DE2107387A1 - Method and arrangement for connecting components in ventilation systems with high requirements for tightness - Google Patents

Description

SHAREBOLAGET SVENSKA FLlKTFABRIKEN Nacka / Sweden

Method and arrangement for connecting components in ventilation systems with high requirements for tightness.

The present invention relates to a method and a corresponding arrangement for ventilation systems with high demands on the tightness of thin-walled components made of sheet metal, plastic or similar material Channels, connecting pieces between them, as well as bends and branches of such channels, the corresponding To connect components in pairs.

In the course of the ever increasing demands on density Duct systems in ventilation systems have always been proved more difficult to meet these demands. The previously used procedure, completely finished units in shape

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of straight ducts and parts of pipes (elbows, taps, etc.) prefabricated, as well as this by connecting pieces and sealing material Joining them together leads to leakage both at these connection points and at the folds of the individual duct components guided. This in turn led to difficult sealing work at the assembly areas in the form of putties and spatulas or even gluing over all connecting seams and thus a significant additional effort. The result fell also less than satisfactory due to the difficult accessibility on ceilings, walls and corners.

The bulkiness of such prefabricated units also often caused difficult-to-manage transport problems and entailed high costs for loading, transporting them away from the production site and setting up the units in the correct position on the assembly site. The loading capacity of the transport vehicles could seldom or never be used to more than 10 to 20 % due to the bulky size of the units, otherwise the so-called loading profile would be exceeded.

The purpose of the present invention - which represents a completely new idea both in the manufacture and in the transport and assembly of the various parts belonging to a ventilation system - is to eliminate the above-mentioned drawbacks. The method according to the invention is mainly characterized in that the free edge (engaging part) of one of the components to be connected is inserted into an associated part formed from two separate, spaced apart, also made of thin-walled components made of sheet metal, plastic or similar material U-shaped gap (encompassing part) between these two parts, which has mainly parallel surfaces with a free opening, which corresponds approximately to the thickness of the first-mentioned component, which gap - preferably by injection under pressure - with a coherent, plastic, temperature-independent, very sticky mass with a between -20 ° C and +80 ⁰ C mainly constant viscosity is filled, after which said

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free edge of the engagement part in the mass down to the ground or pressed into the vicinity of the bottom of the corresponding gap as well as that the engagement part is known per se Way is mechanically anchored at one or more points to one of the walls forming said gap, while said mass ensures a hermetically sealed connection between the engagement part and the grip part.

An arrangement according to the invention in order to have a very good seal two components belonging to a "ventilation duct" with one another to connect, is characterized in that one component has a free, cleanly cut edge, while the other component along its one edge line with two lying on both sides of a plane through the component, itself mainly over the entire length of the edge line extending strip is provided, which with each other and with the component along the mentioned edge line expediently by means of spot welding, rivets or the like. are connected »as well as that of uniformly thick U-shaped strips formed from the said strips Gap has a clear width which corresponds approximately to the thickness of the component mentioned and by the mentioned coherent sticky mass is filled, as well as that at least one strip with one or more holes to accommodate hollow rivets, thread-cutting screws or the like. for the mechanical anchoring of the first-mentioned component at the bottom of the gap or in the area of the latter in the latter Component is provided where the first-mentioned component is completely surrounded by the mass that hermetically seals the two components is.

An expedient embodiment of the arrangement in the Manufacture of a round duct for a ventilation system is characterized in that the channel consists of two mutually identical, mainly semicircular flat parts each with an engaging part and an encompassing part to the colliding edge lines of the flat parts is executed, which after inserting the corresponding engagement parts in the associated gripping parts with the adhesive with the above

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rigen mass completely filled crevices and mechanical anchoring represent a hermetically sealed circular duct.

A corresponding arrangement according to the invention for production a square or rectangular duct for a ventilation system is characterized in that the duct is made of four separate, mainly flat, flat parts, each with an engagement part and a grip part on the colliding edge lines of the flat parts and that the engagement part in question has a 90 angled edge is provided, the width of which is mainly the depth of the above gap in the associated encompassing part corresponds or is slightly less and that the four flat parts one after the other with the corresponding engagement parts in the associated encompassing parts with the gaps completely filled with the sticky mass are inserted and mechanically attached to one another are anchored, thus forming a hermetically sealed square or rectangular channel.

