DE3611847A1 - METHOD AND DEVICE FOR PRODUCING LIGHTWAVE CONDUCTORS WITH GLASS TUBE INTERNAL COATING - Google Patents

Description

Description

Method and device for the production of optical waveguide preforms with glass tube inner coating

The present invention is concerned with Problem that in the process step of Lightwave conductor preform manufacture where the Inner surface of a glass tube glass is deposited from a chemical vapor phase reaction, also in the one with the Substrate pipe connected exhaust pipe glass particles are present, which tend to be inside the exhaust pipe to accumulate and must therefore be removed from this exhaust pipe.

In this process step the

Inner glass tube coating, is a gaseous medium the certain glass-forming starting materials, in particular Halides or other compounds of glasbi idends or contains glass doping elements, e.g. B. silicon, boron, Germanium, phosphorus or the like, together with an oxidizing agent, for example oxygen, through the Interior of a substrate roh res passed through, wherein the Substrate tube usually rotated around its longitudinal axis and

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is heated from the outside. The heating is done z. B. by means of an oxygen-hydrogen flame directed at the Outer surface of the substrate tube is directed so that in the heated area and / or downstream thereof Area chemical reactions take place in which the gLasbi Idenden starting materials in G Lasmateria Lien converted and deposited in the form of at least one layer on the inner surface of the substrate raw will.

During this phase, a "glass soot", consisting of very small G loads fiefs, in the heated area or formed downstream of this and then by the through the gaseous medium flowing through the substrate tube the downstream end of the substrate tube (10) and blown into a so-called exhaust pipe. This exhaust pipe is a glass pipe with an enlarged diameter compared to the substrate pipe and is on a Transition area to the downstream end of the Substrate raw res melted so that it is attached to the Rotational movement of the substrate takes part.

Experience has shown that the GLaspartikeL that Reach the inside of the exhaust pipe, tend to separate out in this exhaust pipe and collect particles there images that show the flow cross-section of the exhaust pipe to decrease. Such collections could then also be the Influence the quality of the process of deposition of the chemical vapor phase reaction and ultimately also the properties of those deposited in the substrate tube Layer or layers by changing the deposition parameters, z. B. the pressure, the flow rate of the gaseous medium or the like can be changed compared to the originally set values.

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To solve this problem by removing the GLaspartike I from the Exhaust pipe before the particulate build-up has any cause significant changes in the separation parameters being able to avoid is becoming very common these days The following procedures are used: The operator of the lathe on which the preform is made scratches in the inside of the exhaust pipe at regular intervals and uses a quartz rod about 1 meter long to get all the way into the exhaust pipe. if Once the particles have been detached, they are removed from the exhaust pipe with the same quartz rod, for which purpose the Quartz rod is moved back and forth several times. It has been found that this technique of removing Glass particles suffer from several disadvantages. One These disadvantages are that frequent operator interventions in an otherwise automatic ongoing process are required. Furthermore there is the disadvantage that considerable contamination of the just made preform can arise as a part the detached glass particles into the interior of the Substrate tube back and the layer created there into it can achieve.

A method and an associated device for the internal coating of a glass tube in connection with the Production of an optical waveguide preform in which a Exhaust pipe is present, is known from DE-OS 29 07 731. In this exhaust pipe there protrudes a pipe into it, through the one in the opposite direction to the direction of flow of the gases for the chemical vapor phase reaction Auxiliary gas to increase the pressure prevailing in the chemical vapor phase reaction in the exhaust pipe is initiated.

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It is the object of the invention to provide a method of Specify the type mentioned at the beginning, which the above does not have the disadvantages described and that itself can be carried out completely automatically. It is also intended to provide an arrangement for carrying out the method that is simple in construction, relatively inexpensive to manufacture, easy to install and use and still works reliably.

The inventive method is the subject of Claims 1 to 6, the device for implementation of the method is the subject of claims 7 to 13.

A particular advantage of the device according to the invention is that they are excellent for a fully automated removal of the glass particles the exhaust pipe, with no manual intervention by the operator is necessary. Since the Accumulation of particles in the exhaust pipe, if any, downstream (in the direction of the chemical Vapor phase reaction introduced gases) from the area, at which the two gaseous media meet with each other mixing takes place, there is obviously none Possibility of such particles getting back into the interior of the substrate tube and the particles formed there Could contaminate the layer. An additional advantage of the invention is that it is possible to print in the substrate tube not only during the internal coating from the chemical vapor phase reaction, but also also to regulate to the required extent during other steps of the production of lightwave conductor preforms.

