FIELD MEASURING ROD, IN PARTICULAR FOR HOCHSPANNUNGSFREILEITUNGEN

The invention goes out from one field measuring rod, in particular for Hoehspannungsfreßleitungen, consisting of two essentially equal trained spacer arms ending at their two ends into halfcylinder-dish-shaped clamping bowls also in the clamping bowls to at least partly fastened and of a semiconducting flexible plastic consisting Zwisehenlagen between the clamping bowls and each conductor cable, furthermore with the two spacerarm-connecting hinge sewie with captive, the closed spacer arms according to clamping means holding together from spacer distance pieces under a pre-determined pre-loading. A such measuring rod is from the US-PS Nr.3, 924.055 is admitting and shows a pair same spacer arms, whose everyone at both ends in ever a Halbseha] e ends each other. In i0 the half shells spans from flexible, halbIeitendem plastic are fastened, which serve in each case for holding one of the conductor cables. The two spacer arms are pliers-like articulated connected in a hinge lain between the Halbsehalen and the perpendicular transverse centre plane by the measuring rod. About symmetrically to this hinge closing retaining means is arranged the two spacer arms, which as captive screw trained its t5 can do. The pre-loading applyable by the retaining means is through in its proximity planned projections/leads hegrenzbar. it would be desirable that the two conductor cables of the rope bundle are seized for instance with the same pre-loading and that precautions against unavoidable Ermüdungsbzw. Signs of aging of the flexible Haltemlttel are met. Furthermore from the DE-AS 2232587 a measuring rod is well-known for bundle leaders of overhead lines, with whom the individual bundle leaders are covered by clamping arms, which are stored at a common carrier swivelingmobile, which perpendicularly to the Sehwenkachsen of the KIemmarme is divided, whereby the clamping arms are on the other hand flexible, the deformation energy absorbing elements intended between parts of the carrier to intervene and in the range of the articulated bearing places between the carrier parts on the one hand and the clamping arms, which the clamping arms in a neutral situation to hold seeks. Hiebei form the Prefilkanten of the two bowl halves of the carrier within the range of the Sehwenklagerstellen recesses, divided in the centre plane, for the interference of the clamping arms, which are appropriate im übrigen range together. With this measuring rod the flexible elements bus semiconducting elastomer material can exist. This versatile measuring rod is relatively expensive; also the danger exists that when assembling individual parts fall down to the ground, which leads to unwholesomeness. Furthermore by the DE-PS Nr.I077278 and/or by the GB-PS Nr.811, 038 corresponding with it a field measuring rod is well-known, which consists of in its horizontally staff divisible between both conductor cables the gedaehten symmetry plane at least in proximity of the conductor cables also at both standing attached clamping bowls. Between the half shells of the clamping bowls and the respective conductor cable a lengthwise-divided socket from a rubber-similar flexible insulant, held by form closure, is interposed in each case, which enclose the rope under pressure after latches of the owner by pushing in schwalbenschwanzförmigen bolts into each other facing schwalbenschwanzförmige slots. For the Lagesieherung of the two halves of the owner serve pins, which rise up into appropriate drillings in the counterpart. The well-known measuring rod appears capable of improvement in different regard: During the attachment of the owner between the conductor cables, taking place in large heights, is the multiplicity of loose individual parts disturbing, which must be joined frequently in unfavorable weather. Furthermore in the long term the spanning of the leader between the Klemmsehalen diminishes with aging the flexible insulant too strongly. So that the bolts can be inserted when assembling, a previous Zuseinmenpressen of the two halves is necessary by means of clamping means which can be reproached as installation tool. Is also a field measuring rod admits (DE-AS 1285032), whose is captive connected individual components with the owner. Hiezu are at the ends of the actual rigid spacer part in each case two cheeks connected by hinges, a Sehließvorrichtung, a clamp and in a recess of the clamp a lying, divisible Buehse from a flexible material, enclosing the leader, intended. But also here obviously the clamping effect of the Sehließvorrichtung, in particular on longer time, is not sufficient. It is expressly mentioned that for closing the clamps a fastening clamp is essential od.dgl. A better blocking of the conductor cable should be possible by a measuring rod become known by the DE-PS Nr.1886340, which ends from one in two retaining brackets discharge firm measuring rod, furthermore of two short loose retaining brackets consists, which are with the first mentioned brackets in each case a conductor cable over an interposed rubber bush, this comprehensive, boltable. Also with this owner disturbs the multiplicity at individual parts, which can come into loss. s also does not carry the kind of blocking the rope for unavoidable aging of the rubber bushes calculation. Are completely general at field measuring rods, which are used between bundle express leaders for maintaining an even distance that single rope, to place