According to the invention, a flat-oval duct for a ventilation system consists of two flat, identical ducts Parts, preferably with a mainly flat intermediate zone and two quarter-circular end zones, each with one Engaging part or a wraparound part according to claim 4 executed parts, which after inserting the corresponding engaging parts in the associated encompassing parts with the gaps completely filled with the above-mentioned sticky mass and mechanical anchoring form a hermetically sealed flat oval channel.

An embodiment of a flat oval channel, preferably with a large cross-section, for a ventilation system consists of four flat parts that are identical in pairs, namely two mutually identical, preferably semicircular parts according to claim 4 Side parts and an even number, preferably two, opposite one another and the same as one another or similarly executed, flat sheet-like parts which are carried out according to claim 3 and which after insertion of the corresponding engaging parts in the associated gripping parts

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with the gaps completely filled with the above-mentioned sticky mass and mechanical anchoring one hermetically Form a closed, flat-oval canal.

A modified arrangement according to the invention for implementation of the method according to claim 1 in the end connection of two ducts belonging to a ventilation system or Channel parts is characterized according to the invention by two endless strips of sheet metal, plastic or similar material that are concentric with one another to form a separate, as a connecting piece executed unit are united. At least one of the two strips is with one another Strip facing, longitudinal 'endless groove or provided with corresponding raised points (warts) distributed over the circumference. This becomes the intended one ensures uniform spacing between the two strips, the two oppositely directed and with that mentioned above very sticky mass form completely filled gaps. The ends of two ducts or duct components are placed in this column each inserted from the corresponding side and anchored mechanically by said separate component. Together with the ducts or duct components mentioned, they form a hermetically sealed part of a ventilation system with several associated duct parts.

In order to facilitate the introduction of the duct components into the mentioned gaps, especially in the case of large duct dimensions, is, according to an expedient embodiment, the inner strip wider than the outer one.

In all of the above-described embodiments of the arrangements belonging to the invention, the gap exists (Wrap-around part) forming strips of flat ribbons. To the To give walls of the gap greater strength and at the same time a mechanical through a modified design of the engagement part Anchoring of the components used without the use of loose rivets, thread-cutting screws or other additional ones To enable sharing, a modified arrangement is characterized in that at least one of the two

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the gap (encompassing part) "forming strips on all longitudinal Side edges is bent 180 °. The so bent, thickened parts are preferably after same side turned. The free edge zone of the other duct part (engagement part) is also bent 180 ° (outwards seen from the bottom of the gap) and with the thickened zone of the opposite seito, compared with the above bent Strip facing, in such a way that after the introduction of the other channel part (engagement part) into the associated gap The above-mentioned sticky mass introduced into (encompassing part) bent zone of the canal part by resting against the bent edge line of the other strip, the current canal part (engagement part) Holds latching in the gap of the first-mentioned channel part (encompassing part). At the same time, it ensures the gap filling sticky mass creates a hermetically sealed connection.

This arrangement, like the arrangement described above for the encompassing or engaging parts, can be used to build thin-walled parts made of sheet metal * plastic or similar material for bends or branches in the form of T-pieces or X-pieces. One or more of the boundary surfaces consist of curved or curved surfaces, while the other surfaces are flat . Such a structure is characterized in that the flat surfaces belonging to the named bends or branches are provided with strips according to the invention along their edge lines intended for connection to other components to form a gap (encircling element), while one or more of the edge lines of the curved Surfaces with a 180 ° bent edge (engagement part) are designed for direct insertion and mechanical anchoring in the aforementioned gap, which is hermetically sealed with a sticky mass. Optionally, the curved surfaces belonging to the named bends or branches can be provided on the edge lines provided for connection to the other components with the named strips to form a gap (encompassing part), while one or more of the edge

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lines of the flat surfaces with a 180 ° bent edge (engagement part) for direct insertion and mechanical anchoring in the aforementioned, hermetically sealed with the sticky mass Gap are executed.

When installing a ventilation system that consists of a If there is a number of channels to be connected by connecting pieces or branches, difficulties often arise on the one hand, to keep the often quite long and consequently heavy duct parts in the correct position for fitting into the encompassing parts and on the other hand In addition, a lot of force is required to move the front edge of the channels, i.e. the engaging part, down to the bottom of the with the sticky mass filled gap to be pressed into a firmly attached encompassing part, for example to a connecting piece heard. In that, according to the present invention, a wall of the encompassing part is displaceable and cuff-like or collar-shaped, the cuff-shaped or collar-shaped part including the sticky mass pressed against the engaging part of the channel. the The invention thereby facilitates the assembly of bulky and heavy duct parts.

