EP1011121B1 - Gas blast switch - Google Patents

Description

The invention relates to a gas pressure switch according to the German patent DE 196 31 323 C1.

There is a gas pressure switch described for Interruption of large currents is provided, in particular for interrupting currents in medium and High-voltage switchgear. The gas pressure switch has one Interruption point consisting of a first and a second contact piece is formed. The two contact pieces are with each other via a transmission device coupled. At least one of the contact pieces is with one Drive connected. In switching operation, the Contact pieces due to the transmission device each other opposite movements. For this purpose, the Transmission device on a lever on which two Rods are rotatably attached. With the first Contact piece is connected to an insulating material nozzle a free end facing away from the contact piece Coupling element is held. The coupling element is rotatable. with one of the two rods of the transmission device connected. The coupling element is used to transmit power from the first contact piece to the rod. The coupling element is ring-shaped and made of metal. In order to the coupling element is a shield that the electromagnetic fields within the pressure gas switch changed.

A similar gas pressure switch is from the European one Patent EP 696 040 B1 known. There is the Intermeshing gear transmission device Racks. The insulating material nozzle carries at its free The end of a shield that coaxially surrounds it the racks are attached. This shielding is reduced the electric field in the dielectric and mechanically high loaded upper end of the insulating material nozzle. About the Isolierstoffdüse and thus over the shield Transfer power to the racks.

Even if - as with the European patent specification EP 696 040 B1 - the metallic shield to a desired one Field reduction leads to the shielding at the same time the disadvantage that the caused by them Changes in electromagnetic fields at the overall design and dimensioning of the Gas pressure switch must be taken into account. This can to an increased effort in the manufacture of the Lead gas switch.

A forerunner of the European gas pressure switch Patent specification EP 696 040 B1 is from FIG European patent application EP 313 813 A1 known. There are the racks of the transmission device attached directly to the insulating material nozzle. On Coupling element or the like is not available. In the European patent application EP 313 813 A1 is however not explains how the racks are attached to the Insulating nozzle is to be executed so that the Switching forces occurring safely from the Racks are transferred to the insulating material nozzle.

The object of the invention is to provide a gas pressure switch create that requires little manufacturing effort, and the forces occurring in switching operation safely transfers.

This object is achieved by a Compressed gas switch according to claim 1 solved.

In the pressure gas switch according to the invention that exists Coupling element made of plastic. This has the advantage that the coupling element has no or a negligible one Influence due to a shielding effect on the electromagnetic fields within the pressure gas switch Has. In contrast to the German patent DE 196 31 323 C1 and the European patent EP 696 040 B1 has no adverse effects on the coupling element Design and dimensioning of the gas pressure switch. An increased effort in the manufacture of the Compressed gas switch according to the invention is not so far available.

At the same time, however, it is easily possible to use the Switching forces occurring safely over the Transfer coupling element. Unlike that European patent application EP 313 813 A1 consists of the Pressure gas switch according to the invention an additional Degree of freedom in that the coupling element is one of the Isolierstoffdüse is an independent component. This has the Advantage that the coupling element - completely independent of the Isolierstoffdüse - so designed and dimensioned may like this for a secure connection between the Rod, the coupling element and the insulating nozzle is required. Due to the independence of the Coupling elements from the insulating material nozzle open up Plenty of ways in which such safe power transmission is achievable.

Another advantage of the invention Gas switch is that through use the weight of the plastic coupling element the moving parts of the pressure gas switch is reduced. The reduction of the moving mass leads to a corresponding reduction in the required Drive energy, which has a positive effect on the costs and the Drive life.

Another advantage of the invention Gas pressure switch is that the coupling element due to the use of plastic easier and therefore can be manufactured more cost-effectively. costly Metal structures are not necessary.

In a further development of the invention Coupling element made of polytetrafluoroethylene (PTFE) and / or fiber-reinforced plastic. These materials bring the Advantage with them that they are very good mechanical and have electrical properties, especially high mechanical strength and high electrical Insulating properties.

In a further development of the invention Coupling element and the insulating nozzle a projection and an assigned recess. The head start on that Coupling element or attached to the insulating nozzle. The recess in the insulating material nozzle is corresponding or the coupling element available. Are mixed forms also possible. One or more can be used Projections or recesses may be present. The advantage such projections or recesses is in the simple feasibility of the same.

