CZ2009335A3 - Clamp for connecting air-conditioning parts of pipes or ducts to each other, particularly for exhaustion, air conditioning and transport of air and other gases - Google Patents

Abstract

The clamp for interconnecting the air duct or duct part, in particular for suction, air conditioning and air and other gas transport, in which the ends of the connected duct or duct parts are provided with a flange (0) with a sealing mass (00), comprises a longitudinal body (1). The longitudinal body (1) is provided on each of its lateral sides with at least one curved claw (2) of a length less than the length of the longitudinal body (1), the claws (2) being arranged asymmetrically relative to the longitudinal axis (P) of the longitudinal body

Description

Clamp for connecting parts of ducts or ducts, in particular for the extraction, air conditioning and transport of air and other gases

Technical field

BACKGROUND OF THE INVENTION The invention relates to a clamp for interconnecting air duct or duct components, in particular for extracting, air conditioning and transporting air and other gases, wherein the ends of the duct or duct portions to be connected are provided with a sealant flange and the clamp comprises an elongate body. * ’;

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BACKGROUND OF THE INVENTION

A number of solutions are known for interconnecting air duct or duct components, in particular ducts or ducts for extracting, air conditioning and transporting air and other gases, wherein the ends of the duct or duct portions to be connected are provided with a flange to which sealant is applied.

A common feature of the known solutions is that the connection is realized by means of one or more terminals or by screw connections.

Fig. 1 shows a clamp formed by a longitudinal plate, both edges of which are bent in the same direction along the entire length of the clamp. One edge is bent (about 130 °) to hook beyond the flange projection and V.X X.

the other edge is bent straight through 90 °. In a 90 ° bent edge, a threaded through hole is provided in which a screw is screwed to tighten the flanges of the two parts to be joined together until the sealant is pressed between the flanges and the connection is made and sealed at the same time. The disadvantage of this embodiment, however, is that a pipe fitter who applies these clamps to the pipe components must simultaneously hold the clamp manually and screw in the screw until both flanges are required to approach. A further disadvantage is that it is difficult to ensure the same degree of tightening of the screw on all applied terminals in manual assembly. Another disadvantage of this

PV 2009-335

21.9.2009

PS3622CZ arrangement is related to the construction of flanges on connected parts of piping or duct, where # flanges are often made in the form of bent sheet with hollow spaces. In such a case, due to the substantially point pressure of the screw on the wall of the shaped flange, the flange parts deform, which can lead to the so-called roof-like joint shape, which causes uneven compression of the sealing element between the two flanges. requiring the use of an additional clamp at a smaller distance than would be possible with a joint without deformed flange walls. Another disadvantage is also the relatively long time required for the application of one clamp, which is particularly evident in places with poor or limited access to the flanges to be joined, for example where the joint is in close proximity to a building or other structure.

FIG. 2 illustrates a known embodiment in which a pair of flanges is used to connect a pair of flanges with a C-shaped profile (hereinafter referred to as C rail), which is longitudinally slid onto both flanges of the pipeline or duct to be joined. a sealing element which is clamped between the flanges by means of lateral pressure from the legs C of the bar. The distance between the curved legs C of the bar must be smaller than the distance of the lateral edges of the flanges to be joined with the uncompressed sealant so that only the fitting of the sealant will be compressed between the flanges. The disadvantage of this embodiment is that the installer of the pipe or duct must firstly hold the C rail manually and at the same time, manually hammer it against both flanges until the entire length of the C rail is pushed into the desired position. This application is physically demanding as the operator has to overcome the resistance caused by the compression of the sealant between the flanges and, in addition to the lengthening C-bar length already encountered on the flanges, also increases the friction between the C-bar and the flanges. On the one hand, this gradually requires the use of a greater and greater force to push the C bar onto the flanges, but the real risk of deformation of the C bar, especially its end, increases. Another disadvantage is the relatively long time required to place the C rail on the flanges.

