FR2486195A2 - Saddle fitting for demountable pipe joint - uses screws to tension two looped straps and pull pipe onto saddle fixed sliding sleeve with ring seals - Google Patents

Abstract

The fitting (1) makes a demountable saddled joint on an existing pipe (C), being of a moulded plastics construction, and for the installation of a valve etc. It uses a base of a rectangular outline secured to the pipe (C) by means of two screw (52)-tensioned straps (34). A central passage (15) of a circular cross section locates a slidable sleeve (16) with compressible sealing rings (44,2) and a stop-rib (14) defines a spigot (36) into which a coupling pipe (35) is screwed. The underside opening of the passages (15) is rebated (39) to locate saddle (3), and two pipe-straps (34) are suspended from built-in bars (30) either side of the passage (15). A screw (52) with a hexagonal socket (H) is driven down to tension the strap (34) and secure the pipe (C).

Description

The present addition relates to the connection device characterized according to the main patent in that it firstly comprises a sole supporting, by means of rapid adaptation,
a tubular body for mounting a connection member, this tubular body delimiting with the sole a housing for angular and axial retentions of a joint block intended to seal between said body and the connection member, between said body and sole and between the latter and a pipe, and then> two tightening straps associated with the tubular body by two tensioning means.

 The connection device according to the main patent gives satisfaction for the adaptation, sealing and connection functions that it must assume in relation to pipes on which a branch connection must be made for the adaptation of taps, valves , etc ...

 The experiments and tests carried out, however, made it possible to note that the device according to the main patent involved a large number of constituent parts whose mutual cooperation requires attention on the part of the users so that the optimal conditions of adaptation are always met , mounting and sealing.

 To this end, the object of the present addition relates to improvements made to the subject of the main patent and, more particularly, these improvements relate to the implementation of simpler structural means making it possible to facilitate the implementation of the device as well. , moreover, that its realization and its manufacture.

 An object of the addition is to provide a device which can easily be produced by molding in any suitable material and even in plastic.

 Another object of the invention is to provide a device the various constituent elements of which can be mounted and assembled in a unitary form without risk of loss or deterioration of the most fragile of them.

 Another object of the addition is to provide a connection device making it possible to quickly, effectively and safely obtain an effective and efficient tensioning of the tension straps to obtain a firm adaptation on a pipe as well as sealing between the latter and the device.

To achieve the above goals, the connection device according to the addition is characterized in that the body is made in one piece and comprises
- a central part comprising a mounting means
a connection device and a reception housing
of a sliding joint assembly in the housing and cons
formed by a tubular element and at least one lined
sealing,
- at the base of the accommodation, a nesting seat for a re
complementary edge formed by a removable sole
independent,
- on either side of the central part, two extensions
lateral bearings each associated with
a tensioning means,
a movable tension member intended to sail
binds inside a recess delimited by the
extension,
a tightening strap intended to surround a ca
finalization and whose terminal parts are
covering are caused to pass through the recess
where they are subjected to a deformation of ten
sion by the tensioning means.

 Various other characteristics of the object of the addition will emerge from the detailed description given below with reference to the appended drawings which show, by way of examples, embodiments of the object of the invention.

 Fig. 1 is a sectional elevation of the connection device according to the invention.

 Fig. 2 is a plan view, partly in section, taken along line II-II of FIG. 1.

 Figs. 3 and 4 are cross sections taken respectively along lines 111-111 and IV-IV of FIG. 1.

 Fig. 5 is a partial sectional elevation illustrated # nt an alternative embodiment of one of the constituent elements of the object of the addition.

 Fig. 6 is a plan view showing another embodiment of the device.

 Fig. 7 is a partial sectional elevation of an alternative embodiment.

Fig. 8 is a plan view showing another embodiment of one of the elements constituting the object of the invention
As in the main patent, the connection device, as shown in FIGS. 1 to 3, includes an adaptation sole 1 having in its central part a circular hole 2 intended to be placed in coincidence with a hole 33 to be made in a pipe C on which a connection must be made. For this purpose, the sole 1 offers a surface in the form of a cylindrical wall sector. The sole 1 comprises around the hole 2 a base ana1 ~ 3 or cylindrical or polygonal area, intended to allow cooperation with a body 8 delimiting means 14 adaptation of a connection member 35, such as a tap or a fitting for fitting a branch pipe. The body 8 is also shaped to define a housing 15 for receiving a joint block 16 intended to seal between the sole and the pipe C, between the sole and the body 8 and between the latter and the connection.

