FR2895056A1

FR2895056A1 - Bent hose type device for e.g. urban bus, has stainless steel piece bent at ninety degrees with radius of curvature of fifty millimeters, and two portions of straight plastic hoses that are produced and fitted on steel piece

Info

Publication number: FR2895056A1
Application number: FR0513206A
Authority: FR
Inventors: Mathieu Laupretre; Fabien Sikirdji
Original assignee: OPTYM HA SARL
Current assignee: OPTYM HA SARL
Priority date: 2005-12-19
Filing date: 2005-12-19
Publication date: 2007-06-22

Abstract

The device has a 304L stainless steel piece with outer diameter of 51 millimeters, thickness of 1.2 millimeters and bent at 90 degrees with a radius of curvature of 50 millimeters. The piece has ends that are rectilinear on a length of 15 millimeters and terminated by a stop bead that is fabricated by hot spinning. Two portions of straight plastic hoses of inner diameter of 50 millimeters are produced and fitted on the stainless steel piece.

Description

La presente invention concerne un systeme assurant la circulation duThe present invention relates to a system ensuring the circulation of the

liquide de refroidissement entre les differents elements des moteurs de vehicules industriels et plus particulierement des bus urbains. Le circuit de refroidissement est traditio.nnellement effectue a l'aide de durites en matiere plastique (silicone, caoutchouc...) emmanchees sur les differentes pieces des moteurs et fixees a 1'aide de colliers de serrage. La pression et la temperature exercees sur ces durites sont de plus en plus importantes dans les moteurs des bus urbains modernes (augmentation du poids, diminution du volume, utilisation de turbos, augmentation de la frequentation...). Cela a pour consequence d'augmenter le taux de rechange des durites actuelles et particulierement des durites de 50 mm de diametre interieur, coudee A. 90 . Le dispositif selon l'invention permet de. remedier a cet inconvenient. 11 .comporte en effet selon une premiere caracteristique, une piece en acier inox 304L de diametre exterieur de 51 mm et d'epaisseur 1,2 mm, coudee a 90 avec un rayon de courbure de 50 mm. Chaque extremite est rectiligne sur une longueur de 15 mm et se termine par un bourrelet de butee realise par repoussage a chaud. Deux portions de durites plastiques droites de diametre interieur 50 mm seront debitees et emmanchees de force sur le coude acier. Des colliers de serrage viendront en butee contre les bourrelets afin de rigidifier 1'ensemble. Le systeme sera alors install& en lieu et place des durites en matiere plastique coudees a 90 a 1'aide de deux autres colliers de serrage. Le systeme permet alors d'obtenir une durite tres solide resistant aux agressions (pression, chaleur, acidite) mais demeurant souple et flexible afin de s'adapter a 1'environnement des moteurs (grander vibrations). L'installation est facile et ne demande aucune modification de piece moteur. coolant between the various elements of the engines of industrial vehicles and more particularly urban buses. The cooling circuit is traditionally carried out using plastic hoses (silicone, rubber, etc.) fitted to the different engine parts and fastened using clamps. The pressure and the temperature exerted on these hoses are more and more important in the engines of the modern urban buses (increase of the weight, decrease of the volume, use of turbos, increase of the frequentation ...). This has the consequence of increasing the replacement rate of the current hoses and particularly the hoses of 50 mm internal diameter, elbow A. 90. The device according to the invention makes it possible. remedy this inconvenient. 11 .comporte in effect according to a first feature, a piece 304L stainless steel outer diameter of 51 mm and thickness 1.2 mm, bent at 90 with a radius of curvature of 50 mm. Each end is straight over a length of 15 mm and ends with a bump made by hot repoussage. Two portions of straight plastic hoses with a diameter of 50 mm will be debited and forced into the steel elbow. Clamps will come into contact with the beads to stiffen the assembly. The system will then be installed in place of the plastic hoses bent at 90 with two other clamps. The system then makes it possible to obtain a very strong hose resistant to the aggressions (pressure, heat, acidity) but remaining flexible and flexible in order to adapt to the environment of the engines (to increase vibrations). Installation is easy and does not require any modification of the engine.

Les dessins annexes illustrent l'invention : le dispositif comporte une piece en acier inox 304L de diametre exterieur de 51 mm et d'epaisseur 1,2 mm, coudee a 90 avec un rayon de courbure de 50 mm, ayant chaque extremite rectiligne sur une longueur de 15 mm et se terminant par un bourrelet de but&e realise par repoussage a chaud ( Figure 1 et Photo 1). Deux portions de durites plastiques droites de diametre interieur 50 mm seront debitees et emmanchees de force sur le coude acier (Figure 2 û Repere 2). Des colliers de serrage viennent en butee contre les bourrelets afin de rigidifier 1'ensemble. Le systeme sera alors install& en lieu et place des durites en matiere plastique coudees A. 90 a 1'aide de deux autres colliers de serrage (Figure 2 - Repere 3 et Photo 2). The accompanying drawings illustrate the invention: the device comprises a 304L stainless steel piece with an outside diameter of 51 mm and a thickness of 1.2 mm, bent at 90 with a radius of curvature of 50 mm, each having a rectilinear end on a length 15 mm and ending with a goal bead made by hot spinning (Figure 1 and Photo 1). Two portions of straight plastic hoses with a diameter of 50 mm will be debited and forced into the steel elbow (Figure 2 - Item 2). Clamps abut the beads to stiffen the assembly. The system will then be installed in place of the plastic hoses bent A. 90 with the aid of two other clamps (Figure 2 - Mark 3 and Photo 2).

Claims

1) Device of the type bent hose to ensure the circulation of the coolant of the urban bis engines characterized in that it comprises a steel piece (Item 1) resistant to temperature, pressure, acidity, and to the vibrations, constituting the elbow, to which two portions of straight hoses are connected.

2) Device according to claim 1 characterized in that the steel piece has at each end a rectilinear portion of 15 mm ending in bead flanges made by hot repelling and thus allowing the good fixing clamps clamps.

3) Device according to claim 1 characterized in that the steel piece is a 90 elbow tube with a radius of curvature of 50 mm, an outside diameter of 51 mm and a thickness of 1.2 mm. This is to ensure the strength and minimize the location required for the piece.

4) Device according to rune any of the preceding claims characterized by the force-fitting to the ends of the steel piece of two sleeves, debits to the desired length in the plastic hose of inner diameter 50 mm. The device is then connected to the various elements of the engine and fixed by fitting and clamps (mark 3). This is to provide flexibility for vibration damping.