FR2479407A1 - PLUG SYSTEM FOR QUICK AND EASY TO DETACH CONNECTION OF TUBULAR CONDUITS OF SYNTHETIC MATERIAL - Google Patents

Abstract

PLUG SYSTEM FOR QUICK AND EASY TO DETACH CONNECTION OF TUBULAR CONDUITS OF SYNTHETIC MATERIAL, INCLUDING A CONNECTION BOX FOR RECEIVING THE END OF THE CONDUIT AND A TENSION ELEMENT PLACED INSIDE THE HOUSING WITH AT LEAST ONE CUTTING EDGE INSERTS AT THE END OF THE CONDUIT AND AN OUTER CONICAL SURFACE THAT COOPERS WITH AN INSIDE CONE OF THE CASE AS WELL AS WITH A RING OF SEALING SITUATED INSIDE THE CASE, AND CHARACTERIZED IN THAT THE CASE 1 IS SHAPE OF TWO THREADED PARTS 2, 3.

Description

The invention relates to a plug system for a

quick and easy to detach connection of tubular pipes

res made of synthetic material, including a connection box

ment to receive the end of the pipe and a tension element placed inside the box with at least one cutting edge which fits into the end of the pipe and an external conical surface which cooperates with an internal cone of the case as well as with an annular packing

  seal located inside the case.

  This plug system, for example known by the

German Patent Application No. 2,807,508 is made up of five separate elements, so that the housing and the tubing are separate. The housing rests in an elastic manner, during mounting, in a circular groove in the tubing, so that a support ring in connection with the tubing forms a chamber for receiving the sealing ring. This

plug system has the disadvantage that the tubing re-

  has a special part, and in addition, for example a direct connection in the bores of the housing, for example

  valve body is not possible. Due to the incli-

  elastic casing of the housing on the tubing, the force of

rage by which the connected tube is held is not re-

lable. The object of the invention is to provide a system

  with plug usable in conjunction with the use of standard parts

and whose separation is possiole using conventional tools, and which is also distinguished by a structure

simple and robust, with high breakout forces

  forms to the requirements of vehicle manufacturing. According to the invention, the desired result is obtained thanks to the fact that the housing is composed of two threaded parts. One of these

  parts can be made in the form of line tubing

and the other in the form of a union nut which can

be screwed on the first. Likewise, it is obviously pos-

  likely that one of the parts is directly formed from a valve body having a bore provided with an internal thread in which the other part, formed under the

shape of a connecting screw, can be screwed. The bore. fi-

the inner lettering can also be part of an adapter which is screwed into a tap body. A plug system

  this kind can thus be adapted to a pipe fitting,

  titled according to German industry standards, with a supper. In this case, a union nut according to the invention must simply be provided with a particular clamping nut produced according to the invention. After fitting a sealing ring on the connecting thread of the tubing, introduction of the clamping ring and screw of the new

union nut, you can for example introduce dalis arma-

tures a single layer plastic tube with

and without protective sleeve, up to the stop of the tubing.

  During fixing, the clamping ring widens and leaves

  the plastic tube slide and hang securely.

  During an interlocking attempt, the clamping ring is supported by its cone on the corresponding inner supper of the union nut, and the cutting edges integral with the

  internal diameter penetrate the plastic tube

  than. In addition, it is particularly advantageous that the year-

  sealing ring is located in the upper region of the connecting nut or the connecting screw through which the plastic tube is introduced into the connection, since it follows that the sealing of the 'reinforcement according to 1 the invention is not damaged by damage to the

  end of the pipe, for example by the cutting edges

of the clamping element.

We will now describe in more detail various modes

  of the invention, by way of non-limiting examples

with reference to the attached drawings.

Figures 1 and 2 show, partially in section, two possible embodiments of a plug system according to the invention. Figure 3 is a partial section of a tension element used in the embodiments of Figures 1 and 2. Figures 4 to 5 show different variants of

realization of a plug system according to the invention, in

partial pe and with a connecting screw.

  FIG. 7 is a view of a tension element used

read on figure 6.

  Figure 8 is a section through VIII - VIII of the fi-

gu: 'e 7.