 The connection device furthermore comprises tensioning means 22 cooperating with two straps 34 for tightening and fixing on a pipe C. The straps 34 consist of flexible strips which are cut to the desired length as a function of the diameter of the line C to which a connection must be made.

 According to the present addition, the body 8 is formed to comprise in its central part an adaptation means 14 formed by a tapping.

 By tapping is meant any helical thread formed from a concave surface of revolution, regardless of the technical means used to make such a thread.

 The internal thread 14 is provided in the axial extension of the housing 15 in the form of a bore, having, however, a diameter smaller than the latter. The housing 15 opens at the lower face 38 of the body 8 by a seat 39 having a transverse annular face perpendicular to the axis of the housing 15. The seat 39 is intended to receive the cylindrical annular base 3 of the sole 1. Preferably, depending on the addition, the periphery of the seat 39 is delimited by a flexible skirt 40 intended to allow snap-on mounting of the annular base 3. For this purpose, provision may be made to bring the end of the skirt 40 a molding 41 whose internal peripheral surface is delimited by a frustoconical bearing leading to an abrupt shoulder.

The housing 15 is intended to contain a joint assembly 16 which is constituted by a tubular spacer 42 capable of sliding axially in the housing 15. The spacer 42 is associated with two independent, removable seals 43 and 44, made of an elastically deformable material. These linings are provided to cooperate with the corresponding transverse face ′ of the connection member 35 and with the peripheral external face of the pipe C. For these purposes, the lining 43 has a flat annular face cooperating with the seat 39 and a annular face defining a cylindrical surface segment to cooperate with the outer peripheral surface of the pipe
C. The seal 44 is trapped between the internal thread 14 and the spacer 42 while the seal 43 is held between the latter and, for example, a flange 46 formed for this purpose at the edge of the hole 2 by the concave face. . In this way, the seal assembly is disposed and immobilized inside the bore 15 in which it can be subjected to a small axial displacement during the crushing of the linings as shown by the following ,
Fig. 5 shows that, as a variant, it may further provided for the spacer 42 to include at least one axial groove 47, hollowed out in the outer peripheral wall. This groove 47 is intended to engage an angular immobilization lock 48, such for example, a key engaged, moreover, in a groove 49 delimited from the peripheral face of the housing 15.

 Such an arrangement may between preferred, in particular, when it is necessary to avoid any parasitic rotation of the spacer 42 and of the linings during mounting and tightening by rotation and screwing of the connection member 35.

 According to another constructive arrangement of the addition, the body 8 comprises, on either side of the housing 15, two extensions 50 each carrying a tensioning means 51 for tensioning a strap 34. According to one embodiment preferred, each tensioning means 51 is constituted by a screw 52 capable of other mounting in a thread 53 presented by the extension 50. The thread 53 is formed in the axis of a recess 54 in which the screw 52 can be made to protrude or on the contrary be completely erased. Maneuvering or driving in rotation of the screw 52, with a view to its relative displacement, can be ensured by any suitable means and in particular by a hexagon socket 55.

 The recess 54 can be made in different possible ways and correspond, for example, in its volume, to the extension of the internal thread 53 associated with two recesses 56 delimited in hollow from the peripheral wall over a thickness substantially equal to twice that of the strap 34. The clearances 56 can be provided on wall sectors of any length, in any case greater than the width of the strap 34.

The clearances 56 extend axially in the direction of the lower face 38 of the body 8 from the base or the lower edge 57 of two slots 58 which are formed, through the wall of the extension 50, from the external surface to open into the recess 54. The openings 58 are formed in opposition in a plane weapon perpendicular to the axis of the thread 43 and in a common direction which is perpendicular to the plane containing the axes of the housing 15 and of the threads 53 which are parallel to each other . Fig. 4 shows that the lower edge 57 of each lumen 58 has, in cross section, a convex and, for example, semi-cylindrical shape.

 The body 8, the spacer 42, the sole 1 and the screws 52 are preferably made of molded plastic, in particular acetal resin, polyamide, etc.

 The connection device described above is used as follows.

 As has been indicated, the various constituent elements form a unitary assembly which is completed by the positioning of the two screws 52 in the extensions 50 so as to completely release the openings 58.

 The device fits onto a pipe C by placing the assembly in the axis of a hole 33 to be made in the peripheral wall of this pipe. To this end, the sole 1 is placed directly on the outer peripheral wall and it is therefore possible to ensure, even at the last moment, a suitable complementarity between the device and such a pipe, by adapting in the seat 39 a sole 1 of which the bearing surface 46 corresponds to the outside diameter of the pipe C.