This modified method is characterized in that one of the belonging together forming the encompassing part Parts are cuff-shaped or collar-shaped and with a sliding fit is displaceable in the direction of the free edge of the other part of the encompassing part, in order to push the channel to facilitate over the other parallel part of the encompassing part and that after the mechanical fastening of the channel on the mentioned the other part, the first-mentioned part being pushed towards the edge of the engaging part of the channel and over it, until the engaging part is pressed into the mass to the bottom of the mentioned gap or its vicinity, after which the displaceable cuff-shaped or collar-shaped part of the encompassing part is finally attached to the other part mentioned, in order to provide a robust mechanical connection between the engaging and encompassing part to ensure, while the said mass ensures a hermetically sealed connection of the same.

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The invention also includes an arrangement for implementation this method in the mutual connection of two engagement parts, for example two channels. This arrangement is characterized by two mirror-inverted gripping parts that each with a cuff-shaped or collar-shaped part, which is partly in the direction of and partly to and over the end of the corresponding channel is displaceable, said cuff-shaped or collar-shaped part after the end Displacement for example by riveting or threaded screws on the other part is attached to a robust mechanical connection to ensure the two engagement parts or channels by the said double encompassing parts, while the Column of the two encompassing parts filling mass ensures a hermetically sealed connection.

The invention will now be described in more detail in connection with the accompanying drawing figures which show a number of examples Represent embodiments of the invention.

Fig. 1 shows an overview of a ventilation system with a number of connected by connecting pieces according to one or more of the following patent claims Channels, branches and bends that form a hermetically sealed channel system.

2a shows an exploded view of a T-piece in two parts with both straight and curved edge lines. This T-piece has a round cross-section and is for Connection with round channels is provided, as indicated in FIG. 1.

Fig. 2b shows a corresponding T-piece with a square cross-section.
Fig. 3a shows a round channel, which consists of two inventive

according to connected parts. Figure 3b is a corresponding one of four illustration

flat surface elements existing square channel. Fig. 4-a shows a round bend for 90 degree turns of a round channel.

Fig. 4b shows a corresponding square bend for a 90 degree turn of a square (ie square or rectangular) duct. 109847/1106

. Figure 5 is a corresponding arrangement at the end connection two square duct parts.

Fig. 6 shows a modified embodiment of both the grip part (Gap) as well as engagement part (the component inserted into the gap).

Fig. 7 shows an apparatus for carrying out a method of joining two mating parts, e.g. two channels.

In Fig. 1, the associated channel parts are denoted by A. They can be either round or square. In the case of round ducts, the T-piece C can, for example, match be executed with Fig. 2a. On the other hand, when it comes to channels rotates with a rectangular cross-section, the T-piece C can for example be designed in accordance with FIG. 2b. With D a manifold is designated. Such bends are available with both a round and a rectangular cross-section. With B is a separate component designed as a connecting piece for the end connection of two channels A or one channel A and of a channel part C or D.

In Fig. 2a, 1 and 2 denote two channel parts. One channel part has a free, neatly cut edge 3. On the edge line 4 of the other channel part 2, two strips 6, 8, lying on both sides of the plane through the surface of the channel part and extending mainly over the entire length of the edge line 4, are attached. The same are connected to one another and to the channel part 2 along the edge line 4, for example by spot welding. The strips form a uniform, thick U-shaped gap 5 (encompassing part) with a clear width 9 »which mainly corresponds to the thickness 7 of the channel part 1. The gap 5 is filled according to the invention in its entirety with a continuous sticky mass 11, which has a mainly constant between -20 ⁰ C and +80 ⁰ C viscosity. The mechanical anchoring of the channel part 1 (engagement part) in the gap of the channel part 2 (encompassing part) is ensured, for example, by one or more thread-cutting screws, which are inserted through holes made in advance, indicated by 12 in FIG. 2a.

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In Fig, 2b, corresponding parts are with the same Reference numerals as denoted in Fig. 2a. This T-piece, which has four right-angled corners in cross-section, is made of two flat surfaces 13, the two curved sides 14 and see also a flat, rectangular element 15.

In FIG. 3a, which relates to a round channel, corresponding parts are given the same reference numerals as in FIG Referring to previous Fig. 2a.

3b shows one of four identical flat parts 13 existing channel, which are connected to one another in a clockwise direction, for example. In this case it is Engaging part 14 with a right-angled fold 15 with a Width 15a provided, which is approximately the depth 15b of the gap in associated encompassing part 16 corresponds or is slightly lower.

