QUICK-FIT CONNECTION ASSEMBLY

Abstract

The present invention relates to a quick-fit connection assembly that is unaffected by accidental rotations during installation due to the presence of an innovative connecting element (1) having, in the external threaded region, one or more sliding tracks (3) suitable for coupling with the nozzle (91) of a corresponding washer (9).

Description

The present invention relates to the field of mechanics, in particular to the field of hydraulics, and relates to a quick-adjust connection assembly equipped with anti-rotation means. The assembly is designed to be easily installed on both flat and curved walls. BACKGROUND OF THE INVENTION In the field of hydraulics, there is often a need to connect two spaces separated by a wall to allow the passage of sealed fluids through the wall itself. This occurs, for example, when it is desired to connect the internal compartment of a tank to an external pipe. The aforementioned hydraulic communication is established by obtaining a special seat in the wall and installing a connection assembly in said seat. The connection assemblies traditionally used comprise a tubular-shaped connection element that is externally threaded. The aforementioned assemblies also include two ring nuts to lock the connecting element from opposite sides of the wall. This locking mechanism involves the interposition of a cup gasket between each ring nut and the wall. To install this type of connection assembly, the threaded connecting element must first be inserted through the connection seat. For this purpose, the seat has a passage opening with cross-sectional dimensions equal to or slightly larger than those of the connecting element, but smaller than the cross-sectional dimensions of the ring nuts. Each ring nut is then screwed onto the connecting element until the corresponding cup gasket is pressed against the respective face of the wall. The prior art connection assemblies described above have some significant drawbacks. The main drawback is that they rely on friction between the gaskets and the outer wall to be connected for tightening. Unfortunately, this method is only effective when using flat walls and very soft cup seals, which limits the connection system's application to low-pressure applications. Another drawback during connection installation is that the operator lacks a visual reference from the outside to assess whether the installation has been performed correctly. Consequently, incorrect connection installation only becomes apparent during system testing, leading to substantial intervention costs to reinstall misplaced components, without any guarantee that this intervention will achieve the desired result. Currently, it is not possible to lock the threaded connection element and proceed to tighten it manually or by screwing, since the external threaded portion, which protrudes from the wall of the conduit or tank into which the connection element is inserted, is generally reduced to a few millimeters, and the rest is completely coupled or covered by other components, as shown, for example, in FIGURE 25, which shows a connection assembly according to the present invention, installed in a pipe. This configuration is commonly used because the smaller the external thread, the greater the rigidity of the connecting element, increasing the likelihood of accidental breakage. In fact, the more extensive the external threaded area, the greater the flexing force the connecting element can withstand. Therefore, an accidental impact could cause it to break, resulting in implant failure. To facilitate the use of high-pressure connections or connections for flat or curved walls, solutions have been proposed where the connection assembly includes seals / gaskets with weakening grooves. However, despite the friction present between the contact surfaces, such solutions are not suitable for ensuring proper tightening of the connection to the wall. Furthermore, at high pressures, gaskets with greater hardness than those used at low pressures are required, resulting in a considerable increase in the tightening torques needed to deform the gasket into the sealing position. One consequence of this phenomenon is the inability to install the connection on the wall. BRIEF DESCRIPTION OF THE INVENTION The technical problem that forms the basis of the present invention is to provide a connection assembly that allows for better performance compared to the known technique, overcoming the drawbacks mentioned above. This objective is achieved by means of a connecting element as defined in independent claim 1, a washer according to independent claim 9, and a connecting assembly comprising the connecting assembly and the washer, as defined in independent claim 18. The preferred features of the present invention are the subject of the appended dependent claims. According to a first aspect, the present invention provides a connection assembly not subject to accidental rotations during installation thanks to the presence of an innovative tubular connection element that has, in an external threaded region, one or more sliding portions or tracks suitable for coupling with a protruding element supported by a corresponding washer, the same being part of the present invention. According to preferred aspects of the invention, the sliding portion may be in the form of a groove, or a more extended and substantially flat region, obtained by the absence of material from the external tubular profile of the connecting element. In either case, the sliding portion is shaped to engage with the nozzle of a corresponding innovative washer, which is also the subject of this patent application. The cooperation between the washer, in particular its nozzle, and the connecting element allows the latter to be locked when it is inserted into the conduit or the wall of the tank to be connected, so as to prevent unwanted mutual movements (e.g., rotations). According to another preferred aspect of the invention, the innovative washer has an external pin carrying a terminal end portion provided with the nozzle, the pin being configured to assume an operational configuration, in association with the aforementioned connecting element, wherein the nozzle engages at the stop in the sliding portion of the latter. Once attached to the connecting element, the washer can be further secured with additional external parts, completely preventing rotation of the connecting element and, consequently, the entire assembly relative to the pipe or wall to which it is attached. This ensures that the fluid is diverted from the affected pipe or wall correctly, without any possibility of error. Another advantage achieved by the presence of the nozzle washer in the connection assembly of the invention is the possibility of assembling the connection, already installed on the wall of a conduit