  Figure 9 shows another embodiment of a plug system following the invention, in partial section and with a connecting screw. Figure 10 shows another embodiment of a plug system according to the invention, in partial section

and with a union nut.

Figure 11 shows another embodiment of a plug system according to the invention comprising a nut

fitting.

  Figure 12 is a view of the tension element

used in figure 11.

  Figure 13 is a section through XIII - XIII of the fi-

gure 12.

  On -a Figure 1, there is shown a card system

  according to the invention. This system includes a box 1 consisting of

killed jar skies threaded parts, a union nut 2 and a

  threaded tubing 3. The tubing 3 has a connecting piece

  sound 4 which can have a filetabe, as well as a fitting 5 provided

an external thread J to which the internal thread is adapted

tene of the union nut. The nut 2 is screwed onto the rac-

cord 5. Inside the nut 2 is disposed a tension element having the shape of a tightening ring 6.The ring 6 has a united entry zone 8 whose outer surface has the shape of a supper 8a and the inner surface of which has, in the example shown, three cutting edges 9. To the inlet zone there is connected a middle section 10 which has a smaller wall thickness than that of the zone 8. At the section 10 is attached an end 11 having the shape of an inwardly directed rim. entry area 8 cooperates

by its outer cone 8a with a corresponding inner cone

12 of nut 2. In front of cone 12 is a re-

  cylindrical region 13 which has a groove 14 in which is placed a ring 15 constituting an elastic ring of

sealing. The diameter of the region 13 is adapted to the diameter

  be outside of a plastic tube 16 which must be inserted, so that the latter can be sealed by the ring 15. The inner cone 12 is associated with a zone

guide 17 of the nut, the inside diameter of which corresponds to

lays about the sum of the outside diameter of the tube 16 and

double the thickness of the clamping ring 6. The

  cord 5 has an opening 18 which goes in. widening towards the end of the projection. The tubing 3 thus corresponds to a standardized tubing, so that the plug system according to the invention can be partially formed of standardized elements, which allows universal use for relatively low manufacturing costs. At the end of the opening 18 inside the tubing 3 is a projection 19 which constitutes the passage to the bore 20 and serves as a stop for the end of the tube. The bore 20 has an internal diameter corresponding to that of the tube 16. In

the end of the tube is inserted a socket 21 advantageously

  metal, which is used to support the tube

made of synthetic material. The socket 21 has at its end

tee which protrudes from the tube a collar 22 which is corpri-

mé during the fitting of the tube and then 2ors of the tension

sion exerted between the end of the tube and the projection 19. The threaded part is further made tight towards the outside

  by a ring 23 disposed in a posterior attachment 24.

  An inclii.ée part 25 of the nut 2 produces a compression

additional ring when tightening the nut.

  In Figure 1, the fickle system is shown

  felt tight. For mounting, the tube -with socket fitted in the pre-assembled housing is fitted with a permanently mounted and tightened nut. Due to the elastic construction of the clamping bar, the tube can be smoothed through the cutting edges up to the stop 19. Thanks to the clamping force of the spring arms (see Figure 3) of the clamping ring , the cutting edges penetrate into the plastic tube and hold it securely. In the event of traction on the tube or under the effect of an internal pressure, the cnercile tube to

  get out of the case with the drive ring

missed. Thanks to the opposite position that the two cones 8a and 12 then take, the locking force of the lock rings is further increased. Being doli-é that the sealing ring is located er before the lock bag in the se.ls du

  screwing, we get the advantage that damage caused to the

be by the cutting edges when in place or during a later removal, in the event of loosening, of the system

  with plug, -re cannot have an influence on the sealing.

The plug system according to the invention is detachable to all

  moments and can be used again. For this purpose, it is sufficient

  unscrewed nut 2 from tubing 3. Nut and nut

  clamping force can thus be moved away from the tube, which can be achieved essentially due to the elasticity of the

clamping ring, as will be described later with reference

this in fieure 3, the low height of the teeth, and the dis-

  particular position of the sealing ring 15.

In Figure 2, there is shown another mode of

realization of a plug system according to the invention. The m% -

  my parts have the same references as in figure 1.