In Fig. 4a, 1 and 2 denote the two parts that make up the round bend. One sub-element 1 shows a free, cleanly cut edge 3. At the edge line 4 of the other sub-element 2, two overlap each other the entire length of the edge line 4 extending strips 6, 8 attached. The strips are with each other as well as with the sub-element 2 connected along said edge line 4, for example by spot welding. The strips 6, 8 form here, as in the previously described designs, a uniformly thick U-shaped gap 5 (grip part) with an opening that is mainly the same width as the thickness of the insertable engagement part 1. The anchorage in mechanical terms between the sub-element 1 (engagement part) and the sub-element 2 with the gap (encompassing part) ensured in the manner described above, for example by one or more thread-cutting screws, while the hermetic seal at the connection is brought about by the sticky mass that completely fills the gap.

The manifold shown in Fig. 4b corresponds in relevant parts to that shown in Fig. 2b and described above T-piece with a square or rectangular cross-section. With regard to the sub-elements shown in FIGS. 2a, 2b and 4a, 4b

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one can either as well as "with channels a number of the same Utilize parts, i.e. an engagement part and a grip part take advantage of every prefabricated sub-element. However, it can be a relief from a manufacturing point of view represent, "for example in Fig. 2a a lower part with two Gripping parts (columns) and the upper part completely without such to produce, i.e. both edges of the upper part can be shaped as engagement parts with free edges. Such Execution saves work when assembling components during assembly.

In Fig. 5a with 19 and 20 two endless strips are designated. In the embodiment shown, the one strip 20 is provided with an endless groove 21. The two For example, strips are spot-welded to one another, so that there is a separate unit for joining two parts a ventilation system, see Fig. 1, e.g. parts A and B or B and C or G and A etc. Figs. 5b, 5c and 5d show other solutions to produce the intended distance between the strips 19 and 20, which is at least the thickness of the thickest part (e.g. the engaging part) of a Channel part element corresponds, for example 7 in Fig. 2a, which is inserted into the gap 23 completely filled with the sticky mass shall be. The introduction of the channel part element into the gap 23 is significantly facilitated if the inner Strip 20 is wider than the outer strip 19.

Fig. 5e shows a corresponding embodiment of the separate Connection part 22 in an end connection of channels and duct parts with a rectangular cross-section. At 24 · are denotes internal stiffening members which are provided if the end connection unit has relatively long sides.

Fig. 6 shows a modified embodiment of the strips 26 and 27, which form the gap 31. As can be seen, is one of the strips is folded inwards on both long edges. Optionally, both strips can be folded in this way. As with the previously illustrated embodiments, they are connected at 32 to a partial duct element by spot welding and represent a clipping part with their gap 31. The

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Gap 31 is completely filled with an inserted here by injecting sticky mass 35 with a between -20 ⁰ C and + 8O ⁰ C mainly constant viscosity. A corresponding engagement part is designated by 30 or 39 and is provided with a folded edge 28 or 36 engaging in the gap 31. Its end face 37 engages during insertion, with the strips 26 and 27 springing apart, behind the end face 38 of the strip 29 and then causes the two channel sub-elements 30 and 39 to be absolutely mutually anchored used to hold the strips 26 and 27 in the correct position during spot welding. It is of course a very big advantage in this modified version, never with thread-cutting screws, rivets or the like. having to work in order to achieve a secure mechanical anchoring. As in the previous embodiments, the sticky mass ensures a hermetically sealed connection. The folded edge of the strip (s) makes it much easier to insert the engaging part at the rounded inlet and when the two elements are finally anchored to one another.

The modification of the encompassing part shown in FIG. 6 can also be used in the case of those shown in the previous drawing figures Arrangements are used. This modification can also be used in the embodiment according to FIGS. 5a and 5d will. In this case, however, it is useful to have a Provide number of slots in the encompassing or engaging part on the circumference.

In Fig. 7, 41 denotes a channel part with two at B or B 'lying connecting pieces 42 are connected target. 4-3 is a junction each time. 44 are the free edges (Ends) of the channel part 41. A U-shaped gap is denoted by 46 and through an outer 48 and an inner part 45 formed. The end edge of the inner part is denoted by 42a and 42b is a nose or groove that allows the slidability of the cuff-shaped or collar-shaped part 48 is limited. The den

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Gap-filling sticky mass is denoted by 47. 49 and 50 are the opposite directions of displacement of the cuff-like or collar-like part 48 of FIG the end edge 42a or to the channel end 44 and over the same. When the sleeve part 48 is pressed over the channel end 44, push it against the bottom 51 of the gap 46. The retention of the channel part 41 is carried out by rivets or threaded screws with 52, 53 shows the final holding of the sliding sleeve 48 by means of organs that are just as easy to attach. 54 is a schematic line of symmetry for the two mirror-image encompassing parts shown, both as described above are movable.

