FI76413C - Method for connecting rectangular ducts and ventilation machines and corresponding connection construction - Google Patents

Description

7641 3 "I Method of connection of rectangular duct and air-conditioning machines and corresponding connection structure Förfarande för förbindning av rektangulära kanaler and ventilationsmaskiner och motsvarande förbindningskonstruktion 5

The invention relates to a method of connecting rectangular ducts and / or air-conditioning machines, in which method the elements to be connected are joined by a strip comprising a seal for sealing the connection between the duct parts to be connected.

The connection methods currently in use require a separate connection processing for each channel end to be connected. The so-called IT list. Since the sheet metal parts of the ducts are usually delivered in 1x2 m sheets, the ducts are formed into pieces of approx. 2 m. In known methods, separate connection strips are attached to each end of the channel. The sealing strips are threaded into a groove in the strip or into a groove formed between the strip and the end of the duct. In this method, it is essential that the sealing takes place in the direction of the channel between the strips. The channels themselves are only ends up opposite. The actual connection takes place in the so-called. on a push list, which push list is pushed onto e.g. a pair of IT slats so that the bent edges 25 of the push list remain behind the edge of the IT list. The corners are set to the inner and outer corners to guide the seal. In the solution according to the level of the invention, the seals are adapted to seal against each other, and thus there is a possibility of air leakage, especially at the corners of the joint. This is especially the case if the edge markings of the ducts are made using scissors, as is the case with most sheet metal workshops. In this case, even small measurement errors cause large air leaks.

It is an object of the invention to provide a method of connecting rectangular ducts and / or air-conditioning machines in which the above-mentioned drawbacks can be avoided in a simple manner and in which it is possible to form a connecting structure by simple structural constructions. The object of the invention is in particular a connection structure which is suitable for connecting rectangular ducts 2 7641 3 1 and / or air-conditioning machines, the connection points of which are allowed to vary considerably in size.

It is also an object of the invention to provide such a connecting structure in which 5 such connecting strips are used, which form one compact unitary structure.

The method and connection structure according to the invention are mainly characterized by what is stated in the claims.

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The advantage of the method according to the invention is that only one type of compact strip is used on the sides of the channels. No actual preparatory work is required at the ends of the ducts. Therefore, separate work steps, such as the double installation of inner corners and seals for the IT list, are not required. These structures are already included in the list according to the invention. The percussion list required in the prior art also remains unnecessary in the method and lilt structure according to the invention.

In the method and lilt structure according to the invention, the outer corners correspond to 20 tightening angles.

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

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Figure 1 shows a list structure according to the invention from the side and in a cross-sectional view.

Figure 2 shows the angle-30 connection structure used in the method according to the invention.

Figure 3 shows the structure of Figure 2 taken along section line 1-1 of Figure 2. Figure 3 shows a piece of ball used in the joint, through which the joint screws can be passed crosswise.

Figure 1 shows a joint strip 10 according to the invention to be placed along the side surfaces of the rectangular elements to be joined. The joint 35 3 76413 1 10 comprises a skirting section 11 and an underlying skirting section 12. The skirting 11 is shaped in an A-shape, preferably wide in cross section. The edges 11b and 11b2 of the cover strip 11 have spaces 11b "for the seals 14a and 14b. Outside these spaces there is space for the holes 13 of the fasteners, preferably for the holes of the rivet. The outer bends 11c1 and 11c2 of the cover strip 11 form a funnel it is easier to place the edges of the duct elements and / or the joint of the product to be connected between the cover strip 11 and the underlying strip 12 below.

10 The material of the top strip is a relatively thick material and the strip bent in an A-shape is rigid. The riser strip 12 is of a thinner material and is shaped so that the central part 12a of the riser strip 12 runs along the inner surface 11 'of the cover strip 11 from the central area 11a of the cover strip 11. The edge portions 12b1 and 12b2 of the riser strip 12 are first bent as close to the center line x of the riser strip 12 as technically possible. The bending then extends on the portions 12b1 'and 12b2' towards the edges of the cover strip 11. This creates a gap between the strips 11 and 12 on both sides of the center line X, 20 of the strip 10. When the seals 14a, 14b are in place between the cover strip 11 and the post strip 12, the installation becomes tight, even if the dimensional accuracy of the duct is not good.

When installing the strip frame, the strips according to the invention are cut to the length of the sides of the channel 25 and holes 6-8 mm in diameter are drilled in the middle of the strip at a distance of about 10 mm from the ends of the strips. The stop 16a of the screw 17 of the corner pieces 15, i.e. the hook 16a of the hook nut 16, engages these holes. When screwing the screw 17 onto the screw hole 16b of its hook nut 16, the corner piece 15 is tightened against the end of the strip 10 and at the same time against the wall of the channel or other element to be connected.

