CN102047363B - Control for a high-voltage/medium-voltage electrical device having a short actuation time - Google Patents

Abstract

A drive device for a high-voltage/medium-voltage switch device comprising at least one actuator (6, 12) for opening/closing a switch of said device, a mechanism that can move a movable part of said switch and a force transmission element (8, 14) for transmitting a force between the actuator (6, 12) and said mechanism, said transmission element (8, 14) being formed by a flexible belt.

Description

The control device with short actuating time for high pressure/piezoelectricity subset

Technical field

The present invention relates to a kind of drive unit for high pressure switchgear and mechanical driving device, in particular for drive unit and the mechanical driving device of high pressure contact maker.The present invention be more particularly directed to comprise for carrying out the drive unit of the spring of the circulation on disconnection and closed contact maker.

Background technology

The drive unit for high pressure switchgear of known type comprises spring (being called tripping spring) for disconnecting contact maker and for the spring (being called switching-in spring) of closed contact maker.To combined floodgate springs preload lotus and hold it in a state, that is, make when providing the order of closed contact maker, the energy in retracting spring, to cause contact maker closed via mechanical coupler.Arrange drive unit, make the release of energy stored in switching-in spring cause, to tripping spring preload, tripping spring being remained in this state, until it receives the order that disconnects contact maker.

For disconnecting the use with closed reloading spring, provide the startup of quite short and stable a period of time, because carry out the mechanically duration of setting operation by the inertia of the load in spring (amount of energy) and moving component.

A demand that should be noted that the drive unit of the type is, must in the short switching time less than 1 second, carry out machinery and disconnect and closed procedure, and for example, be for 90 milliseconds (ms) of closure with for the grade of the 20ms to 30ms that disconnects.

In addition, actuated element is remained in its preload condition, until provide, disconnect or closed order.

As a result, actuated element must continue store mechanical energy in this way in the very long time.

In addition, the power that actuated element is also acutely applied within the very short time, especially itself and spring and with the region of the securing member of corresponding axis in.In the process of opening operation, all energy in retracting spring at once, in making from then on to discharge, produce sizable tensile stress, and the actuated element in the region of the securing member between the securing member between actuated element and tripping spring and actuated element and disconnection axle is applied to this tensile stress.Tensile stress can reach tens of thousand Ns of (kN), typically 30kN.

Therefore, design actuated element and with the connector of spring and axle, make it can bear relevant stress.

In addition, this drive unit can be subject to the impact of weather, and, must be to make it can bear the temperature from the scope of-50 ℃ to+50 ℃, and can adapt to accidental condensation the internal placement of drive unit.

This drive unit is also intended to use very long seeervice cycle, for example decades.

Finally, drive unit forms safety means, makes to guarantee its reliability.

As a result, this drive unit (especially transmitting the element of closing force and breakaway by it) is designed to, guarantees under condition very harsh aspect applied stress and external condition, operation reliably in the time of guaranteeing to grow very much.

The a succession of metal rolls of known use or cable be as actuated element, for example, and in the drive unit of describing in document FR 2778492.

Roller chain and cable provide safety in long time period.

Yet it has large quality, this can reduce the toggle speed of contact maker.

In addition, roller chain need to be lubricated, to avoid any fault in the transmission of power.In addition, it is easily corroded, and this also can cause the fault of drive unit.The place of wall scroll cable with transfer control signal is being provided, and its diameter must be enough greatly to support the power that is applied to it.This diameter increases the hardness of cable, and this makes to use large diameter guide wheel, thereby also increases the space requirement to this drive unit.

Therefore, an object of the present invention is, to high pressure switchgear, provide drive unit completely reliably, it has less inertia in its moving component, cause the characteristic time or the operating time that reduce, and it is compared with the drive unit of known type also has maintenance requirements and the cost reducing.

Summary of the invention

By realizing above-mentioned purpose for the drive unit of high pressure switchgear, this drive unit comprises actuated element between separating brake actuator and disconnection axle, actuated element comprises flexible-belt, meanwhile, between combined floodgate actuator and closed axle, also has the actuated element that comprises flexible-belt.

The belt that this flexible-belt is made by textile fabric, or many parallel cables, at least a portion length of described cable is embedded in flexible substrate.

Therefore, reduce the quality of actuated element, also can shorten actuating time thus.In addition, no longer must provide the lubricated of actuated element, make more easily to keep in repair.In addition, cost is lower than the cost of drive unit of type with chain.

Position by the stress being subject to being applied by actuator provides the special connector suitably adapting to, and makes to use this force transfer element.

