WO2014071905A1

WO2014071905A1 - Airway

Info

Publication number: WO2014071905A1
Application number: PCT/DE2013/000649
Authority: WO
Inventors: Heinrich Meyer
Original assignee: Berliner Wartungs- und Kundendienst GmbH
Priority date: 2012-11-07
Filing date: 2013-11-05
Publication date: 2014-05-15
Also published as: DE202012010570U1; EP2956700A1; PL2956700T3; EP2956700B1; HUE033420T2

Abstract

The invention relates to an airway for removing or supplying gaseous media such as solvent-containing air flows. The invention addresses the problem of improving an airway for removing or supplying gaseous media such as solvent-containing air flows in such a manner that same are gas and pressure-tight and corrosion-resistant against chemical, mechanical and abrasive influences, while simultaneously reducing the weight of the airways and the maintenance costs, improving and simplifying assembly, increasing the useful life and saving material and costs. This problem is solved in that: the walls (2.1, 2.2, 2.3, 2.4) are formed from a polypropylene sandwich panel (3) with fibreglass-reinforced outer and inner protective layers (4, 5), a honeycomb-structured core (6) and at least one profile body (8) which overlaps, on the airway outer side, the joints (7) of adjoining walls (2.1, 2.2, 2.3, 2.4), said joints being connected by adhesion and force-fitting using a first adhesive (KM1), and which profile body is held on the outer protective layers (4) by the adhesive (KM1) and additionally with fixing means (13) in a gas and pressure-tight manner; the arms (14.1, 15.1, 16.1, 17.1) of the connecting flange (14, 15, 16, 17) are fixed on the inner edges of the walls (2.1, 2.2, 2.3, 2.4) in a gas and pressure-tight manner by adhesion and force-fitting using the first adhesive (KM1) and fixing means (13); and the arm (14.2, 15.2, 16.2, 17.2) projecting perpendicular to the airway axis (K) is undetachably connected to the perpendicular projecting arm of the further airway (21) in order to form the gas- and pressure-tight coupling using a second adhesive (KM2) and screwing means (19) or said perpendicular projecting arms are detachably connected to one another using a sealing means (23) and screwing or catching means (19).

Description

air duct

description

The invention relates to an air duct for off or

Supplying air streams containing gaseous media such as solvents, with plastic walls joined together perpendicularly to one another along the longitudinal sides and attached in each case to the front ends of the air duct

Connecting flanges of a profile with mutually perpendicular bent legs, of which one leg serves for connection to the inside edges of the walls of the air duct and the other, perpendicular to the channel axis projecting leg forms a coupling surface for connection to a leg of another air duct.

State of the art

When painting body parts are known to excess in the spray particles located

CONFIRMATION COPY the paint and coating material washed out by means of water and the spray booth exhaust air with fans, suction devices o. The like. transported through exhaust ducts, which must ensure that the exhaust air can not escape into the atmosphere.

These exhaust air ducts consist of thin steel sheet of different qualities (DE 23 53 625 AI, CH 675 271 A5, DE 41 18 250 A15), of plastic plates (CH 398 016), for example polypropylene plates or prefabricated plastic parts, which are claw-like along a longitudinal edge and the other longitudinal edge is shaped so that it can be enclosed on both sides by the claw-like longitudinal edge of an adjacent wall element, whereby wedge-shaped thickenings and correspondingly shaped bulges along the longitudinal edges are provided, which form a kind of labyrinth closure (DE 1 989 185).

Sheet metal ducts reach a no longer negligible weight, especially in large dimensions and channel cross-sections, which requires complex suspension or supporting structures. Because of the corrosion of the sheet metal ducts they must be constantly maintained and renewed relatively frequently.

A further disadvantage is that the channels of plastic due to the positive and negative pressure in the forwarding of the gaseous media tend to flutter the walls, which promotes leaks at the flange of adjacent channels and leads to noise.

This disadvantage is tried in the prior art counteract by the fact that the walls by stiffening upright steel rails (CH 398 016) to stabilize beads or rods inserted in the clear ventilation duct cross-section.

Ultimately, however, all these measures lead to further increase the weight of the channels with the attendant disadvantages. In addition, the

Increased flow resistance through the arranged in the interior of the ventilation duct stabilization rods.

In this prior art, the present invention seeks to improve an air duct for discharging or supplying gaseous media such as solvent contained air streams such that they are gas and pressure tight and corrosion resistant to chemical, mechanical and abrasive attacks Simultaneous reduction of weight and maintenance of the channels, the improvement and simplification of the assembly and the increase of the period of use as well as the saving of material and costs are.

This object is achieved by an air duct section of the type mentioned with the features of claim 1. Advantageous embodiments of the air duct according to the invention are the dependent claims.

The solution according to the invention is the realization based on non-corrosive polypropylene sandwich panels gas and pressure-tight to assemble an air duct and form them as exchangeable units.

