 out of the locked position of the bulge 32.
  • the lock device further comprises a padlock or a bolt 4'.
  • a padlock or a bolt 4' As shown in Fig 3E , when the padlock 4' is plugged in the opening 33' of the bush 3 and coupled to the opening 23' on the fixed shaft 2, the bush 3 is fastened in a locked position and can not move in the axial direction 100. Thus the bush 3 is locked by the bugle 32 in the notches 12 and is prevented from rotating.
  • Fig. 3F is a schematic view of unlocked state according to the other example of structure which is not part of the present invention When the padlock 4' is removed, the opening 33' will be released from coupling with the opening 23' of the fixed shaft 2.
  • the bush 3 can be moved towards the notches 12 in the axial direction 100 and the bulge 32 will be moved out of the notches 12.
  • the bush 3 will be released from the locked position of the bulge 32 into a release position, and can rotate about the axial direction 100.
  • the lock device in order to rotate the bush 3 in unlocked state efficiently, the lock device further comprises a handle 40' fixed on the bush 3.
  • the cross section of the bulge 32 and the notches 12 are quadrate or rhombic and adapted to interact with each other.
  • the bush 3 encloses a cavity 31 fitted to accommodate a shaft 2, as shown in Fig. 3A , 3C , 3E and 3F , wherein the cross section of the cavity 31 is not circular.
  • the lock device further comprises a shaft 2 adapted to transfer rotational, but not axial movement between the bush 3 and the shaft 2.
  • the cross section of the shaft 2 and the cavity 31 of the shaft 2 are quadrate or rhombic.
  • the lock device further comprises a plate 1 with a circular hole 11 adapted to accommodate the bush 3; as shown in Fig. 3A to 3F , wherein two notches 12 are arranged on the plate 1.
  • the two notches 12, by interacting with the bulge 32, lock and prevent the bush 3 from rotating in correspondence with the two states of the switch: connecting state and disconnecting earthing state.
  • the lock device further comprises a spring 61, arranged in the axial direction 100 to exert a pre-tight force for making the bush 3 cling to the plate 1.
  • the force of the spring 61 has to be counteracted by an operator when unlocking the bush/protrusion. And when the bulge 32 of the bush 3 can be moved into the notches 12, the force of the spring 61 drives the bush 3 to move backwards from the notches 12 in the axial direction 100 into the locked position of the bulge 32 and makes a flange of the bush 3 cling to the plate 1 tightly.
  • the lock device is used in a gas insulated switchgear that comprises a disconnector.
  • the gas insulated switchgear comprises a lock device as described above which is arranged to prevent unauthorized operation of the disconnector.
  • Fig. 4 is a schematic view of the lock device fixed to the plate of the gas insulated switchgear.
  • FIG. 5 is a local enlargement view of airtight connection between shaft 2 and gas tank of the switchgear.
  • the shaft 2 further comprises a section of piston 63 at the GIS side, which fits with the inner hole of bearing or cylinder 64.
  • the bearing is fixed to the gas tank.
  • the gas insulated switchgear further comprises a state-plate 62 rotationally coupled to the bush 3 to indicate different states of the disconnector.
  • the state-plate 62 comprises a notch 622 same with the notch 12 on the plate 1.
  • the state-plate 62 further comprises two state-markers 627 adapted to an opening 17 and the two notches 12 on the plate 1.
  • Fig. 7 is a schematic view of the lock device corresponding to the two states of the switch, in which Fig. 7A shows the switch in connecting state; Fig. 7B shows the switch in earthing state.
  • the state-marker 627 shows "I" in connecting state, while shows "O" in disconnecting earthing state.
  • the lock device according to the present invention prevents the rotation of the shaft inside the switchgear by components outside the switchgear without opening inside the switchgear. This makes the lock device of the present invention safer and meets IP 4X requirement.
  • the present invention provides a perfect lock mechanism.
  • Fig. 8A shows a variation of the notches 12'
  • Fig. 8B shows a triangular cross section shaft 2'
  • Fig. 8C shows the interaction of the notch 12'with the bulge 32' and the interaction of the cavity 31' of the bush 3 with the triangular cross section shaft 2'.
  • the modifications to the notches 12' can also lock the bush 3 in a locked position of the bulge 32', and the triangular cross section cavity 31' of the bush 3 can also transfer rotational movement between the bush 3 and the shaft 2'.

Landscapes

  • Patch Boards (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (12)