  This system is distinguished from that of FIG. 1 by a long

  weaker. This is due to the fact that the clamping ring

ge 7 is partially inside the nut 2 and partially at. inside the threaded tubing. The region

guide 17 of Figure 1 is deleted. In addition, the file-

  internal stage of nut 2 joins directly to the internal side

  laugher 12, with which it is screwed to connection 5 by the

  external thread 6. Connection 5 has a cy-

lindrique 25a in which the clamping ring 7 is housed with its middle section 10 and its end 11, the latter

  bearing against a wall 26 of the opening 25. At the

  25a join a section 27, made by drilling, of

  bore 20, the diameter of which corresponds to the outside diameter

tube 16, so that it can be supported

  be the projection 19 as a limit stop. The dou-

the 21 is not, in this example, deformed, but is compressed in the bore 20. It is thus useless to carry out the assembly

  preliminary of the sleeve on the tube.

  In Figure J, there is shown the clamp ring.

  rage 7. In this case, it must be recognized that the internal diameter

  the end 11 is greater than that of the cut edges

pantes 9, which is itself smaller than the outside diameter

  tube 16. The clamping ring present on its

  tower two or more longitudinal slots 28 which extend e

  to the opposite end from an iron annular region

mea 29 formed by the end 11. The opening 30 of the entry zone widens towards the beginning of the opening, so that the tube 16 can easily be introduced into the clamping ring. the longitudinal slots 28 in connection with the

  duction of the thickness of the walls of the middle region cons-

clamp spring arms with the clamping rod 7, whereby a radicle elasticity of the ring 7 is obtained,

particularly in the region of its cutting edges 9. The base

tightening guide may be made of synthetic material or

metal, preferably brass.

In FIG. 4, another mode of

realization of a plug system according to the invention. This sys-

  teme has a clamping ring 7, which corresponds to that of Figures 1 to 3. The system shown is constituted by a housing 31 which may have the shape of a tap body or a similar shape. The case can also be part of an adapter. The housing 31 has a threaded bore 32 into which a connection screw 33 is screwed. Inside the connection screw is the clamping ring 7 with its inlet zone 8 and its middle section 10. In addition, the outer cone 8a of the zone 8 cooperates with an inner cone 34

  of the connecting screw 33. Section 10 is guided - the interior

laughing of a section 35 produced by drilling which is connected to the cone 34. By its end 11, the clamping ring 7 projects out of the screw 33 and can bear on the bottom

  36 of the bore 32 during the introduction of the tube 16. The di-

interior meters of cone 34 and sectiol 35 corresporn-

tooth with the outside diameter of the outer cone 8a or of the sec-

  tion 10. Through its head 37, the screw 33 is in contact with the surface

outer face 38 of the housing 31. The head 37 has a sec-

tion 39 produced by drilling and the diameter of which is adapted to that of the tube 16. In section 39 there is a groove 40 with a sealing ring 41. A groove 43 is provided at the connection of the head 37 to the external thread 42, in

which a ring 44 is inserted to seal the sec-

  threaded tion. The end of the tube 16 is inside

  a section 45 made by drilling which connects to the bore

sage tapped 32 and the diameter of which is adapted to the outside diameter of the tube 16. In addition, the end of the tube is in contact with the projection 46. The end of the tube is in turn pushed onto a metal sleeve 47 which is applied in the bore 48 against the projection 49. Thanks to this embodiment of the protective sleeve and the end of the tube as well as the clamping ring, a sort of labyrinth seal is produced. As in the embodiments of the figures

  1 and 2, the sealing ring is associated with the clamping ring

  spleen so that damage to the surface of the tube by

  the serrare ring have no impact on the waterproofing

tee provided by the alneau. This embodiment of the plug system is assembled with greed, that is to say that the sleeve is inserted in section 48 of the housing 31 and that the connecting screw is tightened securely, so that for mounting

  of the tube, it only needs to be pushed into the box.

tier up to projection 46.

In FIG. 5, a variant of the plug system of FIG. 4 is shown, and the same parts as on

this figure has the same references. But this varian-

  te is essentially distinguished by the shape of the ring

  tightening 51 and the inner contour of the connecting screw 33.

