• 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 switching device (1) having a switching drive (6), a pivot contact (31), a striking contact (41), a switching blade arrangement (5) with two separating blades (50) running parallel to one another and a clamping device (7), wherein the switching blade arrangement (5) pivotally mounted on the pivot contact (31) and by means of the switching drive (6) between a closed position and a switch-off is movable, and wherein the switch blade assembly (5) the pivot point contact (31) in the closed position so with the impact (41 ) connects that the two separating knives (50) sandwich the impacting contact (41) to provide a contact pressure, but which is released during the switching operation. The switching device (1) according to the invention is characterized in that the switching drive (6) with the clamping device (7) is coupled such that its biasing effective direction of a switch-on operation of the switching drive (6) is directed against. Thus, a switching device (1) is provided which ensures a sufficient contact pressure for increasing demands in the short-circuit current strength and at the same time requires a low driving force during switching operations.
    公开号:AT510917A2
    申请号:T15402011
    申请日:2011-10-20
    公开日:2012-07-15
    发明作者:Alfred Herzog
    申请人:Driescher Eltech Werk；
    IPC主号:
    专利说明:

    • * * * *
    description
    switching device
    The invention relates to a switching device with a switching drive, a fulcrum contact, a striking contact, a Schaltmcsseranordnung with two mutually parallel and jointly moving separating blades and a clamping device, wherein the switch blade assembly pivotally mounted on the fulcrum and movable by means of the switching drive between a closed position and an open position, and wherein the switch blade assembly connects the fulcrum contact in the switch-on position with the impact contact in such a way that the two release blades accommodate the impact contact while providing a contact pressure between them, which however is canceled during the shifting process.
    Such switching devices are primarily used as a circuit breaker in the operated in the medium voltage and high voltage power supply networks or the like, and thereby mostly outdoors, where they are usually executed one or more poles. However, such a switching device can also be used in tuft- or gas-insulated indoor switching devices, or in low-voltage switchgear. Switching devices are used for opening and closing of circuits, wherein for reasons of safety preferred designs are used, which visually clearly detect the switching state of the switching device based on the contacts. Typical rated currents which can be permanently conducted by such switching devices are, for example, between 400 A and 4000 A at a rated voltage of 12 kV to 38.5 kV. In the event of a short circuit, such switching devices must be able to reliably conduct currents of up to 160 kA for a short time, without the switching device being damaged in the closed state. Typical damage would be melting of the conductive material at cross-sectional bottlenecks or welding of two contact surfaces. Since in three-pole versions of the switching device, the three phases are arranged side by side - at high short-circuit currents also arise considerable magnetic forces in interaction between the parallel phases, which is a significant mechanical load To bring in contact points. For applications with correspondingly high demands on the short-circuit withstand current design of switching devices are known, which provide an arrangement of two parallel pivotable separating knives, between which a fixed contact is taken in the closed state of the switch, whereby the contact area doubles. In this case, in some switching devices in the closed state additionally a contact pressure is exerted in order to ensure sufficient conductivity between the contact surfaces. This contact pressure is produced in the prior art by means of a permanent pressurization, in which the parallel separating blades are pressed against one another by means of prestressed pressure springs to or against the fixed contact therebetween. Due to the contact pressure, however, during the switching operations, on the other hand, the frictional forces and the wear on the contact surfaces increase considerably.
    German patent DE 1 007 408 discloses a circuit breaker in which the double blade for turning on and off can be pivoted under reduced contact pressure. The contact pressure is achieved by a compression spring, which acts on the separating knife so that they are biased toward each other. A mounted on a drive rod double wedge, the width of which tapers towards the center, travels between the cutting blades and serves as a spreading device against the permanent contact pressure. Rollers on the inner surface of the separating knife roll off at the wedge surfaces, spread the double knife and lift the contact pressure between cutting blades and the contact between them.
    DE 1 942 952 A describes a circuit breaker with a double blade, which is acted upon by a bolt passing through this with external, prestressed pressure springs. The release of the permanent contact pressure is also carried out by an arranged between the separating knives spreader, which formed by three pyramidally arranged balls in a confining space -2 / 17-
    • · * · " becomes. A drive movement reduces the height of the confining space, causing the ball radii to press against and spread apart the inner surfaces of the cutter blades.