This is achieved in that the walls are formed of a polypropylene sandwich panel with fiberglass-reinforced outer and inner layers and a honeycomb core and at least one profile body, which engages with a first adhesive material and non-positively connected joints abutting walls air kanalaußenseitig and is held gas-tight and pressure-tight on the outer cover layers with the first adhesive and additionally with fastening means, and that the legs of the connecting flange are attached to the inside edges of the walls by material and adhesion by means of the first adhesive and fasteners gas and pressure tight , And that the projecting perpendicular to the channel axis leg for gas and pressure-tight coupling to the vertical protruding leg of another air duct with a second adhesive and screw means with each other insoluble or with a sealant and screw o the latching means are detachably connected to each other.

In a further embodiment of the invention comprises the first adhesive for the material connection of the joints of the walls with each other, the walls with the profile body and the legs of the connecting flange with the walls elastically tough 1- or 2-component epoxy resin and / or polyurethane and / or polyurea formulations or mixtures / mixtures of these resin groups, which have elastic tenacious properties, so that occurring forces of the joints can be accommodated and the air duct is sealed against internal pressure and gas outlet safely. The frictional connection between the profile body and the walls is produced by fastening means, such as blind rivets, which are arranged at regular intervals from one another along the longitudinal sides of the two walls and are introduced vertically into the adjoining walls by bores in the profile body.

According to another preferred embodiment of the air duct according to the invention, the second adhesive for the permanent connection between the legs of the connecting flange and the legs of the air duct to be coupled is a 2-component epoxy resin formulation containing a mixture of 1.0 to 70 wt. % Bisphenol A (epichlorohydrin) having an average molecular weight <700, 1.0 to 50% by weight bisphenol F (epichlorohydrin) having an average molecular weight <700, 0.1 to 10.0% by weight Epoxy resin (A / F) adduct with phenolic resin, 1.0 to 29.0% by weight of 6-hexanediol diglycidyl ether, 1.0 to 20.0% by weight of p-tert-butylphenol glycidyl ether, 1.0 to 20, 0% by weight

Polypropylene glycol diglycidyl ether, from 5.0 to 70% by weight of filler and from 0.1 to 5.0% by weight of additives as component A and as component B from 1.0 to 29% by weight of benzyl alcohol, from 1.0 to 29, 0 wt .-% isophorone diamine, 0.1 to 5.0 wt .-% of 3,6-diazaoctamethyleldiamin, 0.1 to 5.0 wt .-% 4,4'-isopropylidenediphenol, 0.1 to 5.0 wt % Of 2-piperazin-1-ylethylamine, 0.1 to 5.0% by weight of polyaminoamide, 0.1 to 5.0% by weight of p-tert-butylphenol, 0.1 to 10.0 parts by weight. % Salicylic acid and 0.1 to 5.0% by weight of additives.

Of particular advantage is that this adhesive a has extraordinary high adhesion to the metal surfaces of the legs and at the same time has a high chemical resistance to aggressive solvents in the exhaust air.

Alternatively, it is possible, without departing from the invention, to use a rubber-elastic seal instead of the adhesive, which is inserted between the abutting legs of the connecting flanges and sealingly guided by aligned in alignment holes of the two legs locking or screwing means in the clamping state.

It is advantageous if the inner air-side fastening means are sealed with a sealing layer of a 2-component epoxy resin coating containing a mixture of 1.0 to 70 wt .-% bisphenol A (epichlorohydrin) with a middle Molecular weight <700, 1.0 to 50% by weight of bisphenol F (epichlorohydrin) having an average molecular weight <700, 0.1 to 10.0% by weight of epoxy resin (A / F) adduct with phenolic resin, 1, 0 to 29.0% by weight of 6-hexane diol diglycidyl ether, 1.0 to 20.0 wt. % p-tert-butylphenol glycidyl ether, 1.0 to 20.0% by weight

Polypropylene glycol diglycidyl ether, 5.0 to 70 wt .-% filler and 0.1 to 5.0 wt .-% additives as component A and as component B 1.0 to 29 wt .-% benzyl alcohol, 1.0 to 29.0 % By weight of isophoronediamine, 0.1 to 5.0% by weight of 3,6-diazaoctamethylenediamine, 0.1 to 5.0% by weight of 4,4'-isopropylidenediphenol, 0.1 to 5.0% by weight. -% 2-piperazinyl-1-methylamine, 0.1 to 5.0% by weight of polyaminoamide, 0.1 to 5.0% by weight of p-tert-butylphenol, 0.1 to 10.0% by weight. % Salicylic acid and 0.1 to 5.0 wt% additives.

It has proved to be useful that the Profile body is an L-angle, whose short parallel to the joint of the abutting walls arranged leg with the outer cover layer of a wall and its long aligned perpendicular to the joint leg bonded to the outer cover layer of the other wall respectively along the longitudinal sides and by means of in holes the leg (introduced fasteners are held on the respective wall.