PS3622CZ

PV 2009-335

21.9.2009

FIG. 3 shows a known embodiment in which a connecting rail with a C-shaped profile (hereinafter referred to as the O rail) is used to connect the pair of flanges. A sealing element is inserted between the flanges. The C strip in this solution is applied to the flanges by applying longitudinally to one flange, with one arm hooks along this flange along its entire length, whereupon the pressure from the top (manually, with a hammer, ...) clicks on the area of the other arm. a second arm (utilizing the elastic deformation of the second arm) behind the second flange, thereby fixing both flanges along the length C of the bar and also achieving the desired compression of the sealing element. Obviously, in this solution, the C-bar must have greater flexibility than in the embodiment of Fig. 2, where rather strut strength is required. The disadvantage of this solution is that the installer has to manually hold the C rail and at the same time manually apply the flanges by pressure from above until the entire length of the C rail is snapped onto the flanges into the desired position. Another disadvantage is the longer assembly time of the C rail when making long joints and also when making joints in places with limited access, eg in close proximity to a building or other structure. A further disadvantage of this C-rail design is the direction of force (transverse to the longitudinal direction of the pipe) required to snap the C-rail in particular by means of a hammer or mallet, which can lead to deformation of the entire pipe profile. A further disadvantage is that a roof-like shape of the C-rail profile is required, which is forced by the need for increased flexibility of the C-rail during assembly. Another disadvantage, also due to the need for greater flexibility of the C-strip according to this embodiment, is the need to use a thinner material for its manufacture than that used in the embodiment of Fig. 2, thereby also forcing the required C-strip length to maintain the strength characteristics of the joint.

Fig. 4 (U.S. Pat. No. 4,123,094) shows a known embodiment in which corner segments are used to connect the flanges of a pair of opposed pipes, which are inserted by their arms into the flange cavities and are provided with a through hole for the screw. By tightening the screw connection to each other, exerting pressure on the flanges towards each other via the arms of the corner segments, the sealing mass between the flanges is compressed and the desired flange connection is created. The installer must thus manually assemble the pipe ends together, insert the bolts, nuts and washers and then manually tighten the nuts.

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PS3622CZ

The disadvantage of this solution is that the worker must necessarily use both hands at the same time for all tasks, firstly to attach the fasteners and subsequently to screw the nut with both hands, with one hand holding the bolt with a wrench against turning and the other hand tightening the nut. Another disadvantage is also the real danger of uneven compression of corner segments by screw γ connection and uneven transfer of force to the flanges, resp. flange rails, whereby

V causes uneven compression of the sealing element and leaks, which must then be sealed manually with sealant. These operations disproportionately extend the time to connect the pipeline and increase the cost of assembly. Another disadvantage is also the long assembly time, especially in restricted access areas, where the pipe flange connection is in close proximity to the building or other structure.

The object of the invention is to eliminate or at least minimize the disadvantages of the prior art, in particular by providing a universally applicable, cheap, lightweight and simple clamp allowing easy, accurate, high-quality and fast assembly with uniform pressure distribution over the flange connection. assembly.

SUMMARY OF THE INVENTION

The object of the invention is achieved by a clamp for the interconnection of air duct parts or ducts, in particular for the suction, air-conditioning and transport of air and other gases, characterized in that the elongate body is provided with at least one curved tooth of less length on each side. than the length of the elongated body, the teeth being arranged asymmetrically with respect to the longitudinal axis of the elongated body.

The clamp according to the invention allows a quick and accurate connection and even pressure distribution on the flange connection of the individual parts of ducts and ducts. The clamp according to the invention reduces the complexity and time of assembly operations, reduces the number of types of parts needed to make the joint, reduces the volume and weight of the joint, does not violate the linearity and straightness of the gasket inserted between the flanges where it connects, allows deployment in any position, and

PV 2009-335

21.9.2009

PS3622CZ of space, its position on the joint can be changed at any time as needed, even after installation is complete. The clamp according to the invention further enables easy and quick installation even in an area where access is difficult due to adjacent building and other constructions, greatly reduces the weight of fasteners, reduces the cost of transporting fasteners to the assembly site, reduces the effort required for assembly and auxiliary tools assembly and reduces the cost of equipping the assembly workplace with assembly technology.

