FR2634537A3 - Casing made from plastic formed of at least three parts for a water distribution pipe elbow and water distribution pipe elbow intended to be fitted with such a casing - Google Patents

Abstract

The casing made from plastic according to the invention comprises a base element 1 including a body of semicylindrical overall shape extended on one side by a perpendicular section also of semicylindrical overall shape; a cover 2 including a body of semicylindrical overall shape extended on one side by a perpendicular section also of semicylindrical overall shape, the base element 1 and the cover 2 forming a casing of cylindrical overall appearance when they are assembled against one another; an end section 3 fitted inside the free end of the bodies of the base element 1 and of the cover 2; and a connection ring 9 provided with a screw thread capable of being screwed onto internal screw threads made in a complementary manner in the end parts of the semicylindrical sections of the base element 1 and of the cover 2.

Description

Plastic boot made of at least three parts for an elbow

  The present invention relates, in general, to fittings for water distribution networks, and in particular to fittings suitable for flexible plastic pipes in distribution networks

  water and hydraulic systems in general.

  The massive use of flexible plastic pipes in hydraulic installations of water distribution networks, and also in central heating and air conditioning systems, has created the need to develop new connection accessories to connect these pipes to water taps and radiator valves. In order to be able to replace a defective plastic pipe section with a new plastic pipe section, it is necessary to cover said plastic pipe with another sheath-type pipe, while allowing it to pass through the same

  coil type sheath permanently installed.

  This makes it possible to repair or replace parts of the network without having to carry out expensive repair work. Until now, it has been necessary to produce fittings, elbows, or similar connecting elements, by means of which it was possible to connect, for example water taps and conventional radiator valves, to the material pipes.

  flexible plastic of smaller diameter.

  To allow the inspection and replacement of the flexible plastic pipe sections enclosed in turns-type sheaths, it has been necessary to install these fittings and these elbows inside a plastic housing - 2- independent, which housing is built into the wall and has one end left free to allow connection with the metal tap or valve. Because they are enclosed inside said plastic housing, the fittings and the metal elbows

  are sufficiently protected against corrosion.

  For example, a plastic housing of this type has been developed, capable of accommodating a metal water distribution elbow. The practical use of these plastic housings made up of a single monobloc element or of two elements, however presents certain drawbacks due to the difficulty of making the necessary connections of the plastic pipe with the coil sheath, of a on the other hand, and with the metal tap or water valve. The disconnection procedure is, if necessary, even more difficult. One of the drawbacks of the above plastic housings intended for water distribution elbows of the prior art, resides in that their structure in one or two parts allows their connection and their use only for a given maximum diameter of the winding sheath, which presupposes the provision of plastic boot shells of different dimensions, to be able to

  adapt to sheaths of different diameters.

  In addition, in the case of a shoemaker in two parts, one of the parts is traditionally pressed against the other, in order to allow their assembly. This results in higher manufacturing costs since this assembly procedure requires materials with greater elasticity and assumes limited manufacturing tolerances. Likewise, this nesting procedure which consists in pressing one of the parts of the plastic case against the other, makes assembly and more particularly disassembly thereof difficult, due to the development of relatively large constraints which are not easy to process manually. This procedure is -3-

also noisy.

  Another drawback of these plastic shoemakers intended for metal water distribution bends of the prior art relates to the dimensions, and in particular the length and the diameter of their internal cavity inside which the elbow fitting of water distribution moves and is extracted, when it is necessary to change

  a section of the flexible pipe.

  Over time, the plastic pipe is generally subject to a hardening process leading to a corresponding loss of flexibility. It can, moreover, undergo modifications of its sinuosities, which makes its extraction difficult. Taking into account the reasons indicated above, it is therefore very important to facilitate a displacement of the metal water distribution elbow as well as of the plastic pipe, by providing the largest possible internal dimensions in length and in diameter. , and avoiding inside the boot the ribs and

  other formations likely to hinder this movement.