Another embodiment is that the

Profile body is an isosceles angle, whose parallel to the joint of abutting walls arranged leg with the outer cover layer of one wall and its other aligned perpendicular to the joint leg with the outer cover layer of the other wall glued respectively along the longitudinal sides and by means of holes in the leg introduced fasteners are held on the respective wall, wherein the leg length of the legs relative to the thickness of the wall by at least 40 mm larger.

Both variants have the advantage that the legs of the profile body in the longitudinal direction of the walls at the same time stabilizing against pressure fluctuations and the load is evenly distributed to the legs.

In a further embodiment of the invention, the protruding perpendicular to the channel axis legs of the connecting flanges can be arranged to each other so that they form no circumferential flange around the air duct outlet and at the respectively associated legs gaps, each adapted from one to the dimension of the gap Cover and support plate is covered by the second adhesive and fastening means on a surface facing away from the coupling surface of the legs is fixed material and non-positively.

A further alternative embodiment provides that the leg projecting perpendicular to the channel axis of the

Connecting flanges in their leg length relative to the channel axis eccentrically shifted by leg width and each are arranged so that they form an outer circumferential flange edge and each abutting legs a common joint, which is covered by a cover and support plate, by the second adhesive and fastening means a surface facing away from the coupling surface of the legs is fixed material and non-positively.

In order to distribute the forces and loads evenly on the walls of the air duct, are arranged in a preferred embodiment, the holes for receiving the fastening means in the legs each along the longitudinal sides of the walls and the holes in the legs of the connecting flanges evenly spaced , Likewise, the fastening means and the locking or screw connections for the frictional connection between the walls and the profile body or the walls and legs of the connecting flange along the longitudinal sides of the walls or the legs of the connecting flanges have an equal distance from each other.

Particularly suitable materials for the profile body and / or the connecting flange are angle profiles made of metal, preferably galvanized steel or structural steel. Of course, but also possible to use profile body made of suitable plastic, which is associated with the advantage that the material connection between profile bodies and the walls can be made by a weld.

Each wall is effectively bordered along the longitudinal sides of a profile body, so that the flexural rigidity of the wall is increased accordingly and easily pressure fluctuations can be accommodated without fluttering of the walls. The longitudinal and width dimensions of the walls can thereby also be readily large-sized, whereby the assembly is simplified accordingly. In a further preferred embodiment of the invention, the walls of the air duct are formed from a single panel, which has at least three openings provided with miter surfaces, wherein the openings are arranged in the panel, that the outer fiberglass-reinforced cover layer is maintained, the openings from each other have a matched to the wall height of the air channel distance and the miter surfaces are integrally connected by the first adhesive so that forms a hollow body with vertical walls, of which a wall with its front side on the inner top surface of the panel forms a joint through the fabric body with the first adhesive and the fastening means along the respective longitudinal sides of the walls and non-positively fastened profile body is gas-tight and pressure-tight sealed.

This has the extraordinary advantage that large-sized sandwich panels, for example, with dimensions of 3 mx 4 m, can be used, whereby the assembly can be simplified and the assembly cost can be significantly reduced. Further advantages and details will become apparent from the following description with reference to the accompanying drawings.

embodiment

The invention will be explained in more detail below with reference to two embodiments.

Show it

1 is a perspective view of the air duct according to the invention, each with frontally arranged connection flanges,

2a and 2b are sectional views along the line A-A of Figure 1 a joined together from four walls air duct, the joints are air duct outside stabilized by profile body.

Fig. 3 is a side elevational view in section taken along line B-B of Fig. 1 of a connecting flange secured to the inner edges of the air duct;

4a and 4b representations of two air ducts, which are connected to each other inextricably or detachably connected at their end sides by connecting flanges,

5 shows another variant of a profile body from an isosceles angle, 6a and 6b show various embodiments of the connecting flange in a perspective view;

Fig. 7 is an air duct formed from a single sandwich panel.

example 1

Fig. 1 shows in perspective the air duct according to the invention 1. The box-shaped air duct 1 has four walls 2.1, 2.2., 2.3. and 2.4 from a polypropylene sandwich panel 3 (see also Fig. 7) with glass fiber reinforced outer and inner cover layers 4 and 5 and a honeycomb core 6. The walls are variable in length and thickness. In the example shown here, the length is 1.50 m and the thickness is 15 mm.

The walls 2.2 and 2.4 lie with their end faces S on the inner cover layers 5 of the walls 2.1 and 2.3 and each form joints 7, with a first adhesive KM1 of elastically toughened 1- or 2-component epoxy resin and / or polyurethane and / or polyurea formulations or mixtures / mixtures of these resin groups are filled. The adhesive KM1 hardens and connects the walls 2.1-2.4 at their joints gas- and pressure-tight by material and adhesion to the air duct. 1

The along the longitudinal sides LS of the walls 2.1-2.4 extending joints 7 are covered with a profile body 8 from an L-angle 9, the different lengths leg 10 and 11 overlap the longitudinal sides LS of the respective walls on the outside and on the outer cover layers 4 cohesively are glued to the adhesive KM1. The legs 10 and 11 have at regular intervals from each other holes 12, are introduced vertically into the respective sandwich panel 3 by the fastening means 13, for example blind rivets, so that the profile body 8 with its legs 10 and 11 additionally secures the connection of the walls in a force-fitting manner. This also ensures that the walls 2.1 to 2.4 are stabilized against fluttering.

