FR2732092A1 - Connection end piece for plumbing of domestic metal water piping in large apartment blocks - Google Patents

Abstract

The connecting end piece designed to be fitted onto a pipe is characterised in that it consists of a collar (2) made up of an internal tube (3) hollowed out and a collar (6) extending in a radial projection in relation to the internal tube. It contains a single sleeve (9) in a rubberised material which is fixed to the internal tube (3) and is designed to be placed on the exterior of the free end (8) of this tube (3). A reaction piece (20) engages on the outside of the internal tube (3) and overlaps the sleeve (9) in a manner that it is held on the inside of the reaction piece (20) to enable them to cooperate by contact with each other.

Description

NOZZLE DZ RACCORDEKBWT NOISE NOZZLE FOR PIPE ZT
XOMTAGZ PROCEDB
The invention relates to an anti-noise connection end piece for rigid and metallic pipe such as copper for example.

 In the general field of plumbing and transport of running water, various types of metal pipes are already used (sanitary installation, heating, ...). The general problem which arises in these applications is to be able to connect the free end of a pipe to the rest of the installation, in particular to another pipe or to a water supply or to another plumbing device. It is therefore necessary to provide the free end of this pipe with a connection endpiece compatible with the rest of the installation and providing a tight connection. Furthermore, given the fact that the majority of the applications of such pipes are domestic applications, it is desirable that these connection end pieces can be mounted easily, without requiring any special tool and are also removable.

 There are already known connection end pieces intended for such rigid and metallic pipes.

 Thus, for example, a connection end piece of this type comprises a collar piece forming an internal tube intended to be introduced at the free end of the pipe and a clamp or sleeve intended to be placed outside said end. free of the pipe to clamp it against the internal tube of the collar piece. A rotary female nut is mounted floating against the collar and is held against this collar by the collar or sleeve. In this way, such a connection piece requires a special tool for its assembly. It is therefore relatively difficult to implement. In addition, the installation of such connection nipples generally generates metallic noises when hot or cold water passes, taking into account the metallic parts constituting it. This kind of disadvantage is aggravated when the plumbing installation includes a large number connection tips as is the case in large buildings and we then observe an echo phenomenon.

 The invention therefore aims to remedy the aforementioned drawbacks of the prior art and relates to a connecting piece for a pipe which can be easily mounted without requiring a special tool, and which also acts as a sound barrier. thus isolating it from the rest of the installation (tap, cold water, hot water meter, ...).

 Another object of the invention is to provide such a connection nozzle which can be used at high temperature (hot water or heating) while retaining its sealing and reliability characteristics.

 Simultaneously, the connecting piece according to the invention must ensure perfect sealing in a reliable and lasting manner and be as low as possible cost price.

 To this end, the invention relates to a connection end piece intended to be mounted on a pipe, characterized in that it comprises a collar part formed by a hollow internal tube and by a collar projecting radially by relative to the internal tube, at least one ring made of plastic, in particular rubber, integral with the internal tube and intended to be placed outside the free end of the internal tube, and a counter-piece engaging the outside of the internal tube by overlapping the ring so that the internal bearing of said counterpart cooperates by contact with the ring. The internal tube comprises at its free end at least one shoulder whose external surface constitutes a bearing for the ring so as to increase the contact surface between said ring and said internal tube.

 According to the invention, the ring is in the form of a closed cylindrical sleeve and comprises at least one cylindrical receiving groove for the bearing formed by the external surface of the shoulder, the depth of said groove being substantially equal to the external diameter of said bearing. . In a preferred embodiment, the ring has a cross section along a radial plane substantially in the form of C or E.

 According to the invention, the counterpart conforms, in part, to the shape of the ring and has a smooth internal cylindrical bearing, the internal diameter of which is greater than the external diameter De of the external surface of the counterpart or of the external wall of the inner tube.

