阅读说明：本技术 用于管道等的快速联接器 (Quick coupling for pipes and the like ) 是由 O·康法洛涅里 于 2020-03-26 设计创作，主要内容包括：提供用于管道等的快速联接器的进口,其配置成通过流体连接与接头联接,包括限定中心轴的主体和相对中心轴至少部分居中且适于部分容纳接头的第一通道、可移动容纳在第一通道内的环形密封元件(包括多个适于径向相互移动并限定释放位置和夹紧位置的紧固区段)、部分容纳在主体内的抽出器(可相对于主体沿中心轴移动且适于允许密封元件从夹紧位置到释放位置),其中主体包括限定相对中心轴居中并容纳在第一通道内的至少一个环的阻挡件,密封元件限定在平行于中心轴方向上干扰阻挡件的干扰部分,且紧固区段围绕阻挡件与干扰部分形成的圆形支点旋转,彼此远离,当抽出器或接头通过密封元件时,由于抽出器或接头引起的打开推力而提供释放位置。(Providing an inlet for a quick coupling for pipes and the like, configured to be coupled with a fitting by means of a fluid connection, comprising a body defining a central axis and a first channel at least partially centred with respect to the central axis and adapted to partially house the fitting, an annular sealing element movably housed within the first channel (comprising a plurality of fastening sections adapted to be mutually radially movable and to define a release position and a grip position), an extractor partially housed within the body (movable along the central axis with respect to the body and adapted to allow the sealing element to pass from the grip position to the release position), wherein the body comprises a barrier defining at least one ring centred with respect to the central axis and housed within the first channel, the sealing element defining an interference portion interfering with the barrier in a direction parallel to the central axis, and the fastening sections being rotatable about a circular fulcrum formed by the barrier and the interference portion, away from each other, the release position is provided by the opening thrust caused by the extractor or joint when it passes through the sealing element.)

1. Inlet (2) of a quick coupling (1) for pipes and the like, configured to be coupled to a joint by fluidly connecting (3), and comprising:

-a body (20) defining a central axis (2a) and a first passage (21) at least partially centred with respect to said central axis (2a) and adapted to at least partially house said fitting (3),

-an annular sealing element (4) movably housed within the first channel (21), comprising a plurality of fastening sections (40) adapted to move mutually in a radial direction and defining a release position in which the sealing element (4) allows the joint to move (3) with respect to the inlet (2), and a clamping position in which the sealing element (4) fastens the joint (3) to the inlet (2),

-an extractor (5) partially housed in said body (20), movable along said central axis (2a) with respect to said body (20) and adapted to allow the sealing element (4) to pass from said clamping position to said release position,

-characterized in that the first and second parts are,

the body (20) comprising a stop (22) defining at least one ring centred with respect to the central axis (2a) and housed within the first passage (21),

-the sealing element (4) defines an interference portion (41) with the obstacle (22) in a direction parallel to the central axis (2a), and

-said stop (22) and said interference portion (41) form a circular fulcrum about which said fastening sections (40) rotate, moving away from each other and providing said release position, due to the opening thrust caused by said extractor (5) or said joint (3), when said extractor (5) or said joint (3) passes through said sealing element (4).

2. The inlet (2) according to claim 1, wherein the sealing element (4) comprises a resisting device (42), the resisting device (42) being adapted to resist the transition of the sealing element (4) from the clamping position to the release position, and the sealing element (4) passing from the release position to the clamping position in the absence of the opening thrust.

3. The inlet (2) according to at least one of the preceding claims, wherein the barrier (22) and the interference portion (41) interact at least partially along a plane perpendicular to the central axis (2 a).

4. Inlet (2) according to at least one of the preceding claims, wherein the extractor (5) has a support disc (5a) adapted to abut against the main body (20), the inlet (2) comprising a stop (6) adapted to be inserted between the support disc (5a) and the main body (20) so as to prevent the extractor (5) from moving with respect to the main body (20).

5. Inlet (2) according to at least one of the preceding claims, wherein each of the fastening sections (40) comprises at least one protrusion (40a) adapted to fasten the fitting (3) in the inlet (2) when the fastening element (4) is in the clamping position.