    DE 1 943 005 A finally shows a circuit breaker in which the double blade of the switching arrangement is likewise permanently compressed by external compression springs acting as tensioning device in order to establish contact with a fixed switching contact. Also in this construction, the contact pressure during a switching operation is canceled by an expansion body. For this purpose, a rotatably mounted bush is used with helical pitches on the end faces, which is arranged between complementary slopes on the inner surfaces of the cutting knife. By a pivotal movement triggered by the drive, the bushing spreads the double blade within a limited angle of rotation, even before it is pivoted out of the closed position. As soon as the contact pressure is released, the double blade can be moved into the switch-off position with little resistance. The two separating blades remain spread apart. When switching on the double knife is first pivoted to the fixed switching contact before the spread of the two cutting blades is canceled by a further movement of the drive and the springs unfold their bias.
    With the extension of the area of application even in areas with weak infrastructure, however, these circuit breakers are subject to increasing requirements with respect to their service life and, in particular, the short-circuit withstand capability, while at the same time insensitivity to contamination influences.
    The conventional constructions for producing a contact pressure on double blades are based as explained on a permanent external application by means of prestressed pressure springs. Due to the direct transfer of the spring force to the separating knife and a structurally low Fedemutzweg the contact pressure of such constructions is limited directly to the usual spring constant economically viable compression spring types. Both in the arrangement of the cutting blades, as well as arrangements on the outer sides of the possible dimensions corresponding to strong springs are extremely limited, since a projecting to the sides in parallel phase arrangements reduces the safety margin against arcing between the phases. Springs with suitable self-shafts, i. with small dimensions and the desired high spring constant, are hardly available as a standard version, so costly special springs must be used.
    Since such circuit breakers rest for long periods on the free air in the closed as well as in the open state, the construction is exposed to the influences of weather and pollution. Corrosion or dirt attracted by the use of polar grease can clog the contact surfaces and considerably increase the switching forces for switching the disconnector on and off after a long service life. In particular, the required breakaway torque for lifting and pivoting of the double blade exceeds the weight force by far in such a state set over time. To ensure a reliable separation consequently a disproportionately large dimensioning of the drive motor is necessary, which also has a negative effect on the manufacturing cost. 20
    The invention is therefore the object of developing a generic switching device such that it provides sufficient contact pressure for increasing requirements bet the short-circuit current strength and at the same time requires a low driving force during switching operations. 25
    This object is achieved by a switching device with the features of claim 1. This is characterized in particular by the fact that the switching drive is coupled to the clamping device such that its biasing effective direction of a switch-on operation of the switching drive is directed against. 30
    The invention thus provides for the first time that the pretensioning action of the tensioning device is not used to produce the contact pressure, but rather to support the position of the tensioning device. *** " **************************************************************************************. This is a complete departure from the previous principles of action.
    In this case, it has been recognized according to the invention that it is precisely the force required to release the separating blades from the stationary impact contact on the contact surfaces that is of considerable importance for the switching drive. Since here according to the invention no longer works as in the prior art against the spring force, etc. of the clamping device, but this step is supported by the clamping device, a significantly improved switching operation is possible. In this case, therefore, the stored spring force or otherwise applied clamping force when switching off the switch is used to keep the to be overcome breakaway torque when pivoting the cutting blade for the drive as low as possible.
    In addition, according to the invention there is a substantially greater freedom of design with regard to the structure by which the contact pressure is produced. This applies in particular to the clamping device, the dimensions of which are no longer limited, as in the prior art, by required lateral distances to parallel phases, etc. Thereby, e.g. larger spring lengths can be realized, whereby higher contact pressure values can be achieved. Due to the advantageous arrangement of the components between the separating blades further, the dielectric behavior of the entire switching device is substantially not affected.
    This significantly improves the reliability of the switching devices according to the invention over the prior art. In particular, particularly high short-circuit currents can thus be conducted via the switching device.
    Advantageous developments of the inventive switching device are the subject of the dependent claims.
