FR2571469A3 - ADJUSTABLE CONNECTION GROUP IN PARTICULAR FOR ASSEMBLING HYDRAULIC EQUIPMENT - Google Patents

Abstract

ADJUSTABLE CONNECTION GROUP, CHARACTERIZED IN THAT IT IS CONSTITUTED BY A HOLLOW PART 4 INCLUDING AT ONE OF ITS ENDS A PART WITH A HEMISPHERIC SURFACE 5, AT ITS OTHER END, A FIRST PART INCLUDING AN EXTERNAL THREAD 10, A TWO PART 8 EQUIPPED WITH AN EXTERNAL THREAD, THE FIRST PART CAN BE INSERTED INTO A THREADED ATTACHMENT 11 AND THE SECOND THREADED PART 8 INCLUDING A NUT 17 CONTAINING AN ANNULAR SEAL 13 ENSURING WATERPROOFING.

Description

In domestic heating systems, radiators are used

  supported by the building structures which are supplied by pipes

  with regulating and stop valves.

  For the assembly of these valves to the inlet and return pipes of the radiators, threaded connecting members are used which are tightened by means of bands, tow, pastes or the like.

  applied to threads to ensure watertightness.

  This operation is usually carried out when the radiator and the pipes are already fixed in their respective positions and the connecting members in question must be screwed more or less to compensate for the inevitable relative position errors.

radiator and pipes.

  We proceed by successive tests by gradually increasing the screwing up to the distance corresponding to the correct length of the group

fitting.

  However, this adjustment cannot be made or can only be made in a very limited manner in the opposite direction by partial unscrewing of the parts which constitute the connection group, since this operation would adversely affect the seal at the thread ; if necessary, make a new gasket

  of the threaded coupling by dismantling the part.

  The assembly process which has just been described therefore turns out to be quite long and laborious and has a strong influence on the cost price of assembling the entire installation.

of heating.

  The problem that arises is therefore that of putting

  at the point of a connection group which allows an adaptation

  tation of dimensions at the different installation positions

  fitting of pipes and radiators, mounting

  rapid and the realization of devices ensuring

  cheerfulness regardless of the skill of the editor and the

the care he takes in mounting.

  This object is achieved, according to the invention, by the production of an adjustable connection group, in particular for the assembly of valves to radiators or to similar devices, which is constituted by a hollow part comprising at one of its ends part

  having a hemispherical surface capable of mating

  bend with a corresponding hollow conical surface of the valve, with screw devices ensuring the tightening of the surfaces, and, at its other end, a first part comprising an external thread followed by a

  part having a cylindrical surface and a second

  the part comprising an external thread, the first part provided with the external thread being able to be inserted in a threaded fitting provided on the radiator and the second part provided with a thread comprising a tightening nut containing an annular seal ensuring the sealing at the level of the cylindrical surface and against the surface

  front of the fitting when tightening the nut.

  In the connector group according to the invention, this cylindrical surface of the hollow part extends over a

  sufficient length to hold the gar-

  niture in several different positions corresponding to different screwing distances of the first threaded part in the fitting, the height of the nut screwed on

  the second threaded part being chosen accordingly.

  It is advantageous that the hollow part comprises, in its end part having a hemispherical surface, an elastomer coating of the hemispherical surface itself; in particular, this elastomer coating has a reduced thickness, preferably less than

0.4 mm.

  The seat of the hoop trim has a depth such that when the nut is tightened until

  that its end surface collides with the corresponding part

  fixed laying during assembly, this annular packing is deformed by an amount sufficient to ensure

sealing.

  Various other features of the invention

  moreover emerge from the detailed description which

  follows. An embodiment of the object of the invention is shown, by way of nonlimiting example, at

attached drawing.

  The figure is a side view, partially in section, of the device according to the invention allowing

  assembling a radiator to an adjustment valve.

  As shown in the figure, the radiator 1 is coupled

  connected to a valve 2 via a connection group

adjustable cord 3.

  This group consists of a hollow part 4

  carrying at one of its ends a spherical surface 5 provided with a coating 6 and capable of being coupled to the

conical surface 7 of valve 2.

  At its opposite end, the hollow part 4 comprises

  a part 8 provided externally with a thread and for

  before entering a threaded sleeve placed on the

  radiator 1 or, as shown in the figure, in a rac-

  cord 9, which can be coupled, by its own thread 10,

  with the threaded bore 11 of the radiator 1.

  The fitting 9, if used, can be a traditional fitting or can also have, on its part 12

  forming a flange, a gasket 13 capable of ensuring the tightness

  chewiness at the level of the surface 14 of the radiator 1 without it being necessary that there are linings on

thread 10.

  The connector 9 can be provided, on its part 12 for-

  mant bride, of a lining 13 made of elastomeric material intended to seal at the surface 14 of the radiator 1 without it being necessary for there to be

fittings on the thread 10.