The flexible-belt that comprises many cables has the following advantages:

It is flexible, makes to use the pulley that returns of minor diameter.By determining the quantity of cable and the diameter of cable be arrangeding in parallel, can optimize radius of curvature.Therefore, reduce overall dimensions.

Flexible-belt needs maintenance seldom or does not need repairing.

Due to the inertia reducing of flexible-belt, and reduce actuating time (actuating time).

Therefore, the present invention mainly provides a kind of drive unit for high pressure switchgear, comprise at least one actuator for the contact maker of switchgear described in cut-off/close, be suitable for the mechanism of the movable part of mobile described contact maker, and force transfer element, described force transfer element comprises flexible-belt.

For example, described flexible-belt is arranged between actuator and described mechanism.

Flexible-belt can have for by flexible-belt at its two ends and actuator and the end connector being connected with described mechanism, each end connector have for be fixed to flexible-belt one end fastening end and for connector being fixed to the bar extending or being fixed to the fastening end with the pin of described motion quadrature in the direction of motion of flexible-belt.

In one embodiment, flexible-belt comprises many cables, and described many cables are set parallel to each other and their at least a portion length is embedded in flexible substrate.Then, described matrix can extend continuously in most of length of described cable.

For example, described matrix can be made by thermoplastic, for example polyethylene.

Advantageously, by punching press, described cable is clamped in end connector.

Also described matrix can be clamped in end connector.

In one embodiment, at least one end connector forms porose, and the axis in described hole is directed in the direction of motion of flexible-belt, and each pore volume is received the free end of described cable, and, wherein, by punching press will every cable maintenance in position.At least one end connector can have with the axis quadrature in described hole and with comprise for the plane parallel of the axis in the described hole of cable the transverse holes of extending, pin is introduced in described transverse holes, the diameter of pin equals the diameter of transverse holes, so that the end of every cable is clamped between the periphery and pin of respective aperture, thereby before final assembling, provide pre-assembled by punching press.

Advantageously, at least one end connector has the face with respect to the plane inclination of the axis that comprises described hole, confining force on the cable that makes to obtain by punching press in the identical side of the closing end with hole than large in the side of opening end in hole, for example, described plane with respect to the axis that comprises hole angle of 1.5 ° that tilts.

In another embodiment, flexible-belt is made by textile fabric woven or braiding.For example, these textile fabrics are poly, polyester or aromatic polyamides.

By comprising the flexible-belt of the fiber of woven or braiding, at least one end connector can comprise parallel to each other and with the first axle and second axle of the direction of motion quadrature of flexible-belt, two axles are fixed to the tightening member of end connector, to be fixed to described mechanism or to be fixed to actuator, axle by every end of flexible-belt around end connector is wound around, the second axle is arranged between the described tightening member and the first axle of end connector, the end of folded flexible band is also fixed on the end of flexible-belt on end connector to form the mode of closed loop, this ring has inner face and outside, this ring so that its inner surface and first is coupling tactile mode at the first axle, around pass through, and tactile mode is around passed through at the second axle so that its outer surface and second is coupling, the ring portion of around passing through at the second axle comprises the flexible-belt of two overlapping thickness, and, the end of the ring being limited by the free end of flexible-belt is by extending and leave end connector along the first axle.

Described at least one actuator can comprise spring, and described mechanism comprises the lever being fixed on rotatably on the axle that is suitable for being connected with the movable part of contact maker.

Drive unit also can further comprise the jockey for flexible-belt and spring are linked together, and to exert all one's strength, along the axis of spring, between flexible-belt and spring, transmits.

The jockey that flexible-belt and spring are linked together can comprise the frusto-conical member being arranged in spring, and engage by the bottom of frusto-conical member and the end turns of spring, described frusto-conical member is connected with end connector via the screw rod being screwed in end connector, by the first nut, described screw rod is fixed to frusto-conical member.

Drive unit can advantageously further comprise that locknut, locknut comprise pipe and the second nut, are clamped in described pipe between the first nut and the second nut.Advantageously, the length of described pipe equals at least five times of diameter of screw rod.

Drive unit of the present invention also can further comprise jockey, and this jockey is for linking together flexible-belt and around the parallel axis pivotable of the axis with described axle with lever.

Lever can have the projecting shaft of the axis that is parallel to axle, and end connector has the hole with the direction of motion quadrature of flexible-belt, and described pore volume is received projecting shaft, and end connector can rotate around projecting shaft.

End connector can advantageously comprise two by connecting rod hinged part each other, the surperficial quadrature of hinge axes and flexible-belt.

For example, actuator is that contact maker disconnects actuator, and lever is to disconnect lever, and described axle is main shaft, and drive unit further has the second actuator that forms contact maker closing actuator.