or tank, with other components that will be screwed there without the need to use key sockets, and therefore without weakening the structure of the threaded body. Other advantages, features, and methods of use of the present invention will become evident from the following detailed description of various embodiments, presented by way of non-limiting example. BRIEF DESCRIPTION OF THE FIGURES Reference will be made to the attached FIGURES, where: - FIGURE 1 shows a perspective view of a first preferred embodiment of a connecting element according to the present invention; - FIGURE 2 shows a perspective view of a second preferred embodiment of a connecting element according to the present invention; - FIGURE 3A shows a perspective view of a first preferred embodiment of a washer according to the present invention; - FIGURE 3B shows a detail of FIGURE 3A; - FIGURE 4 shows a plan view of the washer in FIGURE 3A, with the pin in its rest configuration; - FIGURE 5 shows a perspective view of the washer in FIGURE 4, with the pin in its operating configuration; - FIGURE 6 shows an enlarged and inverted perspective view of the washer pin of FIGURE 5, in an operational configuration; - FIGURE 7 shows a side view of the washer in FIGURE 3A, with the pin in its rest configuration; - FIGURE 8 shows an enlarged detail of FIGURE 7; - FIGURE 9 shows a perspective view of a second preferred embodiment of a washer according to the present invention, wherein the pin is in its rest configuration; - FIGURE 10 shows a perspective view of the washer in FIGURE 9, where the pin is in its operating configuration; - FIGURE 11 shows a bottom perspective view of FIGURE 10; - FIGURE 12 shows a perspective view of a third preferred embodiment of a washer according to the present invention, wherein the pin is in its rest configuration; - FIGURE 13 shows a perspective view of a fourth preferred embodiment of a washer according to the present invention, wherein the pin is in its rest configuration; - FIGURE 14 shows a perspective view of a fifth preferred embodiment of a washer according to the present invention, wherein the pin is in an operational configuration; - FIGURE 15 shows a perspective view of FIGURE 14, where the washer is in its rest configuration; - FIGURES 16 and 17 show, respectively, a side view and a plan view of a modality of a connection assembly according to the present invention, wherein the washer is in an operational configuration; - FIGURE 18 shows a detail of FIGURE 17; - FIGURES 19 and 20 show, respectively, a side view and a plan view of a connection assembly variant according to the present invention, wherein the washer is in an operational configuration; - FIGURE 21 shows a detail of FIGURE 20; - FIGURES 22, 23, and 24 show, respectively, sequential perspective views of the installation of a connection assembly according to the present invention; - FIGURE 25 shows, in section, the assembly of FIGURE 24 installed on a duct; - FIGURES 26, 27 and 28 show, respectively, a perspective view, a side view and a front section view of another modality of a washer according to the present invention; - FIGURE 29 shows a cross-sectional detail of the washer in FIGURE 26; - FIGURES 30 and 31 show, respectively, a partial perspective view of other preferred embodiments of a washer according to the present invention, with the pin in the rest position; - FIGURE 32 shows a cup packing for a connection assembly compatible with a connection assembly according to the present invention; - FIGURES 33 and 34 show, respectively, a perspective view and a cross-sectional perspective view of a variant of a connection assembly according to the present invention; - FIGURES 35 and 36 show respectively a perspective view and a front view of another modality of a washer according to the present invention; - FIGURE 37 shows a detail of FIGURE 36; - FIGURE 38 is another perspective view of the washer in FIGURE 35, with the pin in the operating position; - FIGURES 39 and 41 show, respectively, a plan view and a perspective view of a preferred embodiment of a tightening nut according to the present invention; - FIGURES 40 and 42 show respectively a side view and a perspective view of the tightening nut of FIGURE 39 coupled with the washer of FIGURE 35; - FIGURE 43 shows a perspective view of another preferred embodiment of a connecting element according to the present invention; - FIGURES 44, 45, 46 show an even more preferred embodiment of a washer according to the invention; - FIGURE 47 shows the coupling between the connecting element of FIGURE 43 and the washer of FIGURES 44, 45, 46; and - FIGURES 48, 49, 50 show, respectively, two perspective views and a side view of an even more preferred embodiment of a pin according to the invention; - FIGURE 51 shows a perspective view of an even more preferred embodiment of a pin according to the invention, comprising the pin shown in FIGURES 48, 49, 50; and - FIGURE 52 shows a perspective view of another variant of the washer modality according to the present invention; - FIGURE 53 shows a perspective view of another preferred embodiment of a connecting element according to the present invention; - FIGURE 54 shows a side view of the connecting element of FIGURE 53; FIGURE 55 shows a top view of the connecting element of FIGURE 53; - FIGURES 56, 57 and 58 are cross-sectional views of an application of the connecting element of FIGURE 53 applied to a duct. DETAILED DESCRIPTION OF PREFERRED MODALITIES With initial reference to FIGURE 1, a first modality of a connecting element according to the present invention is generally indicated by 1. The connecting element 1 is suitable for use as part of a connection assembly according to the present invention, as shown by way of example in FIGURE 24. The connection assembly of the invention allows for the leak-proof passage of fluid through a wall, for example, of a conduit or tank. In particular, the connection assembly of the invention is configured for stable, quick, and correct installation even under high pressure conditions of the fluid being diverted. The connecting element 1 is configured to mechanically couple with an innovative washer included within the connecting assembly of the invention, so that it cooperates with the washer to achieve a highly stable coupling, and that it facilitates a quick and correct installation of the connecting assembly. The connecting element 1 comprises a main body 2 having an overall tubular shape, preferably with a circular cross-section, suitable for allowing the passage of a fluid. The main body 2 extends along a principal longitudinal development direction L, and has a first end portion 4 and a second end portion 5, mutually opposite each other along the aforementioned principal longitudinal development direction L. Said first and second end portions 4, 5 respectively comprise an inlet and