EP2362406A1 - Semi-pantograph disconnector - Google Patents
Semi-pantograph disconnector Download PDFInfo
- Publication number
- EP2362406A1 EP2362406A1 EP10175102A EP10175102A EP2362406A1 EP 2362406 A1 EP2362406 A1 EP 2362406A1 EP 10175102 A EP10175102 A EP 10175102A EP 10175102 A EP10175102 A EP 10175102A EP 2362406 A1 EP2362406 A1 EP 2362406A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- rod
- shoe
- base
- semi
- 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.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
- H01H31/36—Contact moved by pantograph
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
Abstract
A semi-pantograph disconnector, comprising
- a base (11), which supports a motor kinematic system (12),
- an arm (13), which has a shoe (14) for gripping a dropper (15) and is hinged to the base (11) so as to be able to oscillate in order to pass reversibly from a disconnection configuration, in which the arm (13) is collapsed onto the base (11), to a contact configuration, in which the arm (13) is divaricated from the base (11) so as to connect by means of the shoe (14) to the dropper (15),
- a rod (16), which is functionally connected to the shoe (14) in order to actuate it,
- a cam device (17) for actuating the rod (16), which coordinates kinematically the opening of the shoe (14) and a first rotation of the arm (13) from the disconnection configuration to the contact configuration,
- a semi-pantograph device (18), which is functionally connected to the rod (16), to the arm (13) and to the motor kinematic system (12), defining a kinematic sequence for closing the shoe (14), after the first rotation of the arm (13), and a kinematic sequence for opening the shoe (14), which is preliminary to a second rotation of the arm (13) which moves it from the contact configuration to the disconnection configuration.
- a base (11), which supports a motor kinematic system (12),
- an arm (13), which has a shoe (14) for gripping a dropper (15) and is hinged to the base (11) so as to be able to oscillate in order to pass reversibly from a disconnection configuration, in which the arm (13) is collapsed onto the base (11), to a contact configuration, in which the arm (13) is divaricated from the base (11) so as to connect by means of the shoe (14) to the dropper (15),
- a rod (16), which is functionally connected to the shoe (14) in order to actuate it,
- a cam device (17) for actuating the rod (16), which coordinates kinematically the opening of the shoe (14) and a first rotation of the arm (13) from the disconnection configuration to the contact configuration,
- a semi-pantograph device (18), which is functionally connected to the rod (16), to the arm (13) and to the motor kinematic system (12), defining a kinematic sequence for closing the shoe (14), after the first rotation of the arm (13), and a kinematic sequence for opening the shoe (14), which is preliminary to a second rotation of the arm (13) which moves it from the contact configuration to the disconnection configuration.
Description
- The present invention relates to a semi-pantograph disconnector.
- Several models of pantograph or semi-pantograph disconnector are currently known.
- In particular, so-called vertical-break disconnectors of the pantograph or semi-pantograph type are known.
- In the former, the contact force is linked to the elasticity of the material and therefore to the rigidity of the tubes of the active part, and in order to have high contact forces it is necessary to have a high working torque.
- In semi-pantographs, instead, a spring-operated device ensures a high contact force. An additional spring allows to have low working torques because it balances the closing motion of the disconnector.
- Disconnectors with an oscillating arm are further known which have an arm which, on command, rotates during closure, straddling the dropper with a shoe so as to provide with it the desired electric contact, and then the shoe is closed to ensure the durable efficiency of this contact.
- During opening, the shoe opens, leaving the dropper, and then the arm rotates and moves away from it.
- The correct sequentiality of the movements for closing and opening the shoe with respect to the rotations of the arm are achieved with a semi-pantograph kinematic system.
- It is known that in the field of this type of disconnector the need is always felt to simplify their structure so as to make them more durable and reliable over time.
- Moreover, known disconnectors of this type have the drawback of having, when they are open, their shoe exposed to the effects of weather, so that it can become covered with ice, to the full detriment of an effective electrical contact during closure.
- The aim of the present invention is to provide a semi-pantograph disconnector that meets this requirement, having a structure and an operation which are simpler than known currently known semi-pantograph disconnectors.
- Within this aim, an object of the invention is to propose a disconnector that is reliable and has a durable precision of the grip of the dropper to close the electrical contact.
- Another object of the invention is to provide a semi-pantograph disconnector that allows reliable grip of the dropper, allowing to adjust the grip force.