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The invention will now be based on the single drawing for example explained in more detail. The drawing shows: The part of the device for the production of Optical fiber preforms. After this Internal glass tube coating process.

The reference numeral 10 denotes a substrate tube, whose closer surface of at least one layer of at least one optical glass material coated and / or im History of the manufacture of an optical fiber preform should be further processed. With such a Production, the substrate tube 10 is known to be stored in a lathe, and is by the lathe around his Rotated longitudinal axis, at least while the layer is generated on its inner surface. This layer will generated in the course of a deposition from a chemical vapor phase reaction in which the to be deposited Optical material from a gaseous or vaporous starting material L, which is in a stream of a primary gaseous medium contained by the interior of the substrate roh res, converted into a solid material in which the starting material is heated, in particular by a on the outer wall of the substrate roh res directed flame, the heat penetrates through the substrate tube and the primary gas medium heated. This process is well known and therefore needs no further explanation. While this deposition from the chemical vapor phase reaction so-called "glass soot" is formed, which consists of very small Parts of the solid glass material, e.g. B. Oxides of silicon, Germanium, phosphorus or boron. These particles are entrained in the flow of the primary gas medium

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through the interior of the substrate tube 10 and arrive at the downstream end, from where they enter a Exceed exhaust pipe 11. This is connected to the downstream end of the substrate tube 10 and forms an extension of this substrate roh res 10 of enlarged diameter, extending in the downstream direction via the downstream end of the substrate tube 10 extends beyond. The glass particles would, if they were gradually collected in the interior of the exhaust pipe 11 could possibly influence the flow of the primary gas medium through the interior of the substrate tube 10. That's why it is desired to remove such particles from the interior of the exhaust pipe 11 before any significant Accumulation of the glass particles in the interior of the exhaust pipe takes place.

According to the present invention, this removal of the glass particles takes place with the aid of a total of the device denoted by reference numeral 12. These Device 12 contains, as one of its main components, a tube 13 through which an additional medium, in particular an inert GA such. B. nitrogen, in the Interior of the exhaust pipe 11 and is introduced up to an area 14 at which the exhaust pipe into the substrate pipe and which essentially chronically opens in the downstream direction (of the primary gas medium). Thus, the additional flows in this transition area 14 Gas medium, also called auxiliary gas, in the opposite direction to primary gas medium that emerges from the interior of the substrate tube 10 into the transition region 14. This results in an extremely turbulent or irregular flow pattern at the transition region 14 and downstream (in the direction of flow of the primary

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Gas medium) from this transition area. This will be any glass particles that have already separated or which tend to deposit, in the transition area 14 or swirled downstream of this. This effect is decidedly based on the fact that, as in the Drawing shown, the longitudinal axis of the pipe 13 used to guide the auxiliary gas, in the following Called auxiliary gas pipe, transverse to the The longitudinal axis of the exhaust pipe 11 is offset so that the Flow of the auxiliary gas as it emerges from the auxiliary gas pipe

13 on the essentially chronic inner surface of the transition region 14 is directed to the from the Auxiliary gas pipe 13 deflects escaped auxiliary gas flow, before mixing with the flow of the primary gas medium which is substantially coaxial with the transition region

14 from the interior of the substrate tube 10 into the Transition area 14 crosses. Despite the transversal Offset of the longitudinal axis of the auxiliary gas pipe 13 opposite of the longitudinal axis of the exhaust pipe 11, the longitudinal axis of the auxiliary gas pipe 13 is essentially parallel to that of the Exhaust pipe 11, which in turn essentially coincides with the longitudinal axis of the substrate roh res 10.

The effect of swirling or particle removal will be enlarged still further by the fact that the auxiliary gas pipe 13 is on the current ground sub-area Inner surface of the exhaust pipe 11 is supported or in contact with this or with any Glass particles that may be there in contact is.

This means that the glass particles that are at this zone are present, insofar as they are loose or as a result of the

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Contact with the outer surface of the auxiliary gas pipe 13 Can be loosened in the mixed flow of the primary and the additional gas passing through the inside of the exhaust pipe 11 and on the outer surface of the auxiliary gas pipe 13 flows past, reach and be carried along with this auxiliary current.

