Abrégé

The invention relates to a metal bellows (10), comprising a bellows wall (16), which extends around a longitudinal axis (12) and encloses a bellows interior (14), the bellows wall (16) having inner folds (18) and outer folds (20), which are connected to each other by means of wall flanks (22). Said metal bellows is designed and developed in such a way, with a view to the economical production of a sufficiently durable and deformable metal bellows, that the inner folds (18) and/or the outer folds (20) are formed in such a way that said folds each enclose an annular space (24, 25). The invention further relates to a method for producing a metal bellows (10).

Classes IPC  ?

• F16J 3/04 - Soufflets
• B21D 15/10 - Opérations permettant d'obtenir des tubes à surface ondulée les ondulations étant faites dans le sens transversal, p. ex. helicoïdalement en appliquant une pression de fluide

Abrégé

The invention relates to a device (2) for producing a flexible coiled tube (10) which can be flexibly elongated to a limited degree and which is made of a continuously supplied strip of a flat metal material, comprising a roll-bending and winding unit (4) to which the strip is supplied and where the strip is brought to an approximately S-shaped or Z-shaped form when viewed transversely to the strip longitudinal direction and wound in a helical manner, thereby forming an undercut that acts in an axial direction (6), wherein a coiled tube (10) is produced which can be moved out of the roll-bending and winding unit (4). The device also comprises a joining and separating unit (12) with a joining and separating station (15) which can be moved in a manner approximately corresponding to the advancing speed and where the coiled tube (10) is cut to length into longitudinal sections (38) of a specified length, and flat material regions which come to rest one over the other at opposite longitudinal end regions (40) of the longitudinal sections (38) are joined in a bonded manner. The device is characterized in that a clamping unit (16) is provided which rotationally fixes the coiled tube (10) continuously being moved out of the roll-bending and winding unit (4) and in this state can be moved away from the roll-bending and winding unit (4) in a rotationally drivable manner approximately at the same rotational speed as the coiled tube (10) moving out of the roll-bending and winding unit and at approximately the same advancing speed as the coiled tube so that the coiled tube is driven in a defined rotating and advancing manner in the region of the joining and separating unit (12), and immediately after running against an end stop (20) in the joining and separating unit (12), a defined length of the coiled tube (10) can be obtained without torsion and clearance between the end stop (20) and the joining and separating station (15).

Classes IPC  ?

• B21C 37/12 - Fabrication de tubes ou de tuyaux métalliques à jonction hélicoïdale

Abrégé

The invention relates to a profiled clamp (1) for connecting components such as pipes (18), comprising a clamp body (4) consisting of at least two segments (6), which are formed in the shape of a partial ring, and comprising a clamping means (5). The segments (6) have a center web (8) and, on both sides thereof, a leg (9) directed radially inward, each leg having an integrally formed groove-shaped end segment (10) pointing away from the web (8) in the axial direction. Furthermore, the clamping means (5) lies in the groove-shaped end segments (10) at least in some segments.

Classes IPC  ?

• F16L 23/06 - Raccords à brides les brides étant raccordées par des organes tendus dans le plan radial raccordées par leviers à mouvement de rotule
• F16L 23/08 - Raccords à brides les brides étant raccordées par des organes tendus dans le plan radial raccordées par broche et écrou fileté disposés tangentiellement

Abrégé

The invention relates to a method for producing a thermally-insulated coiled hose (7), in which a metal coiled hose (7) that was initially produced in a conventional manner is compressed such that the coils thereof lie against each other and adjacent axial wall regions (7.1) of individual coils thus form at least one non-interrupted lateral wall surface. A ceramic-based coating (8) is subsequently applied to said at least one non-interrupted lateral wall surface, and cured, and the coiled hose (7) formed in this manner is then withdrawn wherein adjacent axial wall regions (7.1) of adjacent coils detach from one another and the coating is interrupted at separation points (8.1). The invention also relates to a coiled hose.

Classes IPC  ?

• B21C 37/12 - Fabrication de tubes ou de tuyaux métalliques à jonction hélicoïdale
• F16L 11/16 - Manches, c.-à-d. tuyaux flexibles en un matériau rigide, p. ex. en métal ou en matériaux plastiques durs faites d'enroulements de bandes ou de lanières profilées

Abrégé

The invention relates to a method for producing a heat insulated decoupling element (1) and to such a decoupling element, wherein the heat insulation (8) is provided along the wave band of the bellows. The heat insulation consists of a coating that comprises heat insulating granulate. Thus, the mobility of the bellows is still provided after attaching the heat insulation.

Classes IPC  ?

• F01N 13/18 - Structure facilitant la fabrication, l'assemblage ou le démontage

Abrégé

The invention relates to a device for the purification of particle-laden gases, having a bellows (2) and having at least one filter element (4, 4a) which is arranged in the bellows (2). To ensure effective filtering without restriction of the mobility of the bellows (2), the invention provides that at least one filter element (4, 4a) is fixed in a positively locking manner to a bellows inner rim (2.1) of a corrugation of the bellows.

Classes IPC  ?

• F01N 13/18 - Structure facilitant la fabrication, l'assemblage ou le démontage
• F01N 3/021 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de filtres
• F01N 3/022 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de filtres caractérisés par une structure filtrante spécialement adaptée, p. ex. en nid d'abeilles, à mailles ou fibreuse

Abrégé

Proposed is a decoupling element, in particular for exhaust lines of internal combustion engines in motor vehicles, having a bellows and having a heat insulation material, wherein the heat insulation material is formed by annular segments or the heat insulation material is formed by a helically wound strip with segments formed by individual windings. Here, the segments overlap in the direction of the axis of the bellows.