 In the application position, the lining 43 borders the geometrical location of the hole 33 to be executed and the immobilization of the device is obtained while ensuring the positioning of the two straps 34.

 Such an operation is carried out by surrounding the pipe C with each strap 34, the end portions 34a and 34b of which are each made to pass through a lumen 58 while being disposed in opposite engagement. The parts 34a and 34k then pass through, with overlap of one another, the recess 54 and each protrude outwardly from the extension 50 by passing through the other lumen 58. The end of one of the terminal parts, for example 34a is thus covered by the strap while the end of the part 34b projects, externally to the extension 50, representing a pull tab 59.

 In this position (fig. 4), the screw 52 of each extension 50 is maneuvered to project by its tension end 60 inside the recess 54. The screw 52 has the effect of subjecting the end portions 34a and 34b overlapping each other, to a deformation resulting in a tensioning and a tightening of the strap 34 around the -channel C.

 As soon as such tension arises, the tab 59 is used to ensure the exact adaptation of the strap 34 around the pipe so as to compensate for and eliminate the excess length of the # strap 34.

 When this length compensation operation has been carried out, the screw 52 is maneuvered to impose a deformation in double inflection on the two end portions 34a and 34b which are brought to take place gradually in the clearances 56. The double inflection occurs at edges 57 and the periphery of the end 60.

 This results in a progressively increasing tension applied to the strap 34 which tightens the body 8 on the upper generator of the pipe C. The double inflection imposed has the effect of creating significant friction between the end portions 34a and 34b of the strap , thus preventing them from # sliding relative to each other. The displacement of the tightening screw 52 then causes the progressive tensioning of the strap 34. As the friction increases in proportion to the tension, the blocking of the terminal parts is maintained whatever the force applied.

 The tightening applied by means of the two straps 34, arranged on either side of the housing 15, makes it possible to immobilize without risk of rotation of the body 8 on the pipe C and to place the lining 43 exactly on the periphery of the hole 33 to be practiced.

 It is then possible to mount on the body 8 the connection member 35 so as to produce, by axial sliding of the spacer 42? a crushing of the linings 43 and 44 establishing the seal between the pipe C and the sole 1, between the latter and the body 8 and between the body 8 and the member 35.

 The adaptation carried out as said above then makes it possible, when necessary, to install the appropriate drilling tools on the member 35 to perforate the peripheral wall of the pipe C and to make the intercommunication between the latter and the 'connection member 35 provided through the hole 33.

 To avoid damaging the end portions 34a and 34b of each strap 34, provision may be made to bring a fillet or a chamfer 61 at the end of the screw 52.

 As is apparent from the above, the connection device is in a unitary form constituted from a limited number of parts which are assembled relatively removably to facilitate their execution as well as interchangeability in the event of breakage or defect.

 Another advantage of the embodiment according to the addition lies in the fact that it became possible to produce a solid body 8 having extensions 50 capable of receiving screws 52 of relatively large dimensions and, therefore, easy to maneuver and able to generate a firm tensioning of the tightening straps 34.

Fig. 6 shows that it is also possible to produce the body 8 so as to make it have extensions 50a delimiting threads 53 whose axes are orthogonal to the axis of the housing 15 and the collar 36. In such a case, the immobilization of the connection device on a pipe is obtained by simultaneously passing the two end portions 34a and 34b of each strap 34, first in a lumen 58a, then through the recess 54a, then through the second lumen 58. Beyond this latter, one of the terminal parts, for example 34z is folded up in the form of a loop to be reintroduced into the recess 545 and pass through the first light 58a while being disposed between the edge 575 of the latter and the two end parts of superimposed straps previously engaged. The end 59e represents, as before, a lug for traction and compensation for length prior to the tensioning which occurs as said above by double inflection and deformation of the end portions 34a and 34b passing through the recess 54a
The left side of fig. 1 shows, as a variant, that each extension 50 may comprise a thread 531 of diameter less than a cylindrical recess 541, or not, which may optionally be between blind and not lead to the level of the lower face 38 of the body 8. In in such a case, the openings 58 are provided in the border zone between the bore 531 and the recess. A single embodiment, possibly # eliminates the existence of the clearances 55 which are then replaced by the difference in diameter existing between the thread 531 and the recess 541.