If the corner piece is not used, the strip 10 can be cut out and bent at an angle of 45 °, whereby the corner is filled and sealed with putty.

The corner piece 15 shown in Fig. 2 is a strip bent at an angle of 90 °, which follows the shape of the slat strip 10. Thus, the appearance of the cross-sectional profile of the cover strip 11 of the strip 10 substantially corresponds to the inner strip shape of the corner piece 15 4 76413 1. The corner piece 15 fits over the cover strip 11 so wide that the sealing part 14a, 14b is covered. Inside the corner piece 15, a sealing rubber 20 (shown in Fig. 3) comes in. The screws 17 are arranged to pass through the corner piece 15 in both directions. crossfault. Quick locking methods such as wedge rivet or the like can also be used for fastening.

Because the molding is sturdy, various ceiling suspensions can be directly connected to it. In addition to hanging the corner pieces, holes are reserved for the large 10 channels and chamber walls in the moldings for pop rivets or other fasteners to ensure sloping traction.

In the method according to the invention, the ends of the channels to be connected or of the channel to be connected and the product are placed so that they are threaded into the gap 10 in the list 10 for them. The threading takes place as far as the ends of the channels in question go. Once the corner pieces have been tightened with their screws and, if necessary, the stability of the ducts at the holes in the moldings has been ensured with pop rivets or other connecting means, the connection is complete.

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Since the seals 14 in the strip 10 seal against the ducts to be connected at a distance of about 1-2 cm from the end of the duct and the corner pieces ensure the straightness and sealing of the corners, even 1 cm dimensional errors are not a disadvantage in the joint.

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Claims (10)

A method of joining rectangular ducts and / or ventilation machines, wherein the method of joining the elements is provided with a strip comprising a seal for sealing the joint between the duct portions to be joined, characterized in that such a joint strip (10) comprising an outer strip (11) and a reinforcing strip (12) connected stationary thereto at the central region of the outer strip (11), which are arranged to together form an interior and outer body, and the ends of the channels to be joined are arranged in the spaces (Aj and A ^) between them and in which the sealing process is carried out by means of sealing strips or equivalent arranged between the outer strip (11) and the channel part to be joined in the vicinity of the outer edge (11) edge portion. 15 Method according to claim 1, characterized in that the outer strip (11), the reinforcing strip (12) and the edge of the part to be joined between them are joined together by means of fastening means, advantageously rivets or the like. 20 A joint structure for use in the method according to claims 1 and 2, characterized in that the joint structure comprises a joint strip (10) which joins the two duct elements to be joined, which (10) comprises an outer strip (11) and a reinforcing strip (12). which joins this from the center region and that the molding structure comprises a space (A A and A)) between the outer strip (11) and the reinforcing strip (12) below it, in which space the edges of the channel elements or the corresponding to be joined can be placed below that the seal (14) is arranged to be positioned between the edge portion of the outer molding (11) and the duct element to be joined, whereby with the said joint, larger dimensional errors while allowing the edge of the channel element to be joined or correspondingly freely arranged at which heist location within the fairly wide space (A1 and A2). 35 7 641 3 1 A. Seam construction according to the preceding claim, characterized in that the cross sections of the outer strip (11) are essentially the shape of an A profile. 5. Joint structure according to any of the preceding claims 3 or A, characterized in that the reinforcing strip (12) is connected from the middle region (12a) to the middle region (11a) of the outer strip (11a), whereby in the construction between the outer strip (11) and in the reinforcing strip (12), two spaces (A och and A2) are formed on the respective strips on both sides of the central axis (X) of the strip (10), at which the ends of the channel elements or the corresponding to be connected can be arranged. 6. A joint structure according to the preceding claim, characterized in that the reinforcing strip (12) comprises on both sides of the central axis (X) strip parts (12b12b2) obliquely towards the central axis. 7. A joint construction according to the preceding claim, characterized in that the outer strip (11) comprises grooves (lib ") or the equivalent intended for the sealing means (IAa, IAb) at its outer edges. 8. Joint structure according to any of the preceding claims, characterized in that the joint structure comprises a corner piece (15), which corner section comprises moldings (15a, 15b) substantially at a 90 ° angle relative to each other, which moldings position from the ends. above the side strip (10) while the cross-sectional profile of the strip p in the corner piece (15) substantially corresponds to the outer cross-sectional shape of the outer strip (11) of the joint strip (10). A joint construction according to the preceding claim, characterized in that the corner piece (15) is connected to the joint (10) which follows the two straight side surfaces of the channel elements to be joined, advantageously by screws (17), the screw (17) is arranged at a counterpart (16) which is arranged in conjunction with the joint (10) which follows the sides of the channel elements and (16) attaches to it (10).