FR2528943A1 - INTERLOCKING ASSEMBLY - Google Patents

Abstract

THE INVENTION CONCERNS A PACKING ASSEMBLY, IN PARTICULAR FOR PLASTIC PIPING, COMPRISING A PACKAGE RECEIVING THE END OF THE PIPING AND A STOP RING 26 WHICH MAINTAIN THE LATTER IN THE PACKING POSITION, AS WELL AS ONE SUPPORT FOR THE END OF THE PIPING AND THE STOP RING 26, THE CASING CONSISTING OF A HAT SCREW 5 AND THE SUPPORT FOR THE END OF THE PIPE 14 AND THE STOP RING 26 BY A REMOVABLE STOP RING 15 , 16, 25, ATTACHED TO THE END OF THE HAT SCREW 5.

Description

Interlocking assembly.

  The present invention relates to an interlocking assembly, for plastic pipes in particular, composed of a shoemaker receiving the end of the pipe and a stop ring which keeps the latter in the fitted position, as well as support for the end of the piping and

the stop ring.

  Known devices of this type are for example used to connect compressed air lines to tanks

  under pressure, valve bodies or others In these assemblies

  interlocking fittings and / or fittings, the end of the tu-

  yauterie is directly embedded then fixed in the assembly

  blocking with a stop ring, one or more of which

  peripheral edges sink into the wall of the tube The ex-

  end of the pipe is pushed against a stop provided in the assembly and fixed by the stop ring, an external conical face of which coincides with an internal conical face of the case, so that an axial pull is pressed

  automatically the ring in a wall of the tube-, thus main-

  held An O-ring, provided above the stop ring,

  ensures the tightness of the end of the tube in the assembly.

  The disadvantage of assemblies of this type lies in the fact that it is essential to provide a special internal profile of the housing-receiving the end of the piping, in order to constitute a support for the latter and for the stop ring.

  Outside the bootmakers, to which the plumbing piping-

  tick must be connected, interlocking assemblies of this type have a size in relative length-

important.

  The present invention aims to improve an assembly of the type described above, so as to give it a reduced overall length and so that its production allows direct fitting, in the body of the case, of the piping.

plastic to be connected.

  According to an essential characteristic of the invention, the bowl

  tier is represented by a cap screw, the support of the ex-

  end of the tube and of the stop ring being constituted by a removable stop ring, fixed to the end of the screw

  hat This configuration specific to the invention allows

  puts in the bootmaker, insofar as it receives the end of the

  tube and stop ring, to be entirely constituted by the cap screw, the rod of which can be integrally screwed into a valve body or a pressure tank by

  example, thus forming only a minimal external projection.

  This measure therefore eliminates the traditional and in-

  dispensable adapter, and not having to modify the threaded hole already provided in the valve body, another advantage of

  the present invention Other a-van-

  taggers of the invention are given in the sub-claims

tions.

  The present invention will be better understood using the examples

  construction ples illustrated on the attached drawings, which represent:

  Figure 1: a cross section of a first form of cons-

  truction of the assembly according to the invention, with the end of the tube fitted, 3- Figure 2: a second form of construction of the assembly according to the invention, with the end of the tube fitted. Interlocking connections in accordance with this in-

  vention, such as the model in Figure 1, are for example-

  screwed into the connection pipe 1 of a tank, pressure tank according to DIN 74281 in particular, of which

  the single wall 2 is partially shown.

  welded servers are for example mounted on vehicles equipped with compressed air braking systems The connection pipe 1, of circular section, is welded in an opening 3 of the wall 2 (weld bead 4) It

  has in particular a minimum length of 12 mm and a ta-

  line of M 22 x 1.5 This tubing 1 is already in

  protrusion, it is desirable to use an assembly that does not form

  mant that a minimum projection Such an assembly has a cap screw 5, composed of a head 7 and clamping faces

  8, as well as a rod 6 extending downwards the head 7.

  The rod 6 of the cap screw 5, provided with an external thread 9, is screwed into a thread 10 of the pipe 1, so as to tighten the head 7 of the screw 5 against a stop ring and / or gasket. seal 11, copper for example, no leakage

  under pressure is thus only possible outwards by the assembly

  screwed block The sealing ring 11 is embedded on the annular shoulder 12 of the rod 6, below which a

clearance 13 can be provided.