    Thus, it is possible according to claim 2 that the switch blade assembly comprises a pair of pliers, which the two cutting blades in the closed position for - 5/17 -
    Production of the contact pressure presses on each other. This makes it possible to produce a high contact pressure with simple mechanical means. In addition, such a pliers arrangement is characterized by high reliability, high life expectancy and advantageous low maintenance.
    Furthermore, it is possible according to claim 3, that the switching drive comprises a shift lever which is pivotally connected to the tong assembly. The use of a shift lever for power transmission allows the spaced and function-oriented arrangement of the switching drive and the tong assembly. In addition, a proven and robust constructive element is used.
    It is advantageous if the shift lever is pivotable about a pivot axis, wherein the clamping device and the tong assembly are coupled to substantially opposite sides of the pivot axis on the shift lever. With the shift lever in addition to the operation of the pliers assembly thus the clamping device is biased. As a result, it is readily possible for a person skilled in the art to select a suitable lever ratio acting on the shift lever between the tensioning device and the pliers arrangement, whereby a high contact pressure can be achieved with a low driving force or with a small-sized switching drive.
    Here, the pivot axis of the shift lever may be formed by a pivot pin which is mounted in a slot of the shift lever, wherein the slot is aligned with its longitudinal orientation substantially parallel to the biasing effective direction of the tensioning device. This makes it possible to specify the contact pressure of the driven by the shift lever pliers assembly directly by the clamping force of the clamping device. The contact pressure can also be specified in a certain scope, regardless of the actuation of the shift lever purely by the dimensioning of the clamping device. This has the further advantage that the contact pressure can be made the same size regardless of any dimensional tolerances on the switching drive substantially at each circuit breaker assembly. It comes according to the invention to a shift of the pivot point of the shift lever in '-6 / 17- * «·» · · ♦ · »· · ·« ··· 4 · · · · »4 * ·· ·· ··· Μ
    Long hole after the pliers assembly can not perform any further closing movement, when the two cutting blades bear firmly against the impaction. Within the given by the slot movement space of the axle then acts directly the biasing force of the clamping device via the shift lever on the pliers arrangement.
    Another advantage is when the biasing force of the clamping device is adjustable. Then the contact pressure or the contact force on the main contacts can be suitably individually adjusted or readjusted on each switching device. This also allows dimensional tolerances on the mechanical structure even better account to be taken.
    In this case, the tensioning device can be a spring device. The use of a spring device ensures, in particular in the weather-affected field of application, a long service life and allows a relatively small size, a high spring force. Since the switching device according to the invention enables a spatial separation between the spring device and the outer surfaces of the separating knife, there is a high degree of design freedom compared to the prior art, whereby e.g. used larger spring lengths or one of the spring characteristic correspondingly larger Fedemutzweg can be used. Advantageously, the Schaltmcsseranordnung may have a second tong assembly in the region of the pivot contact, which is pivotally connected to the shift lever, and which presses the two separating blades in the closed position for producing the contact pressure to each other. In this embodiment, the generation of the contact pressure according to the invention can be produced on both contacts of the switching device, wherein a considerable friction generated by the contact pressure at the fulcrum contact is also canceled during the switching operations. With a suitable operative connection between the shift lever and the second forceps arrangement a simultaneous actuation of the two forceps arrangements is possible due to the common coupling to the same triggering element. - 7/17 - ·· * »» ··· ···· * · I · * # * * * * * * ** ·
    Another advantage of the invention is that the contact pressure within a contact region in which the inner surfaces of the switch blade assembly overlap with one of the contacts received between the inner surfaces is applied to the outer surfaces of the switch blade assembly. In particular, in such embodiments in the prior art, in which the separating blades are acted upon by means of a penetrating bolt and external, biased pressure springs, as well as other arrangements for permanently applying a contact pressure, the pressure of functional and structural conditions can not directly to the contact point, but be applied only in a surrounding area. Depending on the dimensions and material of the separating knife thereby creates a pressure loss and in particular a significant reduction of the contact surface, if at a corresponding pressure, the separating blades bend, so that their inner surfaces no longer rest flush against the flanks of the wrench. However, this disadvantage can be eliminated by this development of the present Erfingung.