At the front side of the air duct 1 there are four connecting flanges 14, 15, 16 and 17 with legs 14.1 and 14.2, 15.1 and 15.2, 16.1 and 16.2 and 17.1 and 17.2 which are each perpendicular to one another. The legs 14.1, 15.1, 16.1 and 17.1 are parallel to the channel axis K and are connected to the inner edge R of the walls 2.1, 2.2 2.3 and 2.4 gas-tight and pressure-tight by bonding with the adhesive KM1. In addition, these legs 14.1 to 17.1 are held by the fastening means 13 on the inner edge R frictionally. These fastening means 13, preferably blind rivets, can be sealed with a sealing layer VS of a 2-component epoxy resin coating. The sealing layer consists of a mixture of 1.0 to 70 wt .-% bisphenol A (epichlorohydrin) having an average molecular weight <700, 1.0 to 50 wt .-% bisphenol-F- (epichlorohydrin) with an average molecular weight <700, 0.1 to 10.0% by weight of epoxy resin (A / F) adduct with phenolic resin, 1.0 to 29.0% by weight of 6-hexanediol diglycidyl ether, 1.0 to 20.0 parts by weight. % p-tert-butylphenol glycidyl ether, 1.0 to 20.0% by weight

Polypropylene glycol diglycidyl ether, 5.0 to 70 wt .-% filler and 0.1 to 5.0 wt .-% additives as component A and as component B 1.0 to 29 wt .-% benzyl alcohol, 1.0 to 29.0 % By weight of isophoronediamine, 0.1 to 5.0% by weight of 3,6-diazaoctamethylenediamine, 0.1 to 5.0% by weight of 4,4'- Isopropylidenediphenol, 0.1 to 5.0 wt .-% 2-piperazi-l-ylethylamine, 0.1 to 5.0 wt .-% polyaminoamide, 0.1 to 5.0 wt .-% p-tert-butylphenol , 0.1 to 10.0% by weight of salicylic acid and 0.1 to 5.0% by weight of additives. The preferably has a layer thickness up to 400 m.

The projecting perpendicular to the channel axis K legs 14.2, 15.2, 16.2 and 17.2 are provided with holes 18 can be guided by the screw or locking means 19 to the connecting flanges 14, 15, 16 and 17 of a further air channel 21 to couple (see FIG. 4a and 4b).

In Fig. 2a is a section along the line A-A of Fig. 1 is shown. It can be seen that the joints 7 are each parallel to each other and extend coaxially to the channel axis K. The walls 2.1-2.4 all have an identical thickness D. In order to achieve a cuboid inner cross section of the air duct 1, for example, the walls 2.2 and 2.4 have a width B2.2 or B2.4, which is reduced by thickness D. The long leg 10 of the L-angle 9 covers the joint 7, wherein the joint 7 is arranged perpendicular to the leg 10 in each case. The introduced through the holes 12 fasteners 13 penetrate the outer glass fiber-reinforced cover layer 4 and go with the core 6 a positive connection.

As illustrated in FIG. 2b, however, the walls 2.1-2.4 can all also have an identical width. The butt joints 7 each take a vertical position to each other in this case.

Fig. 3 shows the side view of a section through the connecting flanges 14 and 16 along the line BB of Fig. 1. The legs 14.1 and 16.1 of Connecting flanges are attached to the inner cover layer 5 of the walls 2.1 and 2.3 by bonding with the adhesive KM1 gas and pressure-tight. In addition, the thighs

14.1 and 16.1 positively connected by introduced into holes 12 fasteners 13 with the core 6 of the walls. The fastening means 13 are covered by a sealing layer VS, so that flow losses at possibly protruding edges are largely excluded.

The attachment of the legs 15.1 and 17.1 of the connecting flanges 15 and 17 on the walls 2.2 and 2.4 corresponds to the attachment of the legs 14.1 and 16.1.

The vertically projecting legs 14.2, 15.2 (not shown),

16.2 and 17.2 (not shown) are held on the end face S of the respective wall 2.1 and 2.3 by bonding with the adhesive KM1 cohesively. In Fig. 4a, the permanent coupling of two air ducts 1 and 21 is shown. The vertically projecting legs 14.2 and 16.2 of the connecting flanges of the air duct 1 and the legs 14.2a and 16.2a of the connecting flange of the air channel 21 are provided with equally spaced holes 18, which occupy an aligned position to each other. The opposite legs 14.2 and 14.2a or 16.2 and 16.2a are arranged in abutment and form a gap 22. For coupling of the legs 14.2 and 14.2a or 16.2 or 16.2a, the adhesive KM2 is applied to the coupling surfaces KF and the coupling surfaces KF pressed through holes 18 corresponding to introduced screw or locking means 19, so that the adhesive KM2 in the joint 22 hardens and creates a permanent gas and pressure-tight connection between the connecting flanges.