Experience has shown that because of the rather violent nature of the flow in the transition area 14 and downstream of this transition area, the glass particles are normally not located in the interior of the Exhaust pipe 11 settle before they have reached an area that is a considerable distance downstream (in the direction of the primary gas flow) from the transition region 14 and usually in the gap lies between the inner wall of the exhaust pipe 11 and the outer wall of the auxiliary gas pipe 13. In this area however, the glass particles have a tendency to stick to one another and / or to the inner surface of the exhaust pipe 11 and / or to the outer surface of the auxiliary gas pipe 13 to cling to. To counteract this tendency, and for the Dissolve glass particles so that they are removed from the mixed flow of gaseous media that passes through the space between the exhaust pipe 11 and the auxiliary gas pipe 13 flows, are carried along and so from the interior of the exhaust pipe 11 are removed, the auxiliary gas pipe 13 acts as a Scratches for the inner surface of the exhaust pipe 11. For this purpose it is provided that the outer surface of the auxiliary gas pipe 13 a relative movement in the circumferential direction based on the inner surface of the Exhaust pipe executes.

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As shown in the drawing, this is preferred achieved in that the auxiliary gas pipe 13 is mounted is that it is rotatable about its longitudinal axis and that this tube at least during the Preform manufacturing step of the deposition from the chemical vapor phase reaction rotates. Preferably one lets this auxiliary gas pipe 13 in one direction of rotation rotate, which is opposite to the direction of rotation in which Substrate pipe 10 and the exhaust pipe 11 connected to it rotate, so that the two surfaces lying against one another at the current floor area in relation to one another move past opposite directions. This has the advantage that a relatively high Relative speed between these cooperating Circumferential surfaces and, as a result, high efficiency Particle detachment is achieved by scratching, too when the exhaust pipe 11 and the auxiliary gas pipe 13 with relatively low or moderate Rotate rotation speeds. Another by it The advantage achieved is that the inner surface of the exhaust pipe 11 has a scratchy effect on the outer Surface of the auxiliary gas pipe 13 exerts, and this for same time as the outer surface of the auxiliary gas pipe 13 exerts its scratchy effect on the inner surface of the exhaust pipe 11, so that accumulated glass particles not only from the inner surface of the exhaust pipe 11, but also from the outer surface of the Hi Ifsgas pipe 13 must be removed.

This rotational movement of the Hi Ifsgas pipe 13 causes a Motor 15, which is preferably a variable speed motor with a rated power not exceeding 746 watts

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a speed of 1000 per minute. The engine 15 has an output shaft Le 16 on which a first pulley is attached. An endless transmission element 18, the is shown as a toothed belt, connects the first pulley with a second pulley 19, which on a connecting pipe 20 is attached so that it rotates together with this. The connecting pipe 20 has a support part 21 which is in an internal channel 22 a stationary gas and connection piece gas connection is rotatably mounted and is sealed in the internal channel 22 by an arrangement of sealing rings 24. A other part 25 of the connecting pipe 20 is via a sealing connection in the form of a flexible plastic coupling piece 26 of known design with the End of the auxiliary gas pipe 13 connected by the Transition area 14 is turned away. That way will a rotation of the output shaft 16 of the motor 15 into the rotation of the connecting tube 20 and over Plastic coupling piece 26 in a rotation of the Auxiliary gas pipe 13 implemented.

The internal channel 22 of the gas connector 23 ends with its end facing away from the holder part 21, in a first opening 27. A plug 28 tightly seals this opening 27 and allows only one line 29 to pass through Measure the deposition pressure through it. This line leads from a measuring range at the downstream (based on the flow of the primary gas medium) located end of the Auxiliary gas pipe 13 is located as shown through Auxiliary gas pipe 13 therethrough to a manometer 30, which the measures the pressure prevailing in the measuring range. This pressure indicates the operating conditions that will exist at least during the Preform manufacturing step of the deposition from the

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chemical vapor phase reaction prevail. Another Opening 31 extends into the internal channel 22 essentially transversely to this channel and between the mounting part 21 and the first opening 27. The Opening 31 is again tightly closed by a second plug 32, with a tube 33 passing through the plug 32 passes through. This pipe 33 is used to initiate the Auxiliary gas into the internal channel 22, from where it is then continues to flow through the interior of the connecting pipe 20, the interior of the connector 26 and the interior of the auxiliary gas pipe 13 in the direction of the transition region 14.