  The ring 51 has an entry area 52 having an outer cone

laughing 53 and preferably at least two cutting edges 9

  on the inner surface. Enviruoi in the middle of the area

  There is a reduced middle section 54 in the thickness.

  sor of the wall which ends in an end 55 in the form of a flange folded in radial L.ent outwardly and having a thicker wall. Region 55 in turn forms a closed ring from which slits extend towards the end

  opposite, so that the desired radial elasticity is obtained

  bare as in the case of the clamping ring 7 of the

previous achievements. By the end 55, the ring 51 reposes

  is against the bottom 36 of the bore 32. The outer cone 53 cooperates with the inner cone 34, and the connecting screw 37 ends with the inner supper. Section 56 of the screw head 37 in turn has a sealing ring 40, 41, but

  nevertheless presents over a greater length a

  lindrique having a diameter adapted to the outside diameter of the tube 16, as is the case in the embodiment of FIG. 4, where the outline of the cone already starts in the region of: a groove 40. The tightness of the thread is performed as in the example in Figure 4. In the end of the tube is

  introduced a socket 57 having a collar 58 against the

which bears the end of the tube, and the collar 58 bears against a projection 59 of the section 60 of the bore, at the connection with the bore 50. the section 60 is adapted as regards its diameter to the outside diameter of the collar 58 and therefore of the diameter of the tube 16. The embodiment of FIG. 5 has, in comparison with that of FIG. 4, a reduced diameter of the connecting screw and a longer length.

  grease, although the interior outline is however simapli-

  trusted. In Figure 6, there is shown another embodiment of a plug system with connecting screws. This system essentially differs from those of FIGS. 4 and 5 by the production of the clamping ring 62. This,

  unlike clamping rings 7 and 51, only includes-

  a conical part with an external cone 63 and with only

lemeut an inner cutting edge 9. your precise shape of the ring 62 is shown in Figures 7 and 8. It has a slot 54. To obtain a sufficient elasticity ra.dCiale, the ring is either a synthetic material or steel at

  spring. The inside contour of the bore of the housing 31 cor-

responds as a whole to the embodiment of FIG. 4, and it is the same for the production of the socket 47. On the other hand, the connecting screw 37 corresponds to the production of

  figure 5. Instead of using a ring, we realize the watertight

  chéit (using a gasket 67 introduced into a groove

re 66 of section 56.

In FIG. 9, another au-

be an example of a plug system following the inversion, based on the embodiment of FIG. 6. The clamping bug 62 has, however, unlike that of FIGS. 7 and 8, three stop teeth. In this embodiment, the watertight ai 7G, however, is not housed in a groove of the screw.

  of connection 71, but placed at the end thereof and r.ai-te-

naked by a ring 72 located before him. The ring 72 has an internal cone 73 which cooperates with the external cine 63 of the clamping ring 62. This embodiment has the following advantages: under the effect of pressure, the sealed ring 70 is applied against the tube, depending on the pressure, by the clamping ring 62, and the ring 72, in addition to its basic pressure, so that the compacting action is increased, and the costly production of a groove in the connection screw can be omitted, just as the connection screw in itself can be executed in the form of a simple hollow screw, without an internal cable. In addition, a

separate waterproofing of the screw is not necessary.

In FIG. 10, the principle of tightness and tension with a tightening ring and a support ring in FIG. 9 and transformed into a plug system with a coupling nut according to FIG. 2. In addition, the ring clamp 63 and the support ring 72 correspond to the embodiments of FIG. 9. The elements identical to those of FIG. 2

  have the same references. However, in this mode of rea-

In addition, sealing the thread region is useful as before. The protective sleeve 81 is here in one

piece with the tubing and delimits with it a space annu-

  area 82 which receives the end of the tube.

