ITGE20090063A1

ITGE20090063A1 - "JOINT FOR METALLIC PIPES FOR COMPRESSED AIR"

Info

Publication number: ITGE20090063A1
Application number: IT000063A
Authority: IT
Inventors: Acqua Mauro Dell
Original assignee: Valvon S R L
Priority date: 2009-08-12
Filing date: 2009-08-12
Publication date: 2011-02-13
Also published as: IT1395075B1

Description

DESCRIZIONE del brevetto per invenzione industriale avente per titolo: "Giunto per tubazioni metalliche per aria compressa" DESCRIPTION of the patent for industrial invention entitled: "Joint for metal pipes for compressed air"

TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION

La presente invenzione ha per oggetto i giunti per le tubazioni metalliche per aria compressa. The present invention relates to joints for metal pipes for compressed air.

La giunzione delle tubazioni metalliche per l'aria compressa presenta dei problemi di tenuta, stabilitÃ e resistenza a causa delle notevoli pressioni in gioco. The junction of the metallic pipes for compressed air presents problems of sealing, stability and resistance due to the considerable pressures involved.

La presente invenzione ha per oggetto un giunto per tali tubazioni che, pur essendo di facile installazione, garantisce la massima tenuta e resistenza nell'impianto. The present invention relates to a joint for such pipes which, although easy to install, guarantees maximum tightness and resistance in the system.

Secondo una caratteristica principale della presente invenzione, tale giunto comprende due gusci o manicotti semicilindrici delimitanti alle loro estremitÃ un foro di diametro eguale al diametro esterno delle tubazioni che si desidera giuntare, essendosi provvisti dei mezzi atti a determinare all'interno di detto manicotto una deformazione del diametro delle estremitÃ delle dette tubazioni tale da impedirne, per contrasto con una parte fissa del giunto, lo sfilamento dal giunto. According to a main feature of the present invention, this joint comprises two shells or semi-cylindrical sleeves delimiting at their ends a hole having a diameter equal to the external diameter of the pipes to be joined, the means being provided for causing a deformation inside said sleeve. the diameter of the ends of said pipes such as to prevent, by contrast with a fixed part of the joint, their slipping out of the joint.

Secondo una prima forma esecutiva della presente invenzione detti manicotti presentano in corrispondenza o in prossimitÃ dei loro fori di estremitÃ delle nervature anulari aventi un diametro interno leggermente minore del diametro esterno delle tubazioni dell' aria compressa, essendo nelle estremitÃ di tali tubazioni inserite delle bussole metalliche aventi un diametro esterno eguale al diametro interno di dette tubazioni, per cui serrando detti manicotti attorno alle tubazioni, si determina a monte di dette bussole metalliche una deformazione della tubazione stessa che, per contrasto con dette nervature, ne impedisce lo sfilamento dal giunto. According to a first embodiment of the present invention, said sleeves have annular ribs at or near their end holes having an internal diameter slightly smaller than the external diameter of the compressed air pipes, metal bushings being inserted in the ends of these pipes. having an external diameter equal to the internal diameter of said pipes, whereby by tightening said sleeves around the pipes, a deformation of the pipe is determined upstream of said metal bushings which, by contrast with said ribs, prevents it from slipping out of the joint.

Secondo una forma esecutiva alternativa della presente invenzione dette bussole metalliche hanno un diametro interno eguale al diametro interno delle tubazioni, e dette bussole vengono forzate nelle estremitÃ delle dette tubazioni metalliche mediante deformazione plastica di tali estremitÃ , con formazione di un gradino che, per contrasto con i fori di estremitÃ del giunto, impedisce lo sfilamento delle estremitÃ delle tubazioni dal giunto stesso. According to an alternative embodiment of the present invention, said metal bushings have an internal diameter equal to the internal diameter of the pipes, and said bushings are forced into the ends of said metal pipes by plastic deformation of these ends, with the formation of a step which, by contrast with the end holes of the joint, prevents the ends of the pipes from slipping out of the joint itself.

Ulteriori scopo e vantaggi della presente appariranno meglio nel corso della seguente descrizione particolareggiata di alcune forme esecutive della stessa, eseguita con riferimento al disegno allegato nel quale nella figura unica si Ã ̈ illustrato in sezione assiale un giunto secondo la presente invenzione attrezzato nella metÃ di sinistra secondo una prima forma esecutiva dell'invenzione, e nella metÃ di destra secondo una seconda forma esecutiva dell' invenzione. Further objects and advantages of the present invention will become clearer in the course of the following detailed description of some embodiments of the same, carried out with reference to the attached drawing in which in the single figure a joint according to the present invention equipped in the left half is shown in axial section. according to a first embodiment of the invention, and in the right half according to a second embodiment of the invention.

Con riferimento al disegno, il giunto illustrato comprende un robusto manicotto metallico 1 composto da due elementi semicilindrici, che vengono uniti fra di loro mediante delle viti 2 o altro idoneo elemento di serraggio. With reference to the drawing, the illustrated joint comprises a sturdy metal sleeve 1 composed of two semi-cylindrical elements, which are joined together by means of screws 2 or other suitable clamping element.