It has proven to be advantageous that the Auxiliary gas tube 13 is a tube made of quartz glass and one Has an outside diameter of about 25 mm and that the auxiliary gas pipe 13 extends so far into the interior of the exhaust pipe 11 is introduced that its free end approximately 5 cm downstream (in the direction of flow of the primary Gas medium) remains from the point at which the substrate pipe 10 merges into the exhaust pipe 11. The tube 29 for measurement of the deposition pressure is preferably made of stainless steel S t ah I and has an outside diameter of approximately 1/8 Customs. Due to the fact that the pipe 29 for measuring the deposition pressure inside the auxiliary gas pipe 13, d. H. shortly before its free end ends, it is ensured that the or measured pressure basically in a steady state is without excessive fluctuations that would be present, when the end of the tube 29 beyond the free end of the auxiliary gas tube 13 and into the turbulent mixing zone would protrude at the transition area and downstream (in the direction of flow of the primary Gas medium) from this transition area.

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After the build up of the removal of the glass particles out the exhaust pipe provided device parts Ls 12 and his Arrangement in relation to the exhaust pipe 11 and substrate pipe 10 is described, the operation of the Device part Ls 12 during the

Preform manufacturing step of the deposition from the chemical vapor phase reaction briefly explained together with the advantages resulting from the above-described construction of the invention Device part Is 12 result.

Just before the preform manufacturing step of the Deposition from the chemical vapor phase reaction becomes the pressure of the auxiliary gas introduced into the opening 31 set to the desired value, which experience has shown during the deposition from the chemical vapor phase reaction the best results in terms of the quality of the deposited layer or layers and the per Time unit of deposited amount of material results. Then it will be with the deposition from the chemical vapor phase reaction started by the primary gaseous medium flowing into the interior of the substrate tube 10 and through it can flow through and from there into the interior of the Exhaust pipe 11 so that it is then jointly or mixed with the auxiliary gas through the space between the Outer surface of the Hi Ifsgas pipe 13 and the inner surface of the Exhaust pipe 11 flows through it. At the same time, the Combination of the substrate roh rs 10 with the exhaust pipe 11 in rotation, while a heat source, preferably a burner, along the longitudinal axis of the substrate tube the outside of which is moved along.

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If desired, with scraping off G LaspartikeLn to begin what at the same time with or afterwards or even before the start of the preform manufacturing step Deposition from the chemical vapor phase reaction can, the motor 15 is put into operation so that the Connecting pipe 20 rotates in the above-mentioned direction of rotation, the is opposite to the direction of rotation in which the substrate tube

10 and the exhaust pipe 11 during the deposition from the rotating chemical vapor phase reaction. Since that Connector 26 allows the auxiliary gas pipe 13 due to its own weight on the above mentioned Floor surface rests, the auxiliary gas pipe 13 is constantly either directly with the inner surface of the Auxiliary gas pipe 11 or with any on such inner surface to be in contact with glass particles accumulated on the bottom surface.

This means that by the movement of the cooperating outer peripheral surface of the Auxiliary gas pipe 13 and the inner surface of the exhaust pipe

11 on the bottom surface in opposite directions Circumferential directions are those of the respective affected Glass particles accumulated on the surface can be detached or scraped off from there. Thereupon the detached or Scraped glass particles are entrained by the flow of the two mixed gaseous media and flow in this flow through the space between the auxiliary gas pipe 13 and the exhaust pipe 11 and out of it open end. Because of the reduction in the flow area of the exhaust pipe due to the therein located auxiliary gas pipe and because of the addition of the Flow of the auxiliary gas to the flow of the primary gas medium

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"3CT11847

through the interior of the exhaust pipe 11 is the Flow rate of the mixture of the two gas media through the space between the inner surface of the exhaust pipe 11 and the outer surface of the Auxiliary gas pipe 13 is considerably larger than usual Arrangements for the implementation of the

Preform manufacturing step of the deposition from a chemical vapor phase reaction, in which only the primary gas medium flows through the interior of the exhaust pipe 11. This increased flow rate affects the tendency of the glass particles to settle in the interior of the exhaust pipe, contrary, because the residence time of the glass Part \ angle in the interior of the exhaust pipe 11 is shortened and these particles remain in the air.