  The end of a plastic pipe 14 is fitted into the cap screw 5 serving as a housing, a support tube 15, inserted in this same end, having an annular shoulder 16 external to the latter and serving to support

  the front end of the piping.

  The cap screw 5 has a bore 17, the diameter of which corresponds to the external diameter of the piping 14 Under the head 7 of the screw 5, the bore 17 is transformed into a clamping face 18, which widens in a cone towards the and ends with a cylindrical bore 19 Under the thread 9 of the rod 6 of the cap screw 5, a retaining profile 20

  annular, thinner than rod 6, forms with thread

  ge 10 of the connection pipe 1 an annular groove 21 A body 23 and an annular rib 24 of a ring

  stop 25, protruding downwards the cap screw 5 and assem-

  locked to the latter by interlocking and adhesion,

  lie in the annular groove 21 and the groove 22, formed between the shoulder 16 and the retaining profile 20 The body 23 is longer than the rib 24; it almost extends

  up to the frustoconical surface 18, its upper edge can

  before receiving a stop ring 26 which has circular edges 27, inside, and a conical external face corresponding to the internal face 18, outside When a

  traction is exerted in the direction of arrow 68, the con-

  connecting piece 14 is fixed by the stop ring in the screw 5, the edges 27 sinking in the known manner into the material of the pipe 14, under the effect of the tightening

  the ring 26 against the conical surface 18.

  The stop ring 25 and the support tube 15 are assembled by interlocking and adhesion, the internal wall of the ring having a collar 29 which fits into a groove

  corresponding external annular 30 of the shoulder 16.

  To mount the assembly shown in FIG. 1, the stop ring 26 is inserted in the cap screw 5, and the stop ring 25 is placed with the support tube 15 which is assembled to it The screw 5 being screwed into the tubing

  connection 1, the end of the pipe 14 can be

  be pushed into the opening of this screw 5, until its front end bears on the shoulder 16 To dismantle the assembly, the screw 5 is unscrewed from the pipe 1 and the stop ring removed with the support tube The stop ring 26 is then released and removed from the screw. It is then perfectly possible to remove the end of the tube from the cap screw. The support tube 15 can

  also be in one piece with the stop ring 25.

  In addition, it may be advisable to plan an assembly

  notched locking for the annular body 24 and the retaining profile 20. For sealing the assembly, it may be appropriate to provide, in the bore 17 of the cap screw 5, an annular groove 31 receiving an O-ring 32, in leaktight contact with the external face of the

connection 14.

  Figure 2 shows a second form of construction

  of an assembly according to the invention, the parts

  born in Figure I being provided with the same references.

  This second form of construction is particularly

  suitable for pipes 14 of relatively small diameter

  ble, plastic pipes 4 to 6 mm in diameter and

  with a wall thickness of 1 mm, in particular For such diameters

  meters, it is particularly important to keep the information

  entire pipe section, in order to minimize pressure losses The form of construction shown

  in FIG. 2 therefore does not have a support tube

  dull in the end of the pipe A stop ring 35, composed of an annular body 36 and an internal collar

  37, is provided at the end of the cap screw 5 The pro-

  body wire 36 corresponds to two trunks of superposed cones

  sés, The base surface of the lower truncated cone presented

  both an outer diameter greater than that of the base surface of the upper truncated cone, the latter diameter

  being greater than the outer diameter of the end

  of the lower truncated cone The annular body 36 is inserted into the end of the cap screw 5, -until the base of the lower truncated cone is perfectly

  aligned with the front face of the screw On its inter-

  ne and in the zone where S carries the stop ring 35, the

  -vis hat has an inverted profile corresponding to the con-

  outer tower of the latter, thus forming a sort of notched assembly which holds the stop ring in

  nested position The collar 37 serves as a support for the

  nested part of the pipe 14, the upper front face

  lower of the stop ring, internal to the cap screw, serving as a support for the stop ring 26, when the pipe

  14 is pressed into the assembly according to the invention.