The adhesive KM2 consists of a 2-component epoxy resin formulation containing a mixture of 1.0 to 70% by weight of bisphenol A (epichlorohydrin) having an average molecular weight <700, 1.0 to 50% by weight. Bisphenol F- (epichlorohydrin) having an average molecular weight <700, 0.1 to 10.0% by weight of epoxy resin (A / F) adduct with phenolic resin, 1.0 to 29.0% by weight of 6-hexane diol diglycidyl ether, 1.0 to 20.0% by weight of p-tert-butylphenol glycidyl ether, 1.0 to 20.0% by weight of polypropylene glycol diglycidyl ether, 5.0 to 70% by weight of filler and 0.1 to 5.0 % By weight of additives as component A and as component B 1.0 to 29% by weight of benzyl alcohol, 1.0 to 29.0% by weight of isophoronediamine, 0.1 to 5.0% by weight of 3.6 diazaoctamethylenediamine, 0.1 to 5.0% by weight of 4,4'-isopropylidenediphenol, 0.1 to 5.0% by weight of 2-piperazol-1-ylethylamine, 0.1 to 5.0% by weight. Polyaminoamide, 0.1 to 5.0 wt .-% p-tert-butylphenol, 0.1 to 10.0 wt .-% salicylic acid and 0.1 to 5.0 wt .-% additives.

Fig. 4b shows as an alternative a releasable coupling of two air channels 1 and 21. Instead of the adhesive KM2 is a rubber-elastic sealing means 23 for the positive connection between the legs 14.2 / 14.2a, 15.2 / 15.2a (not shown), 16.2 / 16.2 a and 17.2 / 17.2a (not shown) of the air ducts 1 and 21 to be coupled. The rubber-elastic seal is inserted between the legs and pressed by the screw or locking means 19 sealingly against the coupling surfaces KF. If the coupling is to be solved, only the screw or locking means 19 must be solved. The latching means 19 may be those as described in detail in EP 2 239 396 B1.

5 shows an example of a profile body 8, whose legs 10 and 11 are the same length. The parallel to the joint 7 of the abutting walls arranged leg 11 is connected to the outer cover layer 4 of the wall 2.1 / 2.2.2 and the other perpendicular to the joint 7 aligned leg 10 with the outer cover layer 4 of the other wall 2.2 / 2.4 respectively along the longitudinal sides LS glued and held by means of introduced into holes 12 of the legs 10 and 11 fasteners 13 on the respective wall. The length of the legs 10 and 11 is compared to the thickness D of the wall 2.1-2.4 m at least 40 mm larger, so that the joint 7 is securely covered by the perpendicular to the joint 7 leg 10 and for the fastener 13 is sufficient space.

Examples of the arrangement of the connection flanges 14, 15, 16 and 17 on the air duct are shown in FIGS. 6a and 6b.

6a shows that the legs 14.2, 15.2, 16.2 and 17.2 projecting perpendicularly to the channel axis K form a flange edge 24 interrupted at the corners, so that gaps 25 are created at the corners. These gaps 25 are covered by a cover and support plate 26, which is fastened by the adhesive KM2 and fastening means 13 on the surface facing away from the coupling surface KF of the legs 14.2, 15.2, 16.2 and 17.2 material and non-positively. The dimensions of the cover and support plate 26 are selected so that the gaps 25 completely covered and sufficient space for attachment is available. FIG. 6b shows a flange arrangement in which the legs 14.2, 15.2, 16.2 and 17.2 of the connecting flanges 14, 15, 16, 17 projecting perpendicularly to the channel axis K have a side length SL which is displaced by the leg width SB with respect to the channel axis K. is. Legs 14.2, 15.2, 16.2 and 17.2 are arranged with respect to one another in such a way that they form an outer circumferential flange edge 27 and respectively abutting legs a common joint 28. This gap 28 is covered by a cover and support plate 29 and by the adhesive KM2 and

Fastening means 13 on one of the coupling surface KF facing away from the surface of the leg material and non-positively attached.

Example 2

Fig. 7 shows another example of an air duct 1, the walls 2.1-2.4 of a matched to the settlement of the air duct 1 contiguous polypropylene sandwich panel 3 with glass fiber reinforced outer and inner cover layers 4 and 5 and a honeycomb core 6 and only a single profile body 8 is formed.