 The invention also relates to a method for mounting such a connection end piece, characterized in that the rotary nut floating mounted against the collet piece is screwed around the end of a pipe, the counter-engagement is engaged. piece outside the inner tube and the ring, and the seat is folded inward by crimping, so as to leave between the internal cylindrical seat and the outer wall of the inner tube a space E1.

 The invention also relates to a connection end piece and to a method of mounting such a connection end piece comprising in combination all or part of the characteristics mentioned above or described below.

Other characteristics and advantages of the invention will appear on reading the following description which refers to the appended figures which represent a preferred embodiment of the invention and in which
Figure 1 is an axial sectional view of a connecting piece according to the invention, in the installed position.

Figure 2 is an axial sectional view of a connecting piece according to the invention, in the initial position, that is to say before its installation
Figure 3 is a partial view, in cross section, of a first embodiment of a connecting piece according to the invention;
Figure 4 is a partial view, in cross section, of a second embodiment of a connecting piece according to the invention.

 Figure 5 is a partial view, in axial section, of another embodiment of a connecting piece according to the invention.

 The connecting piece 1 according to the invention is intended to be mounted on a pipe, a tap or at the outlet of a hot water, cold water meter. Such an end piece 1 allows the connection of said pipe (or of said tap) to a corresponding end piece of another part of the installation to be connected, said pipe (or tap) and said corresponding end piece not forming an integral part of the present invention. .

 The connecting piece 1 according to the invention is essentially in two parts. The first part comprises in particular a rotary nut 4 mounted floating against a collar 6 of a collar part 2 comprising at one of its ends 8 a ring 9. The second part comprises in particular a counter-part 20.

 The connecting piece 1 according to the invention comprises a collar part 2 forming an internal tube 3 intended on the one hand to support a ring 9 and on the other hand to serve as a connecting element between the rotary nut 4 and the counterpart 20. The collar part 2 is therefore formed of a hollow internal tube 5 and of a collar 6 projecting radially from the internal tube 3, outside this tube 3.

 The connection end piece 1 according to the invention also comprises a rotary nut 4 comprising a female connection thread 13 and engaging outside the collar 6 of the collar part 2 against which it is mounted floating. Such a rotary nut 4 allows the connection of the nozzle to another part of the installation to which the nozzle 1 according to the invention must be connected.

 The internal tube 3 has at its free end 8 at least one shoulder 7, the external surface 10 of which constitutes a bearing surface for the ring 9 so as to increase the contact surface between said ring 9 and said internal tube 3. The internal tube 3 can be provided with a single shoulder (case of FIG. 1) or with several shoulders, in particular two offset and axially spaced from one another (case of FIG. 5). According to the invention, this shoulder 7 is generally cylindrical of revolution and of constant diameter (case of FIG. 3) or generally oval or elliptical of revolution (case of FIG. 4).

 The connection end piece 1 according to the invention also comprises a ring 9 formed from a material making it possible to provide acoustic insulation and having a certain elasticity and a shear strength.

This ring 9 can thus be made of plastic, in particular rubber and / or a material promoting sliding - in particular a fluorocarbon polymer -.

 With reference to FIG. 3, the insulation ring 9 is in the form of a generally cylindrical sleeve of revolution, closed and of constant diameter. Thus, the insulation ring 9 is not split.

 According to the invention, the surface 10 of the shoulder 7 of the internal tube 3 extends with respect to at least one cylindrical portion 11 of the ring 9. The ring 9 thus comprises at least one cylindrical groove 12 for receiving this bearing surface 10. Its depth is substantially equal to the external diameter of the bearing surface 10. In other words, the insulation ring 9 has a transverse cross section along a substantially C-shaped radial plane in the case where it follows the shape of a single shoulder 7 of the inner tube 3 (Figure 1). The core of the C then cooperates by contact with the shoulder 7 and its wings cooperate by contact with the parts of the internal tube 3 extending on either side of said shoulder 7. In another embodiment, the ring d insulation 9 has a cross section along an E-shaped radial plane when said ring 9 follows the shape of two shoulders 7 of the inner tube 3 (Figure 5). The souls of the E then cooperate by contact with said shoulders, its central wing cooperating by contact with the part of the internal tube 3 disposed between the two shoulders 7, its two external wings cooperating by contact with parts of the internal tube 3 located on either side on the other side of the assembly constituted by the two shoulders 7. Thus, the rigid internal tube 3 of the collar part 2 also comprising the shoulder 7 forms a counterpart to the insulation ring 9.