  In FIG. 11, another variation has been shown.

  te of a plug system according to the invention. This variant comprises, as in FIG. 1, a coupling nut 2 and a threaded pipe 3. However, it has another principle of tightness: reiterated in connection with a modified tension element. The ring 75 is surrounded on the one hand by the fitting 5 and on the other hand by a tension element having the form of

  a clamping ring 76. The ring 76 has three cutting edges

  pantes 9 as well as an outer supper 77 which cooperates with the

  inner supper 78 of the union nut 2. The clamping ring

  rage has, for a better introduction of the tube 16, a

  opening opening 79 which is widening towards the ex-

  and a chamfered bearing surface 80 for the ring

75. the clamping ring 76 is shown

dividually in Figures 12 and 13. It has a

slot 87, by which, - in connection with the flattening ex-

  opposite interior 88, two elastic arms are formed, which makes it possible to obtain a radial elasticity. the ring can be

  made of a synthetic elastic material or a metal,

brass ference. The thread region is, as in the

Figure 2, also made watertight to the outside.

Claims (15)

REVENDI CAT IO.'i S 1 - Plug system for quick and easy connection   lash to be detached from tubular plastic pipes, including a connection box to receive the external   mity of the pipe and a tension element placed from the inside laughing at the case with a cutting edge at least   sère in the end of the pipe and a conical surface   outer which cooperates with an inner cone of the housing thus if with an annular gasket located inside the box, and characterized in that the box   (1) eht formed of two threaded parts (2, 3, 31, 33). 2 - System according to claim 1, characterized in that one of the threaded parts has the form of a tubing line-   (3) and that the other can be screwed onto a nut cord (2).   3 - System according to claim 1, characterized in that a housing (31) has a threaded threaded bore (32)   inner stage, in which the other part of the case having   the form of a connecting screw (33) can be screwed.   4 - System according to one of claims 2 and 3,   characterized in that the peripheral seal (14, 15, 40, 41, 66, 67) is produced in the direction of screwing in the connecting nut (2) or the connecting screw (33) and at their   inside, in front of the tension element (7, 51, 62).   5 - System according to the us.e of claims 1 to 4, ca-   characterized in that in the end of the tubular pipe a socket (21, 47, 57, 81) is inserted. 6 - System according to one of claims 1 to 5, ca-   characterized in that the tension element has the shape of a base   clamping guide (7, 51, 77) having at least two cutting edges your interior (9). 7 - System according to one of claims 1 to 6, ca- characterized in that the clamping ring (7, 51) has a   median section (10, 54) of reduced thickness, which is aligned from in the direction of the vissabe to the entry region (8, 52)   which has an outer cone (8a, 53) and cutting edges   tes (9) and ends with an end (11, 55) in the form of a rim. 8 System according to one of claims 6 and 7, characterized in that the serrate ring (7, 51) has around its periphery at least two longitudinal slots (28) laid axially and starting from a closed annular region (29). 9 - System according to one of claims 1 to 6, ca-   characterized in that the clamping ring (76) has an external supper (77) and internal cutting edges (9), airnsi that a longitudinal slot (87) to which is opposed a- flattening (88). - System according to one of claims 1 to 9, characterized in that the peripheral seal affects the shape of a lip (66, 67). 11 - System according to one of claims 1 to 10, characterized in that the socket (21, 57, 81) is inserted in the case. 12 - System according to claim 1il, characterized in that the peel (21, 57) has a collar (22, 58) on   along which the end of the tubular pipe rests laire.   13 - System according to the uIle of claims 1 to 12, characterized in that the inner side (73) consists by a support ring (72) arranged inside the box tier (1). 14 - Systt-me according to claim 13, characterized in that the support ring (72) bears directly on a sealing ring (15, 70) which is inserted from the other SIDE of a connecting screw (71) or a union nut (2).   - System according to one of claims 1 to 14,   characterized in that the sleeve (81) is in one piece with   the threaded pipe (3) and delimits inside this tu- buling an annular space (82).   16 - System according to one of claims 1 to 15,   characterized in that the clamping rod (62) has an outer cone (63) as well as an inner cone, the assembly of which forms a cutting edge (9).   17 - System according to claim v, characterized in that the sealing ring (75) is en.toure a cOtté by the clamping ring (76) and the other by the racéord (J) threaded tubing (3).   18 - System according to one of claims 1 to 17, characterized in that a sealing of the line region-   tage between the threaded parts (2, 3, 31, 33) is made in their opposite bearing regions.