    Furthermore, in an advantageous embodiment, a control cam may be formed on a shift rod, by means of which, at least during a switch-on of the switching device, a movement of the switching lever hinged on the shift lever is controllable, preferably a relationship between the controlled movement of the shift lever and a function of the pliers assembly consists. The cam causes suppressing the operation of the pliers assembly during the pivoting movement of the
    Switching blade assembly.
    The invention will be explained in more detail in exemplary embodiments with reference to the figures of the drawing. It shows:
    Figure 1 is a side view of the inventive switching device with a sectional view of the switch blade assembly in an open position. -8 / 17- «· · 4« 4 «* **** •« 41 «I 4« • * 4 «II» «I 4 · • 4 · · *« * ·· ·· 4 4 · I 4 4 ** * 4 ·· «4« 4 »* **
    Figure 2 is a perspective view of a cutting knife with shift lever, pliers assembly and clamping device.
    Fig. 3 is a plan view of the switch blade assembly with shift lever, pliers assembly and tensioning device;
    4 is a side view of the switching device according to the invention with a sectional view of the switch blade assembly in a closed position with a non-biased clamping device.
    5 is a side view of the switching device according to the invention with a sectional view of the switch blade assembly in a closed position with a prestressed clamping device.
    Figure 6 is a side view of another embodiment of the invention with an unlocked position of a shift rod with a control cam in an off position of the switching device.
    7 is a side view of a locked position of a shift rod with a control cam during a switch-on movement of the switching device. and
    Fig. 8 is a side view of an operating position of a shift rod with a Stuuerkurve in a closed position of the switching device.
    As shown in the figures, the switching device 1 has a base frame 2 on which on one side a fulcrum contact 31 on a first support insulator 3 and on another side a strike contact 41 on a second support insulator 4 is arranged. The first support insulator 3 and the second support insulator 4 are constructed essentially identical and each have an insulator body 32 and 42, respectively. -9 / 17- «· * · ·
    The switching device further comprises a switch blade assembly 5, which is pivotally mounted by a switching axis 33 at the pivot contact 31 and by means of serving as an actuated switching drive 6 between an open position (Fig. 1) and a closed position (Fig. 5) is pivotable. As can be seen in particular in Fig. 3, the switch blade assembly is formed by two parallel separating knife 50, which are interconnected by the switching axis 33 and further arranged over the length extension spacers. In this case, the impact contact 41 is received in the closed position of the switching device 1 between the separating blades 50. The impaction contact 41 has a width nearly equal to the distance of the separation blades 50 to make contact at the contact surfaces between the flanks of the impaction contact 41 and the inner surfaces of the separation blades 50.
    As can be seen in Fig. 1, the switching drive 6, a shift lever 60, a shift rod 61, an insulator body 62, a rotationally fixed drive member 63 and a drive shaft 64 on. The latter is mounted in the base frame 2 and extends transversely under the switch blade assembly 5 between the fulcrum contact 31 and the impact contact 41. The drive shaft 64 is coupled in a manner not shown with a drive motor or, in particular for emergency, with a manually operated crank handle. On the drive shaft 64, the rotationally fixed drive member 63 angekoppeh which extends in the radial direction of the drive shaft 64. The end of the drive member 63 is pivotally connected to the lower end of the shift rod 61, which extends in the direction of the switch blade assembly 5 upwards and the insulator body 62 which substantially corresponds to the Isolatorkörpem 32 and 42.
    The shift drive 6 further includes the shift lever 60 which is pivotally mounted via a pivot pin 65 between the cutting blades 50. The pivot angle of the shift lever 60 is limited by an upper stop 67A and a lower stop 67B, which are formed by spacers between the cutting knives. The shift lever 60 has for the purpose of storage on a slot 66 in which the axle 65 can both rotate and move. Furthermore, three switching points are formed on the shift lever 60 wherein a hinge point 60A is formed at the end of a long lever portion extending from the long hole 66 substantially in a longitudinal direction of the switch blade assembly 5 toward the switch shaft 33, and two hinge points 60B and 60C at a short lever portion extending extending substantially in the opposite direction from the slot 66 toward the free end of the switch blade assembly 5, are formed.