Il manicotto 1 presenta alle due estremitÃ un foro 3, 3' di diametro corrispondente al diametro esterno dei tubi 4, 4'. Il manicotto 1 presenta al suo interno un vano cilindrico 5 di diametro maggiore di quello dei tubi 4, 4' provvisto centralmente di un ringrosso anulare 6. Con 7 si Ã ̈ indicato un manicotto cilindrico avente un diametro interno eguale al diametro esterno delle estremitÃ 104, 104' dei tubi 4 alloggiati all'interno del giunto 1. Detto manicotto 7 presenta centralmente al suo interno un ringrosso anulare 8 di diametro interno eguale al diametro interno delle estremitÃ 104, 104' dei tubi 4, 4' ed Ã ̈ provvisto esternamente di una gola cilindrica centrale 9 atta a innestarsi sul ringrosso anulare 6 del manicotto 1. Il manicotto 7 presenta in estremitÃ degli alloggiamenti per degli O-ring lO, che vengono mantenuti a posto dagli anelli ferma guarnizioni Il. The sleeve 1 has at its two ends a hole 3, 3 'with a diameter corresponding to the external diameter of the tubes 4, 4'. The sleeve 1 has inside it a cylindrical compartment 5 with a diameter greater than that of the tubes 4, 4 'provided in the center with an annular slub 6. 7 indicates a cylindrical sleeve having an internal diameter equal to the external diameter of the ends 104 , 104 'of the tubes 4 housed inside the joint 1. Said sleeve 7 has an annular bulge 8 centrally inside it with an internal diameter equal to the internal diameter of the ends 104, 104' of the tubes 4, 4 'and is externally provided of a central cylindrical groove 9 suitable for engaging on the annular slub 6 of the sleeve 1. The sleeve 7 has at the ends of the housings for O-rings 10, which are held in place by the sealing rings 11.

Con particolare riferimento ora alla forma esecutiva illustrata sulla metÃ di sinistra di figura 1, fra l'estremitÃ del manicotto 7 e la corrispondente estremitÃ del manicotto 1 Ã ̈ attestato un anello spaccato 12 provvisto di un dente o risalto anulare 13 avente un diametro esterno leggermente maggiore del diametro esterno del tubo 4. Con il manicotto 1 allargato, mediante opportuno svitamento delle viti 2, si preparano le estremitÃ dei tubi 4 inserendovi una bussola 14 di metallo, e per esempio di acciaio, avente un diametro esterno eguale al diametro interno del tubo 4, ed una altezza corrispondente alla distanza che intercorre dalla estremitÃ della nervatura 8 sino in prossimitÃ al risalto anulare 13. Una volta equipaggiate le estremitÃ dei tubi 4 con le bussole 14, e dopo averle fatte attestare contro la nervatura contraIe 8, si procede al serraggio dei due semi-gusci 1 mediante serraggIO delle viti 2. Questa operazIOne determina la deformazione del tratto corrispondente di tubo 4 da parte della nervatura 13, per cui il tubo 4 sarÃ impedito dal fuoriuscire dal giunto 1, dal momento che viene a battuta contro il dente 13. With particular reference now to the embodiment illustrated on the left half of Figure 1, between the end of the sleeve 7 and the corresponding end of the sleeve 1 there is a split ring 12 provided with a tooth or annular projection 13 having an external diameter slightly greater than the external diameter of the pipe 4. With the sleeve 1 enlarged, by appropriately unscrewing the screws 2, the ends of the pipes 4 are prepared by inserting a bushing 14 of metal, and for example of steel, having an external diameter equal to the internal diameter of the tube 4, and a height corresponding to the distance from the end of the rib 8 up to the annular projection 13. Once the ends of the tubes 4 have been equipped with the bushings 14, and after having made them abut against the contracted rib 8, proceed to the tightening of the two half-shells 1 by tightening the screws 2. This operation determines the deformation of the corresponding section of tube 4 by the rib 13, so that the tube 4 will be prevented from coming out of the joint 1, since it abuts against the tooth 13.

Con riferimento ora alla forma esecutiva illustrata nella metÃ di destra della figura 1, nelle estremitÃ da giuntare dei tubi 4' vengono inserite delle bussole metalliche 14' aventi un diametro interno eguale al diametro interno dei tubi 4', e dette bussole vengono forzate nelle estremitÃ dei detti tubi metallici 4' mediante deformazione plastica di tali estremitÃ , con formazione fra l'estremitÃ della bussola 14' e la tubatura 4'di un gradino che viene a battuta contro l'anello spaccato 13'e che impedisce in questo modo lo sfilamento delle estremitÃ dei tubi del manicotto 1, dopo serraggio delle viti 2. Grazie a questa forma esecutiva di giunto si garantisce la continuitÃ della sezione della tubatura. With reference now to the embodiment illustrated in the right half of Figure 1, metal bushings 14 'having an internal diameter equal to the internal diameter of the tubes 4' are inserted in the ends to be joined of the tubes 4 ', and said bushings are forced into the ends of said metal pipes 4 'by plastic deformation of these ends, with the formation between the end of the bush 14' and the pipe 4 'of a step which abuts against the split ring 13' and thus prevents the slipping of the ends of the pipes of the sleeve 1, after tightening the screws 2. Thanks to this embodiment of the joint, the continuity of the pipe section is guaranteed.

