• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a locking device for a hydro-mechanical spring-loaded drive for actuating a medium or high-voltage circuit breaker, with a working piston (1) which is guided in an axial recess located in a pressure housing or working cylinder (9) and with a memory spring arrangement (6) ), which cooperates with a locking bolt (5). The locking device comprises a first pressure region (21) and a second pressure region (22), which are under high pressure when the circuit breaker is switched on, and a third pressure region (23), which is permanently depressurized. When the circuit breaker is the perpendicular to the working piston (1) arranged latching pin (5) and the storage spring assembly (6) via a on the working piston (1) facing side of the locking bolt (5) arranged locking device (2, 3, 4) from the working piston (1) pushed away. At a pressure loss in the first and second pressure range (21, 22), only the spring force of the accumulator spring arrangement (6) acts on the detent pin (5), the detent pin (5) presses the detent device (2, 3, 4) into a working piston ( 1) located recess (10), and when exceeding the holding force of the accumulator spring assembly (6) displaces the working piston (1) the locking pin (5) by a locking pin (5) located rotatably mounted element (2) of the latching device (2, 3, 4) rolls over the surface of the working piston (1).
    公开号:CH707909B1
    申请号:CH00518/14
    申请日:2014-04-03
    公开日:2018-02-28
    发明作者:Sticker Claus；Klose Thomas；Ing Joerg Knospe Dipl；Ing Thomas Brenneis Dipl
    申请人:Abb Schweiz Ag；
    IPC主号:
    专利说明:

    Description: The invention relates to a locking or locking device for a hydromechanical spring storage drive for a high or medium voltage switch, in particular a circuit breaker, according to the preamble of claim 1. Furthermore, the invention relates to a hydromechanical spring storage drive for a medium voltage or high voltage circuit breaker, which has such a Includes locking or locking device.
    Hydraulic spring-loaded actuators for actuating high-voltage circuit breakers are known, for example, from DE 3 408 909 A1 and EP 0 829 892 A1 in that a spring element interacts with a movable storage piston guided in a hydraulic block.
    [0003] Hydromechanical spring-loaded drives usually have a working cylinder. A piston of the working cylinder is connected to a piston rod which can be moved by pressurizing a pressure volume. Furthermore, the piston rod is connected to an electrical circuit breaker, so that the electrical circuit breaker can be switched by moving the piston rod. To open the electrical circuit breaker, a hydraulic pressure is applied to the pressure volume in the working cylinder, so that the piston rod moves into a corresponding position.
    The pressure in the pressure volume is usually provided by a pressure cylinder, which is coupled to a mechanical energy store, such as a spring arrangement. If the circuit breaker is to be switched, the spring force on the pressure cylinder is released so that a working or system pressure builds up there, which is also present in the pressure volume of the cylinder via a hydraulic connection. The piston and the piston rod of the differential cylinder are moved by the working pressure in the pressure range.
    In order to protect hydromechanical drives of high-voltage circuit breakers against unwanted switching off when pressure drops on the drive, a latch designed as a locking pin is usually used, which fixes the working piston of the drive in a "ON" position.
    During commissioning or maintenance work as well as in depressurized slow switching, in which the working piston is moved without drive pressure, the locking bolt must be deactivated in order to avoid damage to the hydromechanical drive.
    If the work piston is to be moved without pressure during maintenance work, the locking pin tries to prevent this. So that the locking pin cannot intervene in this case, it has to be deactivated beforehand, since the latch designed as a locking pin otherwise works against the movement performed. If this is neglected or the locking piston or locking pin is incorrectly set, the hydromechanical drive becomes unusable.
    Based on this prior art, it is an object of the invention to provide a locking device for a hydromechanical spring storage drive of a high or medium voltage switch, in particular a circuit breaker of a gas-insulated switchgear, which avoids the aforementioned disadvantages from the prior art in that damage of the drive due to incorrect operation is excluded and time is saved by activating and deactivating the locking bolt which is no longer required.
    Furthermore, the invention relates to a hydraulic spring-loaded drive for a medium-voltage or high-voltage circuit breaker with the locking device according to the invention.
    This object is achieved by a locking device, also referred to as a locking device, with the features mentioned in claim 1 and by a hydromechanical spring-loaded drive according to claim 7.
    [0011] Further advantageous refinements of the present invention are specified in the dependent claims.