6. Inlet (2) according to at least one of the preceding claims, wherein the projection (40a) comprises a conical upper wall (40b) extending in an oblique direction (4a) with respect to the central axis (2a) and adapted to allow the fastening element (4) to pass from the clamping position to the release position when the fitting (3) is inserted into the inlet (2).

7. Inlet (2) according to at least one of the preceding claims, wherein the extractor (5) is adapted to press against the conical upper wall (40b) so as to provide the opening thrust so as to move the sealing element (4) from the clamping position to the release position.

8. Inlet (2) according to at least one of the preceding claims, wherein the projection (40a) has a lower surface (40c) substantially perpendicular to the central axis (2a) and adapted to block a movement of the fitting (3) along the central axis (2a) when the sealing element (4) is in the clamped position.

9. The inlet (2) according to at least one of the preceding claims, wherein the body (20) comprises a first portion (20a) comprising the stop (22) and a second portion (20b), the second portion (20b) being an annular assembly removably fastened at least partially within the first portion (20a) so that the sealing element (4) is blocked along the central axis (2a) between the stop (22) and the second portion (20b), the extractor (5) being housed within the second portion (20b) and being adapted to move with respect to the second portion (20 b).

10. A quick coupling (1) for pipes and the like, comprising an inlet (2) and a nipple according to at least one of the preceding claims, wherein the nipple (3) has a groove (30) adapted to receive the protrusion (40a) to prevent movement of the nipple (3) with respect to the body (20).

Technical Field

The present invention relates to a quick coupling for pipes and the like of the type specified in the preamble of the first claim.

In particular, the present invention relates to a quick coupling suitable for simplifying, fixing and accelerating the pipe connection and disconnection operations of a pipeline, in order to move fluids without the need to use specific tools.

Background

It is known that the creation of pressurized fluid power lines requires the connection of a pipe to a tank, other pipes or various elements with means suitable for fluidly connecting the pipe to the tank, other pipes or various elements.

Such a device may comprise two parts, at least one of which is made integral with one of the two pipes by means of a suitable solution, such as welding, forcing or band clamps. These components are generally provided with threads adapted to be secured to each other to form the above-mentioned connection.

At present, quick couplings adapted to connect and disconnect two pipes by quick and easy manual operation are becoming more and more popular than the above-mentioned devices. Such couplings generally have two basic elements: an inlet and a fitting adapted to be partially inserted into the inlet.

A first example of a coupling, for example described in the ISO 8434-1:2007(E) standard, involves fastening between a joint and an inlet by the action of a force. In particular, the inlet comprises three elements: a first base body provided with a thread, a nut suitable for engaging with said thread, and a conical element located between said two parts, in a special cavity made in the base body. When the nut is tightened onto the base, the conical element is pressed between the base and the nipple, forming a tightening.

Another type of coupling is formed by a so-called quick coupling. In such couplings, the fitting has a groove or protrusion on an outer surface and the inlet comprises a housing having a cylindrical cavity adapted to receive the fitting. Furthermore, the cavity has a recess in which a plurality of fastening elements are accommodated, which are adapted to move radially due to the elastic O-ring.

Initially, the fitting is inserted into the inlet and the fastening element is pushed into the cavity from the outer surface of the fitting, thereby compressing the resilient ring. When there are grooves or projections on the fastening element, the elastic ring pushes the elements radially, inserting them into the grooves, thus forming a fastening between the joint and the inlet.

Finally, in order to enable the above-mentioned fastening to be released quickly, a slide is provided, the fastening element being disengaged from the groove or projection when the operator manually pushes the slide, thereby allowing the coupling to be separated from the inlet.

The above-mentioned prior art has a number of important disadvantages.

In fact, both types of currently known quick couplings experience rapid degradation.

Indeed, in the first example described above, the tightening and loosening operations are relatively slow, since intervention with a key or the like is required.

Furthermore, fastening by interlocking may become inseparable due to deposition or deterioration of material, and therefore, it is impossible to replace any faulty component. In some cases, even the use of special tools, such as keys, may not be sufficient to remove the fastening.