During the preform making step of the deposition the chemical vapor phase reaction becomes the pressure am free end of the auxiliary gas tube 13 continuously or in monitored at regular intervals, either by a Operator working on the deposition pressure gauge 30 appearing displays are observed, or automatically by a control computer or the like Data processing of a known type every significant change in pressure is evaluated and, if necessary, used to determine the Operating conditions of the preform manufacturing step of FIG Deposition from the chemical vapor phase reaction such as pressure or volume the primary gas medium, which is introduced into the interior of the substrate raw rs 10, or the pressure or the Volume of the auxiliary gas introduced into opening 31. This setting can be made by the operator on the Basis of the observation of the pressure gauge 30

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information received or from the Control computer or a similar device in direct dependence of a signal indicating the size of the measured pressure. The latter option will currently preferred, especially because an information processing device and / or controlling The facility is in place anyway and is used to set the various parameters of the

Preform manufacturing step of the deposition from the chemical vapor phase reaction, e.g. B. the pressure that To control gas volumes, the ratio of fuel gases to oxygen of the burner and the like. Actually represents the presence of the device part according to the invention 12 for the removal of glass particles and its connection with such information processing and Control device a further step towards a complete automation of the

Preform manufacturing step of the deposition from the chemical vapor phase reaction.

By introducing the Hi Ifs gas into the Transition area 14 will basically have two advantages achieved. One of these advantages is that a gas mixing zone is created in which the two gaseous Media mix with each other and that this mixing zone is between the downstream (in the direction of flow of the primary gas medium) located end of the substrate tube 10 and the free end of the auxiliary gas pipe 13 is located and thus effectively the interior of the substrate roh res 10 of the Separates area where the glass particles in the interior of the exhaust pipe 11 accumulate. This means that those in the interior of the exhaust pipe 11 are loosely present Glass particles are prevented from getting back into the interior of the substrate roh res 10 and there possibly the material on the inner surface

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of the substrate tube 10 deposited layer defective.

The second important advantage is that the Introduction of the 'Hitfsgase's' on the downstream (in Direction of flow of the primary gas medium) located end of the substrate tube 10 prevailing pressure controllable is increased so that the preform manufacturing step of Deposition from the chemical vapor phase reaction higher and controllable pressures and thus with increased efficiency of the separation can be carried out. This leads to the condition that fewer glass particles are produced, so that only a smaller amount of such glass particles even reaches the exhaust pipe 11 and thereby the risk of such glass particles being deposited in the interior of the exhaust pipe 11 is reduced.

It is particularly advantageous to use the VorridhtungsteiI to remove glass particles from the interior of the Exhaust pipe 11 during the preform manufacturing step the deposition from the chemical vapor phase reaction such as described above, however, the part can also be used for other purposes and during other steps of preform production as well, in particular to control the pressure present in the interior of the exhaust pipe 11 and thus indirectly the pressure in the interior of the Printed substrate raw rs 11 at its downstream End or in its entire interior. For example, the device can also be used during the Process step of collapsing what is present after the deposition with one or more layers inner coated substrate roh res 10 after completion of the Preform manufacturing step of the deposition from the chemical vapor phase reaction can be used.

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Claims (13)