different requirements: First these field measuring rods must hold the rope under all operating conditions zuverI0 leave on the desired distance, i.e. in normal operation and with rope oscillations generally as well as for example in the case of short-circuit at least within the measuring rod range. The field measuring rods must represent from there a stable support between the rope tie points, whereby the support for the prospective current of a circuit, which can occur in the leader, must be computed. The storage of the rope in the Klemmstellen may not be under any circumstances rigid. The rope movements are to be obstructed rather as few ones as possible. The ropes is the freedom of movement toward the support axle to only be taken; also the owner may not walk in longitudinal direction of the rope. Finally the field measuring rods must be also on the line potential, in order to avoid unpleasant electrical side effects. Therefore it is task of the invention, the well-known field measuring rods, in particular toward an unproblematic assembly to develop a compensation further aging the flexible spans as well as considering more favorable manufacturing possibilities. The solution is given the initially described kind with a field measuring rod thereby that dic according to per a slot as well as a joint as opening cylindric flexible spans at one of the two ends of the spacer arms in the installation-ready condition of the field measuring rod forming a only one connected assembly unit as the two loose spacer arms only connected articulated hinge it is trained and that the two spacer arms under formation of a gap are connected by one pair each in proximity of the clamping bowls convenient clamping means and that to the avoidance of the consequences of aging and/or. Fatiguing the flexible material of the spans in the proximity of the perpendicular transverse centre plane and too these symmetrically spacer distance pieces and in the proximity of the Klemmscha] EN with the clamping means further spacer distance pieces as well as a further gap in the center of the measuring rod it is so intended that with attractive clamping means the column in the proximity of the clamping bowls around given a measure are noticeably smaller than the gap in the center of the measuring rod. Hiedurch will except the general solution of the task a row more particularly distribute to receive. The field measuring rod is here designed as a two-piece support, both parts are essentially identical whose. The spans, which keep the rope flexible, lying between the conductor cable and the half shells of the owner, are from a flexible however semiconducting material, like e.g. neoprene, manufactured. Thus the owner is on the line potential. The dimensions of the spans are in such a manner both with the supports and with the rope diameters co-ordinated that installation periods are picturable. It is possible to get along with a small number of different field measuring rod types. The adaptation to the different diameters of the conductor cables takes place only via choice Dimensionender flexible spans. The main advantage consists however of it that the line farmer working in large height over the ground must take a only one coherent Montageeinhslt into the hand, with that the necessary spans as well as Klemmittel u.dgl, is captive connected. Hieran has the double utilization of the flexible spans a substantial portion: On the one hand these flexible spans of their original task are sufficient as flexible link between the metallic owner and the conductor cable; “on the other hand however the indulgence of the spans is used in order to form with their assistance a hinge. This Scharso rivet made possible not only covering the respective conductor cable separate it made possible also • a bill-like opening of the two owner halves. Since in addition the necessary clamping means are connected with the respective owner half captive, the line farmer cannot be lost to most unfavorable climatic conditions a part also with work under, or fall down from large height to the earth. The line farmer must thus for its work on the overhead line only the necessary number of measuring rods as well as only one tool for tightening the Spannmlttel, appropriately a torque wrench, be given. Subsequently, a remark example of the invention article under indication of further more obtained distribute described on the basis the partially schematic designs; to these point: ùFig.1 the field measuring rod in for the installation of opened position, perspectively represented, Fig.2 a preferential arrangement of the invention article in accordance with Fig.1 in side view, partly gesohnitten, Fig.3 the field measuring rod in accordance with Fig.2 in plan view, Fig.4 a cross section by the two owner halves with another training of the clamping means and Fig.5 a plan view on the portion in accordance with Fig.4. Fig.1 shows clearly, there the field measuring rod --l-- a only one connected assembly unit forms, at which all needed parts for the assembly are captive fastened. The field measuring rod essentially consists of spacer means --2--, those with retaining means --3-- are einstückig formed out. Between at the ends of the spacer arms --8, 9-- Klemmt5 present flat --37, 38 and 39, 40-- as well as the conductor cables not represented in this figure --4-- in each case a flexible span lies --5, 15--. The assembly friendliness of the field measuring rod surprising for the professional world is