Naturalmente, la presente invenzione non Ã ̈ limitata alle forme esecutive illustrate e descritte. CosÃŒ, ad esempio, per quanto le nervature 13 sia stata illustrata come formata su un anello spaccato 12, essa puÃ² parimenti essere ricavata sull'imboccatura del manicotto 1. Of course, the present invention is not limited to the illustrated and described embodiments. Thus, for example, although the ribs 13 has been illustrated as being formed on a split ring 12, it can likewise be obtained on the mouth of the sleeve 1.

Per quanto si riferisce al tubi 4 e 4' , questi sono normalmente fatti di alluminio, per quanto qualsiasi altro metallo adatto puÃ² essere utilizzato. As far as tubes 4 and 4 'are concerned, these are normally made of aluminum, although any other suitable metal can be used.

Pertanto la presente invenzione non Ã ̈ limitata alle forme esecutive illustrate e descritte, ma comprende tutte quelle varianti e modifiche esecutive rientranti nell'ambito piÃ¹ vasto del concetto inventivo, sostanzialmente come a seguito rivendicato. Therefore the present invention is not limited to the illustrated and described embodiments, but includes all those variants and executive modifications falling within the broader scope of the inventive concept, substantially as claimed hereinafter.

Claims

CLAIMS 1) Joint for compressed metal pipes characterized by the fact that it includes two shells or semi-cylindrical sleeves (1) delimiting at their ends a hole (3, 3 ') with a diameter equal to the external diameter of the pipes (4, 4') that is desired joining, having provided means (13, 14 ') suitable to cause inside said sleeve a deformation of the diameter of the ends of said pipes with the formation of a step which abuts against a part (13, 13') of the sleeve in such a way as to prevent the slipping of said pipes (4,4 ') from the sleeve itself.

2) Joint according to claim 1, characterized in that said sleeves (1) have annular ribs (13) having an internal diameter slightly smaller than the external diameter of the pipes (4) of the compressed air, metal bushings (14) having an external diameter equal to the internal diameter of said pipes (4) being inserted in the ends of these pipes (4), so by tightening said sleeves (1) around the pipes (4), upstream of said metal bushings (14) it causes a deformation of the pipe itself which, coming to abut against said ribs (13), prevents it from slipping out of the joint (1).

3) Joint according to claim 1, characterized by the fact that said metal bushings (14 ') have an internal diameter equal to the internal diameter of the pipes, said bushings (14') being forced into the ends of said metal pipes by plastic deformation of these ends , with the formation of a step which, coming to abut against the edge of the hole (3 ') of the sleeve (1) or against a part (13') associated with this hole (3 '), prevents the ends of the pipes (4') from slipping off ) from the joint (1) itself.

4) Joint according to claims 1 to 3, characterized by the fact that it comprises a sturdy metal sleeve (1) composed of two semi-cylindrical elements, which are joined together by means of screws (2) or other suitable clamping element, said sleeve ( 1) presenting at its two ends a hole (3, 3 ') with a diameter corresponding to the external diameter of the pipes (4, 4') and being provided inside with a cylindrical compartment (5) with a diameter greater than that of the pipes ( 4, 4 ') centrally provided with an annular slub or rib (6).

5) Joint according to claim 4, characterized in that it further comprises a cylindrical sleeve (7) having an internal diameter equal to the external diameter of the ends (104, 104 ') of the tubes (4, 4') housed inside the joint (1), the sleeve (7) being centrally provided with an annular bulge (8) with an internal diameter equal to the internal diameter of the ends (104, 104 ') of the tubes (4, 4') and being further externally provided with a central cylindrical groove (9) able to engage on the annular slub (6) of the sleeve (1) 6) Joint according to claim 5, in which the sleeve (7) has at the ends of the housings for O-rings (10), which are held in place by suitable sealing rings (11). 7) Joint according to claims 1 and 3 characterized by the fact that metal bushings (14 ') having an internal diameter equal to the internal diameter of the tubes (4') are inserted in the ends to be joined of the tubes (4 '), being said bushings ( 14 ') forced into the ends of said metal pipes (4') by plastic deformation of these ends, with the formation between the end of the bush (14 ') and the pipe (4') of a step which abuts against the split ring (13 ') and which thus prevents the ends of the tubes (4') of the sleeve (l) from slipping out, after tightening the screws (2). 8) Joint according to any one of the preceding claims, substantially as illustrated, described and for the purposes set out above.