  One of the aims of the present invention is to effectively remedy these drawbacks of the prior art, by proposing a plastic casing for a water distribution elbow, comprising at least three parts, adapted to be connected to plastic pipes thanks to a plastic sheath of turns of different diameters, which is of a simple and economical construction in order to appreciably facilitate the assembly and disassembly procedure of all types of water distribution bends, while being subjected to a minimum of functional constraints, in view of a high resistance and a long service life. Another object of the present invention is to provide a metal water distribution elbow comprising interchangeable fittings by means of which it can be mounted on flexible plastic pipes, so that it is possible, if necessary, to easily change fittings defective and use the same main body of metal water distribution elbow with flexible plastic pipes of different diameters. The foregoing, as well as other objects, advantages and features of the present invention,

  will emerge more clearly from the detailed description

  following of preferred embodiments thereof, given by way of non-limiting example with reference to the accompanying drawings in which: Figure 1 is a schematic perspective view of a water distribution bend mounted inside of r. plastic shoemaker which, in accordance with the present invention, is in four parts and is connected to a plastic pipe housed inside a plastic coil sheath; Figure 2 is a schematic perspective view of the base member of the plastic shoemaker of the invention; Figure 3 is a schematic perspective view of the cover of the plastic housing; Figure 4 is a schematic perspective view of the tubular end section of the plastic case; Figure 5 is a schematic perspective view of the metal water distribution bend properly assembled and connected to the flexible plastic pipe covered by a plastic coil sheath; Figure 6 is a schematic perspective view of a plastic ring used, in accordance with the invention, for mounting by bolting the metal water distribution elbow inside the plastic boot;

- 2634537

  Figure 7 is a schematic perspective view of the main body of the elbow, 'metal water distribution; Figure 8 is a schematic perspective view of an accessory connecting the main body of the water distribution elbow with the flexible plastic pipe; Figure 9 is a schematic perspective view of the biconical metal connection ring of the water distribution elbow with the flexible plastic pipe; Figure 10 is a schematic perspective view of the nut used to tighten the main body of the water distribution elbow: Figure 11 is a plan view of the main body of the water distribution elbow; Figure 12 is a side view of the main body of the water distribution elbow; Figure 13 is a front view of the connection accessory of Figure 8; Figure 14 is a plan view of the connection accessory of Figure 8; Figure 15 is a plan view of a rubber sealing ring mounted in the circumferential recess located at the base of the connection accessory of Figure 8; Figure 16 is a sectional view of the ring

rubber sealing; -

  Figure 17 is a side view of the biconical metal connecting ring shown in Figure 9; Figure 18 is another side view of the biconical metal connecting ring of Figure 9; Figure 19 is a plan view of the biconical metal connecting ring of Figure 9; Figure 20 is a front view of the nut connecting the water distribution bend to the flexible plastic pipe, which is visible in Figure 10; Figure 21 is a plan view of the nut of Figure 10; Figure 22 is a sectional view of the plastic ring shown in Figure 6; Figure 23 is a plan view of the plastic ring of Figure 6; Figure 24 is a view showing the rear face of the base element of the plastic shoemaker of the invention; Figure 25 is a side view of the base member of the plastic case; Figure 26 is a side view of the cover of the plastic case of the invention, showing a screw used to screw together the two or three parts forming the case; Figure 27 is a side view of the tubular end section of the plastic boot, shown in Figure 4; Figure 28 is a plan view of the tubular end section of Figure 4; Figure 29 is a longitudinal cross-sectional view of the water distribution elbow housed inside the plastic case of the invention, and connected to a plastic pipe; Figure 30 is a side view of a second embodiment of the tubular end section, comprising perforated side flanges adapted to be assembled simultaneously with two other elements of the plastic case; Figure 31 is a plan view of the second embodiment of the tubular end section of Figure 30; and Figure 32 is a front view of a wrench used to screw the plastic ring which fixedly supports the dispensing orifice of the water dispensing elbow inside the case.

plastic material.

  The various constituent elements, as well as the accessories of the object of the present invention shown in the drawings, will first of all be listed below in the order of their reference numbers which correspond to the numerical references by which they are designated on the drawings:

  1. Basic element of the plastic plastic shoemaker.

  la, b. Vertical lip-shaped sections of the base element 1, which are adjustable by sliding along the sections in

  shape of corresponding lips 2a, b of the cover 2.

  2. Plastic case cover.

  2a, b Vertical lip-shaped sections of cover 2, adjustable by sliding along the lip-shaped sections

  corresponding la, b of the basic element 1.

  3. Tubular end section of the plastic case;

  4. Main body of the water distribution elbow.

  5. Metallic biconical connection ring of the elbow

  water distribution to the flexible plastic pipe.