The invention finds a preferred application to devices for handling on pipes for circulation of fluid under pressure,
Fig. 7 shows that it is possible to replace the two linings 42 and 44 with a single sealing member 62, being in the form of a cylindrical tubular casing occupying the entire height of the housing 15. The casing is associated with a internal rigid tube 63, intended to prevent sagging during tightening between the pipe C and the bypass member 35. It is advantageous to give the tube 63 a height greater than that of the casing 62 so as to allow its partial engagement inside the bypass member 35 In this way, the tube always occupies an internal holding position of the casing 62, whatever the deformation imposed on this casing by the tightening of the member 35.

 Examination of fig. 7 makes it possible to note that the single envelope 62 achieves sealing between the body 38 and the connection member 35, between the body 8 and the sole 1 and between the latter and the pipe C.

 Fig. 8 shows that in some cases it may be advantageous to replace the single body 8 with one. piece, from the previous example, by a modular structure. It can be provided for example, to delimit the housing 15 in a block 64 having means of adaptation of the sole 1. On two faces parallel to each other and perpendicular to the sole, the block 64 comprises means 65 of removable mounting for two lateral modular blocks 66, each constituting an extension 50. In this way, it becomes possible to constitute bodies 8 having, at the level of the housing 15, different bores by only involving two different sets of blocks 64 on which can adapt the same side blocks 66 carrying the means for tensioning a strap 34.

 In the example illustrated, the means 65 are constituted by dovetail assemblies but it is obvious that equivalent technical means can be provided.

 The invention is not limited to the examples described and shown since various modifications can be made without departing from its scope. In particular, in certain cases, the body 8 may include an extension 36 forming the base or the lower connector extending a half-casing constituting a connection member which is then definitively formed, not by the summer 35, but by adapting the upper crankcase.

Claims (10)

CLAIMS:  1 - Device for connection to a pipe of the type comprising a body provided for mounting a connection member and associated with a pierced soleplate applied and kept in coincidence with a hole to be made in a pipe and at least one tensioning belt provided of a tensioning means, and comprising, according to claim I of the main patent, on the one hand, a joint block mounted in a housing of the body and intended to achieve the seal between the body and the organ, between the body and the sole and between the latter and the pipe, on the other hand, a removable sole with respect to the body and, moreover, two tension straps associated with two tensioning means, characterized in that the body comprises  - a central part comprising a mounting means 14  a connecting member 35 and a housing 15 of re  design of a seal assembly 16 sliding in the box  ment and constituted by a tubular element 42 and at  minus a seal 43,  - at the base of the housing, a seat 39 for fitting a  complementary rim 3 formed by a removable sole  independent 1,  - on either side of the central part, two extensions  lateral deposits 50 each associated with  . a tensioning means 51,  . a movable tension member 52 intended to make  protrusion inside a delimited recess 56  by the extension,  . a tightening strap 34 intended to surround a  line C and whose end parts  overlapping are led to cross the hollow  ment 56 where they are subject to deformation  tension by the tensioning means 51.  2 - Connection device according to claim 1, characterized in that the joint assembly 16 comprises a tubular spacer 42 angularly immobilized in the housing and separating two independent seals 43-44.  3 - Connection device according to claim l, characterized in that the joint assembly 16 is constituted by a single tubular casing 62 made of elastically deformable material and by an internal tube 63 of greater axial length than the casing.  4 - Device according to claim T, characterized in that the body comprises at the base of the housing 15 an annular seat 39 for the reception of an annular flange formed projecting by the sole opposite a face 43b in sector concave cylindrical application on a pipeline.  5 - Connection device according to claim 4, characterized in that the seat forms a peripheral skirt 40 of latching the edge of the sole.  6 - Connection device according to claim 1, characterized in that the body has two lateral extensions 50 each associated with a tensioning means comprising a screw 52 mounted in a thread 56 opening into a recess 54 in which two opposite openings 58 open made in the wall of the extension in a direction perpendicular to the axis of the thread.  7 - Connection device according to claim 6, characterized in that the internal wall of the recess comprises the right of the lights two clearances 56 directed opposite the thread.  8 - Connection device according to claim 1 or 6, characterized in that the extensions 50 are formed so that the tapping axes are parallel to the axis of the housing of the central part.  9 - Connection device according to claim 1 or 6, characterized in that the extensions are formed so that the tapping axes are perpendicular to the axis of the housing of the central part.  10 - Connection device according to claim 7, ca characterized in that the clearances have a depth # substantially equal to twice the thickness of the end portions of the strap  II - Connection device according to one of claims 1, 6, 8 or 9, characterized in that the body is constituted by an associated central block 642 by removable assembly means 65 with two lateral blocks 66 constituting the extensions .