Patent claims 1. A method for producing an optical waveguide preform, in which a glass tube (10) from one side reaction gases introduced and that Glass tube is internally coated by deposition from a chemical vapor phase reaction, in which the Exhaust gases from the chemical vapor phase reaction that too coating glass tube (10) on the other side leave an exhaust pipe (11) connected to this glass tube and in the case of an auxiliary gas in the exhaust pipe Direction of flow of reaction gases and exhaust gases opposite direction of flow by means of a The outlet end of the exhaust pipe (11) is introduced into the pipe (13), characterized in that the pipe (13) used to introduce the auxiliary gas is of this type offset from the longitudinal axis of the exhaust pipe (11) and is flowed through by the auxiliary gas that a Deposition of glass particles on the inner wall of the exhaust pipe (11) is largely prevented and there separated glass particles are detached again and removed will. ZT / Pi-Kg / R R.Peckman-K.Karbassiyoon 1-3 04/08/1986 2421A 2. The method according to claim 1, characterized in that the pipe (13) used to introduce the auxiliary gas so arranged within the exhaust pipe (11). will that a Part of its outer peripheral surface on part of the Inner surface of the exhaust pipe (11) rests and there is a contact zone that at least the exhaust pipe (TD around its longitudinal axis is rotated so that the one another adjacent surfaces of both tubes relative to each other move and thereby existing deposits of glass particles are detached at the contact zone and that the detached glass particles by the gas flow, which in the Gap between the two pipes (11, 13) flows, can be removed from the exhaust pipe (11). 3. The method according to claim 2, characterized in that the pipe (13) used to introduce the auxiliary gas as follows is arranged within the exhaust pipe (11) that the contact zone during the rotation of the exhaust pipe (11) always remains stationary in the room on the current floor area of the interior of the rotating exhaust pipe (11). 4. The method according to any one of the preceding claims, characterized in that the initiation of the Auxiliary gas used tube (13) in such a way around its longitudinal axis is rotated that its outer peripheral surface moves past the contact zone. 5. The method according to claim 4, characterized in that the two tubes (11, 13) resting against one another at the contact zone are rotated about their longitudinal axes in such a way that the inner peripheral surface of the exhaust pipe (11) and the outer peripheral surface of the for the introduction of the auxiliary gas used tube (13) in opposite directions move past the contact zone. ZT / Pi-Kg / R R.Peckman-K.Karbassiyoon 1-3 04/08/1986 2421A 6. Apparatus for performing the method according to any one of the preceding claims, consisting of the with the Inner coating to be provided glass tube (10), the so connected exhaust pipe (11), means for carrying out the inner coating, one in the exhaust pipe (11) protruding pipe (135 for the introduction of an auxiliary gas, wherein between the inner wall of the exhaust pipe (11) and the pipe (13) located therein for introducing the auxiliary gas an intermediate space remains for the outflow of the exhaust gases, means (26, 20, 23) for the arrangement of the for the introduction the pipe (13) provided with the auxiliary gas and means for introducing the auxiliary gas into this pipe (13), characterized in that means (15, 16, 17, 18, 19) are present which for the introduction of the auxiliary gas pipe (13) so hold inside the exhaust pipe (11) that part of its outer peripheral surface on part of the inner surface of the Exhaust pipe (11) and there is a contact zone and at the same time a relative movement of the two adjacent surfaces past the contact zone cause in such a way that the glass particle deposits present at the contact zone are detached from glass particles and removed from the exhaust pipe (11) by the gas flow present in the space between the two pipes (11, 13) will. 7. Apparatus according to claim 6, characterized in that that the means for holding the pipe (13) used to introduce the auxiliary gas, this pipe so keep inside the exhaust pipe (11) that the contact zone is stationary during the relative movement of the two pipes Space always remains at the current floor area of the interior of the exhaust pipe (11). ORIGINAL INSPECTED ZT / Pi-Kg / R R.Peckman-K.Karbassiyoon 1-3 04/08/1986 2A21A 8. Apparatus according to claim 7, characterized in that that the means causing the relative movement, that Exhaust pipe relative to the pipe located in it Rotate the introduction of the auxiliary gas around its longitudinal axis. 9. The method according to any one of claims 6 to 8, characterized characterized in that the cause the relative movement Means rotate the two tubes (11, 13) resting against one another at the contact zone about their longitudinal axis, that the inner peripheral surface of the exhaust pipe (11) and the outer circumferential surface of the for the introduction of the auxiliary gas provided tube (13) in opposite directions to move past the contact zone. 10. Device according to one of the preceding claims, characterized in that the means (31, 33, 20, 23) a gas connector (23) for introducing the auxiliary gas with rotatable and sealed gas feedthrough that contain has a stationary housing with an inner channel (22) communicating with at least one inlet port (31) stands, through which the auxiliary gas is introduced into the channel (22) that the gas connector (23) a Contains connecting tube (20), one end of which (21) sealed in the channel is rotatably mounted relative to the housing and the other end (25) is outside of the housing is located and with the inlet end of the for Introduction of the auxiliary gas used pipe (13) is connected that the cause the relative movement Means contain a motor (15) and means which the rotation of the motor shaft (16) on the connecting pipe (20) transferred and thereby rotate this around its longitudinal axis. ZT / Pi-Kg / R R.Peckman-K.Karbassiyoon 1-3 04/08/1986 2421A 11. The device according to claim 10, characterized in that that the inlet end of the for the introduction of the auxiliary gas provided tube (13) by means of a flexible coupling piece (26) tightly to the other end (25) of the Connection tube res (20) is connected and the rotation of the Connection pipe res to the introduction of the auxiliary gas used tube (13) transfers. 12. Device according to one of claims 6 to 11, characterized in that means (29, 30) are provided which at the outlet end of the to initiate the Auxiliary gas provided pipe (23) monitor the prevailing pressure and the one pressure gauge (30) and one itself from the pressure gauge through the one in the gas connector (23) contained channel (22) and through the tube (13) provided for introducing the auxiliary gas into the area of contains the outlet end extending line (29) and the pressure prevailing in this area on the Pressure gauge transmits. 13. The device according to claim 12, characterized in that that the line (29) located inside the tube (13) provided for introducing the auxiliary gas to the Pressure measurement at a predetermined distance from From letting this tube (13) ends. ZT / Pi-Kg / R R.Peckman-K.Karbassiyoon 1-3 04/08/1986 2421A