ENDPLATE, LIKE BUILDING POTTING

The invention concerns an endplate, like building potting, for a pressure pipeline, in particular a water-prominent installation line, with into the end of the pressure pipeline threaded a screw pulp and the screw pulp radially outward outstanding and in oh direction extending flange for tightening and/or unscrewing the screw pulp, whereby at the transition of the screw pulp to the flange an enular groove is intended for the admission of a ring seal and the ring seal towers above the end of the thread of the screw pulp which is with the enular groove at least with a part. Endplates of this kind, which are called in the trade building potting, serve for it, a pressure pipeline, in particular in the Heizungsoder sanitary area, before completion the pressure Rohdeitung of basic building part, e.g. by cleaning, tiles etc., pressure tight too worn, and zw. händisch, without having to use a tool. In. the rule takes place afterwards the leak test through castings of the line, whereby for each requirement high pressures, e.g. 16 bar, to arise know. After completion of the building part armatures are attached to the pressure pipelines examined for Diehtheit. In order to ensure sufficient tightness, a soft thick ring seal, which usually is to the rubber, is intended. Hiedurch can become balanced also larger unevenness at the end of the pressure pipeline. The enular groove causes a safe stop of the ring seal also with high pressures. During the leak test air existing in the Dmck piping must be omitted, to which purpose the endplate is loosened to the pressure Rohrleittmg. Hiebei arises the problem that the ring seal remains sticking to the piping end, since air entweiehende over the thread of the plug arrives into the enular groove and forms behind the ring seal an air cushion, which presses the ring seal against the piping end. This requires far unscrewing of the endplate, and zw. so far, until the ring seal is pressed from the enular groove completely. If one tries to seal the pressure pipeline again by Einschranben of the endplate it comes to uncontrollable crimpings the ring seal at the enular groove, so for a long time the pressure pipeline under pressure stands, so that tightness cannot be obtained any longer. Further the danger exists that it can come to an unintentional loosening of the endplate with following uncontrolled withdrawal from water. Further a larger quantity of water always escapes due to the far I-Ierausschraubens of the endplate, since the Zurückschrauben needs some time. The Erf'mdung aims at the avoidance of these disadvantages and difficulties and places themselves the task, a V “rschlußstück to the initially described kind to create, with which an exhaust and a reliable resealing can be accomplished, whereby from the pressure pipeline to entfemende air reliably already escapes after small screwing of the endplate on and a Wasseraustritt can be avoided almost completely. In particular a Wegschleudem of the endplate and an uncontrolled Wasseraustritt are to be prevented. This task is solved according to invention thereby that into the Ringnut_eine passage flows, which intersperses the enular groove limiting wall. The Durchgangsöffnang flows favourably in the range of the ground of the enular groove forming a bearing surface for the ring seal into these, whereby the endplate must be screwed on only around a particularly small angle rotation for the purpose of the ventilation. Hiebei runs appropriately the Durchgungsöffnung by the wall of the flange. Thus the passage lets itself realise particularly simply with the production of the endplate, which is designed as plastic injection moulding part preferably. In accordance with a preferential execution form the passage is conical and from the enular groove outgoing diverging trained, whereby the production simplified and an easy cleaning of the passage is possible when contamination due to mortar etc. Zweckm industrial union extends the thread of the screw pulp into the enular groove inside. The invention is in the following described on the basis the design with a remark example more near, whereby Fig. 1 a profile by an endplate and a Fig. 2 a sketch of this endplate shows. Fig. a detail of the Fig places 3. 1, however with assigned poetry. Fig. 4 shows in to Fig. 3 similar representation the Verschlu tück during escaping from the pressure pipeline to enffemenden air. The endplate (1) points a screw pulp (2) with external thread (3) up, to toward its axle the screw pulps (2) in radial direction outward outstanding conical hollow flange (4) integral unsehließt. This flange (4) points at its free end (of 5) grasp burls (6) up, which easier tightening and/or loosening of the screw pulp (2) at one and/or of one with the screw pulp (2) pressure pipeline which can be locked make possible (7). The end of the pressure pipeline (7) is for this purpose with one to the screw pulp (2) corresponding internal threads (8) provided. At the transition of the screw pulp (2) to the flange (4) is an enular groove (9) planned, which externallaterally of a ring wall (10) is limited. This enular groove (9) serves as the admission of a flexible flat ring seal (U). The ring wall (10) is interspersed by a conical recess (12), those from the enular groove (9) outgoing diverged. It flows close of the ground (13) to the enular groove (9) into these; with the represented Ausfüttmngsbeispiel is the ground (13) of the enular groove (9) approximately at height of the center of the 4 E? RK 392,147 B conical recess (12). The thread (3) of the screw pulp it extends to for instance to the ground (13) of the enular groove (9), whereby a reliable sealing of the Dmck piping (7) is led and from the pressure pipeline (7) air which can be removed is ensured after loosening the endplate directly to the ground (13) of the enular groove (9). The function of the Verscldußstückes is the following: First the endplate (1) becomes screwed onto the pressure pipeline (7) so far that it comes to crimpings the flat ring seal. After negative pressure setting of the pressure pipeline the Verschlußstüek (1) becomes loosened, so that inside the pressure Rohfleitung (7) still existing air to escape can, and zw. are enough in such a way, until it comes to a Wasseraustritt. Needs according to invention hiezu only slight screwing on of the endplate (1) to take place, for example around a half to one and a half revolutions. It must the screw pulp (2) to be so far zurüekgesehraubt, until the Flaeh ring seal (U) is relaxed. Along the thread from the pressure pipeline (7) escaping air then the FlachRingdichtnng (11) presses upward, whereby between the ground (13) and the enular groove (9) and the ground (13) opposite surface of the flat ring seal a gap (14) (see Fig. 4) in an educated manner, by air at the passage (12) arrived. Air can escape by the passage (12). As soon as by the close passage (12) water withdraws, the VerschlnBstück (1) becomes again tightened. The Wasseraustritt is minimum, there the passage (12) only a small diameter exhibits. The danger of the complete loosening of the endplate (1) with under pressure of standing pressure pipeline (7) loosening of the endplate (1) only around a relatively small angle rotation is not given, there is necessary. The invention can be varied in different regard. For example the passage (12) can directly into the ground (13) of the enular groove (9) of the Versehlußstüekes to flow, as the passage is arranged diagonally or in such a way it is arranged that it into the interior of the hollow Ansatzstüekes (4) is enough.