based, apart from the captiveness of the clamping means --6--, on the multiplex operation of the flexible spans --5 and 15--, those except their function as the conductor cables --4-- between the clamping bowls --37 to 40-- carefully and nevertheless unverrückbar haltcnde retaining means --3-- beyond that the two spacer arms --8, 9-- interconnect articulated to a opening by hinges unit. The assembly the field measuring rod becomes --i-- approximately toward the arrow --7-- transverse to the Lelterseilen --4-- it shifted in such a manner that the spacer arm --9-- below, the spacer arm --8-- but remains above the rope bundle. The opening angle between the two halves is so large that the rope easily between the muzzle-like opened half shells, thought on the right illustrated page --16 and 17-- the span --5-- slides. By something similar open the half shells --13 and 14-- the span --15-- arrived also the second rope into its intended situation. Around the hinge-like movement of the two halves of the spans --5, 15-- to facilitate, the Zwischcnlagen points in the range of the hinges --11 and/or 12-- a somewhat smaller cross section up. Since the flexible spans are still according to invention from electrically semiconducting Neepren, for example by approximately 60 shores, manufactured beyond that, the spans of the third task are sufficient to adjust arising potential differences within the owner range. Around the ease of installation sake in the context of the invention the lying possibility is, the two spacer arms --8 and 9-- to arrange completely directly, not represented. Hiezu must only one of the complete clamping means --6-- opposite like being drawn arranged. During the drawn execution the key to tightening both clamping means lets itself --6-- set from more eber ago, which the practical man under the less favourable conditions in the assembly place feels as pleasant. Likewise in the framework it, the clamping means is appropriate for the invention --6-- in place of the drawn Sechskantkopfes --21-- with a toggle od.dgl to provide for tightening the clamping means. Will itself hiedurch would ride along an appropriate wrench to put aside. All such beginnings at the clamping means would favour however among other things a taking effect of the corona effect, to whose avoidance with the Erfindungsgcgenstand embarrassingly one paid attention. There furthermore in the clamping means --6-- a relatively high pre-loading to be applied is, appeared the application of a hexagonal wrench, preferably a torque wrench, as only necessary assembly tool the appropriate solution. If another loose assembly tool is to be used, can in place of a Sechskantkopfes --21-- for example also a round head with a cross hole step, by which for stretching a thorn is then put. A preferential remark example is represented in the Fig.2 and 3. Therefore the two spacer arms formed out in the die point --8 and 9-- both in their and spacer means --2-- for serving center piece and in with the center piece the forming, as retaining means, a unit --3-- serving clamping bowls --37, 38, 39, 40-- in each case the same flat rectangular cross section up. All edges are naturally broken to VE to avoiding the corona effect. The flat rectangle transverse son CCIT of the spacer arms --8 and 9-- is to that extent for the invention article substantial, as thereby the range between the retaining means --3--, thus in particular the range of the spacer means --2-- by tightening the clamping means --ö-- - as to be described it will still have - so far flexibly be deformed can that aging the spans --5 and 15-- no influence on firm holding of the conductor cables --4-- has. In pairs in each case each other the zugeordueten clamping bowls is one span each --5 and/or 15-- from an elastically flexible, semiconducting material, for example Neolo pren with a shore number of approximately 60. Each of the two Zwisohenlagen has the form of a cylindrical body, however with the difference in the closed condition in first approach that constantly a slot --10-- open-remained. Only by this slot constantly the indulgence of the span remains, insbesendere when strutting, if one also--41--marked positive connection a shift of the spans in longitudinal direction of the conductor cable --4--prevented or auGh for exclusive fastening of the spans in the clamping bowls serves. In order to improve the hinge effect of the spans, their wall thickness is diametric the slot --10-- opposite by a wedge-shaped it would weakened call whereby joints --11 ', 12 '-- are formed. By the slot --i0-- as well as the joint --12 '-- are the half shells --16, 17-- the span --5-- and by the slot --10-- as well as the joint --11 '-- the half shells --13, 14-- the span --15-- determined. Furthermore for the invention article, as already suggested, the fixed connections between half shell are substantial --13-- and clamping bowl --37--, Half shell --14-- and clamping bowl --38-- as well as half shell --16-- and clamping bowl --40--. However exists between half shell --17-- and clamping bowl --39-- no indissoluble connection. Of course the indissoluble connection could be planned also between the latter group of pairs, if for it between another group of pairs a solvable connection remains. After the drawn example the fixed connection takes place via countersunk rivets --35 and/or 36--, the drillings in the clamping bowls, not specified in more detail --37, 38 and 40-- intersperse. Apart from the positive connection already