The sandwich panel 3 has three mutually spaced wall height WH openings 30 with miter faces GF, which include an opening angle of, for example, 45 ° to each other. The openings 30 are thereby introduced into the panel 3, that the outer glass fiber-reinforced cover layer 4 is maintained. In the openings 30, the adhesive KMl is introduced and the miter faces GF superimposed so that a hollow body 31 with perpendicular to each other arranged walls 2.1 / 2.2, 2.2 / 2.3, 2.3 / 2.4 and 2.4 / 2.1 forms, of which the wall 2.4 and the wall 2.1 come to lie on each other so that they form a horizontal or vertical joint 32 with each other. The abutting surfaces of the joint 32 are connected to the adhesive KMl cohesively gas- and pressure-tight. The gap 32 is then secured gas-tight and pressure-tight by the profile body 8 in the manner already described in Example 1 along the respective longitudinal sides LS of the walls 2.4 / 2.1.

[0035] List of Reference Numerals

Air duct 1

Walls of 1 2.1, 2.2, 2.3., 2.4

Sandwich panel 3

Outer cover layer of 3 4

Inner cover layer of 3 5

Core of 3 6

Joints 7

Profile body 8

L-angle 9

Isosceles angle 9a

Long leg of 9 10

Short leg of 9 11

Thighs of 9a 10a, IIa

Holes in 10, 11, 10a, IIa 12th

Fastening means 13

Connecting flanges of 1, 21 14, 15, 16, 17

Legs of 14-17 14.1, 14.2; 15.1, 15.2;

16.1, 16.2; 17,1, 17.2 14.1a, 15.1a, 16.1a, 17.1a 14.2a, 15.2a, 16.2a, 17.2a Drilling in 14.2-17.2 18

Screw or locking means 19

Connecting flanges of 21 20

Another air channel 21

Fugue between 14.2 / 14.2a

17.2 / 17.2a 22

Sealant 23

Broken flange edge 24

Gap 25

Cover and support plate 26

Flange edge 27

Fugue 28

Cover and support plate 29

Openings 30

Hollow body 31

Fugue 32

Width of the wall B2.2, B2.4

Thickness of the wall 2.1-2.4 D

Miter surface GF

Channel axis K

Coupling area KF

Adhesive KM1, K 2

Air duct outlet LA

Longitudinal side of the wall 2.1-2.4 LS

Front side of 2.1-2.4 S

Thigh width SB

Thigh length SL

Inner margin of 1, 21 R

Sealing layer VS

Wall height WH

For this 10 sheets of drawings

Claims

claims

1. Air duct for the removal or supply of gaseous media such as solvent contained air streams, with each other along the longitudinal edges joined together walls (2.1,2.2,2.3,2.4) made of plastic and respectively at the front ends (S) of the air duct (1) attached Connecting flanges (14,15,16,17) from a profile with each other at right angles bent legs

(14.1, 14.2, 15.1, 15.2, 16.1, 16.2, 17.12, 17.2), of which one leg (14.1, 15.1, 16.1, 17.1) is intended for connection to the inside edges of the walls (2.1, 2.2, 2.3., 2.4 ) of the air duct section (1) and the other, perpendicular to the channel axis (K) projecting legs (14.2,15.2,16.2,17.2) forms a coupling surface (KF) for connection to a leg of another air duct (21), tge characterized in that the walls (2.1,2.2,2.3,2.4) of a polypropylene sandwich panel (3) with glass fiber reinforced outer and inner cover layers (4,5) and a honeycomb-like core (6) and at least one profile body (8) are formed, which with a first adhesive (KM1) materially and positively connected joints (7) abutting walls (2.1, 2.2, 2.3.2.4) overlaps air duct outside and on the outer cover layers (4) with the adhesive (KM1) and additionally with fastening means (13) gas - And pressure-tight, and that the S limbs (14.1, 15.1, 16.1, 17.1) of the connecting flange (14, 15, 16, 17) on the inside edges of the walls (2.1, 2.2, 3.2, 4, 4) by material and force closure by means of the first adhesive (KM1) and Fastening means (13) are gas- and pressure-tight, and that the perpendicular to the channel axis (K) projecting leg (14.2.15.2,16.2,17.2) for gas and pressure-tight coupling to the vertically projecting leg of the other air channel (21) with a second adhesive (KM2) and screwing

(19) are non-releasably connected to one another or detachably connected to one another by means of a sealing means (23) and screwing or latching means (19).

2. Air duct according to claim 1, characterized in that the first adhesive (KM1) for the material connection of the joints (7) of the walls (2.1,2.2,2.3,2.4) with each other, the walls (2.1,2.2,2.3,2.4) with the Profile body (8) and the legs (14.1,15.1,16.1,17.1) of the connecting flange (14,15,16,17) with the walls (2.1,2.2,2.3,2.4) elastically toughened 1- or 2-component epoxy resin and / or polyurethane and / or polyurea formulations or mixtures / mixtures of these resin groups.