    At the pivot point 60A, the shift rod 61 is pivotally coupled to provide power transmission to the drive member 63 and the drive shaft 64, respectively. At articulation point 60B, a pull rod 81 is articulated, which establishes a connection to a pliers assembly 8. The articulation point 60C is finally connected to a tensioning device 7.
    As can be seen in particular Fig. 2, the Spanneinrichlung 7 includes a compression spring 70 and a spring retainer 71, wherein one end of the clamping device 7 is connected by a spacer between the separating blades 50 fixed to the switch blade assembly 5. The other end of the tensioning device 7 is connected via the pivot point 60 C to the shift lever 60. As can be seen by the comparison of Fig. 4 and Fig. 5, thus affects both a pivotal movement of the shift lever 60 about the pivot pin 65, as well as a lateral movement of the shift lever 60 to the axle 65 along the slot 66, on the bias the clamping device 7 off.
    The pliers assembly 8 has a plurality of angle levers 80 with Langlöchem 82, a Zuggestänge 81, a Zugachse 83, two axes of rotation 84 A and 84 B and two spacers 85 on. The tong assembly 8 is disposed at the free end of the indexing blade assembly 5 to compress the dividing blades 50 together in the region of the mating surfaces between the flanks of the wrenching contact 41 and the inner surfaces of the separating blades 50. As shown in FIGS. 2 and 3, the tong assembly 8 is formed by a plurality of opposing bellcrank levers 80 which engage the cutoff knives 50 at correspondingly -11 / 17- * * * * * * * * t * *. · «· · · · 4 ·« «·
    Pass through breakthroughs and stored in these. In this case, the outer legs of the Winkelhcbel 80 extend on the outer surfaces of the separating blade 50 in the direction of the free end.
    The inner legs of the angle lever 80 extend through the corresponding openings into the central region of the space between the separating blades 50, where they each have a slot 82 at its end. In addition, each angle lever 80 is rotatably mounted in the angular range on one of the substantially perpendicular axes of rotation 84 A and 84 B, which are arranged on both sides of the switch blade assembly 5. The axes of rotation 84A and 84B are held in the region of the upper and lower end by two spacers 85, which also pass through the separating blades 50 through corresponding openings and are stored in these.
    Further, in the middle region of the space between the separating blades 50, a pulling axis 83 extends perpendicularly through the superimposed slots 82 of the angle levers 80. The pulling shaft 83 is connected to the shift lever 60 via the articulation point 60B by means of a length-adjustable drawbar 81. Upon application of a tensile force on the pulling axis 83, the outer legs of the angle lever 80 pivot about the axes of rotation 84A and 84B against the outer surfaces of the separating knife 50, resulting in the mutual interaction of opposing the angle lever 80, a closing movement of the tong assembly.
    The operation of the sound device 1 will be explained below.
    To close the switching device 1, the drive shaft 64 is driven in the direction of rotation corresponding to clockwise in FIG. 1. In this case, the drive member 63 pivots, wherein the coupled to the end of the shift rod 61 is moved downward, in the illustrated in Fig. 1, the open state of the switching device 1, the switch blade assembly 5 via the seated on the lever 60 upper stop 67 A first in the raised position held. When the shift rod 61 now moves downward, the -12 / 17- * * · · · · ··· * * · * * Μ * i «·» lowers via the linkage point 60A.
    •. *, «·« * * «« · F »· I 4 I» 4M «* · t · · · · · · · · · * * * * * *
    Shift lever 60 from, on which the switch blade assembly 5 rests on the upper stop 67 A, so that the switch blade assembly 5 pivots due to gravity down. In this case, the separating blade 50 drive over the impact contact 41 and take it between them until they rest in a substantially horizontal position on a stop, not shown, on the impact contact 41.
    After completion of the first pivotal movement of the switch blade assembly 5 causes the switching drive 6 by the continuous downward movement of the Anlenkpunkts 60 A second pivotal movement of the shift lever 60 in the counterclockwise direction in Fig. 1 corresponding to the direction of rotation about the pivot pin 65. By the pivoting of the shift lever 60 is on the Zuggestänge 81, which is coupled to the pivot point 60 B, applied a tensile force for actuating the pliers assembly 8.