- patent claims -

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Claims (1)

Claims . 1.) Method for connecting in pairs of components in ventilation systems with high requirements for tightness of thin-walled components made of sheet metal, plastic or similar material in the form of channels, connecting pieces as well as bends and branches for such channels, characterized in that the free edge (Engaging part) of one of the components to be connected is inserted into a U-shaped gap (encompassing part) formed between these two parts, which is made up of two separate parts that are located at a certain distance from one another and are also made of thin-walled components made of sheet metal, plastic or similar material, comprises mainly parallel surfaces with a free opening which corresponds approximately to the thickness of the first-mentioned component, which gap - preferably by injecting under pressure, - with a continuous, mouldable, temperature independent, highly sticky mass with a between -20 ⁰ C and +80 ⁰ C is filled in approximately constant viscosity, after which the said free edge of the engagement part is pressed into the mass to the bottom of the said gap or in the vicinity thereof, and that the engagement part in a manner known per se on one or more Places is mechanically anchored to one of the walls forming the gap mentioned, while the said mass ensures a hermetically sealed connection of the engagement part with the grip part. 2, modification of the method according to claim 1, characterized in that one of the parts that belong together and form the encompassing part or designed in the shape of a collar and with a sliding fit in the direction of the free edge of the second part of the encompassing part is displaceable in order to facilitate the sliding of the channel over the other parallel part of the encompassing part and that 109847/1105 after mechanically fastening the channel to said other part, the first-mentioned part in the direction of the edge of the engagement part of the channel and over it is pushed until the engaging part is completely in the mass down to the bottom of the mentioned Gap or the vicinity thereof is pressed in, after which the slidable cuff-shaped or collar-shaped part of the encompassing part is finally attached to the other part in order to ensure a robust mechanical connection of the engagement and grip parts, while the said mass ensures a hermetically sealed connection of the same ·. 3. Apparatus for performing the method according to claim 1 for the very tight connection of two to one ventilation line belonging components, characterized in that one component is a free, cleanly cut one Has edge, while the other component along its one edge line with two on both sides of the plane through The surface of the component is provided with strips that extend mainly over the entire length of the edge line is, which with each other as well as with the component along the named edge line expediently by spot welding, riveting ο the like. connected to that of the said strips formed, evenly thick U-shaped gap a clear width which corresponds approximately to the thickness of the said component and by the said coherent sticky mass is filled in, as well as that at least one strip with one or more holes for receiving rivets, thread-cutting screws or the like. for mechanical anchoring of the first-mentioned component is provided at or at the bottom of the gap in the last-mentioned component, where the first-mentioned component is completely surrounded by the mass that hermetically seals the two components. 4-, device according to claim 3, characterized in, that a round duct for a ventilation system consists of two identical ones, mainly semicircular flat parts consists, each with 109847/1105 an engagement part or grip part on the colliding edge lines of the flat parts, which after inserting the corresponding Engaging part in the associated re-gripping part and its gap completely filled with the above-mentioned sticky mass and, after mechanical anchoring, a hermetic one form closed round channel. 5. Apparatus according to claim 3, characterized in that a square or rectangular one Channel for a ventilation system consists of four separate, mainly flat, flat parts, each with an engagement part and an encompassing part on the colliding edge lines of the flat parts and that the in The engagement part in question is provided with a right-angled fold, the width of which is mainly the depth of the above Gap in the associated encompassing part corresponds to or is slightly less and that the four flat parts one after the other with the associated engagement parts in the corresponding Gripping parts and their gaps, which are completely filled with the sticky mass, are inserted and mechanically anchored to one another and thus form a hermetically sealed square or rectangular duct. 6. The device according to claim 3, characterized in that a flat oval channel for a Ventilation system consists of two flat parts that are identical to one another, preferably with a mainly flat one Central zone and two quarter-circle-shaped end zones, each with an engagement part or a grip part according to claim 4 flat parts, which after inserting the corresponding engagement part into the associated encompassing part and its with the above-mentioned sticky mass completely filled gap and after mechanical anchoring a hermetically closed one Form a flat oval canal. 