CH356965A - Device for sealing a fluid distribution installation element and use of this device for sealing a tap - Google Patents

Description

Device for sealing an element of a fluid distribution installation and use of this device for sealing a valve. , comprising a female element with a conical flare into which a male part of the element engages, characterized in that this part of the male element is made of plastic material and has the shape of a collar forming a circular sealing strip, the first free edge comes into contact with the wall of the flare and is deformed by curvature under the action of the axial tightening of the device, so that the tightness results both from the actual tensioning of the flange and from the action of pressure called to reign Jans. installation.

Another object of the invention is a use of this device as a sealing device for a valve, the body of which constitutes a female element in which there slides with sealing an obturator member presenting the said part of the male element.

The appended drawing shows, by way of example, two embodiments of the sealing device, each having variants.

fig. 1 is a half-view in longitudinal section of a first form of execution applied to the connection of two pipes, each of which has one of its ends fixed by gluing inside the pipes of each of the elements of the frame.

fig. 2 is a similar view of an alternative embodiment, applied to the connection of two pipes whose ends are glued to the outside of the pipes of the armature elements.

fig. 3 is a partial view in longitudinal section, of another embodiment variant applied to a connection with a reduction piece.

fig. 4 is a view in axial section of a junction valve for distribution in flexible pipes, with the second embodiment of the sealing device.

Figs. 5 and 6 are similar views of variants respectively of a straight tap and an angle tap for distribution in fixed pipes, each comprising a variant execution of the sealing device.

The embodiment of the sealing device of FIG. 1 comprises a female 616ment 1 which presents, on the side assembling with a part of a 61st male ment 2, a development of its central channel, in the shape of a bowl, with its frustoconical surface 3 against which comes its apply the edge 41 of the sealing collar 4 of the male element 2, to the tightening of the screwing sleeve 6. This collar 4 presents, before assembly and tightening of the connection, the shape indicated in the lower half-view of fig. 3, the outside diameter of the collar being less than the inside diameter of the end 5 of the female element. When the coupling is tightened, the flange 4 is applied with a certain elastic tension against the surface 3, and its bevelled end 41 forms a genuine sealing layer, the action of which will be reinforced by the pressure of the fluid called upon to reign. Jans 1st fitting. To allow the assembly of the male 2 and female 1 616ments of this connection, a screwing sleeve 6 is provided, screwing externally on the female 1'élement and adopts the base 61 comes to rest against a circular shoulder 7 of 1 male element 2, while coming to surround the first body of this element with a 16ger play B. The sleeve 6 is knurled on the outside at 9, so as to allow the first screwing ais6 by hand, because it is indeed possible to communicate manual - ment to the collar, the tension realizing its tight application. The edge of the chamfered end 5 of the female element 1 is provided to come into abutment against the front face of the shoulder 7 of the male element, for the suitable position of the flange 4 against its bearing surface 3 , this arrangement making it possible to prevent any over-tightening and guaranteeing very simply that the desired tightness is obtained in the best conditions of support for the collar. The male and female 61ements of this device for connecting two pipes 10 and 11, present here two pipes 12, 13 receiving one end of these pipes fixed by gluing. Circular grooves 14 are provided in these pipes, in which the adhesive will form, after hardening, as many collars preventing the tearing of the pipes. The presence of the sleeve 6, independent of the male element 2, makes the connection of the pipes easily removable.

fig. 2 shows a variant with fixing of the pipes by gluing, these then engaging on the pipes of the connector, fluted on the outside for the same reasons as those indicated above.

fig. 3 shows a second variant in a fitting comprising a reduction piece. Ort sees that the female element 1 of the connector, analogous to the previous ones, receives the male part of the reduction piece 19, which has a collar 4 and is assembled with the element 1 under the same conditions as those indicated for the first fitting in fig. 1, if it is that the screw sleeve 6 forms a body with the part 19. This part 19 also has a reduced female part 20, which is other than the replica of the female element 1, and thus allows the constitution of the reduction with a pipe not represented, according to one or the other of the connection modes previously described (fig. 1 or 2).

0n has represented in fig. 4 a second particularly interesting embodiment of the sealing device in an in-line valve, variable in length. 0n sees at 41 the first valve body whose inlet connection orifice 42, being fixed on a pipe, for example by screwing, is extended by a tapered expansion 43. This valve body has at 44 a cylindrical bore Jans Iequel can slide the obturator member 45, whose circular sealing lip 46 cooperates with the frustoconical surface 43. The obturator member 45 slides tightly in the bore 44, thanks here to a 61astic O-ring 47. The axial displacement of RTI ID="0002.0277" WI="5" HE="4" LX="467" LY="2265"> this obturator organ is obtained using a knurled nut 48 screwing onto the extremity threaded nut 49 of the valve body, this nut having for this purpose a collar 50, interposed between a shoulder 51 of the shutter member and a ring 52, here fitted onto the latter by elastic deformation and retained Jans the circular groove 53 0n thus congoit that by screwing the nut, an can bring into contact with the frustoconical surface 43 the lip 46 of the shutter member, and easily communicate to it a slight deformation in curvature, visible in the figure, to obtain 1 ' tightness of the valve under the conditions defined above. It will be noted that any excess tightening when the valve is closed is also avoided by the fact that the collar of the nut is provided to come into abutment against the body of the valve when the obturator member is inserted correctly. In this example the shutter member 45 has at 54 a connection orifice for a receiving pipe, this orifice communicating via the side passages 55 with the capacity 56 existing in the valve body around the front end of the valve member. shutter which passes through it freely. By unscrewing the nut 48, the obturator member moves back and, when the lip of the latter ceases to be in contact with the frustoconical surface 43, the fluid admitted, following the arrow 57, enters the capacity 56. and, from thence, to the pipe connected at 54, through passages 55. The length of the valve is therefore variable between the inlet and outlet connections, which is permissible if the pipe connected at 54, at least , is a flexible pipe. It will also be noted the existence of an orifice 58 on the nut 48, this orifice being intended to make it possible to ensure the presence of the fluid in the pipe before total unscrewing of the nut, which is possible because the sliding part of the obturator member leaves the bore 44 beforehand to be placed in the flared part 59 of the body. of faucet.

fig. 5 shows a variant application of the device to a straight tap in a fixed installation. The valve body 41 itself presents the inlet 60 and outlet 61 connection orifices, the latter being in permanent communication with the capacity 56 which surrounds the front part of the obturator member 45, which ensures 1 tightness and is operated as indicated above.

In a fixed pipe installation, an angle valve is frequently used to avoid the use of an elbow joint, and fig. 6 shows a second variant of application of the sealing device to a valve, the body 41 of which carries the inlet 60 and outlet 61 orifices.

Claims (2)

CLAIMS I. Sealing device for a fluid distribution installation element comprising a female 61st element with a conical flare in which a part of the male 616ment engages, characterized in that this part of The male element is made of plastic and has the shape of a flange forming a circular sealing lip, the free edge of which comes into contact with the wall of the flare and is deformed by curvature under the action of the axial tightening of the device. , so that the tightness results both from the proper tensioning of the collar and from the action of the pressure required to prevail in the installation. 1I. Use of the device according to claim 1, as a sealing device for a valve, the body of which constitutes the female element in which slides with sealing a shutter member presenting the said part of the male element. SUB-CLAIMS 1. Sealing device according to claim I, characterized in that it comprises two cooperating stops limiting the axial bringing together between the part of the male element and the female element. 2. Use according to claim II, as a sealing device for a valve dopt the obturator member has a passage (54) formed behind said flange and constituting an outlet orifice.