- This aim, as well as these and other objects that will become better apparent hereinafter, are achieved by a semi-pantograph disconnector, comprising
- a base which supports a motor kinematic system,
- an arm which has, at a first end, a grip shoe for a dropper and is hinged to said base at the second end so as to be able to oscillate about a rotation axis in order to pass reversibly from a disconnection configuration, in which said arm is collapsed onto said base, to a contact configuration, in which said arm is divaricated from said base so as to connect by means of said shoe to a dropper,
- a rod, which is functionally connected to said shoe in order to actuate it,
- a cam device for actuating said rod, which coordinates kinematically the opening of said shoe, by means of said rod, and a first rotation of said arm, which corresponds to the transition from said disconnection configuration to said contact configuration,
- a semi-pantograph device which is functionally connected to said rod, to said arm and to said motor kinematic system, defining a kinematic sequence for closing said shoe, by way of the action of said rod, after said first rotation of said arm, and a kinematic opening sequence of said shoe, by means of said rod, which is preliminary to a second rotation of said arm which corresponds to the transition from said contact configuration to said disconnection configuration.
- Further characteristics and advantages of the invention will become better apparent from the following detailed description of a preferred but not exclusive embodiment of the semi-pantograph disconnector according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:
-
Figure 1 is a perspective view of a semi-pantograph disconnector according to the invention in a contact configuration; -
Figure 2 is a side elevation view of a second embodiment of a semi-pantograph disconnector according to the invention in a disconnection configuration; -
Figure 3 is a side elevation view of the semi-pantograph disconnector according to the invention ofFigure 1 , in a contact configuration; -
Figure 4 is an enlarged-scale and partially sectional view of a detail of a semi-pantograph disconnector according to the invention in the second embodiment; -
Figure 5 is an enlarged-scale perspective view of a detail of a semi-pantograph disconnector according to the invention in a further embodiment; -
Figure 6 is another enlarged-scale and partially sectional view of a detail of a semi-pantograph disconnector according to the invention; -
Figure 7 is an enlarged-scale and partially sectional view of a further detail of a semi-pantograph disconnector according to the invention. - It is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.
- With reference to the figures, the reference numeral 10 generally designates a semi-pantograph disconnector, which comprises
- a
base 11, which supports a motorkinematic system 12, - an
arm 13, which has, at afirst end 13a, ashoe 14 for gripping adropper 15 and is hinged, at thesecond end 13b, to thebase 11 so that it can oscillates about a rotation axis A. - In this manner, the
arm 13, by rotating by actuation of the motorkinematic system 12 about the rotation axis A, can pass reversibly from a disconnection configuration, in which thearm 13 is collapsed onto thebase 11, to a contact configuration, in which thearm 13 is divaricated from thebase 11 in electrical contact by means of theshoe 14 with adropper 15. - According to the invention, a particularity of the disconnector 10 consists in that it comprises
- a
rod 16, which is functionally connected to theshoe 14 in order to actuate it, - a
cam device 17 for actuating therod 16, which coordinates kinematically the opening of theshoe 14, by means of therod 16, and a first rotation of thearm 13, which corresponds to the transition from the disconnection configuration to the contact configuration, - a
semi-pantograph device 18, which is functionally connected to therod 16, to thearm 13 and to the motorkinematic system 12, which defines a kinematic sequence for closing theshoe 14, by way of the action of therod 16, subsequent to the first rotation of thearm 13, and a kinematic sequence for opening theshoe 14, by means of therod 16, which is preliminary to a second rotation of thearm 13 that corresponds to the transition from such contact configuration to such disconnection configuration. - Moreover, the
shoe 14 conveniently has a fixedjaw 19, which is jointly connected to thefirst end 13a of thearm 13, and amovable jaw 20, which is pivoted thereto and is connected to afirst end 16a of therod 16 in order to be rotated by it, so as to close and open theshoe 14. - Conveniently, the disconnector 10 comprises an
element 21 for connecting themovable jaw 20 to thefirst end 16a of therod 16, which substantially is elastically flexible. - In particular, the
connecting element 21 comprises aspring 22, which is compressed between anabutment 23 of therod 16 and aconnector 24 to themovable jaw 20, in order to transmit between them a predefined force for closing theshoe 14. - The
connector 24 is connected to therod 16 so that it can slide axially with respect to it. - More particularly, the
connector 24 advantageously comprises ajoint 25 which is pivoted to themovable jaw 20 in order to rotate it, and is connected by means of a threadedstem 26 to anabutment washer 27 for thespring 22. - Conveniently,