    When the pliers assembly 8 closes, the actuation path ends in the region of the pressure point at which the two separating blades 50 firmly abut against the impaction contact 41. The rotational angle of the second pivotal movement on the shift lever 60 is thus limited by the end of the actuation path of the pliers assembly 8 in the position in which the Zuggestänge 81 of the closed pliers assembly 8, which is coupled to the pivot point 60 B blocks further pivoting of the shift lever 60. As can be seen from FIG. 4, the position of the shift lever 60 in this switching state is between the upper and lower limit stops 67A and 67B.
    By means of the shift lever 60, however, the tensioning device 7 is also preloaded, which is also coupled to the shift lever 60 via the pivot point 60C. However, the path required to bias the tensioner 7 is longer than that resulting from the second pivotal movement of the shift lever 60 on the tensioner 7 when the end of the actuation travel of the tong assembly 8 is reached.
    Through the slot 66, however, the freedom of movement of the shift lever 60 is not limited to the rotational angle about the pivot pin 65. After the second pivotal movement is completed on the shift lever 60, the switching drive causes 6 - 13/17-t ί
    By the continuous downward movement of the Anlenkpunkts 60 A, a third pivotal movement of the shift lever 60 about the pivot point 60 B. The pivot point 60B thus provides the new pivot point for the third pivotal movement, which has been tested by the drawstring 81 of the closed tong assembly 8. The axle pin 5 65 shifts on a circular path section in the slot 66. By this third pivotal movement, the clamping device 7 is further biased until the shift lever 60 rests against the lower stop 67B. With completion of the third pivoting movement, the switch-on position of the switching device 1 is reached. 10 For the turn-off, the drive shaft 64 in the in Fig. 1 against the
    Driven clockwise corresponding direction of rotation, so that the above-described movements of the switching drive 6 and the switch blade assembly 5 run in reverse order and in the opposite direction. In this case, the starting of the switching drive 6 and in particular the release of the force applied to the tong assembly 8 contact pressure is supported by the bias of the tensioning device 7 7 so that the not dargestellle drive motor is relieved.
    For the described operation, the switching device 1 in a further 20, shown in FIGS. 6 to 8 embodiment, yet another function according to the invention, which comes into play in a special case of the power-on.
    As described above, the switch blade assembly 5 is in the 25-off position on the upper stop 67A on the shift lever 60 and thus pivots due to gravity down when the shift lever is lowered together with the shift rod 61 at power-on.
    At an increased set contact pressure at the fulcrum contact 31, at 30 contamination of the bearing on the switching axis 33, or the like, the friction at the fulcrum contact 31 may increase such that the switch blade assembly - 14 / 17-> ····· * # * * * * »· *** P · • j» 9 9 9,9 * 9 * 9 9 »t * * * #« · * · · * * * * * «* * ·. 9 * * 9 * * · 5 does not pivot downwards due to gravity as the shift lever 60 lowers during the switch-on movement.
    In this case acts on the switch blade assembly 5 in addition a downward traction of the sinking shift rod 61, which is transmitted by means of the shift lever 60 on the axle 65 on the switch blade assembly 5 and thus causes the first pivotal movement of the Schaltmcsseranordnung 5 down. However, the downwardly directed tensile force of the sinking shift rod 60 also simultaneously initiates the second pivoting movement of the shift lever 60 about the pivot pin 65 via the pivot point 60A.
    At high friction effects at the pivot contact 31 thus overlap the first pivotal movement of the switch blade assembly 5 and the second pivotal movement of the shift lever 60 in time, which could lead to premature operation of the forceps assembly 8, i. before the switch blade assembly 5 reaches the closed position.
    Under low-friction conditions, as described above, the transition from the first pivotal movement of the switch blade assembly 5 on the second pivotal movement of the lever 60 to operate the pliers assembly 8 only after the switch blade assembly 5 has reached the closed position, thereby ensuring that the contact pressure is only established when the impact contact 41 is retracted between the cutting blades 50.
    To more reliably achieve that a premature pressure build-up on the separating blades 50 makes it difficult or even prevent the retraction of the impacting contact 41, a control cam 68 is provided on the switching rod 61.