Preferred embodiments are the subject of the dependent claims and are described in more detail in the examples.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is schematically shown in the drawing, wherein FIG. 1 shows a cross-section of a first prior art solution; FIG. 2 a cross-section of a second prior art solution; FIG. 3 a cross-section of a third prior art solution; 5.0 to 5.3 separate views of the first embodiment of the clamp according to the invention, fig. 5.4 deployed clamp of figs. 5.0 to 5.3 (starting stock), figs. 5.00 to 5.02, location of the clamp according to figs. 5.0 to 5.3 Fig. 6.0 to 6.2 separate views of the corner design of the clamp according to the invention, Fig. 6.3 deployed clamp from Fig. 6.0 to 6.2 (starting stock), Fig. 6.00 to 6.02 positioning of the corner design of the clamp according to Figs. 6.0 to 6.2 in the realized corner joint of the flanges of the connected parts of the pipe or duct.

DETAILED DESCRIPTION OF THE INVENTION

The invention will be described with reference to exemplary embodiments of the clamp, and is not limited to the embodiments shown here, since it is readily modifiable by other skilled artisans to other specific designs.

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PS3622CZ

In the embodiment of Figs. 5.0 to 5.3, the clamp is formed by a longitudinal body 1, which is provided with a triple of curved teeth 2. The first two teeth 2.1, 2.2 are situated at a distance from one side of the longitudinal body 1 and the third tooth 23 is located on the other side of the elongated body 1 at a level between the first two teeth 2.1, 2.2. Preferably, the first two notches 2.1, 2.2 are situated at the ends of the longitudinal body 1. The teeth 2.1, 2.2, 2.3 are preferably linear in nature, meaning that they have a suitable length in the direction of the length of the longitudinal body 1. than the length of the longitudinal body L The teeth 2.1, 2.2, 2.3 are thus positioned asymmetrically with respect to the longitudinal axis P of the longitudinal body 1 As shown in Fig. 5.4, the clamp is formed by bending the flat blank of Fig. 5.4. the width X of the elongated body 1, i.e. the distance between the teeth 2.1, 2.2, 2.3 on both sides of the elongated body 1, corresponds to the width of the pair of flanges 0 to be pressed together with the sealant 00 pressed therebetween as shown in Fig. 5.00. The length Y of the terminal is basically selectable with regard to material consumption, strength requirements and possibly dimensional characteristics of realized joints.

As shown in Figures 5.02 and 5.01, the clamp is fitted to the flanges 0 to be joined by engaging the first flange 0 with the first tooth 2.1, followed by the second tooth 2.2 on the same side of the longitudinal body 1, and then the third tooth 2.3 situated on the flange. the opposite side of the elongated body 1 by rotating about the longitudinal axis of the elongated body 1 engages (using elastic deformation of the teeth 2.1, 2.2, 2.3) behind the second flange 0. This simultaneously pulls the two flanges 0 together and seals 00 between flanges 0 A simple one-hand tool (not shown) can be used for this clamp manipulation, in which the clamp is simply inserted and is moved in place with one hand on its flanges 0. The other clamp is applied to the flanges at a suitable distance. With this clamp it is possible to realize not only linear long joints but also circular joints, eg when connecting the end parts of two pipes or channels.

In the embodiment (not shown), the clamp is formed by a longitudinal body 1 which is provided with only a pair of curved teeth 2, one of which is situated on one side of the longitudinal body 1 (preferably on

PV 2009-335

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PS3622CZ (one end thereof) and the other tooth 2 are situated on the opposite side of the longitudinal body 1 (preferably at the other end of the longitudinal body 1), both teeth 2 being located asymmetrically with respect to the longitudinal axis P of the longitudinal body

Also, this clamp is formed by bending the flat blank and is placed in place on the flanges 0 in an equivalent manner to the clamp shown in Figures 5.0 to 5.3.