In a second example, the fastening element may move, causing the quick coupler to be unstable, i.e. not able to withstand significant pressure.

Another problem is due to the fact that the known quick couplings are not suitable for withstanding elevated pressures.

Another problem is that the two types of actuators cannot be interchanged, i.e. it is not possible to couple the joint of one with the inlet of the other.

In order to overcome the drawbacks listed in part, an apparatus has been created, which is described in patent application MI2010a 000772.

This patent application describes a quick coupler comprising an inlet and a fitting, wherein the inlet comprises an outer body defining an annular cavity and a sealing element at least partially housed and movable in the annular cavity; thus, the sealing element comprises a plurality of fastening sections adapted to move mutually in a radial direction and defining a release position in which the sealing element is retracted inside the annular cavity to allow the joint to move with respect to the inlet, and a clamping position in which the sealing element fixes the joint on the inlet; furthermore, there is an extractor which is partially housed in the outer body and is movable in order to move the sealing element from the clamping position to the release position by means of the teeth interposed between the fastening sections.

However, this device also has the important drawback of having to form an annular cavity with a specific shape, including undercuts.

Such undercuts are difficult to machine and result in not only increased complexity of the apparatus, but also increased time and cost required to produce the apparatus.

Disclosure of Invention

In this context, the technical task on which the present invention is based is to develop a quick coupling for pipes and the like that is able to substantially overcome at least some of the drawbacks mentioned.

In the context of the technical task described, it is an important object of the present invention to develop a quick coupling that is reliable and durable. In particular, it is an important object of the present invention that the quick coupler is easy to use and does not deteriorate with use.

Another fundamental object is to obtain a quick coupling suitable to withstand elevated pressures.

Another important object of the invention is that it is at least partially usable for couplings of the type currently known.

Moreover, another object of the present invention is to produce a quick coupling with simplified structure and which, for this reason, is free from machining difficulties and is correspondingly less costly in terms of time and money.

In summary, another task of the present invention is to produce a quick coupling for multiple use that can be used according to at least two different use configurations.

The technical task and the specific objects are achieved by a quick coupling for pipes and the like as claimed in the appended claim 1.

Preferred embodiments are highlighted in the dependent claims.

Drawings

The features and advantages of the present invention are explained in the following detailed description of preferred embodiments of the invention with reference to the drawings, in which:

fig. 1 shows an inlet of a quick coupling for pipes and the like according to the invention, without any joint inserted.

Fig. 2 shows the fitting insertion in the inlet of a quick coupling for pipes and the like according to the invention, in particular when the fitting provides an opening thrust suitable for guiding the sealing element from the clamping position to the release position;

fig. 3 is a fitting inserted in the inlet of a quick coupling for pipes and the like according to the invention, in particular when the sealing element is in the clamping position and is partially housed in the groove of the fitting;

fig. 4 shows the removal of a fitting from the inlet of a quick coupling for pipes and the like according to the invention, in particular when the stop is removed and the extractor provides the required opening thrust to allow the sealing element to pass from the clamping position to the release position; and

fig. 5 shows the completion of the removal of the fitting from the inlet of the quick coupling for pipes and the like according to the invention, in particular when neither the extractor nor the fitting interact with the sealing element and the latter is in the clamping position.

Detailed Description

In this document, when measurements, values, shapes and geometric references (such as perpendicularity and parallelism) are associated with "approximately" or other similar terms (such as "nearly" or "substantially"), they are to be understood as being free of measurement errors or inaccuracies due to manufacturing and/or fabrication errors, and most importantly, free of slight deviations in the values, measurements, shapes or geometric references associated therewith. For example, if associated with a value, these terms preferably represent a difference of no more than 10% of the value itself.

Furthermore, when terms such as "first," "second," "upper," "lower," "primary," and "secondary" are used, they do not necessarily identify an order, relational priority, or relative position, but they may simply be used to more clearly distinguish the different components.

Unless otherwise indicated, the measurements and data reported herein are to be considered to be made in the International Standard atmospheric ICAO (ISO2533: 1975).

Referring to the drawings, a quick coupling for pipes and the like according to the present invention is generally indicated by the numeral 1.