    The cam 68 is formed at a portion of the shift rod 61 opposite to the lower stopper 67B. If the second pivotal movement of the shift lever 60 is already initiated before reaching the closed position, the lower stop 67 B of the switch blade assembly 5 slides on the control cam 68 of the -15 / 17-
    Shift rod 61 along. The cam 68 provides a dependent of the pivot angle defined minimum distance between the lower stop 67 B and the pivot point 60 A of the shift lever 60 before. This minimum distance causes a shift of the shift lever 60 along the slot 66 in the direction of the pliers assembly 8 and against the biasing force of the tensioning device 7. The displacement of the shift lever 60 in the direction of the pliers assembly 8 is an actuation of the pliers assembly 8 by means of the coupled train linkage 81 during the Swivel movement of the switch blade assembly 5 suppressed.
    The cam 68 terminates at a point at which is determined kinematically due to the position of the shift rod 61 that the switch blade assembly 5 has reached the closed position. When the end of the cam 68 is reached, the tensioning device 7 pushes the shift lever 60 along the slot 66 by one of the previously effected bias corresponding spring travel.
    The shift lever is thus set back in its unlocked position and can again assume the above-described sequence of movements by a continuous downward movement of the switching drive 6 to apply a tension force on the coupled Zuggestänge 81 for actuating the tong assembly 8 via the pivot point 60B.
    The invention allows, in addition to the embodiment shown, further design approaches.
    Thus, it is also possible that instead of the forceps assembly 8, another device for clamping the cutting blade 50 is used. This need not necessarily produce the desired contact pressure via a lever relationship with one or more pivot points, but can achieve this, for example, in a linear movement by means of a thread pitch or a pressure-giving actuator (e.g., hydraulic cylinder, servomotor). - 16 / 17- • · »« * · * »· · · · ·
    The shift lever 60 may also have a different shape from the embodiment shown. Likewise, the coupling between the switching drive 6 and the tong assembly 8 by other elements such. Pinion and chain or rack etc., which are suitable for a corresponding mechanical operative connection. 5
    Furthermore, cs is also not required that the tensioning device and the tong assembly are coupled on opposite sides of the pivot axis on the shift lever 60; Rather, they may also be present on the same side next to the pivot axis and thereby attack each other entgegengerichlet at a point 10 of the shift lever 60.
    Instead of the elongated hole 66 may also be provided a circular hole for receiving the axle bolt 65. Furthermore, it is not necessary that the biasing force of the clamping device 7 is adjustable, as can be compensated by the spring travel possibly certain tolerance deviations.
    Instead of the compression spring 70, any other spring-elastic device or else another pressure-generating element, such as e.g. a motor device in the manner of a servomotor, and a hydraulic, pneumatic or magnetic drive or the like can be used.
    Furthermore, the forces between the tong assembly 8 and the shift lever 60 or tensioner 7 may also be controlled by tension members such as e.g. Bowden cables are transmitted. - 17 / 17-
    权利要求:
    Claims (10)
    [1]
    Claims 1. Switching device (1), in particular circuit breaker, having a switching drive (6), a pivot contact (31), a striking contact (41), a switching blade arrangement (5) with two separating blades (50) which move parallel to one another and a clamping device (50) 7), wherein the switch blade assembly (5) pivotally mounted on the pivot contact (31) and by means of the switching drive (6) between a closed position and a switch-off is movable, and wherein the switch blade assembly (5) the pivot contact (31) in the closed position so with the Impact contact (41) connects that the two separating blades (50) receive the impact contact (41) while providing a contact pressure between them, but which is canceled during the switching process, characterized in that the switching drive (6) coupled to the tensioning device (7) is that their biasing effective direction of a switch-on operation of the switching drive (6) counterclaimed is is.
    [2]
    2. Switching device (1) according to claim 1, characterized in that the switching blade arrangement (5) has a tong assembly (8) which presses the two separating blades (50) in the closed position for producing the contact pressure on each other.