outlet section for the fluid that will be diverted through the connection assembly of the invention, when in use. In the first end portion 4, the main body 2 may comprise a flange / tab element 41, intended to couple with a cup packing inserted into the connection element 1 to seal the connection assembly itself when inserted into the wall of the conduit or tank from which the fluid is to be drawn. The main body 2 comprises a lateral external surface 20 having a curved development, depending on the tubular shape of the main body 2 itself, and is at least partially threaded. According to preferred embodiments of the invention, the surface 20 is fully threaded, i.e., it is threaded from the first end portion 4 to the second end portion 5. Alternatively, the threading may stop before the second end portion 5, rendering a terminal portion of the external surface unthreaded, preferably substantially cylindrical. According to a first advantageous aspect of the present invention, the outer surface 20 comprises a first region 3 in which the thread is absent. In particular, the first region 3 is circumscribed within the first outer surface 20. Preferably, the portions of the outer surface 20 adjacent to, or rather surrounding, the first region 3 are threaded. According to an advantageous aspect of the invention, the first region 3 is shaped to make a guide or sliding track and therefore comprises one or more flat walls, which can be achieved by removing one or more portions of rope or by shaping. The first region 3 has an extent that is at least partially flat along the main longitudinal development direction L, i.e., preferably parallel to the aforementioned L direction. According to the embodiment shown in FIGURE 1, the first region 3 may be in the form of a groove or slot, preferably developed in accordance with the main longitudinal development direction L. Even more preferably, the first region 3 extends from the first end portion 4 to approximately half, or %, of the longitudinal extent of the outer surface 20. The remaining portion of the outer surface in the second end portion 5 may be fully threaded to ensure greater strength of the connecting element 1 and greater sealing and strength in the threads of any additional component that may be screwed, in use, onto the connecting element 1. In other words, the first region 3 does not extend along the entire length of the outer surface 20. In this way, the terminal part of the connection can be coupled with other fitting connections to the pipes. Furthermore, the threading affects the entire terminal portion of the outer surface 20, allowing the use of Teflon tape and preventing leaks at the thread, since the operator can always use the same spool of Teflon tape, even when working on connections of different sizes. Essentially, the diameter of the coupling washers between the different parts is not a limiting factor. Alternatively, the first region 3 can extend from the first end-end portion 4 to the second end-end portion 5, i.e., along the entire length of the external region 20 along the longitudinal direction L. Furthermore, the first region 3 can have a greater width with respect to the very small ηηοηηη / Ω7η7 / Β / γΐΛΐ typical of a slot, in particular having the shape of an actual flat wall of the outer region 20. In particular, the first region 3 is configured to create a coupling seat with a corresponding nozzle of an innovative washer, which is also part of the present invention. For this purpose, the washer comprises a through hole defined by an internal surface configured to couple with the aforementioned external surface 20 of the connecting element 1, as will be described in more detail below. The variant of the connecting element 1', shown in FIGURE 2, comprises in particular a first region 3' that extends along the entire length of the external region 20' along the longitudinal direction L, and has the shape of a flat wall. In general, the connecting element 1,1' may comprise other regions of the outer surface 20, 20' that are not threaded and have a preferably reduced extension with respect to that of the first region 3, 3'. For example, as shown in FIGURES 1 and 2, there may be at least a second region 30, 30' of the outer surface 20, 20' where the thread is absent, which has a flat extension in accordance with the main longitudinal development direction L. In particular, the first region 3, 3' and / or any additional region without a slot 30, 30' can be obtained by removing or eliminating material from the main body 2, 2'. Preferably, the first region 3, 3' and / or any additional ungrooved region 30, 30' are set back from the remaining external surface 20, 20'. In other words, considering a modality where the main body 2 has a generally substantially symmetrical shape with respect to a longitudinal development axis L, these first regions 3, 3' and / or the other regions 30, 30' would be radially set back (more internal) from the remaining threaded external surface 20, 20' with respect to axis L, and therefore closer to axis L. In other words, according to various embodiments of the invention, the connecting element, in particular the threaded main body, has a longitudinal groove that serves as a sliding guide and anti-rotation wall for the connecting element itself. The threaded main body can be manufactured by molding or deburring, depending on the material from which it is to be made. The sliding guide function consists of receiving a corresponding nozzle element on a pin supported by an innovative washer according to the present invention, such that rotation of the connecting element, and therefore of the entire connecting assembly, is prevented, even when subjected to tightening torques during installation. This solution ensures the correct installation of a connecting assembly using hard cup gaskets, high-pressure resistant gaskets, or gaskets installed on curved walls, regardless of the hardness of the cup gaskets used. FIGURES 53-55 show another variant of the connection element 1,1', while FIGURES 56 to 58 show an application of the connection element of FIGURE 53, 55 to a duct. With respect to the previous modalities, the flange of element 41, designed to remain inside the duct, has a double curvature and, moreover, does not have a circular outer profile, but rather an oval one. The double curvature has a concavity facing the second end portion 5. For clarity, the profile of flange 41 is oval when viewed from a plane orthogonal to the main longitudinal development direction L. The longer side of the oval should be oriented longitudinally to the duct, the shorter side transversely (see FIGURES 57 and 58, respectively). The correct centering of the threaded body, as well as the orientation, will be adjusted by means of the cup packing and / or by means of the double-curved washers that will be described