For example, a head start can be a pin-like, hook-shaped or protruding at an angle Act part of the coupling element or the insulating material nozzle. A recess can be a circular or undercut or otherwise opening in the Act coupling element or the Isolierstoffdüse. The The projection and the recess are in pairs adapted and interact in such a way that a safe Power transmission between the coupling element and the Insulating nozzle is guaranteed.

In a development of the invention, the coupling element positively connected to the insulating material nozzle. The The advantage of such a form fit is that it’s a particularly easy way to a safe power transmission from the insulating material nozzle to the coupling element can be achieved. For example can have several pin-shaped or hook-shaped projections engage associated recesses and with these one form a positive connection.

The surface forming the positive connection is preferably with the coupling element and the insulating material nozzle with each other are coupled, as large as possible. So that will advantageously the force to be transferred to a large one Area distributed so that the force per unit area is small becomes. This is equivalent to the fact that the material of the Coupling element and the insulating nozzle less stressed becomes.

In one embodiment of the invention, this Coupling element on a tongue that a groove in the Insulating nozzle is assigned. The tongue and the groove represent a particularly simple way of Realization of the projection and the recess. The The advantage of the tongue and groove connection is that it does a large area without any major design effort is formed with which the coupling element and Place the insulating material nozzle against one another. The area of the Positive locking can therefore be carried out without any further special measures be made very large. This ensures that the power to be transmitted is safe and without a greater stress for the coupling element and the Isolierstoffdüse can be transferred.

In a development of the invention, the spring and the groove is at least partially circular educated. This is a kind of Bayonet lock with which the coupling element and the insulating material nozzle can be connected to each other. Such a bayonet catch has the advantage that on the one hand the coupling element and the insulating material nozzle without connected a greater effort and - if required - can also be taken apart again can. On the other hand, as already mentioned, the Tongue and groove connection of the bayonet lock one generates a particularly large area with which the coupling element and the insulating material nozzle fit against one another in a form-fitting manner.

It is particularly advantageous if the tongue and the groove each form about a quarter circle. Preferably point the tongue and the groove two each other opposite quarter circles. This brings the Advantage with it that the area for the transfer of the Forces between the coupling element and the insulating material nozzle is further enlarged. It will also be simple on this Formed an approximately symmetrical bayonet lock, the main advantages with regard to Weight distribution and the resulting Has material stress on the moving components.

In a development of the invention, the spring of Coupling element of the groove of the insulating nozzle can be assigned and can be connected to it by a rotary movement. The Bayonet lock is closed as follows: The Coupling element is so with its spring Insulated nozzle that the spring just in that area is arranged in which there is no groove is; so it is possible that after that the spring through a rotational movement of the coupling element in the groove of the Insulating nozzle can be introduced; this rotary motion the coupling element is continued until the spring of the coupling element completely in the groove of the Insulating nozzle located; so that are the coupling element and the insulating nozzle connected to each other. To the Disassembly of the interconnected components can be done in reverse order. As before mentioned, the spring can also on the insulating nozzle and the groove can be present in the coupling element.

In one embodiment of the invention, this Coupling element, an insert part preferably made of metal, that is coupled to the rod. This turns it into transmitting power from the bar to the metal Insert part passed on. This indicates a larger one mechanical strength as a component made of plastic. This has the advantage that the same can be transmitted This results in smaller dimensions of the insert and if necessary also result in the coupling element. It is also achieved by the insert that the Rod is stored in a metal part.

In a further development of the invention, means for Fixing the insert part to the insulating material nozzle intended. This will transfer the power from the Insulating material nozzle reached on the insert.

A plate is preferably made of metal or plastic provided in a groove of the insulating nozzle is inserted, and screwed to the insert is. This represents a structurally particularly simple, however nevertheless very stable connection between the insert part and the insulating material nozzle. Depending on the selected material of the plate can then be used for a Secure fixation determines the required size of the plate become. If a metal plate is provided, it is sufficient to to provide a relatively small size of the plate so that this only negligible impact on the inside of the pressure gas switch existing electromagnetic Has fields. With a plate made of plastic, this has regardless of their size, none depending on the material shielding effect.

In one embodiment of the invention Coupling element means for fixing the same to the Assigned insulating material nozzle. The fixation of the Coupling element is therefore not carried out by the coupling element itself, but through independent components. this has the advantage that the fixing of the coupling element on the Isolierstoffdüse independent of the coupling element itself can be designed.