abutment nuts 28 for thewasher 27 are screwed onto the threadedstem 26 and are adapted to adjust the preloading of thespring 22 in order to define the grip force of theshoe 14 on thedropper 15. - The
cam device 17 is preferably provided by apin 29 which is jointly connected to therod 16 and can slide along aguide 30 formed on thebase 11. - The
guide 30 conveniently forms for the pin 29 a trajectory B for spacing, for the opening of theshoe 14, and for subsequent radial approach with respect to the rotation axis A, thepin 29 following the trajectory B during such first and second rotations of thearm 13. - Moreover, the
semi-pantograph device 18 advantageously comprises - a
rocker 31, which is pivoted to thebase 11 and has afirst arm 32a which is connected to thekinematic motor system 12, - a
linkage 33 for connection between thesecond arm 32b of therocker 31, which lies opposite thefirst arm 32a, and aslider 34, which is jointly connected to therod 16 and can slide in anelongated slot 35 formed on thearm 13 substantially longitudinally thereto. - Preferably, the
rocker 31 is pivoted to thebase 11 by means of ashaft 36, which is supported at its opposite ends by two plates of thebase 11. - A
stop element 37 is conveniently associated with theshaft 36 and is adapted to limit the sliding of therod 16 along thearm 13 when it is collapsed onto thebase 11. - In this configuration, the
stop element 37 conveniently is inserted in aslot 38 of abase element 39 of therod 16 and engages anend edge 40 thereof, thus preventing the movement of therod 16 in the direction for opening theshoe 14. - Further, the
base element 39 conveniently has slottedeyes 41 which are longitudinal thereto and within which theshaft 42 for pivoting thearm 13 to thebase 11 passes, such shaft being free to slide longitudinally therein during the relative sliding of therod 16 with respect to thearm 13 for opening and closing theshoe 14. - The axis of the
shaft 42 conveniently defines the rotation axis A. Advantageously, thefixed jaw 19 comprises - oscillating
contacts 43, which are pivoted to thearm 13, from which they protrude toward themovable jaw 19, -
abutments 44, which support theoscillating contacts 43 so as to contrast elastically the recession of theoscillating contacts 43 toward thearm 13 when theshoe 14 is closed on thedropper 15. - As an alternative, depending on the contingent requirements, the fixed
jaw 19 can comprisefixed contacts 45, bolted to thearm 13, as shown by way of non-limiting example inFigures 2 and5 . - The operation of the disconnector 10 according to the invention is as follows.
- In the closed configuration, the disconnector has
- the
arm 13 divaricated from thebase 11, in the contact configuration, - the
shoe 14 closed so as to grip thedropper 15, - the
rod 16 pushed by thesemi-pantograph device 18, by means of theslider 34, in a configuration of maximum stroke toward theshoe 14, so as to force it to close by means of the compression of thespring 22. - The
pivot 29 engages afirst portion 30a of theguide 30, which is extended substantially in a direction which is aligned with thearm 13 when it is in the contact configuration. - It should be noted that this configuration is fully to the advantage of the locking of the
arm 13 in the contact configuration, since thepivot 29 contrasts the rotation of thearm 13, abutting against the edges of thefirst portion 30a if it is not moved away from them first by way of the action of therod 16. - The opening of the disconnector 10 is provided as follows.
- The motor kinematic system acts on the
rocker 31, pushing itsfirst arm 32a in order to make it rotate about an auxiliary rotation axis C, which is parallel to the rotation axis A and is formed by the axis of theshaft 36, counterclockwise with reference toFigures 2 and3 . - Thus, the
second arm 32b pulls therod 16 so as to slide in thearm 13 toward thesecond end 13b, by means of thelinkage 33 that acts on theslider 34. - By jointly following the
rod 16, thepin 29 descends, disengaging thefirst portion 30a of theguide 30, moving away from the rotation axis A. - Simultaneously, the
abutment 23 jointly connected to thefirst end 16a of therod 16 moves away from the joint 25, partially relaxing thespring 22, thus reducing the tightness of theshoe 14 on thedropper 15. - Conveniently, the threaded
stem 25 has, at oneend 25a, inserted in thefirst end 16a, ashoulder 25b for engaging acomplementary shoulder 16b of thefirst end 16a. - Thus, at a predefined distance of the
abutment 23, during the descent of therod 16, theshoulder 25b abuts against thecomplementary shoulder 16b, which thus draws theconnector 24 to descend along thearm 13. - In this manner, the
connector 24, by descending toward thesecond end 13b of thearm 13, turns themovable jaw 20 with respect to apivot 46 thereof, which pivots it to thearm 13. - In this manner, the
shoe 14 releases thedropper 15. - Advantageously, a return spring, not shown in the accompanying figures, is provided between the
shaft 42 and theslider 34, to draw it back toward thesecond end 13b of thearm 13, in order to facilitate the opening of theshoe 14. - When the