  At the end of the threaded part 8, the part 4

  has a portion having a cylindrical outer surface

  drique 15 followed by a second thread 16 which is iden-

  tick at thread 8 to facilitate assembly. On the

  thread 16 is mounted a tightening nut 17 which

  carries a cavity 18 containing an annular packing 19 ensuring the sealing at the level of the surface 15 and at

  contact of the surface 20 of the fitting 9.

  The thickness of the annular lining 19 and the pro-

  founder of the cavity 18 which contains it in the nut 17 are chosen in such a way that, during tightening, the surface of the end 21 of the nut 17 strikes the

  surface 20 of fitting 9 or of the threaded element on the

  which part 4 is mounted, compressing the annular packing 19 by the amount necessary to ensure a

suitable sealing.

  These sizing criteria can be validated

  also for the gasket 13 of the fitting 9 in

if it is used.

  The part 4 also includes a cylindrical part.

  that 22 on which are arranged two opposite flats 23

  on which one can engage a key and an annular collar

  area 24 adjacent to the spherical surface 5 against which the part 25 of the threaded nut 26 can abut which can freely rotate on the part 4 and be screwed onto the

valve thread 27 2.

  The assembly device according to the invention allows

  quickly perform the assembly of valve 2 re-

  linked to the corresponding orifice, not shown, to the

  radiator supply manifold 1. Indeed, the rac-

  cord 9 can be mounted on the radiator by tightening the lining 13 fully, without the need to place strips or tow on the lining; in this fitting, we can then screw the part 4 which

  carries the nuts 26 and 17, the latter being complete

  tely moved backwards in contact with the cylindrical part 22 when the radiator 1 and the valve 2 are in their final mounting positions, so as to adjust the screwing depth of the part 4 in the fitting 9 until the spherical surface 5 comes into contact with the conical seat 7. We can then tighten the nut 26 which seals between the part 4 and

valve 2.

  This seal is also ensured in the event of

  surface irregularities of the conical seat 7, as these can be easily compensated for by the

  coating 6 of which the small thickness, which must be

  less than 0.4 mm, however does not change the characteristics

  coupling mating conical 7 and spherical surfaces

  risk 5 in metal. After tightening the nut 26, we

  can tighten nut 17 so as to compress the packing

  ture 19 against the surface 20 by advancing by a quantity which depends on the depth of screwing of the part 4

  in fitting 9 and is between the positions ex-

  liners of the lining 20 on the cylindrical surface 16.

  The nut 18 is tightened until it comes into contact

  tact with the surface 21; this system makes it possible to obtain a constant deformation of the linings and independent of the tightening torque, which also protects the lining itself against any exposure to the action of sources

  bright, which gives them a long life.

  The maximum displacement that part 4 can make

  to compensate for errors in the distance between the ra-

  diator 1 and the valve 2 is given by the distance "L" between the possible extreme positions of the gasket 19 on the cylindrical surface and can vary according to the particular conditions of use by modifying the length of the nut 17 accordingly. the

  distance between thread 16 and surface 22.

  The example described relates to an adjustment valve

  hand, usually placed on the inlet side of the

  tallation; however, it is obvious that the connector group according to the invention can also be mounted on a return valve or on a pressure reducer or on any other device having the same mounting characteristics.

Claims (4)

  1 - Adjustable connection group, especially for the   connection of valves to radiators or devices   similar eyelashes, characterized in that it consists of a hollow part (4) comprising at one of its ends a part having a hemispherical surface   (5) can be coupled with a corresponding conical surface   laying (7) hollow of the valve (2) and associated with screw devices making it possible to tighten the   level of the surfaces and, at its other end, a pre-   first part comprising an external thread (10) followed by a part comprising a cylindrical surface and a second part (8) provided with an external thread, the first part provided with an external thread being able to be introduced into a workpiece '' threaded fastener (11)   carried out on the radiator (1) and the second part file-   tee (8) comprising a nut (17) containing a gasket   annular (13) ensuring sealing at the level of the   tie with a cylindrical surface and against over-   front face of the threaded member when tightening the nut.   2 - connection group according to claim 1,   characterized in that the cylindrical surface of the hollow part (4) extends over a length sufficient to   that it can receive the filling in several po-   different positions corresponding to different screwing distances of the first threaded part (10) in the fitting, the height of the nut (17) screwed on the second   threaded part (8) being chosen accordingly.   3 - Connection group according to one of claims   1 or 2, characterized in that the hollow part (4) has   te in its end part comprising a surface   spherical (5), an elastomeric coating (6) applied   on the hemispherical surface itself.   4 - connection group according to claim 4,   characterized in that this elastomer coating (6) has a   reduced thickness, preferably less than 0.4 mxm.   - Connection group according to one of the claims   1 to 4, characterized in that the seat of the packing of the nut (17) has a depth such that, when this nut is tightened until it comes into contact, by its end surface, with the corresponding fixed part , during assembly, the lining (19) is deformed by an amount   sufficient to ensure watertightness.