  6. Connection accessory for the main body of the elbow

  water distribution to the flexible plastic pipe.

  7. Rubber sealing ring.

  8. Main nut of the distribution elbow

  of water against the flexible plastic pipe.

  9. Plastic ring rigidly supporting by bolting the water distribution elbow on the plastic case. at. Shoulder formed at the upper end of the elbow

  metal, to which the plastic ring 9 is applied.

  lob. Circumferential shoulder formed inside the plastic ring 9 and by which the ring 9 is applied against the circumferential shoulder 10a of the metal bend of water distribution. 11. External thread of the plastic connection ring. 11a, b. Internal threads provided respectively at the semi-circular upper end of the base element 1 and at the semi-circular upper end of coating 2 of the plastic housing, o when the base element 1 and the coating 2 are fitted one on the other, a circular upper end opening provided with an internal thread is thus formed in correspondence with the external thread 11 of the ring 9 which is

fitted inside.

  12. A series of diametrically opposite holes distributed in a circle, which are formed in the upper surface of the ring 9 for the purpose of bolting the latter in the threads lia, b of the housing in

plastic material.

  13. Internal thread of the end of the water distribution elbow for connection to a commercial water tap or valve. 14. Circumferential recess of the accessory

  connection 6, where the rubber sealing ring 7 is adjusted.

  15. Flexible plastic pipe.

  16. Plastic sheath with turns, covering the pipe

flexible plastic.

  17a. Widening carried out at the lower end, in shape

  semi-circular, of the basic element 1 made of plastic.

  17b. Widening carried out at the lower end, in shape

  semi-circular, from the cover 2 of the plastic casing.

  18. Screws to assemble two or three components of the

plastic housing.

  18a, b, c. Drilled holes respectively in the side flanges of elements 1, 2 and 3 of the plastic housing and

  in which the screws 18 are engaged.

  19a, b, c. Respective side flanges of elements 1, 2, 3 of

plastic housing.

  20. Holes for bolt mounting on a wall of the flat rear part of the base element of the plastic housing. 21. Structure formed inside the basic element 1, on

  which the water distribution elbow is adjusted.

  22. Semicircular annular extension of the upper end of the cover 2, which encircles the upper end

  semicircular of the basic element 1.

  23. Screwing wrench for the plastic ring 9.

  24. End projections of the lateral branches of the key 23, intended to be introduced into two diametrically opposite holes 12

  of the plastic ring 9.

  Referring to the accompanying drawings, we will now describe certain embodiments of the present invention, given only by way of illustration. In accordance with a preferred embodiment of the invention, the plastic casing inside which is housed the metal water distribution bend 4 connected to the chosen flexible pipe 15 made of plastic material of the hydraulic installation, has a cylindrical overall shape and consists of two semi-cylindrical elements which are more precisely a basic element 1 and a part 2 forming a corresponding cover. The basic element 1 and the cover 2, when assembled, define the configuration

  overall cylindrical of the housing.

  A first characteristic of this shoemaker is that the method of assembly is of an easy implementation which requires no particular effort nor creates any noise. The base element 1 extends to a semi-circular upper part having an internal thread 11a and extending perpendicular to the generally semi-circular longitudinal body of the base element 1, while downwards basic element 1 extends in the form of a semicircle

  with an internal enlargement 17a.

  The cover 2 is further extended upwards by a semicircular part provided with an internal thread lib and which also extends perpendicular to the generally semi-cylindrical longitudinal body of the cover 2. The adaptation of the cover 2 on the element of base 1 is made by a simple mutual contact and by a sliding of a couple of points of the parts in the form of vertical lips la and Ib of the basic element 1 along a corresponding couple of points of the parts in form of vertical lips 2a and 2b of the cover 2, which means that the semi-cylindrical surface of

  the basic element 1 is completely applied to the hemi-

  corresponding cylinder of the cover 2. Following the assembly of the cover 2 on the base element 1 of the plastic casing, the introduction of the metal elbow 4 for water distribution and its connection to the flexible pipe made of plastic 15 provided with the plastic sheath 16, the upper surface, now completely circular of the housing, provided with the internal thread lla, b, is closed by screwing the plastic ring 9 provided with the corresponding external thread 11 In order to ensure firmness in the tightening and possible stabilization using the plastic ring 9, the semi-circular upper end part provided with the internal thread 22a of the cover 2 is extended in a semi-circular form. circular or may have a length greater than a semicircle or else be in the form of a completely circular ring 22 which, following the assembly of the cover 2 s ur the base element i of the case, surrounds the semi-circular upper end part,

  provided with internal thread lia, basic element 1.