Classes IPC  ?

• F01N 13/18 - Structure facilitant la fabrication, l'assemblage ou le démontage
• F01N 13/14 - Silencieux ou dispositifs d'échappement caractérisés par les aspects de structure comportant une isolation thermique

Abrégé

The invention relates to a decoupling element, in particular for exhaust gas systems, for use with an injection device (14) for injecting a reductant, such as urea, comprising a corrugated metal bellows (7) and a flow-conducting element (9, 23) arranged inside the bellows (7). The outer diameter (D1) of the flow-conducting element is smaller than the inner diameter (D2) of the bellows (7). According to the invention, the flow-conducting element (9, 23) divides the interior of the bellows (7) into an inner core flow path for a core flow (16) of the exhaust gas flow and an outer jacket flow path for a jacket flow (17) of the exhaust gas flow. The invention further relates to a method, by means of which exhaust gas flowing in an exhaust gas flow flows through a flow-conducting element arranged at a final radial distance inside the bellows, said exhaust gas being divided into a core flow and a jacket flow, whereby the wetting of the bellows and thus the deposition of urea inside the bellows corrugations are avoided.

Classes IPC  ?

• F01N 13/18 - Structure facilitant la fabrication, l'assemblage ou le démontage
• F01N 13/08 - Autres aménagements ou adaptations des tubulures d'échappement
• F01N 3/28 - Structure des réacteurs catalytiques

Abrégé

The invention relates to a flexible pipe element (1), in particular for exhaust gas pipes of internal combustion engines in motor vehicles, comprising a thread-like or corrugated sheathing (2) provided with cylindrical connection ends (3), and further comprising a longitudinal support in the form of a metal braided and/or knitted hose (4) which is disposed coaxially outside of the sheathing and fixed to the connection ends. The aim of the invention is to provide a cost-effective design for the longitudinal support of the pipe element which in the case of a traction stop has a smoothly increasing spring characteristic and does not expose the edge corrugations of the sheathing to any detrimental effects of forces originating from the casing. The aim is achieved according to the invention in that a respective annular flexible buffer element (6) is disposed between the end half-corrugations (5) of the sheathing and the angle rings (7) placed on the end of the sheathing such that the deflection of the braided and/or knitted hose from the level of the outside diameter of the sheathing to the level of the cylindrical end of the sheathing is supported exclusively by the buffer element.

Classes IPC  ?

• F01N 13/18 - Structure facilitant la fabrication, l'assemblage ou le démontage
• F16L 27/11 - Raccords réglablesRaccords permettant un déplacement des parties raccordées comportant uniquement une connexion flexible les extrémités des tuyaux étant assemblées au moyen d'un manchon flexible le manchon ayant la forme d'un soufflet avec des ondulations multiples

Abrégé

The invention relates to a method for producing a heat exchanger. According to said method, at least one plate (5) for dissipating heat is inserted between two neighbouring corrugations (4) of the corrugated body (3) and the corrugations are pressed together in such a way that the inserted plate is braced in a positive and non-positive fit between the corrugations. The invention also relates to a heat exchanger of this type for cooling fluids, said exchanger comprising a tube (2) that is partially designed as a corrugated tube and has at least one plate for dissipating heat that is braced between two corrugations of the corrugated body.

Classes IPC  ?

• F28F 1/08 - Éléments tubulaires gaufrés ou ondulés longitudinalement
• F28F 1/12 - Éléments tubulaires ou leurs ensembles avec moyens pour augmenter la surface de transfert de chaleur, p. ex. avec des ailettes, avec des saillies, avec des évidements ces moyens étant uniquement à l'extérieur de l'élément tubulaire
• F28F 1/24 - Éléments tubulaires ou leurs ensembles avec moyens pour augmenter la surface de transfert de chaleur, p. ex. avec des ailettes, avec des saillies, avec des évidements ces moyens étant uniquement à l'extérieur de l'élément tubulaire et s'étendant transversalement

Abrégé

The invention relates to a flexible line element (1), in particular for exhaust gas lines from internal combustion engines in motor vehicles, comprising a bellows (2), at least one additional element (3) that coaxially adjoins the bellows, in particular a metal mesh tube or a metal fabric tube and/or a coiled tube, such as a strip-wound tube, which lies within the bellows (2). A damping element made of metal wool lies between the bellows (2) and the additional element (3), said damping element consisting of a spirally coiled strip of metal wool. The subject matter of the invention enables a flexible parameterization of the damping characteristic while simultaneously reducing the range of variation with a simplified assembly.

Classes IPC  ?

• F01N 13/18 - Structure facilitant la fabrication, l'assemblage ou le démontage
• F01N 13/14 - Silencieux ou dispositifs d'échappement caractérisés par les aspects de structure comportant une isolation thermique
• F01N 1/24 - Silencieux caractérisés par leur principe de fonctionnement par utilisation des matériaux absorbant le son
• F16L 51/02 - Compensation de la dilatation dans les canalisations utilisant un soufflet ou un tube dilatable en accordéon ou ondulé
• F16L 55/033 - Absorbeurs de bruit