A half ring is preferably provided which fits into a groove the insulating nozzle is inserted, and the one with the Coupling element is screwed. The half ring exists for example from a plastic. This represents one structurally particularly simple, yet stable Connection of the coupling element and the insulating nozzle. Due to the use of plastic it has Construction no shielding effect.

In a further development of the various configurations the coupling element is approximately annular educated. It will be largely coaxial Design of the gas pressure switch also in the Coupling element continued. Also has the ring-shaped Training of the coupling element advantages in terms of Weight distribution and thus the mechanical stress of the moving components of the pressure gas switch.

In a further development of the various configurations the invention are means for protecting the coupling element intended. This ensures that when selecting the Material of the coupling element is not primarily For example, attention should be paid to heat resistance must, but instead, in particular, on the mechanical strength of the coupling element are taken into account can. Protection of the coupling element against excessive heat and other stresses, in particular due to hot Arc gases can then be generated by the mentioned protective means achieved.

For example, a ring is preferably made of Polytetrafluoroethylene (PTFE) provided with which the Coupling element is covered. On this constructively simple Wise is a particularly good protection against hot Arc gases reached.

In a further development of the various configurations the invention means are provided on the Coupling element are held, and the coupling element to back up. This ensures that the coupling element do not accidentally detach from the insulating material nozzle can. The functional reliability of the invention Compressed gas switch is increased.

Preferably a screw, for example a Plastic screw screwed into the coupling element, the forms a clamping connection with the insulating material nozzle. By the clamp connection becomes the coupling element opposite the Insulated nozzle secured. The the clamp connection producing screw represents a particularly simple Possibility to secure the coupling element realize.

In a further development of the various configurations According to the invention, the coupling element has a bore in which houses a bolt on which the rod is held. This has the advantage that the connection between the rod and the coupling element in particular simple type and with very little effort is solved constructively. To further improve the Power transmission between the bolt and the coupling element a corresponding socket can be inserted into the bore his.

Figur 1

zeigt eine schematische Schnittdarstellung eines ersten Ausführungsbeispiels eines erfindungsgemäßen Druckgasschalters;

Figuren 2 und 3a, 3b

zeigen eine schematische Schnittdarstellung einer Isolierstoffdüse und eines Koppelelements eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Druckgasschalters sowie eine schematische Draufsicht auf die Isolierstoffdüse und das Koppelelement;

Figuren 4a und 4b

zeigen eine schematische Schnittdarstellung einer Isolierstoffdüse und eines Koppelelements eines dritten Ausführungsbeispiels eines erfindungsgemäßen Druckgasschalters sowie eine schematische Draufsicht auf das Koppelelement,

Figuren 5a und 5b

zeigen eine schematische Schnittdarstellung einer Isolierstoffdüse und eines Koppelelements eines vierten Ausführungsbeispiels eines erfindungsgemäßen Druckgasschalters sowie eine schematische Draufsicht auf das Koppelelement; und

Figuren 6a und 6b

zeigen eine schematische Schnittdarstellung einer Isolierstoffdüse und eines Koppelelements eines fünften Ausführungsbeispiels eines erfindungsgemäßen Druckgasschalters sowie eine schematische Draufsicht auf das Koppelelement.

It is particularly advantageous if a screw, preferably a plastic screw, is screwed into the coupling element, which secures the bolt in the bore. This ensures that the bolt cannot accidentally come loose from the coupling element. The functional reliability of the compressed gas switch according to the invention is increased.

Figure 1

shows a schematic sectional view of a first embodiment of a pressure gas switch according to the invention;

Figures 2 and 3a, 3b

show a schematic sectional view of an insulating material nozzle and a coupling element of a second embodiment of a compressed gas switch according to the invention and a schematic plan view of the insulating material nozzle and the coupling element;

Figures 4a and 4b

1 shows a schematic sectional illustration of an insulating material nozzle and a coupling element of a third exemplary embodiment of a compressed gas switch according to the invention, and a schematic plan view of the coupling element,

Figures 5a and 5b

show a schematic sectional view of an insulating material nozzle and a coupling element of a fourth embodiment of a compressed gas switch according to the invention and a schematic plan view of the coupling element; and

Figures 6a and 6b

show a schematic sectional view of an insulating material nozzle and a coupling element of a fifth embodiment of a pressure gas switch according to the invention and a schematic plan view of the coupling element.