The quick coupling 1 is suitable for quickly connecting two pipes 10 or connecting a pipe 10 to an apparatus such as a compressor, a tank or another similar element in an easily separable manner.

Preferably, the quick coupling 1 comprises an inlet 2 and a nipple 3.

Preferably, the inlet 2 and the joint 3 are configured to be coupled to each other. In particular, they are coupled to each other so as to be fluidically connected.

Preferably, therefore, the inlet 2 comprises a first passage 21, while the joint 3 defines a second passage.

Preferably, the first channel 21 is adapted to receive at least a portion of the fitting 3. Furthermore, the first channel 21 is fluidly connected to the second channel when the inlet 2 and the fitting are fastened to each other.

More specifically, the first passage 21 is adapted to receive the connector 3 through an entrance (inlet mouth). While the second channel comprises an outlet through which the fluid flows from the junction 3 to the inlet (intake)2 and vice versa.

Preferably, the quick coupler 1 forms a hermetic seal when they are coupled.

Preferably, the inlet 2 is fastened to a part of the tank or the like, while the fitting 3 is fastened to the pipe 10.

Preferably, the fitting 3 and the inlet 2 are both substantially cylindrical, but they may define other more square shapes.

Preferably, the inlet 2 comprises a main body 20. Preferably, the body 20 is a tubular element adapted to receive at least a portion of the fitting 3. Thus, the body 20 substantially defines the shape of the inlet 2.

It may be a hollow cylinder, for example having a cross-sectional variation along its extension.

Preferably, the body 20 defines a central axis 2 a.

Preferably, the central axis 2a is the axis about which the body 20 is deployed. Furthermore, when the inlet 2 and the fitting 3 are coupled, they are preferably aligned with each other with respect to the central axis 2 a.

Further, the body 20 defines a first channel 21. In particular, the inner cavity of the body 20 forms a first channel 21. Preferably, the first passage 21 is partially centered with respect to the central axis 2 a.

Furthermore, the first channel 21 is adapted to at least partially accommodate the joint 3.

Thus, the body 20 may be made in one piece, or may comprise multiple elements.

Preferably, the body 20 comprises at least two distinct components.

In particular, the body 20 comprises at least a first portion 20a and a second portion 20 b.

The first portion 20a is essentially a body portion 20 adapted to communicate with the duct 10 or with external equipment. Preferably, the second portion 20b is a body portion 20 adapted to communicate directly or indirectly with the fitting 3.

More specifically, the second portion 20b does not communicate directly with the fitting 3, but it is the first body portion 20, the first body portion 20 accommodating the fitting 3 when the fitting 3 is inserted into the inlet 2. The second portion 20b thus forms the inlet of the inlet 2.

Preferably, the first portion 20a and the second portion 20b are removably secured.

For example, they may comprise threads that allow the second portion 20b to be screwed into the interior of the first portion 20 a.

Preferably, on the outside, when the fitting 3 is inserted into the inlet 2, the fitting 3 has a substantially cylindrical coupling surface and the axis substantially coincides with the central axis 2 a. Furthermore, the coupling surface is preferably also continuous, i.e. without projections or other similar elements, except for one single discontinuity.

In practice, the joint 3 preferably comprises a groove 30. The groove 30 forms the discontinuity described above and is substantially asymmetric and formed at a predetermined distance from the outlet.

It also has a contrast surface 3a, which contrast surface 3a is close to the outlet, substantially perpendicular to the central axis 2 a.

Preferably, the inlet 2 further comprises a sealing element 4. Preferably, the sealing element 4 is annular and is movably housed inside the first channel 21.

More specifically, the sealing element 4 is also preferably partially movable in a radial direction with respect to the central axis 2a, preferably having an approximately circular shape.

Preferably, the sealing element 4 is inserted inside the body 20, so that it is substantially surrounded by the latter.

Advantageously, the sealing element 4 comprises a plurality of fastening sections 40. The number of fastening sections 40 is at least two, but can also be greater. Preferably, conveniently six in number.

In any case, the fastening sections 40 are preferably adapted to move relative to each other in a radial direction with respect to the central axis 2 a.