3. Air duct according to claim 1, characterized in that the fastening means (13) for the adhesion between the walls (2.1,2.2,2.3,2.4) and the profile body (8) or the walls (2.1,2.2,2.3,2.4) and Legs (14.1, 15.1, 16.1, 17.1) of the connecting flange (14, 15, 16, 17) Blind rivets are spaced from each other at regular intervals along the longitudinal sides (LS) or inside edge surfaces (RF) of the walls (2.1, 2.2, 2.3,2.4) are arranged and through bores (13) in the legs (10,11) of the profile body (8) or in the legs (14.1,15.1,16.1,17.19) of the connecting flange (14,15,16,17) are introduced vertically into the walls (2.1,2.2,2.3,2.4).

4. Air duct according to claim 1, characterized in that the second adhesive (KM2) for the material bond between the legs

(14.2,15.2,16.2,17.2) of the connecting flange (14,15,16,17) and the legs (14.2a, 15.2a, 16.2a, 17.2a) of the air duct (21) to be coupled, a 2-component epoxy resin formulation which is a mixture of 1.0 to 70 wt .-% bisphenol A (epichlorohydrin) with a middle

Molecular weight <700, 1.0 to 50% by weight of bisphenol F (epichlorohydrin) having an average molecular weight <700, 0.1 to 10.0% by weight of epoxy resin (A / F) adduct with phenolic resin, 1, 0 to 29.0 wt% of 6-hexane diol diglycidyl ether, 1.0 to 20.0 wt% of p-tert-butylphenol glycidyl ether, 1.0 to 20.0 wt% of polypropylene glycol diglycidyl ether, 5.0 to 70 % By weight of filler and 0.1 to 5.0% by weight of additives as component A and as component B 1.0 to 29% by weight of benzyl alcohol, 1.0 to 29.0% by weight of isophoronediamine, 0 , 1 to 5.0 wt .-% 3,6 diazaoctamethyleldiamin, 0.1 to 5.0 wt .-% 4,4 ^'- isopropylidenediphenol, 0.1 to 5.0 wt .-% 2-piperazi-l - ylethylamine, 0.1 to 5.0 wt .-% polyaminoamide, 0.1 to 5.0 wt .-% p-tert-butylphenol, 0.1 to 10.0 wt .-% salicylic acid and 0.1 to 5.0 wt .-% additives.

5. Air duct according to claim 1, dadurchgekennzeichne that the sealing means (23) for the positive connection between the legs (14.2,15.2,16.2,17.2) of the connecting flange (14,15,16,17) and the legs (14.2a, 15.2a , 16.2a, 17.2a) of the connecting flange of the air duct (21) to be coupled is a rubber-elastic seal between the legs

(14.2.15.2,16.2,17.2; 14.2,15.2,16.2,17.2) is inserted and is held by the force applied to the legs (14.2,15.2,16.2,17.2; 14.2,15.2,16.2,17.2) adhesion in the clamping state sealing.

6. Air duct according to claim 1, dadurchgekennzeichne that the frictional connection between the legs (14.2,15.2,16.2,17.2) of the connecting flange (14,15,16,17) and the legs (14.2a, 15.2a, 16.2a, 17.2a ) of the air duct 21) to be coupled is exerted in the holes (18) of the legs (14.2,15.2,16.2,17.2; (14.2a, 15.2a, 16.2a, 17.2a) introduced locking or screw means (19).

An air channel according to claim 1, characterized in that the fastening means (13) are sealed with a sealing layer (VS) of a 2-component epoxy coating comprising a mixture of 1.0 to 70% by weight bisphenol A- (epichlorohydrin) having an average molecular weight <700, 1.0 to 50% by weight bisphenol F (epichlorohydrin) having an average molecular weight <700, 0.1 to 10.0% by weight epoxy resin (A / F) adduct with phenolic resin, 1.0 to 29.0% by weight of 6-hexane diol diglycidyl ether, 1.0 to 20.0% by weight of p-tert-butylphenol glycidyl ether, 1.0 to 20.0% by weight of polypropylene glycol diglycidyl ether , 5.0 to 70 wt .-% filler and 0.1 to 5.0 wt .-% additives as component A and as component B 1.0 to 29 wt .-% benzyl alcohol, 1.0 to 29.0 wt % Of isophoronediamine, 0.1 to 5.0% by weight of 3,6-diazaoctamethylenediamine, 0.1 to 5.0% by weight of 4,4'-isopropylidenediphenol, 0.1 to 5.0% by weight. % 2-piperazin-1-ylethylamine, 0.1 to 5.0% by weight of polyaminoamide, 0.1 to 5.0% by weight of p-tert-butylphenol, 0.1 to 10, 0 wt .-% salicylic acid and 0.1 to 5.0 wt .-% additives.

8. Air duct according to claim 1, characterized in that the profile body (8) is an L-angle (9) whose short parallel to the joint (7) of the abutting walls (2.1,2.2; 2.2,2.3; 2.3,2.4; 2.1) arranged legs (11) with the outer cover layer (4) of a wall (2.1,2.3) and its long perpendicular to the joint (7) aligned leg (10) with the outer cover layer (4) of the other wall (2.2,2.4 ) glued respectively along the longitudinal sides (LS) and by means of which in bores (12) of the legs (10,11) introduced

Fixing means (13) on the respective wall (2.1,2.2,2.3,2.4) are held.