In the figure 1, a gas pressure switch 10 is shown, the to interrupt large currents in High-voltage switchgear is provided. The The gas pressure switch 10 is shown in FIG shown switched on position. With the shown Gas switch 10 is a Outdoor switch.

The gas pressure switch 10 has a tubular insulator 11 made of porcelain, for example, and is filled with an insulating gas, for example SF ₆ , in the interior formed by the insulator 11. The insulator 11 defines a central axis M, to which the compressed gas switch 10 is largely rotationally symmetrical.

The gas pressure switch 10 has two electrically conductive Contact pieces 12, 13, which is an interruption point for form the current to be interrupted. The two Contact pieces 12, 13 represent erosion contacts that lead to this are provided when interrupting the current resulting arc.

The first contact piece 12 is a so-called tulip contact, which on a first metal Contact body 14 attached and with this electrically connected is. The second contact piece 13 is concerned is a pin contact that is at the bottom of a pot-shaped second metal contact body 15 attached and with this is electrically connected. In the illustrated, switched on position of the pressure gas switch 10 protrudes pin-shaped second contact piece 13 in the tulip-shaped first contact piece 12 and is electrical with this connected.

The contact pieces 12, 13 are coaxial to the central axis M. arranged and in opposite directions displaceable. For this purpose, one Transmission device provided that a bell crank 16 with two arms 17, 18 of different lengths. To the longer arm 17, a rod 19 is rotatably held rotatable with the cup-shaped second contact body 15 and thus with the pin-shaped second contact piece 13 connected is. There is a rod 20 on the shorter arm 18 rotatably held by an opening 21 of the second Contact body 15 protrudes and in that of the second Contact body 15 formed interior with an there accommodated coupling element 22 is rotatably connected. The The bell crank 16 is pivotable about an axis 23.

The coupling element 22 is on the pin-shaped second Contact piece 13 facing free end of a Isolierstoffdüse 24 attached. In the illustrated surrounds the switched-on position of the pressure gas switch 10 the insulating nozzle 24 the pin-shaped second Contact piece 13.

The coupling element 22 is essentially ring-shaped formed and the insulating nozzle 24 is essentially tubular. The coupling element 22 is in one Plane arranged approximately transverse to the central axis M is aligned. The coupling element 22 and the Isolierstoffdüse 24 are coaxial to the central axis M arranged. The coupling element 22 and the insulating nozzle 24 are made of electrically non-conductive or insulating Material.

At its free end facing away from the coupling element 22 the insulating material nozzle 24 on the first contact body 14 attached, which in turn - as already mentioned - with the first tulip-shaped contact piece 12 is firmly connected.

The first contact body 14 is electrical in a first conductive power supply 25 out. The first Power supply 25 is at one of the two ends of the Insulator 11 led to the outside and accessible there. about the first power supply 25 are the first tulip-shaped Contact piece 12 and the first contact body 14 with one Connection of the pressure gas switch 10 electrically connected.

The second contact body 15 is electrical in a second conductive power supply 26 out. The second Power supply 26 is at the other end of the insulator 11 led to the outside and accessible there. About the second Power supply 26 is the second pin-shaped contact piece 13 and the second contact body 15 with the other Connection of the pressure gas switch 10 electrically connected.

At the free end of the cup-shaped second contact body 15 there is an electrically conductive current contact 27, in the switched on position shown in the Gas pressure switch 10 in electrical contact with the first Contact body 14 is. The current contact 27 provides one Nominal current contact, which is intended to the current of the switched-on gas switch 10 largely to lead.

The first contact piece 12 has a drive 28 coupled and is from this in the direction of arrow P Slidable coaxially to the central axis M. Is moving starting from the position shown of the gas pressure switch 10, the first contact piece 12 in the Figure 1 down, this longitudinal movement over the first contact body 14, via the insulating nozzle 24, via the coupling element 22 and the rod 20 on the Transfer lever 16. As a result, the The bell crank 16 is pivoted about the axis 23. This Pivotal movement of the bell crank 16 has the consequence that the Rod 19 a longitudinal movement in Figure 1 upwards performs. This longitudinal movement is in turn by the Rod 19 on the second contact body 15 and from there on the second contact piece 13 transmitted. The second Contact piece 13 thus moves upwards in FIG. 1. In this way, the first and the second contact piece 12, 13 pulled apart in opposite directions so that the Gas switch 10 in its off position in which there is no longer any electrical connection between the first and the second contact piece 12, 13.