below. The double-curved oval flange 41 can pass through the through-hole made in the conduit because the cross-section of the body has the same dimensions as the through-hole or slightly smaller, while the longitudinal section, being longer with respect to the through-hole, takes advantage of the spaces X' to be inserted. The dimensions of the oval will depend on the project requirements. The 41 double-bend oval flange enhances the seal at high pressures while also providing a rigid mechanical anchor. Furthermore, it mitigates deformations of the conduit adjacent to the bypass through-hole caused by overpressure. If the hydraulic seal is no longer secure, for example, due to pressure considerably higher than the working pressure declared by the supplier, or due to deterioration of the seals due to temperatures higher than operating temperatures, or other reasons, the mechanical anchor prevents the expulsion of the pipe connection and limits fluid leakage, increasing the safety of the system user. With reference to FIGURES 3 to 8, a first modality of an anti-rotation washer according to the present invention, indicated in general by 9, will now be described. According to a first advantageous aspect, when used in the connection assembly of the invention, the washer prevents the rotation of the connecting element 1,1' that is attached to it, thus preventing the rotation of the entire connection assembly. Washer 9 comprises a main body 90, which has a general annular shape and includes a through hole 92, which develops along a longitudinal direction L which can be an axis of symmetry for the main body 90. According to a first embodiment of washer 9, the latter has a circular plan, wherein the main body has the shape of a circular crown. Substantially, the main body 90 can be in the form of a flat ring, preferably with circular geometry, so that it serves as a bearing between a cup packing and an external tightening nut, which are also preferably parts of the connection assembly of the invention, preventing friction between the two bodies from blocking the advancement of the connection element to the outside of the conduit or tank wall to be diverted, to position itself in a sealing configuration. The main body 90 can be reinforced by the presence of internal ribs, preferably with radial development (as for example in the modality shown in FIGURE 26). With reference to FIGURE 38 (although the following should be considered applicable to any type of washer according to the present invention), on an external surface of the main body that is not engaged during installation of the connection assembly and that will remain visible in use, there may be at least one direction indicator 299, for example in the form of an arrow, to indicate whether the connection assembly is positioned correctly (generally, the connection assembly should be placed along a generatrix of the pipe to which it will be connected). Generally, there are alignment lines on the external surfaces of the pipes. By aligning the direction indicator(s) with the line on the external surface of the pipe to be connected, the positioning will be visually correct. With further reference to FIGURES 3 to 8, preferably the proportions of washer 9 are such that the thickness of the latter, measured along the L direction, is the smallest dimension with respect to its length and width measured in a plane orthogonal to the L direction. The through hole 92 is defined by an internal side surface 93 of the main body 90, which is suitably configured to couple with the external surface 20, 20' of a connecting element 1, 1', as already described. The washer 9 according to the present invention comprises interference means 94 configured to assume: a rest position, where it is located, or rather extends to, a maximum distance from the main body 90, and an operating position, where it interferes at least partially with the through hole 92. Furthermore, the interference means 94 is configured to engage with the first external region 3, 3' of the connecting element 1,1', while the internal side surface 93 of the through hole 92 of the washer 9 is configured to engage with the external part surface 20, 20' of the connecting element 1, 1', in particular with the thread. ηηοηηη / Ω7η7 / Β / γΐΛΐ In particular, the interference means may comprise an interference element, identifiable by the same numerical reference 94, having a preferably elongated shape, preferably in projection with respect to the main body 90 and even more preferably having a principal development direction orthogonal to the longitudinal direction L. In particular, this principal development direction is coincident with or parallel to a development direction in width or length of the main body 90, where said length and width are measured in a plane orthogonal to the direction L. The interference element 94 has a central region 98 connected or connectable in its own first end portion to the main body 90, in particular to an external side surface of the main body 90, while carrying a nozzle element 91 in its own second end portion. Nozzle 91 is configured to engage with the first region 3, 3' external to the connecting element 1, Γ. Nozzle element 91 is preferably provided with a free-end portion, intended to engage with the first region 3, 3', which has chamfered or preferably rounded edges, to prevent it from slipping into the lower portion of the first region 3, 3' and to compensate for machining tolerances. Preferably, the protruding element 94 has a substantially rectilinear development. Even more preferably, the protruding element 94 extends substantially in a plane orthogonal to the longitudinal direction L when the nozzle 91 is in the rest configuration and / or in the operating configuration. According to a preferred variant, the central region 98 has an facilitated folding portion, such that it can be folded upwards to bring the nozzle 91 from a rest position, where it is at a maximum distance from the main body 90, to an operating position, where it interferes at least partially with the through hole 92. Preferably, the washer 9 can be made in a single body comprising the main body 90 and the interference element 94, to avoid handling multiple elements during the storage and assembly phase, as well as to save production costs by making a single mold for the production of the part. The single-body design also has the advantage of allowing quick coupling of the connection assembly, since the interference element 94 is already correctly connected to the main body in its rest position. Furthermore, this configuration allows for automated assembly of the connection assembly, which is simpler and therefore more economical. According to preferred variants of washer 9, the interference element 94 can be movably connected to the main body 90; for example, it can be implemented as