  The upper end of the main body 4 of the metal water distribution elbow extends through the central opening of the ring 9 and is provided with an internal thread 13, suitable for the

  connection to a commercial valve or tap.

  Furthermore, the ring 9 has internally a circumferential shoulder 10b (FIG. 22) by means of which it adjusts to a corresponding circumferential shoulder 10a (FIG. 12) formed at the upper end of the main body 4 of the water distribution bend. Finally, the ring 9 is provided with a series of holes 12 diametrically opposite two by two, distributed in a circle. By means of a special metal key 23, shown in FIG. 32, a key which has two lateral branches which can be introduced into any two of these diametrically opposite holes 12, it is then possible to exert a torque in the direction of the needles d 'a watch or in the other direction in order to screw or respectively unscrew the plastic ring 9 and firmly assemble or remove the metal elbow for water distribution. The aforementioned holes 12 of the ring 9 are preferably of circular or square shape, but can have any other desired shape, provided that the "screwdriver" projections 24 of the lateral branches of the key 23 have a complementary shape. The semicircular bases formed at the lower end of the generally semi-cylindrical parts of the base element 1 and of the cover 2 of the plastic case have an interior semicircular enlargement 17a (FIG. 25) and respectively 17b (Figure 26), the end section 3 of the plastic shoemaker fitting inside the circular termination thus formed by the internal circular enlargement 17a, b of the assembled plastic shoemaker. Once stabilized inside this opening, the end section 3 converges into a longitudinal cylindrical section of reduced diameter corresponding to the diameter of the coil sheath 16 (FIGS. 1 and 5) of the flexible plastic pipe. 15. Thus, an end section 3 whose cylindrical base termination has a diameter corresponding to that of the turns sheath used can be alternately used

  with the same plastic case.

  The lower semicircular extensions of the cover 2 and of the base element 1 are provided with two diametrically opposite side flanges 19a and 19b respectively, which are pierced with corresponding concentric holes 18a, 18b. The possible assembly of the lower parts of the two constituent elements 1 and 2 of the plastic shoemaker, made following the adjustment of the third element 3 inside the circular enlargement 17a, b, is obtained

  by bolting the two parts using screws 18.

  An original characteristic of the plastic shoemaker

  proposed is the possibility of exploiting the maximum dimensions -

  when they are left available by the thickness of the walls in which the case is embedded - and therefore of the free space for movement, on the one hand, of the metal elbow and, on the other hand, of the pipe plastic material to be pulled. The aforementioned free space is totally devoid of ribs or other projecting elements which could hinder this movement and has a preferred diameter of 34 to 40 mm and a preferred length of the order of 45 to 55 mm, this length being measured from the end of seat 21 (figure 25) on which the metal water distribution elbow fits into the base element of the plastic casing, to the point where the reduction in diameter begins for the reception of the sheath to spirals. A preferred industrial sample of the plastic housing described above was manufactured with an internal diameter of 38 mm and a length of 50 mm measured from the end of the seat 21 to the point of reduction of the diameter where the diameter is received.

spiral sheath.

  According to an alternative embodiment of the present invention, shown in Figures 30 and 31, the end section 3 of the plastic housing is also provided, at its upper end, with two lateral flanges 19c, diametrically opposite, these flanges being provided in their center with holes 18c in which screws 18 engage, thus making it possible to assemble the three elements

1, 2 and 3.

  The metal elbow for water distribution is preferably made of bronze, in accordance for example with DIN 17660 and, as shown in the accompanying drawings, it comprises a main body 4, a connection accessory 6 with a ring seal 7 housed in a circumferential recess 14 in the upper part of the connection accessory 6, a biconical metal ring 5 and a tightening nut 8 by means of which the main body 4 of the water distribution elbow is connected to the

  flexible plastic pipe 15.

  An original characteristic of the distribution elbow which has just been described is the presence of the independent connection accessory 6 which allows the reception of plastic pipes of different diameters in the same main body 4 of the elbow of

water distribution.