For further description of the pressure gas switch 10 is on the German patent DE 196 already mentioned at the beginning 31 323 C1 referenced by explicit reference hereby in the description of the present Patent application is included.

A gas switch 30 is shown in FIGS. 2, 3a and 3b shown, the largely the gas switch 10 of Figure 1 corresponds. Similar components are therefore included marked with the same reference numbers.

In contrast to FIG. 1, the pressure gas switch 30 of Figures 2, 3a and 3b, however, not just one, but two transmission devices. So there are two Diverter lever 16 present, which has a total of four rods 19, 20 with the second contact body 15 and the Isolierstoffdüse 24 are coupled. The two Transmission devices of the pressure gas switch 30 of Figures 2, 3a and 3b are - in contrast to Figure 1 - arranged off-center, so that the axes 23 of their Deflection lever 16 not the central axis M of the Cut the pressure gas switch 30. For better illustration is the gas pressure switch 30 in Figure 2 from a shown in another direction as the gas pressure switch 10 of Figure 1.

The sectional plane of the pressure gas switch 30, which in the figure 2 is shown, runs approximately in FIGS. 3a and 3b along the line II. The top views of the Coupling element 22 and the insulating nozzle 24, which in the Figures 3a and 3b are shown in the figure 2 roughly in the direction of arrow I.

According to Figures 2 and 3a, the coupling element 22 is the Gas pressure switch 30 is annular and coaxial the central axis M. The inner diameter of the Coupling element 22 corresponds to the outer diameter of the Isolierstoffdüse 24. On the inner edge 31 of the coupling element 22 protrude two springs 32 inwards. The springs 32 are thus aligned transversely to the central axis M. Furthermore are the springs 32 approximately in the center of the inner edge 31 arranged. The springs 32 have an inward facing Edge that runs in a circle. Each of the two feathers 32 extends over approximately the area of a quarter circle, over 90 degrees. The two springs 32 are approximately arranged symmetrically opposite each other.

The insulating material nozzle 24 is shown in FIGS. 2 and 3b tubular and coaxial to the central axis M arranged. In the outer edge 33 of the insulating nozzle 24 introduced a circumferential groove 34 which is transverse to Center axis M is aligned. In two roughly symmetrical opposite areas 35 is the groove 34 opened upwards. The areas 35 are approximately circular trained and each extend over about one Quarter circle. In any case, the open ones extend Areas 35 over an angular range that at least is slightly larger than the angular range over which the two springs 32 of the coupling element 22 extend.

The springs 32 of the coupling element 22 are with respect to them Dimensioning on the grooves 34 of the insulating nozzle 24 customized. The springs 32 and the grooves 34 thus form one Art bayonet lock. Form when closed the springs 32 and the grooves 34 a positive Connection.

In the disassembled state, the springs 32 of the Coupling element 22 in the open areas 35 of the Insulating material nozzle 24 are inserted. After that it can Coupling element 22 can be rotated about the central axis M. In order to the springs 32 of the coupling element 22 into the grooves 34 the insulating nozzle 24 introduced. After about one They are a quarter turn, i.e. after about 90 degrees Springs of the coupling element 22 essentially completely within the grooves 34 of the insulating nozzle 24 and thus outside the open areas 35. This is the Bayonet lock closed. To open the Bayonet catch are the previous steps in reverse order.

It is used to prevent rotation for the coupling element 22 possible, for example a plastic screw in the Screw coupling element 22 in such a way that, for example the head of the plastic screw has a clamp connection the insulating material nozzle 24 forms. This is the coupling element 22 against rotation relative to the insulating material nozzle 24 secured.

There are two recesses 36 in the coupling element 22 present, which is the inclusion of the free ends of the two Bars 20 serve. The recesses 36 are within the Coupling element 22 in a to the central axis M approximately parallel direction aligned. About across the way Recesses 36 and thus approximately transverse to the central axis M. provided in the coupling element 22 two holes 37, of which each one of the holes 37 each one of the Recesses 36 is assigned. The holes 37 run approximately in the plane of the annular coupling element 22 and cut the associated recesses 36 approximately at right angles. Furthermore, the coupling element 22 two threaded holes 38 are present, which are approximately parallel to Center axis M are aligned and the holes 37 cut approximately at right angles.