a separate element from the main body 90, selectively connectable to it, for example, by interlocking. According to this variant, the main body 90 has a seat shaped to engage with the first end portion of the interference element 94. Preferably, the seat is implemented as a through-hole that completely interrupts the annular development of the main body 90, as shown in detail in FIGURE 3B, where the main body 90 is open-loop shaped. Furthermore, a variant of the main body 90 may provide for the presence of a connecting wall between the two free end portions of the main body 90, in the seat for coupling with the interference element 94. A wall made as described, which therefore makes the configuration of the main body of the washer a closed loop, while corresponding to an annular portion of minimum thickness with respect to the rest of the main body, is denoted by 999 in FIGURE 4. Alternatively, the nozzle seat can be formed within the main body 90 without interrupting the continuity of its annular shape (e.g., Figures 9 to 11). For example, the seat can be in the form of a groove cut into an upper or lower surface of the main body. Preferably, the seat has beveled edges 21, 22, as shown in Figure 3B. In particular, with reference to FIGURE 3A, the interference element 94 may comprise a first and a second portion 96, 97, between which the facilitated folding portion 98 is interposed. The configuration is such that, when the first portion 96 is connected to the main body 90, the second portion 97 can be folded over the first 96, preferably until the second portion 97 abuts the first 96, to bring the nozzle 91 into the operative position. In other words, the central region 98 may comprise a first portion 96 connected to the nozzle 91 at a free end portion, and a second portion 97 connected or connectable to the main body 90, wherein said first and second portions 96, 97 are mutually connected at the facilitated folding portion 98, so that the first portion 96 can be folded over the second portion 97 to bring the nozzle 91 into the operative position. In particular, as shown in FIGURE 6, the second portion 97 may have two projecting side walls or fins 998 opposite a central surface 997 of the portion 97 itself, which run parallel to each other along the outer perimeter of the portion 97. The fins 998 are arranged so that, when the interference element is in an operational configuration and the second portion 97 is folded over the first portion 96, the first portion 96 is interposed or inserted between such fins. In addition, the 998 fins preferably have an internal bevel necessary to prevent jamming with the second portion 96 during the assembly phase. As shown for example in FIGURES 5 and 6, the operating position of the nozzle 91 can allow the latter to be inserted into the same seat of the main body 90 into which the first portion 96 is inserted, and which protrudes with respect to the same seat to interfere within the through hole 92, so as to engage with the connecting element 1,1' when the latter is inserted into the washer 9. With reference to FIGURES 7 and 8, to facilitate handling by operators, the washer 9 may comprise operating means 95 in the second portion 97. The operating means 95 may be in the form of a hole or an eyelet; in other words, they may comprise a through-hole 99 into which the operator can place a finger. Preferably, the through-hole 99 is developed along a direction S orthogonal to the longitudinal direction L when the nozzle 91 is in the operating position, as shown in FIGURE 6. In particular, the operating means 95 may comprise a portion, where the eyelet is obtained, which has a reduced thickness with respect to the maximum thickness of the interference element 94, where the thickness is intended to be measured along the S direction, shown in FIGURE 6. Advantageously, the presence of operating mechanisms facilitates the removal of the connection element from the duct or wall after maintenance. Furthermore, the same eyelet, when installing the connection assembly on ducts, can be used to pass a securing strap through it, wrapping it around the duct and tightening it. In this case, the washer will provide the necessary tightening torque without requiring any additional measures, thanks to the clamp attached to the duct. Preferably, all edges of the operating means 95 are conveniently beveled or rounded to prevent injury to the operator's hands, so that they can be used effectively to manually oppose the tightening torque. Another variant of the pin and washer according to the invention is shown in FIGURES 48 to 51. This additional washer variant is generally designated 119 and has operating means 195 that are thicker than those of the variant described above. In particular, the operating means 195 has a thickness equal to that of the entire portion of the interference element 194 in which it is arranged, to increase the strength of the component itself. With reference to FIGURE 8, it can be seen that the provided folding portion comprises, or preferably consists of, a hinge 198, suitable for allowing the mutual rotation of portions 96 and 97. The hinge 198 is made from a thin layer of deformable material, where in particular the thickness of the hinge portion 198 is at least ten times less than that of the adjacent portions 96 and 97, precisely to allow for its deformability. Although the provided folding portion 198 is thin, according to the embodiment shown, the continuity of the material between the two portions 96 and 97 is ensured. In particular, an angled notch 199 is visible, in which material is removed to create the aforementioned thin hinge 198. Preferably, to more effectively prevent unwanted rotation of both the washer and the connecting assembly once installed, the washer must be held in position by a force equal and opposite to the tightening torque. An outer wall of the operating means provides a prime point for applying this force. The wall should be held in position using a special wrench or simply by gripping it with the fingers. It should be understood that the length of the first portion 96 of the interference element 94, and consequently of the second portion 97, is greater the larger the applied tightening torque is (as is known, with the same applied force, increasing the distance between the two portions increases the torque, which in this case opposes rotation). With reference to FIGURES 9 to 11, 14, 15, and 35 to 38, other embodiments of the washer of the invention are shown, which differ from the one described above because they have, in plan view (i.e., in a plane orthogonal to the longitudinal direction L of the development of the through-hole), a cross-section of polygonal geometry in general, and in particular octagonal, with respect to the external profile of the main body. Preferably, the external profile of the washer, as