  It goes without saying that the description of the present invention made

  here is given only by way of illustration and has no limiting character. Thus, any modification relating to the dimensions, shape, materials and accessories used in the construction and the assembly process, insofar as it remains within the claimed inventive concept, must be considered as making

part of the present invention.

Claims (7)

  1. Plastic housing for a connector elbow   water distribution line comprising a first and a   second ends, characterized in that it comprises an element   base ment (1) and a cover (2) forming, when assembled, a generally cylindrical housing having first and second ends each delimiting a circular orifice, and allowing, when they are separated, an introduction manual water supply elbow (4)   inside the housing, manual removal of the valve elbow   water distribution (4) out of the housing, the connection of the first end of the water distribution elbow (4) to a water tap, a radiator valve or the like, and the connection of the second end of the elbow distributing water (4) to a flexible plastic pipe (15) coated with a winding sheath (16); an end section (3) comprising a first cylindrical part adjustable inside the circular orifice delimited by the second: end of the housing and a second cylindrical part having a reduced diameter corresponding to the diameter of the coil sheath (16 ); and a connection ring (9) provided with a   external thread (11), this baaue being adjustable in the ori-   circular fice defined by the first end of the housing, its external thread (11i) being able to be screwed on   internal threads (lla, llb) provided in a complementary manner   keep silent in the parts of the base element (1) and the cover   key (2) which are adjacent to the delimited circular orifice -   through the first end of the housing.   2. Plastic housing according to claim   1, characterized in that side flanges (19a, 19b) -dia-   metrically opposite and comprising concentric holes (18a, 18b) are provided on each side of the ends of the base element (1) and of the cover (2) which are intended to receive the first part of the end section (3), screws (18) being provided to connect the base element (1) and   the cover (2) passing through the perçaaes (18a, 18b).   3. Plastic housing according to claim 1 or 2, characterized in that the end section (3) is provided, on each side of its larger diameter portion, with two lateral flanges (19c) diametrically opposite, by through which it can be connected to the base element (1) and to the cover (2), the connection of these three   parts being secured by making their side flanges coincide   rales (19a, b, c,) and their perforations (18a, b, c), and in fact   being able to pass screws (18) in these.   4. Plastic housing according to any one   as in claims 1 to 3, characterized in that the element   base (1) and the cover (2) have a lonaitudinal body of generally semi-cylindrical shape, in that the bodies of the base element (1) and of the cover (2) extend at one of their ends by semi-cylindrical sections of complementary shape, these sections were perpendicular to the bodies which they extended and shorter than them, and in that an assembly without noise and without constraint of the basic element (1) and of the cover (2) is achievable by bringing into contact and by mutual sliding of the base element (1) and the cover (2), the lona of a couple of points   (la, b 2a, b) located on the semi-cylindrical sections.   5. Plastic housing according to any one   of the preceding claims, characterized in that at the   following the assembly of its constituent parts, an internal free space is created to allow movement of the elbow   water distribution (4) and flexible hose   plastic (15), and in that this free space is   provided with ribs and other formations which could hinder this displacement, and has a diameter of approximately 34 to 40 mm and a length, measured from the structure (21) on which the water distribution elbow (4) is adjusted up to '' at the point where the diameter of the end section (3) decreases in order to   receive the groin with turns (16), from about 45 to 55 mm.   6. Plastic housing according to claim, characterized in that the free space provided to allow the displacement of the water distribution elbow (4) and the   flexible plastic pipe (15) attached thereto   corded has a length of 50 mm and a diameter of 38 mm. 7. Metal elbow for water distribution pipe arranged in a plastic casing according to one   any of the preceding claims, comprising a   connection accessory (6) provided with a rubber sealing ring (7) and by means of which its body (4) can be connected to the flexible plastic pipe   (15), a biconical metal ring (5) and a lock nut   rage (8) to screw its body (4) to the flexible plastic pipe (15), the connection accessory (6), the rubber sealing ring (7), the tightening nut (8) and the metal ring (5) being independent and replaceable parts, characterized in that the same body (4) of the water distribution elbow, the same biconical metal rod (5) and the same clamping nut (8 ) can be   used with different connection accessories (6)   designed to be connected to flexible plastic pipes (15) of hydraulic installations of different diameters.