    The locking device according to the invention for a hydromechanical spring-loaded drive for actuating a medium or high-voltage circuit breaker comprises a working piston which is guided in an axial recess located in a pressure housing, also called a working cylinder, and a storage spring arrangement acting as a compression spring, with which when the circuit breaker is switched on, a Fluid is pressurized.
    The locking device according to the invention further comprises a first pressure range and a second pressure range which are under high pressure when the circuit breaker is switched on and a third pressure range which is depressurized when the circuit breaker is switched on.
    According to the invention, a locking bolt arranged perpendicular to the working piston is provided, which has a locking device on the side facing the working piston. When the circuit breaker is in the switched-on state, the locking pin and the storage spring arrangement are pushed away from the working piston and the locking pin is not in engagement with the working piston or does not block it.
    If there is a pressure loss in the first and second pressure range of the working cylinder, only the spring force of the storage spring arrangement acts on the locking bolt and the locking device interacting therewith. The spring force of the storage spring arrangement presses the locking device arranged on the locking bolt into a recess machined into the outer contour of the working piston, which is preferably designed as a groove.
    CH 707 909 B1 [0016] If the holding force of the storage spring arrangement, ie the axial force on the working piston resulting from the compression spring of the storage spring arrangement, is exceeded, the working piston displaces the locking pin by a rotatably mounted element, for example by means of a cylindrical pin, on the locking pin the locking device rolls over the surface of the working piston without damaging it.
    According to an advantageous aspect of the invention, the rotatably mounted element designed as a roller or roller, which engages with a pressure loss in the recess on the working piston, is guided by means of the cylinder pin in an elongated hole of the locking bolt, whereby the rotatably mounted element is held, free rotation of the roller is possible and falling out of the rotatably mounted element is avoided if the rotatably mounted element is not in contact with the working piston.
    An embodiment of the locking device according to the invention is further characterized in that the locking pin on its side facing the working piston has a separate support pin which cooperates with the rotatably mounted element. The support pin serves as a counter bearing for the rotatably mounted element, for example as a roller, so that the thin cylindrical pin remains unloaded.
    The support bolt and the roller or roller are advantageously made of hardened metal. The separate design of the support bolt enables simple and inexpensive manufacture of the locking device and the locking bolt.
    The further description of the invention and its advantages, as well as its configurations, are given below with the aid of exemplary embodiments which are illustrated in the drawing figures.
    Show it:
    [0021]
    1 shows a section of a hydromechanical spring-loaded drive with an exemplary embodiment of the locking device according to the invention for a circuit breaker of a gas-insulated high-voltage switchgear in a schematic sectional view, and
    2 shows a further schematic sectional view of the locking device according to the invention of the hydromechanical spring-loaded drive for the high-voltage circuit breaker.
    Fig. 1 shows a section of a hydromechanical spring-loaded drive with an exemplary embodiment of the locking device according to the invention for a circuit breaker of a gas-insulated high-voltage switchgear assembly comprising a working cylinder 9 in which a working piston 1 is guided in an axial recess, and a storage spring arrangement 6 acting as a compression spring, which is responsible for the movement of a locking pin 5. A cover plate 8 closes the working cylinder 9 in a pressure-tight manner.
    A spring arrangement, not shown, of the spring-loaded drive puts a fluid under pressure when the circuit breaker is switched on. The fluid pressurized by the spring arrangement of the spring-loaded drive biases the compression spring 6.
    The working cylinder 9 comprises a first pressure area 21 and a second pressure area 22 for applying a working or system pressure. When the working piston 1 is in the position shown in FIG. 1, the first pressure region 21 and the second pressure region 22 are connected to one another via the main valve.
    The working piston 1 arranged in the movement area formed by the axial recess of the working cylinder 9 is movable depending on a pressure difference between the pressure areas 21, 22.
    When the circuit breaker is switched on, the first pressure region 21 and the second pressure region 22 are under high pressure. A third pressure region 23, which interacts with the storage spring arrangement 6, is permanently depressurized.
    Perpendicular to the working piston 1, a locking pin 5 is arranged, which is pushed away from the working piston 1 via a locking device 2, 3, 4 arranged on the side of the locking pin 5 facing the working piston 1 and the storage spring arrangement 6. The locking device 2, 3, 4 is not in engagement with the working piston or does not block it.
    The locking device 2, 3, 4 comprises a roller or roller element 2, which is rotatably mounted on a cylindrical pin 3 and cooperates with a support pin 4, which is attached to the side facing the working piston 1 of the locking pin 5 ,
    The locking pin 5 is guided in a stopper 7, this guide preventing the twisting of the locking pin 5 and the locking device 2, 3, 4 by means of positive locking and ensures that the roller 2 is always correctly in the groove or recess 10 on the working piston 1 can intervene.