seen in a view in the plane orthogonal to the longitudinal direction L of the development of the through-hole, is octagonal. The through-hole itself has a circular geometry because, as anticipated, it is intended to accommodate the connecting element 1,1'. Alternatively, the through-hole may have a square or polygonal geometry suitable for insertion into a counterpart that is also polygonal and either unthreaded or partially threaded at the top. With particular reference to FIGURES 14 and 15, a preferred embodiment of washer 144 is shown, comprising an interference element 145 having a cross-shaped configuration, preferably with two dovetail arms, when viewed in plan view, where the cross has a main central element and two side flaps. This achieves a dovetail joint whose parts are further constrained under the tightening torque. The nozzle 147 is formed by means of a terminal portion of the main central element of the cross. According to this embodiment, the interference element 145 is completely detachable from the main body 146 of the washer and, when inserted into the seat formed in the main body of the washer, i.e., when in the operating position, its outer surfaces are arranged to continue the extension of the outer surfaces of the main body of the washer, thus forming a closed annular shape.In such a configuration, the only exception, or discontinuity in the extension of the surface of the main body 146, occurs in the nozzle 147 of the interference element, which protrudes with respect to the internal side surface of the main body 146, occupying part of the through hole in the washer. With reference to FIGURES 35 to 38, a variant of washer 900, with an octagonal planform, is shown. Washer 900 has a track 39 formed on the outer side surface of the main body, in the form of a groove, cleft, or molded slot. The aforementioned track is contained within the upper surface 995 and the lower surface 994 of the washer's main body, which are mutually opposite and preferably parallel, and extends in a direction orthogonal to the axis of the through-hole within the main body. This track 39 provides a key grip for a dedicated tool, not shown. Washer 900 comprises interference means as already described, in comparison with a particular configuration of the nozzle element 901. The nozzle 901 is configured such that, once inserted into the corresponding seat, a portion of it protrudes from the main body of the washer itself, effectively forming a wedge or pin 40. In particular, the wedge 40 may have a through hole 141, which develops along a longitudinal direction K of the interference means 901, which is orthogonal to the axis of the through hole contained in the washer itself (see FIGURE 35). Through hole 141 allows the removal of the interference means 901, when made as a separate body from the main body of the washer, for maintenance or other interventions, by means of a dedicated tool. In particular, the wedge 40 has a variable thickness configuration, preferably with a flat profile that develops in an oblique or inclined direction with respect to the upper or lower surface of the main body of the washer, where the portion of the wedge 40 that protrudes with respect to the main body corresponds to a maximum thickness. The configuration of wedge 40 is such that it prevents the tightening nut shown in FIGURES 39 to 42 from rotating. This rotation could be exacerbated by vibrations present in the machines where the coupling is installed, or by water hammer in the piping. Inadvertent rotation of the tightening nut can lead to a decrease in tightening torque and, consequently, abnormal operation of the installed component. The preferred type of tightening nut, shown in FIGURES 39 to 42, is generally indicated by 300. The tightening nut 300 has a main body shaped like a traditional nut, provided with a threaded through-hole for fitting with a corresponding connecting element. The nut 300 also has a flange portion connected to it on an upper or lower face of the main body, extending primarily in a direction orthogonal to the axis of the through-hole F in the main body of the tightening nut 300. According to the embodiment shown, the flange has, on an external annular surface 301 facing away from the main body of the nut, several teeth 44, forming a preferably fully toothed surface. The teeth 44 are parallel to each other along a plane offset by a predefined distance from the axis of the through-hole F. According to the preferred embodiment shown, each tooth is arranged to have a preferably constant inclination with respect to a perfectly radial direction R. In particular, the tooth profiles are parallel to a plane passing through the axis F and offset from it by a fixed value “δ” (offset / displacement value “δ”). Furthermore, the teeth have a flat but inclined external surface, specifically complementary to the inclined surface of the wedge 40. The number of teeth, their inclination (corresponding to that of the wedge, as well as the projection of the wedge itself with respect to the main body of the washer) and the number of teeth under grip are factors that depend on the torques involved, and are therefore dimensioned by the expert in the field according to them. This configuration is such that the flat and angled walls of the tooth profiles of the tightening nut 300 and the wedge 40 are complementary, ensuring a stable fit between the two components. This, along with the tightening torque applied during the creation of the washer-tightening nut-connecting element assembly, prevents unwanted loosening. Preferably, the coupling between the wedge 40 and the tooth of the tightening nut 300 is achieved by a contact between the two components that is established along the entire length of the tooth, not just at one point. Figures 12 and 13 show a third preferred embodiment of the washer of the invention, which has a main body of variable thickness along the longitudinal direction L. In particular, the main body 90 comprises an upper and / or lower annular surface 24 having a concave, double-curved development, preferably in the form of a saddle. This configuration preferably provides that the thickness of the main body decreases as the distance from a longitudinal development axis T of the interference element (which is preferably an axis orthogonal to the longitudinal axis L of the through-hole in the main body) decreases, considering a configuration in which the latter is in an operative position.That is, the thickness of the main body is less in the portion of the main body where the seat for coupling with the interference element is housed, and in the portion of the main body diametrically opposite to said seat. Preferably, the first and second portions 96, 97 may each have a through-hole 25. These through-holes may be arranged so that, after the two portions have been inverted over