slider 34 abuts against thelower end 35a of theslot 35, therod 16 has completed its stroke toward thesecond end 13b of thearm 13 and thepin 29 has exited from thefirst portion 30a of theguide 30. - In this configuration, the
movable jaw 20 is conveniently divaricated from the fixedjaw 19 enough to avoid interfering with thedropper 15 during the subsequent rotation of thearm 13 that collapses onto thebase 11. - The further thrust of the
motor kinematic system 12 on thefirst arm 32a of therocker 31 causes the rotation of thearm 13 about the rotation axis A, up to the disconnection configuration, in which it is collapsed onto thebase 11, as shown for example inFigure 2 . - Conveniently, there is a pair of torsion springs 47, which connects the
base 11 and thearm 13 so as to contrast its collapse onto such base and in order to facilitate vice versa its divarication. - During the collapsing rotation of the
arm 13, thepin 29 engages thesecond portion 30b of theguide 30, making therod 16 rise in thearm 13, such rod thus closing partially theshoe 14. - In this manner, when the disconnector 10 is open, the
shoe 14 is at least partially closed, so as to be protected against atmospheric agents and in particular against the formation of ice. - Vice versa, starting from this configuration, closure of the disconnector 10 occurs as follows.
- The motor kinematic system draws the
first arm 32a so as to turn therocker 31 about the auxiliary axis C clockwise with reference toFigures 2 and3 . - In this manner, the
second arm 32b pushes thelinkage 33, which however is locked by theslider 34, which is retained jointly by therod 16, which with thepin 29 engages the edge of thesecond portion 30b of theguide 30. - Thus, the
rocker 31 transmits its rotation to thearm 13, which is divaricated from the base 11 to the contact configuration, in which theshoe 14 has the fixedjaw 19 in abutment against thedropper 15. - The
movable jaw 20, during this rotation of thearm 13, is divaricated from the fixedjaw 19 by the action of therod 16, which is entrained by thepin 29, which slides along theguide 30 so as to move away from the rotation axis A, thus drawing therod 16 toward thesecond end 13b of thearm 13. - When the
arm 13 has reached the contact configuration, the further rotation of therocker 31 causes the sliding of therod 16 toward thefirst end 13a of the arm, pushed by means of thelinkage 33, which acts on theslider 34. - When the
rod 16 rises in thearm 13, - first the
spring 22 transmits the closure thrust from therod 16 to themovable jaw 20, which closes on thedropper 15 in abutment on the fixed jaw, - then, upon the further rise of the
rod 16 in thearm 13, thespring 22 imparts to the movable jaw the predefined force for clamping theshoe 14 on thedropper 15. - Moreover, advantageously the
arm 13 is composed of fourparallel plates 48, within which therod 16 is accommodated longitudinally. - In alternative and substantially equivalent embodiments, depending on the contingent requirements, such arm can be provided by means of just two plates, or with more than four plates, or such arm can be tubular or can have an open profile, such as a C-shaped profile.
- In practice it has been found that the invention achieves the intended aim and objects, providing a semi-pantograph disconnector that has a simpler structure and operation than currently known semi-pantograph disconnectors despite being at least as reliable and durable.
- Moreover, a disconnector according to the invention allows to adjust the grip force of the shoe on the dropper, to the full advantage of its adaptability to the most disparate contingent requirements.
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements.
- In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements and to the state of the art.
- The disclosures in Italian Patent Application No.
PD2010A000050 - Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (9)
- A semi-pantograph disconnector, comprising- a base (11) which supports a motor kinematic system (12),- an arm (13) which has, at a first end (13a), a grip shoe (14) for a dropper (15) and is hinged to said base (11) at the second end (13b) so as to be able to oscillate about a rotation axis (A) in order to pass reversibly from a disconnection configuration, in which said arm (13) is collapsed onto said base (11), to a contact configuration, in which said arm (13) is divaricated from said base (11) so as to connect by means of said shoe (14) to a dropper (15),characterized in that it comprises- a rod (16), which is functionally connected to said shoe (14) in order to actuate it,- a cam device (17) for actuating said rod (16), which coordinates kinematically the opening of said shoe (14), by means of said rod (16), and a first rotation of said arm (13), which corresponds to the transition from said disconnection configuration to said contact configuration,- a semi-pantograph device (18), which is functionally connected to said rod (16), to said arm (13) and to said motor kinematic system (12), defining a kinematic sequence for closing said shoe (14), by way of the action of said rod (16), after said first rotation of said arm (13), and a kinematic opening sequence of said shoe (14), by means of said rod (16), which is preliminary to a second rotation of said arm (13) which corresponds to the transition from said contact configuration to said disconnection configuration.