    In the event of a pressure loss, for example caused by leaks or during maintenance work on the circuit breaker drive, in the first and second pressure areas 21, 22, only the spring force of the storage spring acts
    CH 707 909 B1
    Order 6 on the locking pin 5 and the locking pin 5 presses the locking device 2, 3, 4 into the groove 10 located on the working piston 1, whereby an unwanted movement of the working piston 1, which is loaded by an external force, is prevented. The pressure of the insulating gas of the gas-insulated switchgear in the circuit breaker module presses on the piston or switch rod and thus on the working piston of the drive.
    If this external force exceeds the holding force of the compression spring of the storage spring arrangement 6, the locking pin 5 is pushed to the side by the working piston 1, the rotatably mounted element 2 designed as a roller or roller, which is rotatably mounted on the cylindrical pin 3, over the Rolls surface of the working piston 1 without damaging it.
    Thus, the working piston 1 can advantageously not be damaged if the roller 2 rotatably mounted on the cylindrical pin 3 is guided over the surface of the working piston 1.
    In a conventional rigid locking pin, the process described above, in which the rigid locking pin is moved or run over, would lead to chip formation due to friction between the locking pin and the working piston and thus lead to damage within the drive.
    The drive-over locking pin 5 described above, on the other hand, avoids damage to the drive due to incorrect operation and saves time that would otherwise be required for activation and deactivation of the conventional locking pin.
    In an advantageous embodiment of the locking device according to the invention, the roller or roller 2 and the groove 10 in the outer surface of the working piston 1 are designed such that the largest possible contact area is generated when the roller or roller 2 engages in the groove 10. For this purpose, the roller or roller 2 is designed with a curvature corresponding to the contact surface on the working piston 1. This gives a contact line instead of a tiny contact point, which increases the contact point. The larger contact point reduces the surface pressure of the two components 1, 2 in contact.
    As a result, the surface pressure of the components 1, 2 in contact in the region of the recess 10 is reduced.
    In the sectional view visible in FIG. 1 through the roller or roller 2, the circular shape of the groove 10 is made clear, via which the roller or roller 2 rolls.
    A provided first seal 11 separates the first pressure area 21 from the third pressure area 23 and a further seal 12 separates the third pressure area 23 from the environment. When the circuit breaker is switched on, the first pressure region 21 is under high pressure and the pressure region 23 is depressurized.
    A guide of the roller 2 by means of the cylinder pin 3 in an elongated hole of the locking pin 5 holds the roller 2 in position, enables free rotation and prevents the roller 2 from falling out as long as the roller 2 is not in contact with the working piston 1 ,
    End stops 13 in the interior of the working cylinder 9 prevent the locking pin 5 from protruding too far into the working piston 1.
    A further schematic sectional view of the locking device according to the invention of the hydromechanical spring-loaded drive for a high-voltage circuit breaker is shown in FIG. 2, an enlarged contact being advantageously visible through the curvature of the roller or roller 2.
    Reference symbol list [0042]
    Working piston rotatably mounted element, roller, roller cylindrical pin, cylindrical pin
    Support bolt, bolt, pin
    Indexing plunger, locking element
    Compression spring, storage spring arrangement
    Plug
    Cover element, cover plate, pressure-tight housing, working cylinder
    Recess, groove
    CH 707 909 B1 first seal, high pressure seal further seal, low pressure seal first pressure area second pressure area third pressure area
    权利要求:
    Claims (7)
    [1]
    claims
    1. Locking device for a hydromechanical spring-loaded drive for actuating a medium or high-voltage circuit breaker, with a working piston (1) which is guided in an axial recess in a pressure housing or working cylinder (9), and with a storage spring arrangement (6) designed as a compression spring, which interacts with a locking pin (5), comprising:
    - A first pressure range (21) and a second pressure range (22), which are under high pressure when the circuit breaker is switched on, and a third pressure range (23), which is depressurized, characterized in that
    - When the circuit breaker is switched on, the locking bolt (5) arranged perpendicular to the working piston (1) and the storage spring arrangement (6) via a locking device (2, 3, 4) arranged on the side of the locking bolt (5) facing the working piston (1) from the working piston (1) pushed away,
    - in the event of a pressure loss in the first pressure region (21) and second pressure region (22), only the spring force of the storage spring arrangement (6) acts on the latching bolt (5),
    - The locking pin (5) presses the locking device (2, 3, 4) into a recess (10) located on the working piston (1), and
    - If the holding force of the storage spring arrangement (6) of the working piston (1) is displaced, the locking pin (5) is displaced by a rotatably mounted element (2) of the locking device (2, 3, 4) on the locking pin (5) above the surface of the The working piston (1) rolls off.