    [3]
    Third switching device (1) according to claim 2, characterized in that the switching drive (6) has a shift lever (60) which is pivotally connected to the tong assembly (8). - 1/3
    [4]
    4. Switching device (1) according to claim 3, characterized in that the shift lever (60) is pivotable about a pivot axis, wherein the tensioning device (7) and the pliers arrangement (8) on substantially opposite sides of the pivot axis on the shift lever (60). are coupled.
    [5]
    5. Switching device (1) according to claim 4, characterized in that the pivot axis of the shift lever (60) by an axle bolt (65) is formed, which is mounted in a slot (66) of the shift lever (60), wherein the slot (66 ) is aligned with its longitudinal orientation substantially parallel to the biasing effective direction of the clamping device (7).
    [6]
    6. switching device (1) according to one of claims 1 to 5, characterized in that the biasing force of the clamping device (7) is adjustable.
    [7]
    7. switching device (1) according to one of claims 1 to 6, characterized in that the clamping device (7) is a spring device.
    [8]
    8. switching device (1) according to one of claims 1 to 7, characterized in that the switch blade assembly (5) has a tong assembly in the region of the pivot contact (31) which is pivotally connected to the shift lever (60), and which the two Disconnecting knife (50) in the closed position for producing the contact pressure to each presses.
    [9]
    9. Switching device (1) according to one of claims 1 to 8, characterized in that the contact pressure within a contact region, in which the inner surfaces of the switch blade arrangement (5) overlap with one of the contacts between the inner surfaces (31, 41), on the outer surfaces of the switch blade assembly (5) is applied.
    [10]
    10. Switching device (1) according to one of claims 1 to 9, characterized in that on a switching rod (61) a control cam (68) is formed, by means -2 / 3-



    at least during a switch-on movement of the switching device (1), a movement of the on the shift rod (61) hinged shift lever (60) is controllable. 5 -3 / 3-
    类似技术:
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    同族专利:
    公开号 | 公开日
    AT510917B1|2015-06-15|
    CZ305315B6|2015-07-29|
    CH704282A1|2012-06-29|
    AT510917A3|2014-08-15|
    CH704282B1|2015-06-30|
    CZ2011690A3|2012-06-27|
    DE102010061368B3|2011-12-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2246072A|1939-01-28|1941-06-17|Ite Circuit Breaker Ltd|Switching mechanism|
    DE1007408B|1952-04-23|1957-05-02|Driescher Spezialfab Fritz|Isolating switch with double knife|
    CH441466A|1965-09-09|1967-08-15|Siemens Ag|Disconnector|
    DE1943005A1|1969-08-23|1971-03-04|Siemens Ag|Isolating switch with expandable double knife|
    DE1942952A1|1969-08-23|1971-03-04|Siemens Ag|Isolating switch with expandable double knife|
    DE2737050A1|1977-08-17|1979-03-01|Bbc Brown Boveri & Cie|CONTACT DEVICE|
    DE19813177C1|1998-03-25|1999-08-12|Driescher Eltech Werk|Electric switch, esp. medium voltage switch for power supply networks|
    CZ8395U1|1998-11-05|1999-03-15|Ivep A.S.|Device of high or very high voltage distribution|
    CN201289810Y|2008-06-26|2009-08-12|黄勤飞|Box type intelligent double power transfer switch|
    CN201444459U|2009-03-26|2010-04-28|黄灿荣|Stable connection mechanism for high-voltage switching operation knife switch and auxiliary switch|EP3288050B1|2015-04-23|2021-11-10|ABB Schweiz AG|Potential transformer isolating device and gas-insulated switchgear|
    CN107017110A|2017-06-14|2017-08-04|中车株洲电力机车有限公司|A kind of disconnecting switch and its switch mechanism|
    CN110729148A|2019-09-20|2020-01-24|李中毅|Distribution network automation control device for power grid dispatching|
    CN112071601A|2020-09-16|2020-12-11|山东得胜电力股份有限公司|Disconnecting link type ignition device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE201010061368|DE102010061368B3|2010-12-20|2010-12-20|Switching device i.e. circuit breaker, for use in e.g. high voltage power supply system, has switching drive coupled with tensioning arrangement, so that preload effective direction of arrangement is directed against operation|
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