each other for the transition to the operating configuration, they overlap to form a single through-hole. A self-tapping screw, designed to be fixed to the conduit or wall to be tapped, may be inserted into this single through-hole to further resist rotation of the connecting assembly. This device can be used to join plastic walls (self-tapping screw) or concrete walls (anchor screws), with a thickness of a few cm. With reference to FIGURES 26 to 34, another embodiment of a washer 335 according to the invention is illustrated, wherein the main body 135 comprises a band connecting element 36, shaped to fit the profile and dimensions of a conduit in which the connecting assembly is installed, in order to further stabilize the coupling. The connecting element 36 is configured to make a mechanical connection, in particular to circumscribe, 'embrace,' or 'wrap' a conduit on which the connecting assembly is installed. For this purpose, the band connecting element 36 has, for this purpose, a first end portion connected to the main body of the washer and a second free end portion. Alternatively, the end portions may be free and constrained in the same manner by a notch or other means.In both cases, the wrapping action is necessary to reinforce the conduit, whether it is made of a deformable material or not. The main body 135 of the washer 335 is further provided with the corresponding locking means, for example, configured as a buckle, to lock the free end portion of the band connecting element 36 in a position where it wraps securely around the conduit to be connected. In particular, the end portion 33 of the band connecting means 36 may have a toothed surface, suitable for engaging with the corresponding buckle supported by the washer 335, which also has a corresponding indentation to improve the stability of the locking mechanism. In addition, the main body 135 of the washer may comprise three ribs 35 to increase its rigidity. FIGURES 30 and 31 show other variations of the washer described above, where the main body has a shape that has a more or less high thickness in the central opening. The present invention further provides a connecting assembly comprising a washer and a connecting element, as already described. An example of this assembly is shown in Figures 16 to 21 and 33, 34, which also illustrate the clearance created between the connecting element and the respective washer once the mutual coupling is established. In particular, FIGURE 32 shows a cup packing also preferably included in the connection assembly of the invention, suitable for coupling with the connection element and disposed, in use, in the opening section of the conduit or tank where the connection assembly is installed. For clarity, FIGURES 22 to 25 further illustrate a preferred embodiment of a connection assembly according to the present invention, according to the installation sequences in a duct. Essentially, all components of the connection assembly of the invention (including the connecting element and the washer) are dimensioned according to the tightening torque and resistance to rotation that they will withstand. With reference to this, it can be foreseen that an anti-rotation washer according to the invention comprises more than one interference element, and in such case the respective connecting element would have corresponding seats for its coupling. Figure 52 shows a variant of the washer in Figure 9, with an octagonal planform, denoted as a whole by the numerical reference 127. The washer 127 has a main body comprising an upper and / or lower annular surface 130 having a concave, double-curved development, preferably in the form of a saddle. Therefore, the thickness of the main body is variable; in particular, it will be possible to identify two pairs of main body portions, for example, each pair comprising diametrically opposed main body portions with respect to a longitudinal axis L' and a transverse axis T', wherein the portions of each pair preferably have the same thickness, and wherein the thickness of one pair is greater than that of the other. The washer 127 in FIGURE 52 is particularly suitable for coupling with the connecting element 1', shown in FIGURE 2. In this coupling, resistance to rotation is achieved by coupling two opposing flat surfaces 134, 135, which partially enclose the through-hole 133 within the washer itself, with the flat walls 3' of the threaded body 1'. In this case, the coupling configuration is such that the clearance between the washer and the threaded body is minimal, as shown, for example, in the plan view of FIGURE 20.The four grooves formed in the inner walls of the through-hole 133 (for example, one of the four grooves is indicated by the numerical reference 136 in FIGURE 52) are an optional but preferred feature of the embodiment described herein, as they prevent the washer from becoming stuck due to the tightening torques against the threaded sides of the respective threaded body. Preferably, the grooves are arranged between back walls that define the opening 133 and have a chamfered profile. In particular, the presence of four walls defining the through-hole 133, two of which are opposite walls, as already described, and are flat, corresponds to the presence of four grooves 136 arranged at the intersection between one wall and the immediately adjacent one. FIGURE 43 shows an additional variant of the connecting element, indicated by 1. This variant provides that the sliding portion, in the form of a groove 48, continues to the second end portion (the end portion opposite the flange) of the connecting element 1. In other words, the groove 48 extends along the entire length of the connecting element 1. The groove is specifically configured to allow the insertion of the interference means of a corresponding washer. In particular, the vane of the connecting element 1 is configured to engage with the washer 57, bearing an integrated nozzle 59 that protrudes into the through hole 58 of the washer itself, as shown in Figures 44 to 46. The resulting engagement is shown in Figure 47. Washer 57 is manufactured as a single piece with nozzle 59, which acts as an anti-rotation pin. The advantage of using this method for washer 57 is that it can be produced by extrusion and then cut to the desired thickness, resulting in significant production cost savings and ease of assembly. Alternatively, the washer can be manufactured by injection molding. It should also be noted that all the variants described above can be combined, and all the elements described can be made as a single piece or as modular units for assembly. The present invention has thus far been described with reference to preferred embodiments. It should be understood that other embodiments relating to the same inventive core may exist, as defined by the scope of protection of the claims set forth below.