In the embodiment of Figs. 6.0 to 6.2, a clamp for making corner joints without screws is shown. The first tooth 2.1 is situated on one side of the longitudinal body 1 at the first end of the longitudinal body 1. In the direction of the longitudinal axis of the longitudinal body 1, it is opposite to the first tooth 2.1. a second tooth 2.2 is located on the side of the longitudinal body 1. At the other end of the elongated body 1, a third tooth 2.3 is situated in the direction transverse to the longitudinal axis P of the elongated body 1. The third bar 2.3 is preferably situated on the curved end portion of the flat element 1. The first two barbs 2.1 and 2.2 are preferably linear in nature, meaning that they have a suitable length in the length direction of the longitudinal body 1. The teeth 2 are located asymmetrically with respect to the longitudinal axis. P of the elongate body 1. As shown in Fig. 6.3, the clamp is formed by bending a flat blank. The width X of the elongated body 1, i.e. the distance between the teeth 2 on both lateral sides of the elongated body 1, corresponds to the width of the pair of flanges 0 to be pressed together with the sealant 00 pressed therebetween, as shown in Fig. 6.00. As shown in Figures 6.01 and 6.02, the clamp is fitted to the corner flanges 0 such that each flange 0 is provided with a corner segment 3 with a transverse through hole 30. A third tooth 2.3 is inserted into the through hole 30 of the corner segment 3, whereupon using the elastic deformation of the clamp, the first and second teeth 2.1, 2.2 engage behind the flanges 0. This pulls the two flanges 0 together and seals the sealing material 00 between the flanges 0. A mechanical bending of approx. . This squeezes the corner segments 3 and compresses the sealant 00. For this manipulation of the clamp, it is possible to use a simple one-hand tool (not shown), in which the clamp is simply inserted and is moved in place with one hand on the flanges.

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0. A clamp can be applied to the flanges 0 towards the next corner of the pipe to be connected, eg as shown in Fig. 5.0.

Industrial applicability

The invention is particularly useful in the assembly or manufacture of ducts and ducts used for ventilation or other gases.

' ¹ PV 2009-335 PS3622CZ 21.9.2009 9 • γν PATENT CLAIMS

Claims (5)

Clamp for interconnecting air duct or duct parts, in particular for extracting, air conditioning and transporting air and other gases, wherein the ends of the duct or duct parts to be connected are fitted with a flange (0) with sealant (00) and the clamp comprises a longitudinal body (1) ), characterized in that the longitudinal body (1) is provided on each side with at least one curved tooth (2) less than the length of the longitudinal body (1), the teeth (2) being arranged asymmetrically to the longitudinal axis (1). P) the elongated body (1). Clamp according to claim 1, characterized in that the longitudinal body (1) is provided with a triple bent tooth (2), the first two teeth (2.1, 2.2) being spaced apart on one side of the longitudinal body (1). ) and the third bar (2.3) is situated on the second side of the elongated body (1) at a level between the first two barbs (2.1,2.2). Clamp according to claim 2, characterized in that it is formed by a bent sheet. Clamp according to claim 1, characterized in that the longitudinal body (2) is provided with a triple bent tooth (2.1, 2.2, 2.3), the first tooth (2.1) being situated on one side of the longitudinal body (1) at the first end the second tooth (2.2) is situated on the opposite side of the longitudinal body (1), and at the other end of the longitudinal body, in the direction of the longitudinal axis (P) of the longitudinal body (1) at a distance from the first tooth (2.1). (1) a third tooth (2.3) is situated in a direction transverse to the longitudinal axis (P) of the longitudinal body (1). Clamp according to claim 4, characterized in that the third tooth (2.3) is situated on the bent end portion of the flat element (1).