Closing actuator can comprise the spring being connected with closed lever by described flexible-belt, closed lever is fixed on the closed axle that is parallel to main shaft, disconnecting lever is fixed on main shaft, fixing closed lever to rotate together with cam, cam is suitable for working on disconnection lever, to cause contact maker closed.

Drive unit also can further comprise has a tooth driving wheel for what drive the rotation of closed lever, has tooth driving wheel and is meshed by motor-driven gear train, makes thus spring under load.

The present invention also provides high pressure or the medium voltage switchgear equipment with drive unit of the present invention.

The present invention further provides the method that flexible-belt and end connector are assembled together, flexible-belt comprises many cables, parallel to each other and their at least a portion length of described many cables is embedded in flexible substrate, the free end of cable is not embedded in matrix, and, end connector forms porose, and the quantity in described hole is identical with the quantity of cable, said method comprising the steps of:

Corresponding hole is introduced in one end of every cable; And

In the mode that mainly makes bore deformation by punching press, the end connector at place, described hole is applied to the stamping press with cable quadrature.

Method of the present invention can further be included in the final assembling step of pre-assembled cable in described hole before.

Method of the present invention also can further comprise the step that the joint between flexible-belt and end connector is applied to sealing device, for example, by applying the slurry of polyurethane type.

Accompanying drawing explanation

Under the help of the following description and drawings, can more clearly understand the present invention, wherein:

Fig. 1 is according to the perspective view of the drive unit for high pressure or medium voltage switchgear equipment of the present invention example;

Fig. 2 shows the perspective view of a part for the drive unit shown in Fig. 1;

Fig. 3 is only the perspective view of contact maker closing actuator device;

Fig. 4 is the part perspective view of an execution mode of the connection between switching-in spring and flexible-belt;

Fig. 5 is the detailed view obtaining from Fig. 3, shows element of actuator and the connection between flexible-belt;

Fig. 6 shows the viewgraph of cross-section of an execution mode of the flexible-belt with feature of the present invention;

Fig. 7 A to Fig. 7 C is the cutaway view of an execution mode of the guide wheel that uses in drive unit of the present invention;

Fig. 8 A to Fig. 8 C shows respectively and is particularly suitable for fixedly perspective view, top plan view and the end view of an example of the end connector of the flexible-belt shown in Fig. 6;

Fig. 9 A shows the longitdinal cross-section diagram of another example of the end connector that is particularly suitable for fixing flexible band (it is the belt of being made by woven textile fabric), and Fig. 9 B and Fig. 9 C are its perspective views;

Fig. 9 D and Fig. 9 E are respectively perspective view and the end views of another modification of the end connector shown in Fig. 9 A to Fig. 9 C.

Embodiment

Fig. 1 and Fig. 2 show an execution mode of drive unit of the present invention by example, it has the spring as its disconnection and closing actuator.Certainly, should be appreciated that, utilize the drive unit of different actuators and different mechanical connectors not deviate from scope of the present invention.

This instantiation of drive unit of the present invention comprises for disconnecting the release mechanism MO of contact maker, for example, for cut-off breaker (not shown), and comprise the close mechanism MF for closed contact maker, these mechanisms are arranged in housing 2 abreast.The MO of Jiang Zheliangge mechanism is connected with main shaft 7 with MF, and main shaft 7 is connected with the movable part of contact maker itself.

Release mechanism MO comprises: be suitable for by distortion store mechanical energy and be suitable for the elastic device 6 that order that response disconnects contact maker discharges this energy; For transmitting the actuated element 8 of the power being applied by elastic device 6; And the lever 10 that can rotate together with main shaft 7.In the example shown, elastic device 6 is the helical springs that remain in preload condition.

Actuated element 8 is connected with one end of spring 6 its one end (invisible), at its other end 8.2, be connected with lever 10, make, the first locking system (invisible) trip lever 10, the power being applied on lever by spring via actuated element just causes main shaft to rotate in the first given direction of rotation, thereby causes disconnecting contact maker.

Close mechanism MF comprises: the order that is suitable for responding closed contact maker by distortion store mechanical energy being suitable for discharges the elastic device 12 of this energy; For transmitting the actuated element 14 of the power being applied by elastic device 12; Be fixed to axle 19 cam 18 of (be called closed axle, it is parallel to main shaft); Cam rotates and coordinates with lever 10 together with closed axle.In the example shown, elastic device 12 is the helical springs that remain in preload condition.

Actuated element 14 is connected with one end of spring 12 by one end 14.1, and be connected with disk 20 by the other end 14.2, this actuated element also clutch disk to rotate together with closed axle, make, for the locking device 11 1 locking in make position, discharge disk 20, the power being applied on disk 20 by spring just causes cam to rotate.By coordinating with lever 10, this causes main shaft 7 to rotate in the second direction of rotation relative with first direction, thereby causes closed contact maker.