A bolt 39 is provided in each of the bores 37. The rod 20 protruding into the respective recess 36 has an opening 40 through which the bolt 39 is put through. The bolts 39 are each one Plastic screw 41 secured in the respective Threaded holes 38 are screwed.

Via the coupling element 22, the drive 28 generated force from the insulating nozzle 24 on the rod 20 transferred. The coupling element 22 thus adjusts Power transmission element. When switching off, as well when switching on the pressure gas switch 30, the force from the groove 34 of the insulating nozzle 24 on the spring 32 of the Coupling element 22 transmitted. There is the power of that Coupling element 22 on the bolt 39 and from there to the Transfer rod 20. Due to the inclusion of the spring 32 of the coupling element 22 in the groove 34 of the insulating nozzle 24 and the resulting positive connection between the coupling element 22 and the insulating material nozzle 24 can be transmitted over a large force Contact surface of the insulating nozzle 24 on the Coupling element 22 are passed on. The contact area the two are about 90 degrees each extending springs 32 and the associated grooves 34 educated.

By the independent of the insulating nozzle 24 Formation of the coupling element 22 may relate to this its design and dimensioning to the rod 20 to be coupled and the one to be connected Isolierstoffdüse 24 are adjusted. In particular, the Tongue and groove connection between the coupling element 22 and the Isolierstoffdüse 24 adapted to the force to be transmitted become.

The coupling element 22 can also be due to its separate training made of a different material become like the insulating material nozzle. So that the coupling element 22nd due to a shielding effect not to one Change in electromagnetic fields within the Gas switch 30 can lead, the coupling element 22nd made of a plastic. In particular that is Coupling element 22 made of a fiber-reinforced plastic manufactured with particularly good mechanical properties has.

In these cases it can be provided that the Coupling element 22 on its second contact piece 13 facing end face for protection with a ring 42 is covered, the one against hot arc gases resistant material, especially made of Polytetrafluoroethylene (PTFE) is made.

The insulating nozzle 24 is made of an insulating Plastic, especially polytetrafluoroethylene (PTFE) manufactured, the particularly good insulating and has heat-resistant properties.

In conclusion, we would like to point out that the pressure gas switch 10 of Figure 1, the features of Coupling element 22 and the insulating nozzle 24 has, such they in connection with the pressure gas switch 30 of the figures 2, 3a, 3b are described. In particular, the tongue and groove connection identical there. Instead of each two recesses 36, two bolts 39 and two rods 20 but there is always only one corresponding component available.

4a, 4b, 5a, 5b, 6a, 6b are pressure gas switches 50, 70, 80 shown, the largely the gas switch 10, 30 of Figures 1, 2, 3a and 3b correspond. Similar components are therefore the same Reference numbers marked.

The pressure gas switches 50, 70, 80 of Figures 4a, 4b, 5a, 5b, 6a, 6b are like the pressure gas switch 30 of the figures 2, 3a, 3b, each with two transmission devices and thus provided with two rods 20.

The sectional planes of the pressure gas switches 50, 70, 80, which in Figures 4a, 5a, 6a are shown in the Figures 4b, 5b, 6b approximately along the line A. Die Top views of the coupling element, which are shown in FIGS. 5b, 6b are shown in FIGS. 4a, 5a, 6a approximately in the direction of arrow B.

According to FIGS. 4a and 4b, the pressure gas switch 50 a coupling element 51, which is annular and is arranged coaxially to the central axis M. The inner one The diameter of the coupling element 51 corresponds to the outer one Diameter of the coupling element 51 associated Isolierstoffdüse 52. On the inner edge 53 of the coupling element 51 a circumferential projection 54 protrudes inwards. The Projection 54 is thus aligned transversely to the central axis M. Furthermore, the projection 54 is flush with that Surface of the coupling element 51 arranged with the free end of the insulating material nozzle 52 corresponds.

The insulating material nozzle 52 is tubular and arranged coaxially to the central axis M. The Insulating material nozzle 52 has a circumferential recess 55 provided at the free end of the insulating nozzle 52 is arranged, and that with regard to its dimensioning corresponds to the projection 54 of the coupling element 51. The Coupling element 51 can thus with its projection 54 in the Return 55 of the insulating material nozzle 52 are inserted.