- The disconnector according to claim 1, characterized in that said arm (13) is tubular, said rod (16) being supported therein so that it can slide substantially coaxially.
- The disconnector according to one or more of the preceding claims, characterized in that said shoe (14) has a fixed jaw (19), which is connected to said arm (13), and a movable jaw (20), which is pivoted to said arm (13) and is connected to a first end (16a) of said rod (16) in order to be turned by it so as to close and open said shoe (14).
- The disconnector according to claim 3, characterized in that it comprises an element (21) for connecting said movable jaw (20) to said first end (16a) of said rod (16), said element being elastically flexible.
- The disconnector according to claim 4, characterized in that said connecting element (21) comprises a spring (22) which is compressed between an abutment (23) of said rod (16) and a connector (24) for connection to said movable jaw (20), in order to transmit between them a predefined closing force of said shoe (14), said connector (24) being connected to said rod (16) so that it can slide axially with respect to it.
- The disconnector according to one or more of the preceding claims, characterized in that said cam device (17) is formed by a pivot (29) which is jointly connected to said rod (16) and can slide along a guide (30) formed on said base (11).
- The disconnector according to claim 6, characterized in that said guide (30) defines for said pin (29) a spacing trajectory (B), for the opening of said shoe (14), and for subsequent radial approach with respect to said rotation axis (A), said pin (29) traveling along said trajectory (B) during said first and second rotations of said arm (13).
- The disconnector according to one or more of the preceding claims, characterized in that said semi-pantograph device (18) comprises- a rocker (31), which is pivoted to said base (11) and has a first arm (32a) which is connected to said motor kinematic system (12),- a linkage (33) for connection between the second arm (32b) of said rocker (31), which is opposite with respect to said first arm (32a), and a slider (34), which is jointly connected to said rod (16) and can slide in an elongated slot (35), which is formed on said arm (13) substantially longitudinally thereto.
- The disconnector according to one or more of the preceding claims, characterized in that said fixed jaw (19) comprises- oscillating contacts (43), which are hinged to said arm (13), from which they protrude toward said movable jaw (19),- abutments (44), which support said oscillating contacts (43) so as to contrast elastically a recession of said oscillating contacts (43) toward said arm (13) when said shoe (14) is closed onto said dropper (15).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD2010A000050A IT1398343B1 (en) | 2010-02-23 | 2010-02-23 | SEMI-PANTOGRAPH SECTIONER. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2362406A1 true EP2362406A1 (en) | 2011-08-31 |
Family
ID=42827316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10175102A Withdrawn EP2362406A1 (en) | 2010-02-23 | 2010-09-02 | Semi-pantograph disconnector |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2362406A1 (en) |
CN (1) | CN102163508A (en) |
BR (1) | BR112012021274B8 (en) |
IT (1) | IT1398343B1 (en) |
WO (1) | WO2011104207A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1204754A (en) * | 1958-07-22 | 1960-01-28 | Merlin Gerin | Support device for disconnectors |
US5186315A (en) * | 1990-07-19 | 1993-02-16 | Merlin Gerin | High voltage disconnecting switch |
-
2010
- 2010-02-23 IT ITPD2010A000050A patent/IT1398343B1/en active
- 2010-09-02 EP EP10175102A patent/EP2362406A1/en not_active Withdrawn
- 2010-09-15 CN CN2010102908164A patent/CN102163508A/en active Pending
-
2011
- 2011-02-21 WO PCT/EP2011/052523 patent/WO2011104207A1/en active Application Filing
- 2011-02-21 BR BR112012021274A patent/BR112012021274B8/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1204754A (en) * | 1958-07-22 | 1960-01-28 | Merlin Gerin | Support device for disconnectors |
US5186315A (en) * | 1990-07-19 | 1993-02-16 | Merlin Gerin | High voltage disconnecting switch |
Also Published As
Publication number | Publication date |
---|---|
WO2011104207A1 (en) | 2011-09-01 |
IT1398343B1 (en) | 2013-02-22 |
BR112012021274B1 (en) | 2020-09-29 |
ITPD20100050A1 (en) | 2011-08-24 |
CN102163508A (en) | 2011-08-24 |
BR112012021274A2 (en) | 2016-10-25 |
BR112012021274B8 (en) | 2020-10-20 |
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