Disk 20 has and has tooth rim circle, is arranged as with the gear train 21 being driven by motor (not shown) and coordinates, for the object of prestrain switching-in spring 12.

According to the present invention, actuated element 8 and 14 is flexible belt or flexible-belts, has substantially flat shape, that is, the cross section of its thickness is less than the cross section of its width.

In one embodiment, for example, can form these flexible-belts by woven or braiding textile fabric, for example, the fiber of polyethylene or aromatic polyamides, an example is Kevlar (registered trade mark).

In another embodiment, by example, flexible-belt can comprise many strip metals cable, wirerope for example, and described many strip metals cable is parallel to and arranges each other and its at least a portion length is embedded in the flexible material of thermoplastic-type, for example polyurethane.An example of the flexible-belt of this type has been shown in Fig. 6, wherein, can have seen together with the matrix 24 of cable 22 and flexible material and be parallel to setting each other.

Matrix 24 is fixed together cable, is convenient to hold flexible-belt, and reduces the stress that the surface pressing from cable produces.

Can advantageously think, matrix 24 covers the total length of cable, to protect it not corroded.

As the following describes, provide guide wheel with guiding flexible-belt.In an improved execution mode, only matrix 24 is arranged on by around the region of the cable not sliding on pulley; This of matrix lacks the flexibility that is further increased in the flexible-belt in its bending area.The form of guide wheel (seeing Fig. 7 C) can be adapted to this modification.

Below flexible-belt and spring with other mechanical organ between the detailed description being connected.

This describes based on close mechanism, but can be applied to equally release mechanism.

In Fig. 3, only can see close mechanism; Its part is depicted as longitudinally and is cut.

By jockey 26, the first end of flexible-belt 14 14.1 is attached to one end of spring 12.

Jockey 26 is guaranteed the axis of spring and is attached to the aligning between its part of flexible-belt, to guarantee the axis transmission power between spring and flexible-belt along spring.

Jockey comprises the frusto-conical member 28 being arranged in spring, and, this frusto-conical member have the member 28 engaging with the most end end turn 32 of spring bottom 30 first longitudinally end.Advantageously, bottom 30 is stairsteppings, and the cylindrical part 33 that comprises minor diameter more be so that can adapt to the second spring, and the second spring has minor diameter and is arranged in coaxially in the first spring.

Frusto-conical member has passage 35 at its second longitudinal end place.

Jockey 26 also comprises the bar 34 for the first end of flexible-belt 14 14.1 is connected with frusto-conical member 28, bar 34 penetrating vias 35.

In the example shown, make bar 34 form screw thread, and via one end 34.1, bar 34 is screwed in end connector 36, end connector 36 has screwed hole 38 and is fixed to the first end 14.1 of flexible-belt 14.

The first nut 40 is screwed on the screw rod 34 in the inside of frusto-conical member 28, and with the end wall adjacency of truncated cone.In the example shown, between the closing end of truncated cone and the first nut 40, arrange packing ring 42.

In order to prevent the loosening object of accident of nut 40, can advantageously provide locknut 44.

In the example shown, locknut comprises pipe the 46 and second nut 48, and this pipe encircles rod 34 is also arranged between the first nut 40 and the second nut 48 compressively.

Advantageously, pipe 46 length equals at least five times of diameter of screw 34.This length prevents that assembly from becoming and unclamps.

The minimum length of selector 34, makes, and first, can assemble and strain in advance from its resting position, secondly, allows mounting pipe 46 and stop nut 48 after the pretightning force of spring being adjusted to its right value.

As shown in Figure 4, can advantageously think, end connector 36 has the through hole 49 that leads to hole 38, so that can insertion tool, so that bar local deformation, thereby the mode that provides a kind of simple anti-stopping bar 34 to become and unclamp.Can design any device that other is separated from each other for anti-stopping bar 34 and end connector.

The second end 14.2 of flexible-belt 14 is fixed on pivotal part, and in this instantiation of close mechanism MF, this is disk 20.Therefore, with it, need not move itself and adapt to the mode placement of flexible band 14 of this rotation and the connection between disk.

For this purpose, end 14.2 comprises end connector 50, and it has and the direction of motion quadrature of flexible-belt the hole 52 parallel with the rotation of disk 20, and hole 52 is arranged as and holds axle 54, and axle 54 is fixed to disk and is parallel to disk axis.By end connector 50 pivotable freely on axle 54, axle 54 limits rotations thus.

By column bolt (stud) 56, end connector 50 and axle 54 are fixed on disk, as seen in Fig. 2.