Thus, by means of the possible movement, the fastening section 40 defines at least a release position and a clamping position.

Preferably, in the release position, the sealing element 4 allows the joint 3 to move with respect to the inlet 2. Preferably, in the clamped position, the sealing element 4 secures the fitting 3 to the inlet 2. Thus, in the clamped position, the fitting 3 is substantially locked on the inlet 2.

More specifically, the moving mechanism is formed by the interaction between the sealing element 4, the inlet 2 and the joint 3.

Advantageously, in this respect, the body 20 comprises a stop 22.

Preferably, the stop 22 defines a ring centred with respect to the central axis 2a and housed inside the first passage 21.

More specifically, the obstacle 22 defines a narrowed portion of the first passage 21, wherein this portion evaluates perpendicular to the central axis 2a, so as to prevent the advance of the sealing element 4 beyond the obstacle 22.

Advantageously, the sealing element 4 in turn defines an interference portion 41.

Preferably, the interference portion 41 interferes with the stopper 22 in a direction parallel to the central axis 2 a. Thus, the interference portion 41 may be an annular portion of the sealing element 4 defining a diameter that is greater than or equal to the barrier 22.

Further, at least a portion of the interference portion 41 may be located on the stopper 22. Indeed, it is preferred that the obstacle 22 and the interfering portion 41 interact at least partially along a plane perpendicular to the central axis 2 a.

More specifically, the interference portion 41 is defined by a portion of the fastening section 40.

Indeed, preferably, the blocking member 22 and the interference portion 41 preferably form a circular fulcrum about which the fastening section 40 rotates. Thus, each fastening section is substantially rotated away from or towards the central axis 2 a.

In this way, i.e. by rotating, the fastening sections 40 are moved away from each other, thereby forming the release position.

Preferably, the release position is reached, in particular due to the opening thrust provided on the fastening section 40.

Thus, during the transition from the release position to the clamping position, the distance between the fastening sections 40 decreases, with a corresponding decrease in the diameter of the sealing element 4.

In particular, the distance between the fastening sections 40 is reduced by the resistance means 42.

The sealing element 4 comprises said resistant means 42.

Preferably, the resisting means 42 are adapted to oppose the transition of the sealing element 4 from the clamping position to the release position.

More preferably, the resisting means 42 is an elastic means. Preferably, therefore, when the above opening thrust is not present, the sealing element 4 is turned from the release position to the clamping position thanks to the resisting means 42.

The resistance means 42 may consist of a spring or other resilient element, such as an O-ring or otherwise.

Preferably, the resistant means 42 externally surround the sealing element 4.

Thus, the resisting means 42 may be substantially annular and arranged inside the housing on the outer edge of each fastening section 40 (i.e. the edge furthest from the central axis 2 a).

Furthermore, resistance device 42 is preferably adapted to occupy practically the entire height of the casing, calculated in a direction parallel to central axis 2a, to ensure correct positioning of resistance device 42 and prevent undesired movements thereof.

Even more specifically, and as suggested, the resisting means 42 comprise a metal helical spring, preferably made of steel. Preferably a helical spring, the ends of which are straight to prevent their insertion between the two fastening sections 40 when the sealing section is in the release position and thus prevent return to the clamping position. In particular, the end is tangential to the circumference defined by the spring in the rest position.

Finally, each fastening section 40 preferably has a projection 40a on the face close to the central axis 2 a.

Preferably, in the clamping position, the projection 40a is adapted to be inserted into the slot 30 to mutually lock the fitting 3 to the inlet 2, while when it is moved to the release position, it exits the above-mentioned slot 30, allowing a mutual movement between the fitting 3 and the inlet 2.

Therefore, preferably, in the quick coupling 1, the groove 30 is adapted to receive the projection 40a so as to lock the movement of the joint 3 with respect to said body 20.

The projection 40a has a conical upper wall 40b, which conical upper wall 40b advantageously extends according to an inclined direction 4a inclined with respect to the central axis 2 a.