Claims

1. A connection assembly (100), characterized in that it comprises: - a connection element (1, 1j) suitable for allowing the passage of the sealed fluid through a wall (P), said connection element (1; 1') comprising a main body (2; 2') having a tubular shape and extending in accordance with a main longitudinal development direction (L), said main body (2; 2') having a first end portion (4) and a second end portion (5) opposite each other along said longitudinal direction (L), and further comprising a curved and at least partially threaded lateral external surface (20; 20j), wherein said external surface (20; 20') comprises a first region (3; 3j) in which the thread is absent; - a washer (9) comprising: a second main body (90) having an annular shape, comprising a through hole (92) extending in said longitudinal direction (L),wherein said orifice (92) is defined by an internal lateral surface (93) of said second main body (90) configured to couple with said external surface (20; 20') of said connecting element (1; 1'), and interference means (94) configured to assume: a rest position, wherein it is at a maximum distance from said second main body (90) and an operational position, wherein it interferes at least partially with said orifice (92), wherein said interference means (94) comprise an interference element (94) connected or connectable to said second main body (90) and having a main development direction orthogonal to said longitudinal direction (L),wherein said interference element (94): has a central region (98) connected or connectable in a first end portion thereof to said second main body (90) and comprises a nozzle element (91) in a second end portion thereof, wherein said central region (98) has a folding portion facilitated so that it can be folded to transport said nozzle (91) from said rest position, wherein said nozzle (91) is at a maximum distance from said second main body (90), to said operating position, wherein said nozzle (91) interferes at least partially with said orifice (92), wherein said nozzle (91) is configured to engage with said first region (3; 3') of said connecting element (1; 1'),the configuration of said washer (9) is such that said interference means (94) is configured to engage with said first external region (3; 3') of said connecting element (1; 1') and said internal side surface (93) is configured to engage with said external surface (20; 20') of said connecting element (1; Γ) when said connecting element (1,1') is inserted into said through hole (92), and the configuration of said connecting element (1; 1j) is such that said first region (3; 3') is configured so as to make a mating seat with said nozzle (91), wherein said first region (3; 3j) has an extension that is at least partially flat along said longitudinal direction (L).

2. The connection assembly (100) according to claim 1, characterized in that said first region (3; 3j) of said connection element (1; 1j) extends from said first end portion (4) to approximately half, or the longitudinal extension of said external surface (20), while the remaining portion of said external surface (20) in said second end portion (5) is fully threaded.

3. The connection assembly (100) according to one of the preceding claims, characterized in that said connection element (1; 1j) comprises a flange element (41) in said first end portion (4), said flange element (41) having an oval external profile and a double curve development with concavity oriented towards said second end portion (5).

4. The connection assembly (100) according to one of the preceding claims, characterized in that said first region (3; 3') of said connection element (1; 1') is groove-shaped.

5. The connection assembly (100) according to one of the preceding claims, characterized in that said interference means (94) of said washer (9) is movably connected to said second main body (90).

6. The connection assembly (100) according to one of the preceding claims, characterized in that said central region (98) of said washer (9) is connected or can be connected in a first end portion thereof to an external side surface of said second main body (90).

7. The connection assembly (100) according to one of the preceding claims, characterized in that said interference element (94) of said washer (9) has a substantially rectilinear development.

8. The connection assembly (100) according to one of the preceding claims, characterized in that said interference element (94) of said washer (9) extends substantially in a plane orthogonal to said longitudinal direction (L) when said nozzle (91) is in said rest configuration.

9. The connection assembly (100) according to one of the preceding claims, characterized in that said central region (98) of said washer (9) comprises a first portion (96) connected to said nozzle (91) and a second portion (97) connected or connectable to said second main body (90), wherein said first and second portions (96,97) are mutually connected in said provided folding portion, so that said first portion (96) can be flipped over said second portion (97) to carry said nozzle (91) in said operative position.

10. The connection assembly (100) according to one of the preceding claims, characterized in that said washer (9) comprises operating means (95) that can be manipulated by an operator in said first portion (96), said operating means (95) comprising an additional through hole (99) that preferably develops in a direction (S) orthogonal with respect to said longitudinal direction (L) when said nozzle (91) is in said operating position.

11. The connection assembly (100) according to one of the preceding claims, characterized in that said washer (9) has an outer profile of octagonal geometry according to a plane orthogonal to said longitudinal direction (L).

12. The connection assembly (100) according to one of the preceding claims, characterized in that said second main body (90) of said washer (9) comprises an upper and / or lower annular surface having a double-curved concave development, preferably in the form of a saddle.

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