9. Air duct according to claim 1, dadurchgekennzeichne that the profile body (8) is an isosceles angle (9a), whose parallel to the joint (7) of the abutting walls (2.1,2.2; 2.) Arranged leg (IIa) with the outer cover layer (4) the one wall (2.1,2.3) and its other perpendicular to the joint (7) aligned leg (10a) with the outer cover layer (4) of the other wall (2.2,2.4) respectively along the longitudinal sides (LS) glued and by means through the holes (12) of the legs (10 a, II a) introduced

Fixing means (13) on the respective wall () are held, wherein the leg length (SL) of the legs (10a, IIa) over the thickness (D) of the wall (2.1,2.2,2.3,2.4) by at least 40 mm larger.

10. Air duct according to claim 1, characterized in that the perpendicular to the channel axis (K) projecting legs (14.2,15.2,16.2,17.2;

1 .2a, 15.2a, 16.2a, 17.2a) of the connecting flanges

(14,15,16,17) are arranged to each other so that they do not form a circumferential flange edge (24) around the air duct outlet (LA) and gaps (25), each of a to the dimension of the gap (25) adapted cover plate (25) 26) is covered by the adhesive (KM2) and fastening means (13) on a surface of the legs (14.2, 15.2, 16.2, 17.2, 14.2a, 15.2a, 16.2a, 17.2a) facing away from the coupling surface (KF). and frictionally attached.

11. Air duct according to claim 1, characterized in that the legs (14.2, 15.2, 16.2, 17.2, 14.2a, 15.2a, 16.2a, 17.2a) projecting perpendicular to the channel axis (K) of the connecting flanges

(14,15,16,17) in their leg length (SL) relative to the channel axis (K) eccentrically shifted by leg width (SB) are arranged so that they have an outer circumferential flange edge (27) and respectively abutting legs (14,2, 15.2, 15.2, 16.2, 16.2, 17.2, 17.2, 14.2) form a common joint (28) which is covered by a cover plate (29) which faces away from the coupling surface by the second adhesive (KM2) and fastening means (13) Surface of the thighs

(14.2, 15.2, 16.2, 17.2, 14.2a, 15.2a, 16.2a, 17.2a) is fastened material and non-positively.

12. Air duct according to one of claims 8 or 9, dadurchgekennzeichne that the bores (12) in the legs (10, 10 a, 11, II a) of the profile body (8) for receiving the fastening means (13) each along the longitudinal sides of the walls (2.1,2.2,2.3,2.4) and the bores (18) in the legs (14.2, 15.2, 16.2, 17.2; 14.2a, 15.2a, 16.2a, 17.2a) of

Connecting flange (14,15,16,17) are arranged evenly spaced.

13. Air duct according to one of claims 10 or 11, d a d u r c h e c e n e c i n e s that the

Cover plate (26,29) with holes (12) for receiving the fastening means (13) is provided.

14. The air duct according to claim 1, wherein the

Fastening means (13) and the locking or screw means (19) for the frictional connection between the walls (2.1 / 2.2, 2.2 / 2.3, 2.3 / 2.4, 2.4 / 2.1) and the profile body (8) or the walls (2.1,2.2 , 2,3,2,4) and legs (14.1,15.1,16.1,17.2) of the connecting flange (14,15,16,17) along the

Longitudinal sides (LS) of the walls (2.1,2.2,2.3,2.4) or the legs (14.2, 15.2, 16.2, 17.2; 14.2a, 15.2a, 16.2a, 17.2a) of the connecting flanges (14,15,16,17 ) are arranged evenly distributed.

15. Air duct according to one of claims 1 to 12, d a d u r c h e c e n e c e in that the profiled body (8) and / or the connecting flange (14,15,16,17) made of metal, preferably galvanized steel or structural steel, or of plastic.

16. Air duct according to claim 1, characterized in that the walls (2.1,2.2,2.3,2.4) are formed from a single panel (3), which has at least three openings (30) provided with miter areas (GF), wherein the openings (30) are arranged in the panel (3) so that the outer glass-fiber-reinforced covering layer (4) is preserved in that the openings (30) have a spacing adapted to the wall height (WH) of the air duct (1) and the miter areas (GF) are connected to one another in a material-locking manner by the adhesive (KM1) in such a way that there is a hollow body (31) with vertical walls (2.1,2.2,2.3,2.4) forms, of which a wall (2.1) with its end face (S) on the inner top surface (5) of the panel (3) forms a joint (32) through which with the adhesive ( KM1) and the fastening means (13) along the respective longitudinal sides (LS) of the walls (2.4 / 2.1) fabric and non-positively fastened profile body (8) is sealed gas and pressure tight.