109847/1105 7 · Device according to claim 3 »characterized in that that a flat oval channel, preferably with a large cross-section, is made for a ventilation system consists of four flat parts that are identical in pairs, namely two mutually identical, preferably semicircular side parts, executed according to claim 4, as well as an even number, preferably two, opposite one another, one below the other the same or similarly designed, flat flat parts, executed according to claim 3, one after the other after mutual Insertion of the corresponding engagement part into the associated encompassing part and its sticky with the above-mentioned Mass-filled gap and, after mechanical anchoring, form a hermetically closed flat-oval channel. 8. Modified apparatus for performing the method of claim 1 in the end connection of two to one Ducts or duct parts belonging to the ventilation system, characterized by two endless strips of sheet metal, Plastic or similar material that is concentric with one another to form a separate unit designed as a connecting piece are connected, with at least one of the two strips facing the other strip with a longitudinal, endless groove or with corresponding raised points (warts) distributed over the circumference to ensure the intended uniform spacing between said strips is provided, the two oppositely directed and with the strongly sticky mass mentioned form filled gaps into which the ends of two channels or channel parts each emerge inserted in one direction and mechanically anchored to one another by the said separate unit by means of the specified means are and together with the named ducts or duct parts a hermetically sealed part of the ventilation system form several associated channel parts. 9. Apparatus according to claim 8, characterized in that that the inner strip is made wider than the outer one to allow the insertion of the engaging parts in the said To ease gap. 109847 / 110S 10. Modified device according to claim 3-7 j characterized in that at least the one of the "two a gap (grip part)" forming strips is folded on all longitudinal side edges, the folded, thickened parts preferably after the same side, as well as that the free edge zone of the other duct part (engagement part) also folded, is (seen outwards from the bottom of the gap) and with the thickened zone on the opposite side compared to facing said folded strip in such a way that after inserting the other channel part (engaging part) into the associated gap (encompassing part) the folded (part of the channel part introduced into the above-mentioned sticky mass (engagement partly) in a delimiting edge line by resting against the folded edge line of the other strip that in Eede standing channel part (engagement part) latches in the gap (encompassing part) of the first-mentioned channel part, wherein at the same time, the sticky mass filling the gap ensures a hermetically sealed connection. 11. The device according to claim 3 or 10 for building thin-walled components made of sheet metal, plastic or similar material to bends or branches in the form of so-called T- or X-pieces, with one or more of the boundary surfaces consist of curved or curved surfaces, while the other surfaces are flat, characterized in that that the flat surfaces belonging to the named bends or branches on their connection with the rest Associated components provided edge lines with the strips in question to form a gap (encompassing part) are, while the edge lines of one or more of the curved surfaces with a folded edge (engaging part) to direct insertion and mechanical anchoring carried out in the aforementioned with the sticky mass hermetically sealed gap are. 109847/1105 12. The device according to claim 3 or 10 for the construction of thin-walled components made of sheet metal, plastic or the like Material for bends or branches in the form of so-called T- or X-pieces, with one or more of the boundary surfaces made of curved or curved surfaces, the rest Surfaces, however, consist of flat surfaces, thereby characterized in that the curved surfaces belonging to the named bends or branches on their Edge lines provided for connection with other associated components with the strips in question for formation of a gap (wrap-around part) are provided, while one or more of the edge lines of the flat surfaces are folded Edge (engaging part) for direct insertion and mechanical anchoring in the aforementioned, with a sticky mass hermetically sealing gaps are carried out. 13. Apparatus according to claim 3-7 »characterized in that the two are the walls of the gap (Wrap-around part) forming strips opposite one another attached, through holes for the insertion of the inserted part (engaging part) mechanically anchoring, thread-cutting Screws or rivets are provided. Device for performing the method according to claims 1 and 2, preferably when connecting two engagement parts, E.g. two channels with each other, characterized by two mirror-image (5 * 0 encompassing parts, each having a cuff-shaped or collar-shaped part (48) which on the one hand in the direction (49) of and on the other hand is displaceable in the direction (10) up and over the end (44) of the associated channel part (41), said cuffs * or collar-shaped part (48) after completion of the displacement, for example by riveting or threaded screws (53) on the other Part is attached to a robust mechanical connection of the two engagement parts or channels through the said 109847/1105 lo to ensure double grip parts, while the said, the column (46) of the two encompassing parts filling mass (4-7) ensures a hermetically sealed connection. 15. Ventilation system consisting of two or more in accordance with one of claims 3-13 interconnected channels, connecting pieces or branches below Creation of a hermetically sealed canal system. 1098 £ 7/1105