mentioned also adhäsive means, like a sticking, are alternative vulcanization od.dgl. for the connection of the half shells with the clamping bowls. planned. The adhäsiven means are applied however only to an in such a manner limited extent range that the free ductility of the flexible material is limited only in acceptable measure. Furthermore the Fig.2 and 3 show a preferential arrangement of the clamping means --6--. Here a thin shank end screw intersperses --20-- with hexagonal Kepf --21-- the two spacer arms --8 and 9--. As usual also a disk can --22-- interposed its. In the installed condition is the thread --23-- the screw --20-- into the Gegengewinde holding --25-- the spacer arm --9-- screwed in. Against loss of the screw --20-- before effected assembly is in the spacer arm --8-- a securing auxiliary thread --26--, which can be very short. Thus now an not intended mutual spanning of the spacer arms --8 and 9-- while possibly-soft assembly intermediate stage is impossible, is between the auxiliary thread --26-- and to the spacer arm --9-- convenient surface of the spacer arm --8-- in this still another lowering --27--, which is so deep that her the thread --23-- before the assembly completely to take up can. In order to achieve this goal completely, the thin shank end screw points --20-- a Hinterschnei4s dung --24-- appropriate length up. Around the length of these Hinterschneidung is the screw --20-- before screwing in into the Gegengewinde holding --25-- freely mobile. Between the captive clamping means --6-- and the perpendicular transverse centre plane --19weisen both spacer arms --8, 9-- Spacer pieces --18-- up. As soon as both spacer arms are closed, by which clamping means however still no pre-loading was applied, remain according to these spacer pieces --18-- between the two spacer arms in proximity of the clamping bowls --37 to 40-- a gap --28-- and in proximity of the perpendicular transverse centre plane --19-- a gap --29--. In the not linked up condition of the field measuring rod is the column --28 and 29-- equally large. It is now substantial for the invention article that by means of the captive clamping means --6-- a such pre-loading to be applied can that in the completely assembled condition of the field measuring rod the gap --28--is noticeably smaller than the gap --29--, that itself due to the flexible deformation of the spacer means --2--, which exhibits as mentioned a flat rechteckförmigen cross section, increased. It is reached by this measure that itself in the course of the time inevitable fatigue symptoms in the spans --5, 15-- not post teilig on blocking the conductor cables --4-- between the spans --5, 15-- affect. In all other respects the pre-loading is by the clamping means --6-- so strongly that slots --10-- between the half shells --13 and 14 and/or 16 and 17-- , but the slots remain --43-- with the clamping means --6-- completely close. So that the desired pre-loading with security is applied, spacer pieces surround --44-- concentrically the clamping means --6--. The height of the spacer pieces --44-- in relation to each other neighbouring surfaces of the spacer means --2-- is smaller than the height of the spacer pieces --18--. Over without overstressing of the clamping means --6-- an optimal pre-loading to reach, knows - alternatively - application of a torque key to tightening the clamping means --6-- appropriately its. The several times mentioned pre-loading has the dual function, on the one hand as loosening protection for the clamping means --6-- to serve and on the other hand inevitable aging of the flexible spans --5 and/or 15-- to compensate. Both the clamping means are of course --6-- with the associated Abstandstüeken --44-- and the spacer pieces --18-- symmetrically to the perpendicular transverse centre plane --19-- more angeordner. When particularly appropriately has it proven, if the mutual distances of the clamping means for instance 0,75mal and the spacer pieces of about 0, Smal the distance of the conductor cables --4-- amounted to. It concerns here however expressly somewhat variable measures. Out of Fig.2 it can be taken that the spacer pieces --18 and 44 non-cutting together with the spacer arms --8, 9-- are formed out. Equivalently every other spacer piece would be natural, if it only the column --28, 29 and/or 43-- in the not strutted condition of the field measuring rod ensures. It is also possible, only at one of the two spacer arms --8 or 9-- Spacer pieces --18 and 44--, then however of double height to attach. In the Fig.4 and 5 finally is another arrangement of the captive clamping means --6-- drawn. Therefore intersperses with a head --31-- provided pin --30-- ever a drilling in both Ahstandsarmen --8 and 9--. Stretching takes place also here through tricks of the pin, whereby a sliding part angehrachter transverse to the longitudinal axis of the pin --32-- on cylindrical wedge surfaces --IT-- slides. The training of the equal part represented here --32-- as the pin --30-- crosswise interspersing pin has the advantage that when the workshop-moderate assembling first the pin by a drilling in the one of the two spacer arms --8 or S-- put and afterwards through driving the pin mentioned the clamping means --6-- becomes captive. The final assembly the pin - natural by means of the pin - becomes by a slot --42-- into second of the spacer arms --9 or 8-- pushed. As protection after strutting over the wedge surface --33-- the pin rests into a rest --34-- .