In particular, the tapered upper wall 40b is preferably adapted to allow the fastening element 4 to move from the clamping position to the release position, for example when inserting the fitting 3 into the inlet 2. In particular, when the fitting 3 is inserted into the inlet 2, it presses directly or indirectly against the tapered upper wall 40b, determining the rotation and relative mutual moving away of the fastening sections 40, allowing the fitting 3 to be fully inserted. In particular, the inclination direction 4a may be inclined with respect to the central axis 2a by an angle substantially smaller than 45 ° and more preferably between 25 ° and 35 °.

Furthermore, the projection 40a defines a lower surface 40c, almost perpendicular to the central axis 2a, adapted to interact with the contrast surface 3a of the groove 30. In the direction of removal of the joint 3, this geometry brings the lower surface 40c into abutment against the contrast surface 3a, preventing removal and tightening of the joint 3 into alignment with the axis 2 a.

Furthermore, the inlet 2 comprises an extractor 5.

Preferably, the extractor 5 is partially housed in the body 20.

Furthermore, the extractor 5 is preferably movable along the central axis 2a with respect to the main body 20. In particular, the extractor 5 is adapted to allow the sealing element 4 to pass from the clamping position to the release position. To this end, extractor 5 is preferably adapted to provide an opening thrust on fastening section 40 to allow release of slot 30 of joint 3 and to allow removal of joint 3.

Preferably, the extractor 5 is an annular element having at least one tapered portion.

Preferably, the tapered portion is adapted to interact with the sealing element 4. In particular, the tapered portion interacts with the tapered upper wall 40b of the fastening section 40 and may be substantially complementarily shaped.

Thus, when in use, the extractor 5 acts like a sort of wedge suitable for opening the sealing element 4.

Preferably, therefore, the opening thrust is provided both by the extractor 5 and by the joint 3. In particular, the opening thrust is provided by the joint 3 when the joint 3 is inserted into the inlet 2. Instead, the extractor 5 provides an opening thrust when the fitting 3 is in the inlet 2 and the fitting 3 is intended to be removed. In this step, the extractor 5 applies the thrust required to open the sealing element 4, so as to be able to remove the joint 3.

Therefore, normally, when the extractor 5 or the joint 3 passes inside the sealing element 4, the blocking member 22 and the interference portion 41 form a release position due to the opening thrust provided by the extractor 5 or the joint 3.

It is important to specify that the transition from the release position to the clamping position is made after the insertion of the joint 3, since there is no opening thrust when the slot 30 passes through the fastening section 40 and the fastening section 40 is inserted into the slot 30 (in particular the projection 40 a).

Preferably, from a constructional point of view, the extractor 5 is therefore an element substantially interposed between the body 20 and the joint 3.

Preferably, extractor 5 is inserted directly into second portion 20 b.

Thus, the second portion 20b is adapted to substantially house the extractor 5 and the joint 3, while the first portion 20a houses the sealing element 4 and comprises the stop 22.

The sealing element 4 is preferably an element that can be removed from the first channel 21, for example by sliding.

Preferably, the second portion 20b is an annular component, which is removably fastened at least partially inside the first portion 20a, as previously described, so that the sealing element 4 is locked between the first portion 20a and the second portion 20 b. More specifically, the second portion 20b locks the sealing element 4 along the central axis 2a between the barrier 22 and the second portion 20 b.

Again, in detail, the extractor 5, preferably housed inside the second portion 20b, is adapted to move with respect to the second portion 20 b.

Nevertheless, the extractor 5 is adapted to move with respect to the main body 20 in a direction almost parallel to the central axis 2 a.

Further, the extractor 5 has a support tray 5a at a base outside the main body 20.

Preferably, the support disc 5a is adapted to abut against the upper edge of the body 20, in particular the upper edge of the second portion 20b, when the extractor 5 is pressed against said body 20.

In addition to the above-mentioned parts, the inlet 2 comprises a stop 6 suitable for being inserted between the fitting 3 and the inlet 2, between the support disc 5a and the main body 20 (in particular, the second portion 20b), to prevent the extractor 5 from moving with respect to the above-mentioned main body 20.

Preferably, the stop 6 forms a collar.

It may be an open elastic ring, i.e. an incomplete circumference thereof, more specifically a seger ring (seger ring) or the like.

