DE7913985U1 - GAS PIPE, IN PARTICULAR HOUSE ENTRY - Google Patents

Description

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Attorney's file; G 44; 5 Franz Schuck,

Password: "Vent safety device" 792 Heidenheim

Gas pipeline, especially building entry

The invention relates to a gas pipe, in particular a connection piece for the pipe system located in a house (so-called house entry), with a nit thread provided sealing plug, which is on the end portion of the Line can be screwed on.

Such building entries are subject to special safety regulations in every respect. In the event of improper handling, there are numerous possibilities of accidents ( ¹ HbCpIosionen), which can lead to personal injury and property damage.

' Often the problem arises that the mentioned screw plug of the house entry has to be unscrewed and then screwed on again. This can e.g. B. then be necessary _r if you want to check whether the line is under pressure, and if so under what pressure. It can e.g. B. be necessary to measure the pressure using a manometer. This then works as follows: First the sealing plug is unscrewed, then the manometer is screwed in and the pressure is read off, then the manometer is unscrewed again and the sealing plug is screwed in again.

Is the line under pressure, which is generally the case with the Pail
the operations of replacing the plug and manometer must be carried out quickly. So it is
z. B. largest after unscrewing the plug
It was imperative to screw in the pressure gauge in a hurry. The same goes for
for the final screwing in of the plug after f the manometer has been unscrewed. f

The fitter performing these operations does not have to |

just hurry (to prevent an inadmissibly large amount of gas from escaping and f |

thus avoiding the risk of explosion). He has to- h

more also go to work very skilfully, as it is well known |

it is not easy to find an object such as a plug |

or a pressure gauge against the pressure I in the line

screw in. Most of the time, it does not succeed in loading |

corresponding part to be screwed into the first thread |

insert gears so that no tilting occurs. f

The invention is based on the object of providing a gas line, ins- %

special a house introduction of the genus mentioned at the beginning "'

designed in such a way that the problems identified here

be avoided. The arrangement should therefore be such; be hit, I.

that screwing in a pressure gauge and / or re-inserting.

remove the plug faster and with greater *

Security than before. |

According to the invention, this object is achieved in that in i

End section of the line and / or in the plug | Channel is provided, which is designed and arranged | is% that when the plug is only partially screwed on (or another body to be used instead of the plug, for example a manometer) the line is vented.

This achieves the following in detail: When the line
is under pressure, which is generally the case, escapes after loosening the plug or manometer

gas when the screwed-in part in question is only loosened by a few threads. When inserting this part So the absolute tightness will only be established when the part to be screwed in is completely screwed in. At least the arrangement should be such that at the beginning of the screwing, i.e. during the engagement of the first thread turns, medium in the line and under pressure can still escape. this has the consequence that the pressure in the outermost area of the named connecting piece is reduced to a certain extent, in which the plug or the manometer or a | other part already attached to the connection piece and j has even been screwed in by a few threads. The |

It is therefore easier for the fitter to screw in, as he does not have to work against full pressure. This full pressure namely only builds up in the course of further screwing in.

The parts in question, that is to say the end section of the pressure port and / or sealing plug, can be designed in various ways according to the invention. So it is possible to drill the said channel (in this case it is circular in cross-section) or to mill (in this case it will generally have a rectangular cross-section). It may be provided with a chamfer and the end portion of the conduit f having a closure, plug cooperates appropriately provided channel. Furthermore, the sealing plug can also have, over part of its length, an open-edged recess extending up to the inner end of the sealing plug. After all, it is basically irrelevant whether the plug is attached to the connection piece of the house entry by means of an internal or external thread. In general, there will also be a seal between the connection piece and the stopper.

Should the pressure in the line be measured by a manometer in the above Wise checked, the invention offers a particularly elegant way to do this: the stopper it only needs to be unscrewed so far that the gas can escape to a (small) extent. Is the ver

end plug provided with an external thread and is inserted into an internal thread of the connecting piece, and is the Connection stub also with an additional external thread provided, onto which the manometer can be screwed, the sealing plug no longer needs at all to be taken out. He only needs a few threads to be dissolved so that some gas can escape. Then the manometer is on the external thread of the connecting piece unscrewed. In general, you then only need to wait a few seconds until the pressure in the connection piece is increased fully built up. This pressure is then read on the manometer, the manometer removed again, and O the plug screwed completely back into the connecting piece.

The invention is explained in more detail with reference to the drawing, and in 6 figures, which are to be briefly dealt with below:

Fig. 1 shows a connection piece 1 into which a plug 2 is screwed.

Fig. 2 shows a sealing plug designed according to the invention; this has a milled slot that protrudes from the

Front side of the stopper over part of the ■ i
/ ■ λ threads extends.

In Fig. 3 you can see a plug 2 'which is in the connecting piece 1 is only screwed in (or screwed out) so far that a certain amount of ventilation can take place can. Here the above-mentioned channel consists practically only of a chamfer of the connecting piece 1; a vent can take place via the threads of the plug 2 '. This sealing plug 2 'thus has no special channel (slot or hole).

In the embodiment shown in Fig. 4, a sealing plug 2 according to Fig. 2 is again used, and also a Connection piece 1 according to Fig. 3 with a chamfer.

The embodiment shown in Fig. 5 has a chamfered connection piece 1 and a plug 2 ^l , which has a vent hole.

Finally, one recognizes in Fig. Β a connection plug 1, the is equipped with an internal thread for a sealing plug and an external thread for a pressure gauge,

Claims (5)

PROTECTION CLAIMS § 1. Gas pipe., In particular connection stubs for the in one House located pipe system (so-called house entry), with a threaded plug, which can be screwed onto the end section of the line, characterized in that in the end section of the line and / or a channel is provided in the plug, which is only partially between the inside of the line and the environment The screwed-on plug causes the line to vent. 2. Line according to claim I, characterized in that the channel is a bore with a circular cross-section. 3. Line according to claim 1, characterized in that the channel is a slot with a rectangular cross section. 4. Line according to one of claims 1 to 3, characterized in that that the closure with the channel, and the end section of the line with a cooperating with the channel Chamfer are provided. 5. Cable according to any one of claims 1 to K, thereby characterized marked \ that the closure on a part of its length has an open-edged recess extending to the inner end of the closure.