  1. Dispositif de verrouillage pour limiter le mouvement de rotation, comprenant une douille (3) adaptée pour tourner autour d'une direction axiale (100) et se déplacer le long de ladite direction axiale (100); la douille (3) comprenant une première saillie (32) adaptée pour interagir avec une première pièce antagoniste (12) afin de limiter, en position verrouillée de la première saillie (32), la rotation de ladite douille (3);
    ledit dispositif de verrouillage comprenant par ailleurs une deuxième pièce antagoniste (4, 4') adaptée pour empêcher que la douille (3) ne se déplace dans la direction axiale (100) hors de la position verrouillée de la première saillie (32),
    caractérisé par le fait que
    ladite deuxième pièce antagoniste est une poignée (4) adaptée pour être couplée à ladite douille (3) dans ladite direction axiale (100); ladite poignée (4) comprenant une première surface (43) adaptée pour venir en butée, dans une position verrouillée (400) de ladite poignée (4), contre une troisième pièce antagoniste (21) fixée en direction axiale (100), afin d'empêcher que la douille (3) ne se déplace dans la direction axiale (100) hors de la position verrouillée de la première saillie (32).
  2. Dispositif de verrouillage selon la revendication 1, caractérisé par le fait que ladite poignée (4) comprend par ailleurs une deuxième surface (42), dans lequel la deuxième surface (42) est adaptée pour toucher, en une position déverrouillée (401) de ladite poignée (4), ladite troisième pièce antagoniste (21) pour permettre que la douille (3), dans une position de dégagement de la première saillie (32), tourne autour de ladite direction axiale (100).
  3. Dispositif de verrouillage selon la revendication 1, caractérisé par le fait que la douille (3) comprend une première ouverture (33) dans une direction transversale (101) adaptée pour recevoir ladite poignée (4) et pour coupler ladite poignée à la douille.
  4. Dispositif de verrouillage selon la revendication 1, caractérisé par le fait que ladite poignée (4) comprend par ailleurs une deuxième ouverture (41) adaptée pour recevoir une quatrième pièce antagoniste (5); dans lequel ladite quatrième pièce antagoniste (5) est introduite dans ladite deuxième ouverture (41) pour empêcher que la poignée (4) ne se déplace entre ladite position verrouillée (400) et ladite position déverrouillée (401).
  5. Dispositif de verrouillage selon la revendication 2, caractérisé par le fait que ladite poignée (4) présente une section circulaire, et ladite première surface (43) et la deuxième surface (42) correspondent à deux parties de la poignée (4) de diamètres différents.
  6. Dispositif de verrouillage selon la revendication 1, caractérisé par le fait que ladite douille (3) renferme une cavité (31) adaptée pour recevoir un arbre (2), dans lequel une section de la cavité (31) n'est pas circulaire.
  7. Dispositif de verrouillage selon la revendication 6, caractérisé par le fait que ladite troisième pièce antagoniste (21) est une deuxième saillie qui fait partie d'un arbre (2) fixé dans la direction axiale, ou ladite troisième pièce antagoniste (21) est une deuxième saillie qui est un composant séparé fixé audit arbre (2).
  8. Dispositif de verrouillage selon la revendication 1, caractérisé par le fait qu'il comprend par ailleurs une plaque (1) avec un trou circulaire (11) adapté pour recevoir ladite douille (3); dans lequel ladite première pièce antagoniste (12) est disposée sur la plaque (1).
  9. Dispositif de verrouillage selon la revendication 8, caractérisé par le fait que ladite première pièce antagoniste (12) est une encoche, et ladite encoche (12) se situe en un point de la circonférence dudit premier trou circulaire (11).
  10. Dispositif de verrouillage selon la revendication 1, caractérisé par le fait qu'il comprend par ailleurs un ressort (61) disposé dans la direction axiale (100) pour supporter ladite position verrouillée de la première saillie (32).
  11. Dispositif de commutation à isolation gazeuse avec un sectionneur, caractérisé par le fait qu'il comprend un dispositif de verrouillage selon l'une quelconque des revendications précédentes pour empêcher un fonctionnement non autorisé dudit sectionneur.
  12. Dispositif de commutation à isolation gazeuse selon la revendication 11, caractérisé par le fait qu'il comprend par ailleurs une plaque d'état (62) couplée de manière rotative à la douille (3) pour indiquer différents états dudit sectionneur.
EP09844511.7A 2009-05-15 2009-05-15 Dispositif de verrouillage pour limiter le mouvement rotatif Not-in-force EP2430322B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2009/071808 WO2010130099A1 (fr) 2009-05-15 2009-05-15 Dispositif de verrouillage pour limiter le mouvement rotatif

Publications (3)

Publication Number Publication Date
EP2430322A1 EP2430322A1 (fr) 2012-03-21
EP2430322A4 EP2430322A4 (fr) 2014-01-29
EP2430322B1 true EP2430322B1 (fr) 2016-01-27

Family

ID=43084617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09844511.7A Not-in-force EP2430322B1 (fr) 2009-05-15 2009-05-15 Dispositif de verrouillage pour limiter le mouvement rotatif

Country Status (3)

Country Link
EP (1) EP2430322B1 (fr)
CN (1) CN102369361B (fr)
WO (1) WO2010130099A1 (fr)

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CN103545130A (zh) * 2012-07-09 2014-01-29 厦门宏发开关设备有限公司 一种断路器的分闸锁定机构
CN103021718B (zh) * 2012-12-14 2015-08-12 广西银河迪康电气有限公司 具有防过冲装置的三工位开关操动机构
CN103337479B (zh) * 2013-07-05 2016-03-30 合肥京东方光电科技有限公司 一种阵列基板、显示装置及阵列基板的制作方法
CN103419979B (zh) * 2013-08-16 2015-01-14 广州达意隆包装机械股份有限公司 一种分配器内轴结构的防转装置
CN104485249B (zh) * 2014-11-04 2017-02-15 兖州煤业股份有限公司 综掘机、隔离开关及上锁装置
CN105065354B (zh) * 2015-07-15 2017-03-08 淮南矿业(集团)有限责任公司 联锁装置
US9828789B2 (en) 2015-12-22 2017-11-28 Leviton Manufacturing Co., Inc. Locking and sealing arrangement for a load switch handle
CN110459421A (zh) * 2019-08-26 2019-11-15 国网新疆电力有限公司阿勒泰供电公司 带有防误操作闭锁装置的低压空开开关

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JP2000243193A (ja) * 1999-02-16 2000-09-08 Takaoka Electric Mfg Co Ltd 開閉器用操作装置のロック機構
JP3356764B2 (ja) * 2001-02-13 2002-12-16 日本ベルボン精機工業株式会社 伸縮装置
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Also Published As

Publication number Publication date
EP2430322A1 (fr) 2012-03-21
WO2010130099A1 (fr) 2010-11-18
EP2430322A4 (fr) 2014-01-29
CN102369361A (zh) 2012-03-07
CN102369361B (zh) 2013-12-18

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