The coupling element 51 is made of plastic, in particular from polytetrafluoroethylene (PTFE) and / or fiber-reinforced plastic.

In the coupling element 51, two are opposite one another arranged recesses 56 are provided, in each of which a metal insert 57 is added. The Formations and dimensions of the recesses 56 and the associated insert parts 57 are in such a way together adjusted that the insert parts 57 essentially can be inserted into the recesses 56 without play.

In the insert parts 57 is in each case in connection with FIGS. 2, 3a, 3b already explained recess 36 and Hole 37 included. The bolt 39 is in the bore 37 on which the rod 20 with its opening 40th is attached. In contrast to Figures 2, 3a, 3b 4a, 4b is the bolt 39 in the Insert part 57 stored.

One is at least partially in the insulating material nozzle 52 circumferential groove 58 introduced. On the free end of the Isolierstoffdüse 52 facing away from the coupling element 51st two partially annular metal plates 59 are provided, the thickness of which is adapted to the groove 58. Each of the plates 59 extends over the smallest possible Angle range. The plates 59 are with their inner edge 60 inserted into the groove 58.

The two plates 59 are in that area of the Coupling element 51 arranged in which the two Insert parts 57 are. There are holes and holes in the plates threaded holes are contained in the insert parts 57, so that each of the insert parts 57 with the respectively associated one Plate 59 firmly connected by means of a metal screw 61 can be.

The threaded bores 38 indicated in FIG. 4b are as already explained - to secure the bolts 39 intended.

When the pressure gas switch 50 is switched off, the becomes transmitting force from the insulating nozzle 52 via the groove 58 passed on to the plates 59 and from there on Metal screws 61 on the in the coupling element 51st included insert parts 57. Of these, the force is about the bolts 39 passed on to the rods 20. At the Switching on the power transmission takes place from the return 55 of the insulating nozzle 52 on the projection 54 of the Coupling element 51.

According to FIGS. 5a and 5b, the pressure gas switch 70 has a coupling element 71, which as such with the Coupling element 51 of the pressure gas switch 50 of FIGS. 4a, 4b corresponds identically. In contrast to the figures 4a, 4b, however, the coupling element 71 is not connected to the provided metal plates 59, but with two semi-annular plates 72 made of plastic consist, in particular of polytetrafluoroethylene (PTFE) and / or made of fiber-reinforced plastic.

The plates 72 have a thickness that the groove 58 in the Isolierstoffdüse 52 is adjusted. The plates 72 are in this groove 58 inserted and each extend over almost 180 degrees. The metal insert parts 57 are with screwed the plates 72. For this are metal or Plastic screws 73 are provided.

When the pressure gas switch 70 is switched off, the becomes transmitting force from the insulating nozzle 52 via the groove 58 passed on to the plates 72 and from there on Metal or plastic screws 73 on the in the Coupling element 71 contained insert parts 57. Of these the force is transmitted to the rods 20 via the bolts 39 passed. When switching on Power transmission from the recess 55 of the insulating nozzle 52 on the projection 54 of the coupling element 71.

According to FIGS. 6a and 6b, the pressure gas switch 80 a coupling element 81 which, in contrast to the Coupling elements 51 and 71 of Figures 4a, 4b, 5a, 5b none Insert parts 57 has. Instead, it is im Already explained in connection with Figures 2, 3a, 3b Recess 36 and bore 37 as described there, however opposite each other twice in the coupling element 81 immediately included. In the holes 37 is the Bolt 39 added to the rod 20 with their Opening 40 is plugged.

The coupling element 81 is made of plastic, in particular from polytetrafluoroethylene (PTFE) and / or fiber-reinforced plastic.

As with the coupling element 71 of FIGS. 5a, 5b, this is Coupling element 81 of FIGS. 6a, 6b with two half rings 82 firmly connected in the groove 58 of the insulating nozzle 52nd intervention. The half rings 82 are over a plurality of Plastic screws 83 evenly over the entire circumference screwed to the coupling element 81.

The power to be transmitted is switched off by the Insulating material nozzle 52 via the groove 58 onto the half rings 82 passed on and from there via the plastic screws 83 to the coupling element 81. From this the force is on the bolts 39 passed on to the rods 20. At the Switching on the power transmission takes place from the return 55 of the insulating nozzle 52 on the projection 54 of the Coupling element 81.