In another execution mode shown in Fig. 5, in end connector 50 ', increase one degree of freedom, no longer this end connector is made to one, but the connecting rod 62 that comprises the first part 58 of being fixed on flexible-belt, is suitable for being arranged on rotatably the second part 60 on axle 54, the first part 58 and the second part 60 are linked together, and the pivotal axis 63 that limits the rotation of connecting rod on the second part 60, this axis with hold the axis quadrature in the hole 52 of axle 54.

This additional degree of freedom provides more flexibility, its make load can be on the whole width of flexible-belt balance, especially there is the flexible-belt that comprises many parallel cables, and it also makes load on all cables, equally to disperse.Then, this makes it possible to increase the load that can be applied to flexible-belt.

End connector 36 and 50 is advantageously formed from steel, to bear the mode of any impact applying.

An example that the core of flexible-belt is fixed to end connector is described below.

Advantageously, flexible-belt is fixed in the mode of end connector completely reliably guaranteeing, the cable of flexible-belt is clamped in end connector 36 and 50.

In Fig. 4 and Fig. 8 A to Fig. 8 C, can see the attachment of a type, it is suitable for comprising the flexible-belt of many parallel cables particularly well.End connector 36 has a plurality of blind holes 64 in its relative end of the end with forming hole 38, and each blind hole 64 is held one end of cable, and, blind hole is kept in end connector tight.The axis in hole 64 is included in the plane of the axis that comprises equally hole 38.

Hole 64 is parallel to each other, and each in these holes forms housing to the end of cable.With and flexible-belt in cable between the corresponding mode of relative distance these holes are relative to each other set.

Fig. 8 B shows the end connector that there is no cable.

Can advantageously cut sth. askew openend and the insertion end in hole 64, so that more easily insert in the hole cable.

Distortion by the hole that caused by punching press, is fixed on the end of cable in hole, and this causes closely clamping cable.

The diameter in each hole 64 is manufactured slightly greatlyr than the diameter of cable.

This distortion can be advantageously discontinuous, and carry out along hole.On the face 69 of end connector of plane that is parallel to the axis that comprises hole, apply power, and apply along the axis in hole, and on the whole surface of end connector, do not apply.Therefore, the material of end connector (being for example steel) is in the distortion around of the end of cable, and at least a portion in the empty space between the inner surface of filler opening and the metal wire of composition cable.

Fig. 8 A shows warp tool DF, and it does not have plane, but have, is formed with the surface of stretching out finger 65, and described finger is parallel to each other and be all parallel to the axis in hole 64 and extend.

In addition, advantageously, the clamping realizing in the region of the bottom in hole 64a is larger than the amount of the clamping realizing in the region of the openend 64b in hole; This has improved fixing.

As seen in Fig. 8 C, for example, this can be by making the face 69 that is applied with deformation force tilt to realize with respect to the plane that is applied with deformation force, and for example, inclination angle is 1.5 °; Or this can, by tool tilt is realized, can realize distortion with described instrument.

For example, the impression producing in end connector is the grade of 0.5 times of the diameter of cable.

In carrying out assembly manipulation, it is particularly advantageous being provided in hole 64, keeping the device of the end of cable before to the deforming step in hole itself, thereby avoids a cable to depart from the process of step that makes end connector distortion or the possibility of movement.

As shown in Fig. 8 A to Fig. 8 C, this realizes by forming hole 70,70Yu hole, hole 64 quadratures, and extend radially in each hole 64.When cable is arranged in hole 64, will have in dowel 72 introduction holes of the diameter identical with the diameter of transverse holes 70 and cable is out of shape a little, this makes it possible in advance cable and end connector are assembled together.For example, dowel 72 can penetrate about 0.3 millimeter (mm) in hole 64.

In addition, pin 72 has improved the tensile strength of the joint between cable 22 and end connector 36.

Can carry out assembled in advance by adhesive, wherein, preferably partly apply adhesive, for example, just in the 64a of the bottom in hole 64, apply.

By this assembly method, the intensity in the region of clamping region at least equals the intensity of flexible-belt itself.

Can arrange sealing, to protect cable not to be corroded in the region of its clamping region, for example, by applying polyurethane slurry (paste) on the side at matrix 24 and on the side of end connector 36.Also can arrange that matrix 24 is directly clamped in housing (not shown), housing is formed in end connector, is positioned at the upstream in hole 64 and limits gap.

In Fig. 9 A to Fig. 9 C, can see the fixing example of the flexible-belt of being made by textile fabric.

As seen, the end of flexible-belt is wrapped in to two axles in end connector around in Fig. 9 A to Fig. 9 C.