    [2]
    2. Locking device according to claim 1, characterized in that when the holding force of the storage spring arrangement (6) of the working piston (1) is exceeded, the locking bolt (5) is displaced, the rotatably mounted element (2), which is designed as a roller or roller, which is on a cylindrical pin (3) is rotatably mounted, rolls over the surface of the working piston (1).
    [3]
    3. Locking device according to claim 2, characterized in that the roller or roller (2) by means of the cylinder pin (3) in an elongated hole of the locking pin (5) is guided, whereby a free rotation of the roller or roller (2) is made possible and a Falling out of the roller or roller (2) is prevented as long as the roller or roller (2) is not in contact with the working piston (1).
    [4]
    4. Locking device according to one of claims 1 to 3, characterized in that the recess formed in the outer contour of the working piston (1) is designed as a groove (10).
    [5]
    5. Locking device according to one of claims 1 to 4, characterized in that the locking bolt (5) on its side facing the working piston (1) has a support bolt (4) which cooperates with the rotatably mounted element (2).
    [6]
    6. Locking device according to claim 5, characterized in that the support bolt (4) and the roller or roller (2) are made of hardened metal.
    [7]
    7. Hydromechanical spring-loaded drive for a high or medium voltage circuit breaker with a locking device according to one of the preceding claims.
    CH 707 909 B1
    CH 707 909 B1
    类似技术:
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    EP2513937B1|2017-01-25|Fluid device
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    DE1513332C|Fast-closing switch, in particular special earthing switch
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    同族专利:
    公开号 | 公开日
    FR3004285B1|2017-12-08|
    US9791044B2|2017-10-17|
    US20140298983A1|2014-10-09|
    KR20140120846A|2014-10-14|
    CN104103448B|2018-06-01|
    CN104103448A|2014-10-15|
    DE102013005621B4|2021-05-06|
    DE102013005621A1|2014-10-09|
    HK1198725A1|2015-05-29|
    FR3004285A1|2014-10-10|
    CH707909A1|2014-10-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3408909A1|1984-03-10|1985-09-12|BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau|HYDRAULIC DRIVE|
    DE3611501C2|1986-04-05|1992-05-07|Bbc Brown Boveri Ag, Baden, Aargau, Ch|
    US5142259A|1991-05-16|1992-08-25|General Electric Company|Molded case circuit breaker with low friction latch arrangement|
    DE9111861U1|1991-09-23|1991-11-14|Abb Patent Gmbh, 6800 Mannheim, De|
    DE19637052A1|1996-09-12|1998-03-19|Abb Patent Gmbh|Hydraulic drive|
    DE60132164T2|2000-12-05|2009-01-02|Kabushiki Kaisha Toshiba|Combined drive device by fluid pressure|
    CN201294164Y|2008-11-14|2009-08-19|河南平高电气股份有限公司|Working cylinder for preventing high-voltage circuit breaker from being divided slowly|
    EP2492937B1|2011-02-23|2015-09-16|ABB Technology AG|Switching apparatus|
    CN202560694U|2012-05-02|2012-11-28|烟台未来自动装备有限责任公司|Hydraulic cylinder with non high-pressure-resistant approximate switch|
    CN202560494U|2012-05-03|2012-11-28|中国华能集团清洁能源技术研究院有限公司|Integrated solar thermal power generating system|CN109599275B|2018-11-05|2020-01-07|兰州万里航空机电有限责任公司|Anti-sticking locking device for aviation operating mechanism|
    法律状态:
    2017-09-15| PFA| Name/firm changed|Owner name: ABB SCHWEIZ AG, CH Free format text: FORMER OWNER: ABB TECHNOLOGY AG, CH |
    2020-03-13| PUE| Assignment|Owner name: ABB POWER GRIDS SWITZERLAND AG, CH Free format text: FORMER OWNER: ABB SCHWEIZ AG, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013005621.7A|DE102013005621B4|2013-04-04|2013-04-04|Locking device for a hydromechanical spring-loaded drive in a gas-insulated switchgear|
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