 With reference to FIG. 4, the internal surface of the ring 9 follows the shape of the shoulder 7, its external surface cooperating by contact with the internal surface of the counterpiece 20.

 Advantageously, the ring 9 is fixed to the bearing surface 10 and to the external wall 15 of the internal tube 3 by bonding, vulcanization or the like.

 The outer surface of the insulation ring 9 is smooth and generally cylindrical of revolution, and cooperates with a cylindrical bearing surface 21, smooth, internal of the counterpiece 20. Advantageously, the outer surface of the ring 9 is fixed to the scope 21 by bonding, vulcanization or equivalent. Likewise, the outer surface 14 of the collar 2 is smooth and cylindrical in revolution and cooperates by contact with the inner surface of the rotary nut 4.

 According to the invention, the counter-piece 20 engages outside the internal tube 3 by overlapping the ring 9 so that the internal surface 21 of said counter-piece 20 cooperates by contact with the ring 9.

 According to the invention, a part of the counterpiece 20 follows the shape of the ring 9 and comprises, in its other part, an external thread 26. In other words, the insulating ring 9 secured to the shoulder 7 of the tube internal 3 is trapped between the external wall 15 of the internal tube 3 and the counterpiece 20, when the end piece 1 according to the invention is in the installed position. To do this, the counterpiece 20 has a smooth internal cylindrical surface 25 coming opposite the external wall 15 of the internal tube 3. The internal diameter of this surface 25 is greater than the external diameter De of the external surface 22 of the counter -piece 20 or even is greater than the outer diameter of the outer wall 15 of the inner tube 3.

In other words, the counterpiece 20 is mounted on the internal tube 3 comprising the insulation ring 9 so as to leave between the cylindrical surface 25 and the external wall 15 of the internal tube 3 an axial and radial space El. Likewise, still during the mounting of the counter-piece 20 on the inner tube 3, the free end 8 of said inner tube 3 is left spaced from the counter-piece 20 by a distance E2. This avoids contact between the counterpiece 20 and the inner tube 3 of the connection piece 1 according to the invention.

 Starting from the bearing surface 25 of the counterpiece 20, the latter comprises a first bearing surface 27 forming substantially a right angle with said bearing surface 25 and covering the right side (with reference to FIG. 1) of the insulation ring 9. The counterpiece 20 also includes the bearing surface 21 extending from the first bearing surface 27 and forming a substantially right angle with the latter.

This bearing surface 21 comes to cooperate by contact with the external surface of the insulation ring 9 and connects the first bearing surface 27 to a second bearing surface 28 with which it also forms a substantially right angle. This second bearing 28 is extended at right angles by the part of the counterpart 20 comprising an external thread 26.

 The internal diameter of the counterpiece 20 is advantageously substantially equal to the internal diameter of the internal tube 3.

 The invention also relates to a method of mounting a connecting piece 1 according to the invention. This process can be described with particular reference to FIG. 2 which illustrates a connection end piece 1 according to the invention in its initial position, that is to say before its installation.

This process is characterized in that the rotary nut 4 mounted floating floating against the neck piece 2 around the end of a pipe or equivalent (tap, etc.). The collar part 2 has at its end the insulation ring 9. Then, the counter-piece 20 is engaged outside the internal tube 3 and outside the ring 9 and the seat 25 is folded towards the 'interior (in the direction of the arrows illustrated in Figure 2), in particular by crimping, so as to leave between the inner cylindrical surface 25 and the outer wall 15 of the inner tube 3 a space El.