End connector 36 ' comprises the stirrup 74 with two parallel side walls 76, with the diapire 78 of bearing holes 38 ', described sidewall 76 is linked together, and is screwed into the screw rod 34 of an element that is suitable for being fixed to drive unit in hole 38 '.End connector 36 ' has the first axle 80 parallel to each other and that formed by short pin and the second axle 82, and the end of each axle is fixed in sidewall 76, and the second axle is arranged between diapire 78 and the first axle 80.

Below how flexible-belt to be wrapped in to axle 80 and 82 description around.The end of flexible-belt is folded into two and partially overlaps, and seal the free end of (hemmed) flexible-belt, for example, by glueing joint or sewing up, to form the mode of closed loop 90.This flexible-belt holds the first axle, then two flexible tapes put together, and, along the first axle, passing through and before occurring from end connector, be wrapped in around the second axle.

After flexible-belt being wrapped on axle, or before, form ring, therefore, making the first axle is movably, makes to be inserted in ring.

The identical plane of the plane of end with holding the ring occurring from end connector 36 ', be applied in the direction relative with the power on end connector 36 ' of being applied to by flexible-belt and act on the tensile stress on end connector 36 '.

Fig. 9 B and Fig. 9 C are the perspective views of the end connector of Fig. 9 A, there is no flexible-belt.

In this example, sidewall 76 has hole, and longitudinal end of axle is assemblied in this hole, and each axle has shoulder 88 at first end, and has screwed hole 89 at the second end, so that can assemble for the bolt 91 of fixed axis laterally.In the example shown, bolt has hexagonal head.

Fig. 9 D shows end connector 36 ", it is the improved form of end connector 36 '.This end connector 36 " be with the essential distinction of end connector 36 ', flexible-belt is fixed to end connector 36 ".

In this form, end connector 36 " comprise for flexible-belt the first fixing board 100 on end connector, with substantially with the first board 100 quadratures and make it possible to end connector 36 " the second board 102 of being connected with the suitable element of drive unit.

In this example, the second board 102 has hole (invisible), and the screw rod 34 that is fixed to the suitable element of drive unit is screwed in hole.

The mode of the axis that comprises screw rod 34 with the first board by the first board 100 with respect to the second board 102 orientations.

In the example shown, advantageously by compressing plate slab, end connector is made to one; Shaped portion 104 is connected the first board 100 with the second board; Shaped portion 104 has angle shape, to make in the following way the second board 102 be offset with respect to the first board: the axis of screw rod 34 is arranged in the plane of the first board 100, as seen in Fig. 9 E, wherein, end connector 36 has been shown in end view and in part longitudinal cross-section ".

The first board 100 comprises for the fixing similar mode with on end connector 36 ' by flexible-belt being wound on end connector and flexible-belt is fixed on to the device on end connector.

For this purpose, the first board 100 has three slotted holes 108,110 and 112, and these three holes, on the axis of the axis quadrature with flexible-belt, are separated by rod element 114 and 116 in each hole, and flexible-belt 14 is wound in around described rod element.

For example, by stamping tool, cut out these holes.

The winding of flexible-belt is identical with the winding in Fig. 9 A, and the function of rod element 114 is identical with axle 80, and the function of rod element 116 is identical with axle 82.Yet, advantageously, flexible-belt is wrapped in rod element 114 and 116 around after, flexible-belt penetrates in hole 108 again, movement along the first board 100 below therefrom.

End connector 36 " manufacture very simple because only need a compressing and punch steps.

Below only described the one end that is fixed on the flexible-belt on end connector, still, the other end of flexible-belt can assemble the end connector of same type certainly.

Fig. 2 shows the reinforcement lever 66 being fixed on disk 20, by end connector 50, the second end 14.2 of flexible-belt 14 is fixed on lever 66.Lever 66 is helped the transmission of power by reducing the flexibility of disk 20.

As mentioned above, by guide wheel 68 guiding flexible-belts, to change the direction of flexible-belt.

According to the diameter of the flexible-belt of its guiding, calculate the least radius of guide wheel.Now, by the present invention, the flexible-belt for comprising many cables (wherein, the diameter when diameter of every cable ratio only has a hawser is little), can be used the more pulley of minor diameter.Therefore, can reduce the overall dimensions of drive unit.

Fig. 7 A to Fig. 7 C shows some execution modes of these pulleys.Pulley is arranged on rolling bearing 92.

The surface 94 of the pulley contacting with flexible-belt can be various types of.As shown in Figure 7 A, it can be level and smooth, by the cylinder with the circular cross section being joined in side by two flipper guides 96, is formed.

The surface form that heart expands therein substantially, identical with the surface 94 ' in Fig. 7 B, flexible-belt is had to improved guiding.