However, it can be any element, but also a rigid element, which can be inserted and removed on command from extractor 5.

In a preferred embodiment, the joint 3 may comprise, on its outer surface, a groove suitable for housing a sealing element, such as an O-ring, suitable for ensuring the sealing of the fluid coupling 1.

Alternatively, the inlet 2 may comprise an O-ring or other similar device adapted to ensure sealing of the fluid coupling 1. Advantageously, the O-ring, if present, is at least partially housed in a cavity suitably made in the body 20.

In this case, the O-ring of the joint is adapted to abut against a portion of the first passage 21 to hermetically seal it. In particular, the O-ring may abut the narrowing cross section of the first channel 21.

The operation of the above-described quick coupler 1 for pipes and the like is described below in structural form.

Once the pipe 10 has been fastened to the fitting 3 and the inlet 2 has been fastened to the device, the fitting 3 is inserted into the inlet 2, thereby mutually fastening the above-mentioned components.

The tab 3 crosses the extractor 5 and rests on a projection 40a of the fastening section 40. The joint 3 therefore starts to press on the aforesaid projection 40a, providing an opening thrust, determining the transition from the clamping position to the release position of the sealing element 4.

In particular, the fastening sections 40 are moved away from each other, i.e. the sealing element 4 increases its diameter, and the fastening sections 40 rotate about the fulcrum formed by the stop 22 and the interference portion 41, allowing the insertion of the joint 3 to be completed. In particular, the fitting 3 continues its travel, contacting the O-ring, deforming it and forming a fluid seal, or the O-ring of the fitting 3 contacts a portion of the body 20, deforming it and forming a seal.

When the joint 3 is fully inserted, the absence of opening thrust due to the presence of the slot 30 substantially faces the fastening section 40.

The latter is therefore pressed against by the resisting means 42 which push the projection 40a into the above-mentioned groove 30, fastening the joint 3 on the inlet 2 and returning the sealing element 4 to the clamped position.

Thus, the sealing element 4 axially compresses the joint 3, centering it along the axis 2 a.

Furthermore, before locking, it is preferable to insert the stopper 6 between the support disc 5a and the main body 20 to prevent the extractor 5 from moving, thereby avoiding undesired loosening of the quick coupler 1.

When it is desired to disconnect the quick coupling 1, i.e. to disengage the coupling 3 from the inlet 2, the stop 6 is detached from its housing and the extractor 5 is lowered, bringing the support disk 5a almost into contact with the main body 20, in particular with the second portion 20 b.

The movement of the extractor 5 determines the transition of the sealing element 4 from the clamping position to the release position, i.e. the exit of the projection 40a of the fastening section 40 from the groove 30, allowing the removal of the joint 3 from the inlet 2.

Again due to the resisting means 42, after removal of the joint 3, the sealing element 4 returns to the clamping position, in which the fastening sections 40 converge towards each other.

The quick coupling 1 for pipes and the like according to the present invention has important advantages.

In fact, the quick coupling 1 can improve the service life and reliability.

In fact, the configuration of the sealing element 4, and in particular the movement of the fastening section 40, can avoid damage, which reduces the grip between the joint 3 and the inlet 2.

Another advantage is therefore represented by the particular geometry of the coupling between the joint 3 and the inlet 2. Thus, the quick coupling 1 is able to withstand pressures of up to 350 bar.

Furthermore, the quick coupler 1 has a simplified structure and an operating mechanism of the sealing element 4, which operating mechanism of the sealing element 4 is defined by a simple element such as the stopper 22. The barrier 22 has no undercuts and therefore can be produced without special handling. Thus, the quick coupling 1 is easy to manufacture and reduces time and production costs with respect to prior art quick couplings.

In summary, the quick coupling 1 allows different fastening configurations to be adopted, since it is possible, if necessary, to use only the first portion 20a and fasten, for example, the second portion 20b directly to a groove with compatible fastening means (for example, threads).

Changes may be made to the invention described herein without, however, departing from the scope of the inventive concept defined in the claims.

In this case, all the details may be replaced with equivalent elements, and the material, shape and size may be any.