 The invention is applicable in particular in sanitary or domestic heating installations for connecting cold or hot water pipes or heating pipes.

Claims (19)

REVBNDICATIOB8  1. Connection end piece intended to be mounted on a pipe, characterized in that it comprises a collar part (2) formed by an internal hollow tube (3) and a collar (6) projecting radially with respect to the internal tube (3), at least one ring (9) made of plastic, in particular rubber, integral with the internal tube (3) and intended to be placed outside the free end (8) of the tube internal (3), and a counter-piece (20) engaging outside the internal tube (3) overlapping the ring (9) so that the internal bearing (21) of said counter-piece (20) cooperates by contact with the ring (9).  2. End piece according to claim 1, characterized in that said internal tube (3) comprises towards its free end (8) at least one shoulder (7) whose external surface (10) constitutes a bearing surface (10) for the ring ( 9) so as to increase the contact surface between said ring (9) and said internal tube (3).  3. End piece according to one of claims 1 or 2, characterized in that the shoulder (7) is generally cylindrical of revolution and of constant diameter.  4. End piece according to one of claims 1 to 3, characterized in that the bearing surface (10) extends with regard to at least one cylindrical portion (11) of the ring (9)  5. End piece according to one of claims 1 to 4, characterized in that the ring (9) comprises at least one groove (12) cylindrical for receiving for the bearing surface (10), the depth of said groove (12) being substantially equal to the outer diameter of the seat (10).  6. End piece according to any one of claims 1 to 5, characterized in that the ring (9) is in the form of a closed cylindrical sleeve.  7. End piece according to claim 1 or 2, characterized in that the shoulder (7) is generally oval or elliptical in revolution.  8. End piece according to claim 7, characterized in that the inner surface of the ring (9) follows the shape of the shoulder (7), its outer surface cooperating by contact with the inner surface of the counterpiece (20) .  9. End piece according to one of claims 1 to 8, characterized in that the ring (9) has a cross section along a radial plane substantially in the form of C or E.  10. End piece according to one of claims 1 to 9, characterized in that the ring (9) is made integral with the bearing surface (10) and the wall (15) of the outer inner tube (3) by bonding, vulcanization or equivalent.  11. End piece according to one of claims 1 to 10, characterized in that the ring (9) is made integral with the counter-piece (20) by bonding, vulcanization or equivalent.  12. End piece according to one of claims 1 to 11, characterized in that a part of the counterpiece (20) follows the shape of the ring (9).  13. End piece according to one of claims 1 to 12, characterized in that the counter-piece (20) has a smooth internal cylindrical surface (25) whose internal diameter is greater than the external diameter De of the external surface (22) of the counterpiece (20) or of the external wall (15) of the internal tube (3).  14. End piece according to one of claims 1 to 13, characterized in that the inside diameter of the counterpart (20) is substantially equal to the inside diameter of the inner tube (3).  15. End piece according to one of claims 1 to 14, characterized in that the free end (8) of the internal tube is spaced from the counter-piece (20) by a distance E2.  16. End piece according to one of claims 1 to 15, characterized in that it is mounted so as to avoid contact between the counterpiece (20) and the internal tube (3).  17. End piece according to one of claims 1 to 16, characterized in that the counterpiece (20) has an external thread 26.  18. End piece according to claims 1 to 17, characterized in that it comprises a rotary nut (4) mounted floating against the collar (6) of the collar part (2).  19. A method of mounting a connecting piece according to any one of claims 1 to 18, characterized in that one screws the rotary nut (4) mounted floating against the neck piece (2) around the end of a pipe, the counterpart (20) is engaged outside the internal tube (3) and the ring (9), and the bearing surface (25) is folded inwards, in particular by crimping, so as to leave between the internal cylindrical surface (25) and the external wall (15) of the internal tube (3) a space E1.