In Fig. 7 C, surface 94 " there is the annular groove 98 with the axis coaxle of pulley, each in these grooves is suitable for holding a part for cable in the part of flexible-belt that exposes cable.

With the end with flexible-belt 14 and disk 20, be connected the connection (seeing Fig. 1 and Fig. 2) that identical mode obtains flexible-belt 8 and lever 10, that is, and by being installed to be around the end connector 77 that is parallel to the pivotal pin rotation of main shaft.In this instantiation, this pivotal pin is arranged between two plates 81, described plate 81 is parts of lever 10.

Being connected between the connection of flexible-belt 8 and spring 6 and flexible-belt 14 and spring 12 is similar, that is, and and together with connecting with screw rod by frusto-conical member (Fig. 3).

Should be expressly understood, at two ends, have different structure two end connectors flexible-belt within the scope of the invention.

It is below the explanation to the operation of above-mentioned drive unit by example.

Motor drives and has 20 rotations of tooth disk via gear train 21, and therefore, driving shaft 54 is around closed axle 19 rotations.This is the second end 14.2 of mobile flexible-belt 14 in one direction, makes the also first end 14.1 of mobile flexible-belt, with Compress Spring 12.

The first locking device 11 is arranged as, when the level of the energy in being stored in spring 12 is enough, prevents the rotation of disk 20, the level of described energy is corresponding through rotatablely moving of several years on top dead-centre (top dead center) with disk.

When sending the order of closed contact maker, the first locking device 11 discharges disk 20, uses power driver plate 20 rotations that applied via flexible-belt 14 by spring 12, thereby drives closed axle 19 and cam 18.Then, cam 18 contacts with lever 10, and lever 10 pivotables are with rotary main shaft 7 in the second direction of rotation, and this causes the motor element (contact) of mobile contact maker, thus closed contact maker.When contacting arrival make position by contact maker, the second locking device is locked lever 10.

Meanwhile, the motion of lever 10 applies pulling force on flexible-belt 8, and this causes compressing tripping spring 6.

Then motor operation, to reload switching-in spring 12, as mentioned above.

When sending the order that disconnects contact maker, the second locking device trip lever 10, use power activation lever 10 rotations that applied via flexible-belt 8 by spring 6, thereby rotary main shaft 7 also disconnects contact maker thus in the first direction of rotation.

High pressure drive unit of the present invention with flexible-belt as actuated element, can operation reliably in the sufficiently long time cycle.

In this, drive unit of the present invention has advantages of work without any need for lubricated, and making does not need it to safeguard, and has eliminated the danger of the wearing and tearing that caused by lack of lubrication.

In addition, actuated element is not easy corrosion.

The quality of the normally used roller conveyer of mass ratio of actuated element is little, and therefore, the amount of the energy that disconnection and closed procedure are required is less.In addition, owing to having reduced moving-mass, so disconnection and closing time can be reduced to about 3ms to 4ms.

In addition, the overall dimensions of flexible-belt is less than the overall dimensions of roller conveyer, makes the overall dimensions of drive unit itself can be less.

Finally, the original cost of these flexible-belt drive disk assemblies is more much lower than normally used, and this makes to reduce the original cost of drive unit itself, and, use the drive unit of the type of two force transfer element to make this effect more obvious.

With reference to an example, carry out above description, in this example, flexible-belt is for the power transmission between actuator and the lever of controlling organization.Yet, should be expressly understood, in for example, power transmission chain between actuator (, spring) and the current collector of high pressure switchgear, Anywhere, can use flexible-belt as above, in described switchgear, flexible-belt is applied to tension force.For example, flexible-belt as above is used in power transmission between controlling organization and circuit breaker, in the region of circuit breaker, tripping spring is set.

Claims (17)

1. for the drive unit of high and medium voltage switchgear, comprise that at least one is for the actuator (6 of the contact maker of switchgear described in cut-off/close, 12), be suitable for the mechanism and the force transfer element (8 that is connected two regions of the movable part of mobile described contact maker, 14), power must be transmitted between these two regions, described force transfer element is formed by flexible-belt, described flexible-belt comprise be intended to connection power a plurality of flexible stave in described two regions that must transmit betwixt and at least one the flexible transverse element extending between described a plurality of flexible staves, wherein said a plurality of flexible stave and described at least one flexible transverse element are textile fabrics woven or braiding.

2. the drive unit for high and medium voltage switchgear according to claim 1, wherein, described flexible-belt is disposed between described actuator (6,12) and described mechanism.