  In the area of the annular body 36, the free width of the

  stop ring 35 corresponds to the external diameter of the tu-

  yauterie 14 The internal face of the stop ring 35 extends in a cone

  in the extreme part of the upper truncated cone In the example of

  struction shown in Figure 2, the screw 5 is screwed directly into

  a threaded hole 38, of a valve body 39 for example An advantage par-

  Particularly remarkable of this form of construction is that the threaded hole 38 does not require any adaptation, a conventional valve body 39 can be perfectly used. This form therefore allows the cap screw 5 to be pre-assembled with the stop ring.

  26 inserted and the stop ring incorporated, then its screw

  in the pre-assembled state in the threaded hole 38 of the support body

Pope

  The invention is not limited to the form of construction

  presented in the examples, but includes all the parts going in its direction In this regard, the heart of the present invention lies in the combination of a cap screw and

  a removable stop ring fixed at its end, the base

  gue constituting a limit nesting area for the pipe-

  terié to connect, on the one hand, a housing for the stop ring inside the screw, on the other hand The stop ring according to the invention can also be combined with a support tube fitted in the end driving,

  this ring then making it possible to limit the journey of em-

  limping with the part of this tube projecting from the former

end of the piping.

Claims (10)

Claims.   1 Interlocking assembly, for plastics piping   tick in particular, composed of a box receiving the end of the piping and a stop ring which holds the latter   deny in the rolled up position, as well as a support for the ex-   end of the piping and the stop ring, characterized in that the case is represented by a cap screw (5), the support for the end of the tube (14) and the stop ring (26) being constituted by a removable stop ring (15, 16,   ; 35), attached to the end of the cap screw (5).   2 assembly according to claim 1, characterized in that the stop ring (15, 16, 25; 35) has a body   ring (23, 24; 35) assembled by interlocking and adherent   this with the cap screw (5) and comprising an internal collar (29, 37).   3 Assembly according to one of claims 1 and 2, charac-   checked in that the cap screw (5) has a bore (17),   whose diameter corresponds to the external diameter of the pipe-   terie (14), this bore (17) transforming under the head (7) of the screw (5) into a clamping face (18), which widens in a cone towards the outside and is extended by a section ( 19) essentially cylindrical.   4 Assembly according to any one of claims 1 to   3, or more of these claims, characterized in   that a retaining profile (20), thinner than the rod (6) of the cap screw (5), is provided under the thread (9) of this same rod (6), and in that a body ( 23) and an annular rib (24) of the stop ring (25) enclose the retaining profile (20), the ring (25) projecting from the cap screw (5) towards the bottom.   Assembly according to claim 4, characterized in that the annular body (23) is longer than the rib (24) and extends practically up to the frustoconical surface (18), its upper front face serving to support the stop ring (26).   6 Assembly according to one of claims 4 and 5, charac-   terized in that the end of the piping (14) receives a support tube (15) having an annular shoulder (16), against which the end of this piping (14) bears, the external diameter of the shoulder (16) corresponding to that of the pipe (14), and the support tube (15) being assembled by interlocking and adhesion to the ring   stop (25) via the shoulder (16), the latter   denier preferably having an external annular groove (30), into which the collar (29) of the ring is embedded stop (25).   7 assembly according to any one of claims 4 to   6, or more of these claims, characterized in that   the external annular body (24) is fixed to the retaining profile   bare (20) by a notched assembly.   8 Assembly according to any one of claims 1 to   3, or more of these claims, characterized in that   the profile of the annular body (36) of the stop ring (35) corresponds to two truncated cones of cones, the surface of   base of the lower truncated cone with a diameter ex-   dull higher than that of the upper cone, the latter   deny diameter being itself greater than the outer diameter   from the upper end of the lower truncated cone.   9 assembly according to claim 8, characterized in   that the base surface of the lower truncated cone is ali-   locked with the front face of the end of the cap screw   (5), when the stop ring 035) is fitted.   Assembly according to either of Claims 8 and 9, charac-   terized in that the stop ring (35) extends in a cone upwards on its internal face, in the extreme part of the upper trunk of cone.   11 Assembly according to any one of claims 8   to 10, or more of these claims, characterized in   that the internal face of the cap screw (5) has an inverted profile corresponding to the external contour of the stop ring   (35), in the nesting zone of the latter.   12 Assembly according to any one of claims 1 to   11, or more of these claims, characterized in   the stop ring (26) has at least one circular edge   cular (27) on its internal face and a conical external face   corresponding to the internal face (18) of the cap screw (5).