In conclusion, it is noted that it is - different 3a, 4b, 5b, 6b - is also possible, that the two with the coupling element 22, 51, 71, 81 connected rods 20 not offset on the same attack, but symmetrically. In this case they are Axes of the holes 37 and the pin 39 coaxial arranged to each other.

Claims (20)

1. Compressed-gas circuit breaker (10, 30, 50, 70, 80) with the following features:

   the compressed-gas circuit breaker (10, 30, 50, 70, 80) has a first and a second contact piece (12, 13),

   the contact pieces (12, 13) are coupled to each other via a transmission device,

   a nozzle made of insulating material (24, 52) is connected to the first contact piece (12),

   the transmission device comprises a rod (20),

   the rod (20) is connected to the nozzle made of insulating material (24, 52) via a coupling element (22, 51, 71, 81),

   the coupling element (22, 51, 71,81) is made of a plastic material.
2. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to claim 1,
   wherein the coupling element (22, 51, 71,81) is made of polytetrafluorethylene (PTFE) and/or a fibre-reinforced plastic material.
3. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to any of claims 1 or 2, wherein the coupling element (22, 51, 71,81) and the nozzle made of insulating material (24, 52) are provided with a projection and an associated recess.
4. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to any of claims 1 to 3, wherein the coupling element (22, 51, 71,81) is positively connected to the nozzle made of insulating material (24, 52).
5. Compressed-gas circuit breaker (10, 30) according to any of claims 1 to 4,
   wherein the coupling element (22) is provided with a spring (32) allocated to a groove (34) in the nozzle made of insulating material (24).
6. Compressed-gas circuit breaker (10, 30) according to claim 5, wherein the spring (32) and the groove (34) are designed at least partially circular.
7. Compressed-gas circuit breaker (10, 30) according to claim 6, wherein the spring (32) and the groove (34) each form approximately a quarter circle, preferably two quarter circles facing each other.
8. Compressed-gas circuit breaker (10, 30) according to any of claims 5 to 7,
   wherein the spring (32) of the coupling element (22) can be allocated to the groove (34) of the nozzle made of insulating material (24) and connected thereto by a rotary movement.
9. Compressed-gas circuit breaker (50, 70) according to any of claims 1 to 4,
   wherein the coupling element (51, 71) has an insert (57), preferably made of metal, which is coupled to the rod (20).
10. Compressed-gas circuit breaker (50, 70) according to claim 9, wherein means for the location of the insert (57) on the nozzle made of insulating material (52) are provided.
11. Compressed-gas circuit breaker (50, 70) according to any of claims 9 or 10,
    wherein a plate (59, 72) made of metal or a plastic material is provided, which is inserted into a groove (58) of the nozzle made of insulating material (52) and bolted to the insert (57).
12. Compressed-gas circuit breaker (80) according to any of claims 1 to 4,
    wherein the coupling element (81) is allocated means for its location on the nozzle made of insulating material (52).
13. Compressed-gas circuit breaker according to claim 12, wherein a half-ring (82), preferably made of a plastic material, is provided, which is inserted into a groove (58) of the nozzle made of insulating material (52) and bolted to the coupling element (81).
14. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to any of claims I to 13, wherein the coupling element (22, 51, 71, 81) is designed approximately annular.
15. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to any of claims 1 to 14, wherein means for the protection of the coupling element (22, 51, 71, 81) are provided.
16. Compressed-gas circuit breaker (10, 30) according to claim 15, wherein a ring (42), preferably made of polytetrafluorethylene (PTFE), is provided to cover the coupling element (22).
17. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to any of claims 1 to 16, wherein means are provided for retention on the coupling element (22, 51, 71, 81), which secure the coupling element (22, 51,71,81).
18. Compressed-gas circuit breaker (10, 30) according to claim 17, wherein a screw, preferably a plastic screw, is screwed into the coupling element (22) to form a clamped connection with the nozzle made of insulating material (24).
19. Compressed-gas circuit breaker (10, 30, 50, 70, 80) according to any of claims 1 to 18, wherein the coupling element (22, 51, 71, 81) has a bore (37) housing a bolt (39) on which the rod (20) is retained.
20. Compressed-gas circuit breaker (10, 30) according to claim 19, wherein a screw, preferably a plastic screw (41), is screwed into the coupling element (22) to secure the bolt (39) in the bore (37).

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