3. drive unit according to claim 2, wherein, described flexible-belt (8,14) there is the end connector (36,36 ' for this flexible-belt is connected with described mechanism at its two ends and described actuator (6,12), 36 "; 50,50 '), each end connector have for be fastened to flexible-belt one end fastening end and for by fastening connector to the upwardly extending bar in side in the motion of flexible-belt or be fastened to the fastening end with the pin of described motion quadrature.

4. drive unit according to claim 1 and 2, wherein, described textile fabric is poly, polyester or aromatic polyamides.

5. drive unit according to claim 3, wherein, each end connector (36, 36 ') comprise parallel to each other and with the first axle (80 of the direction quadrature of the motion of described flexible-belt, 114) and the second axle (82, 116), described the first axle and described the second axle (80, 82, 114, 116) be fixed to the tightening member (78 of described end connector, 102), to be fastened to described mechanism or to be fastened to described actuator, every end of described flexible-belt is around end connector (36 ', 36 " described the first axle) and described the second axle (80, 114, 82, 116) be wound around, described the second axle (82, 116) be arranged on described end connector (36 ', 36 " described tightening member (78), 102) and described the first axle (80, 114) between, the end of folding described flexible-belt is also fixed on the end of described flexible-belt on described end connector to form the mode of closed loop (90), described ring (90) has inner face and outside, described ring (90) is so that its inner surface and the first axle (80, 114) mode of contact is at the first axle (80, 114) around pass through, and so that its outer surface and the second axle (82, 116) mode of contact is at the second axle (82, 116) around pass through, at described the second axle (82, 116) ring portion of around passing through comprises the flexible-belt of two overlapping thickness, and, the end of the ring (90) being limited by the free end of flexible-belt is by along described the first axle (80, 114) extend and pass described end connector (36 ', 36 ").

6. drive unit according to claim 5, wherein, described at least one actuator comprises spring (6,12), and described mechanism comprises lever (10,66), described lever is fixed on the axle (7,19) that is suitable for being connected with the movable part of contact maker rotatably.

7. drive unit according to claim 6, further comprise the jockey (26) for described flexible-belt (14) and described spring (12) are linked together, to exert all one's strength, along the axis of described spring (12), between described flexible-belt (14) and described spring (12), transmit.

8. drive unit according to claim 7, wherein, the jockey (26) that described flexible-belt (14) and described spring (12) are linked together comprises the frusto-conical member (28) being arranged in spring (12), and described frusto-conical member engages by the bottom (30) of frusto-conical member and the end turns (32) of spring (12), described frusto-conical member (28) is connected with end connector (36) via the screw rod (34) being screwed in end connector (36), by the first nut (40), described screw rod (34) is fixed to described frusto-conical member (28).

9. drive unit according to claim 8, further comprise locknut, described locknut comprises pipe (46) and the second nut (48), and described pipe (46) is clamped between described the first nut (40) and the second nut (48).

10. drive unit according to claim 9, wherein, the length of described pipe (46) equals at least five times of diameter of described screw rod (34).

11. according to the drive unit described in any one in claim 6 to 10, further comprise jockey, described jockey is used for described flexible-belt (8,14) with described lever (10,66) link together and around the parallel axis pivotable of the axis with described axle (7,19).

12. drive units according to claim 11, wherein, described lever (10,66) has and is parallel to described axle (7,19) projecting shaft of axis, described end connector (50,50 ') has the hole (52) with the direction quadrature of the motion of described flexible-belt (8,14), described hole (52) holds described projecting shaft, and described end connector (50,50 ') can be around described projecting shaft rotation.

13. drive units according to claim 11, wherein, described end connector comprises by connecting rod (62) hinged two parts (58 each other, 60), described connecting rod (62) has the hinge axes (63) with the surperficial quadrature of described flexible-belt (8,14).

14. according to the drive unit described in any one in claim 6 to 10, wherein, described actuator is that contact maker disconnects actuator, described lever (10) is to disconnect lever, and described axle (7) is main shaft, described drive unit further has the second actuator that forms contact maker closing actuator.

15. drive units according to claim 14, wherein, closing actuator comprises the spring (12) being connected with closed lever (66) by described flexible-belt (14), described closed lever (66) is fixed on the closed axle (19) that is parallel to described main shaft (7), described disconnection lever is fixed on described main shaft (7), described closed lever (66) is fixed to cam (18) to rotate together with cam, described cam is suitable for working on described disconnection lever (10), to cause contact maker closed.

16. drive units according to claim 15, further comprise and have a tooth driving wheel (20) for what drive described closed lever (66) rotation, described have tooth driving wheel (20) and meshed by motor-driven gear train (21), makes thus spring (12) under load.

17. 1 kinds have according to the high pressure of the drive unit described in any one in claim 1 to 9 or medium voltage switchgear equipment.