Valve for pressurizing a fluid having a safety device

Abstract

A valve (10) of the type for pressurizing a fluid, the valve comprising: a valve member (11) housing an outflow tube (14); blocking means (15) housed in the valve member to block and selectively open a fluid passage in the outflow tube (14); a rod (16) hinged on the valve member (11) and used for actuating the blocking device (15); and a safety device (17) for closing the valve (10), the safety device being mounted on the rod (16) and being rotatable together with the rod (16). The safety device (17) comprises a coupling member (19) rotatably mounted on the rod to move from a disengaged arrangement to an engaged arrangement in engagement with a recess (20) formed in the wall of the valve member (11), in which engagement arrangement the coupling member inserts a coupling end (21) in a snap-fit manner into the recess (20), to hold the rod (16) adjacent to the valve member (11); the coupling member (19) is mounted on the rod (16) to move from the engaged arrangement to the disengaged arrangement by rotation according to the opening rotation of the rod (16).

Description

Technical Field

[0001] This invention relates to a valve for pressurized fluids, having a safety device for closing the valve. This valve is suitable for containers holding compressed gases or liquefied gases at pressures above atmospheric pressure. Background Technology

[0002] Among the related technologies, there are known "soft-opening" valves, which are valves that open gradually. These valves are associated with containers, such as bottles, that are suitable for containing high-pressure technical gases or medical gases, such as oxygen.

[0003] These valves allow for the supply of gas by controlling flow rate and discharge pressure, or the connection of the contents of the pressurized bottle to external accessories or the atmosphere.

[0004] Among these valves, some are known to include: a main member housing an outlet pipe for supplying pressurized fluid, and having an inlet for gas, a lateral outlet for gas, and a valve seat for a blocking device housed within the valve member and configured to block and open the gas passage. These valves typically also include a closing device for a lever configured to actuate the blocking device.

[0005] Related technical document WO2020216897 describes an example of a valve with a shut-off device. In this case, a rod is hinged to a main component, located in the upper end region of the main component, and also includes a safety device comprising a hook rotatably mounted on the rod to engage with a corresponding shaped element on the main component, thereby holding the rod in a position close to the component, representing the valve's closed position. This corresponding shaped element is formed by the upper edge of the cylindrical portion of the main component, and the hook has an end that points downwards (relative to the closed position) to engage with this edge.

[0006] The applicant points out that in the aforementioned literature, the hook has an instantaneous center of rotation located on the rod at a hinged position relative to the rod, thus defining an arm for applying a force different from that of the rod itself. However, the center of rotation for engaging the main body is relatively close to the center of rotation of the rod, which may cause the valve to open unintentionally. Furthermore, to open the valve, the rod rotates in one direction, while the hook on the rod rotates in the opposite direction. Therefore, if the safety hook is not properly engaged with the main component, the rotation of the rod will cause the hook to rotate in the opposite direction if the rod is accidentally pushed open. This drawback is even more pronounced if the valve is not closed by the safety hook.

[0007] The applicant also pointed out that the spring located between the outer wall of the main component and the inner wall of the connecting body (the spring being adapted to facilitate the return of the connecting body and its retention in the closed position) is unprotected and therefore prone to breakage. In the event of this spring breakage, the connecting body will not be retained in the closed position.

[0008] Therefore, valves of known types may experience accidental opening or fail to engage to close the safety device. Without this engagement, the lever can still be easily lifted accidentally, causing the valve to open.

[0009] Another relevant technical document is GB2528920, which describes a valve. Unlike the aforementioned document, it is provided with a hook-shaped member having an upward-pointing end (relative to the closed position), thereby forming a recess that engages with a horizontal portion flush with a spring. The spring constitutes an engaging element adapted to be released to allow the rod to be lifted and the valve to open.

[0010] Regarding the latter solution, the applicant points out that when the spring applies a force sufficient to prevent rotation to the inner surface of the recess at the end of the hook, it will also elastically break under the separation force applied to the rod. Therefore, the system described in this document cannot prevent accidental valve opening, because the valve may be opened, whether intentionally or unintentionally, when an opening force is applied to the rod.

[0011] Another drawback of this technology is that the rod is quite long relative to the size of the valve component and sometimes protrudes downwards and / or outwards to make it easier for the operator to grip the rod with one hand. However, the retaining member of the hook is typically positioned relatively close to the fulcrum of the rod. The combination of forces applied during opening creates complex stresses in the rod, which can lead to rod breakage.

[0012] Furthermore, since both the rod and the opening hook are formed to protrude outwards to assist the operator during disengagement, the rod and the opening hook may be exposed and break or accidentally engage with external objects, which could cause the valve to open unintentionally.

[0013] Therefore, in the relevant technical field, there is still a need for a safety device for closing a valve for pressurized fluid, which has been improved in its structure and actuation to ensure safe use while being convenient for the person in charge to open.

[0014] Other valves equipped with safety systems are described in EP3177857, WO2020 / 216897, US2016 / 153616 and EP3296612. Summary of the Invention

[0015] The object of the present invention is to provide a valve for pressurizing fluid, the valve being equipped with a safety device, and the valve being constructed in terms of structure and function to at least partially overcome one or more disadvantages listed in the related art referenced above.

[0016] Against this background, the object of the present invention is to provide a valve with a safety device that can keep the valve closed while preventing accidental opening of the valve equipped with the safety device.

[0017] Another object of the present invention is to provide a safety device with a limited risk of damage.

[0018] Another object of the present invention is to provide a safety device that, in particular, ensures the safe closure of the valve even if the device is damaged.

[0019] This objective is achieved, and one or more of these objectives are achieved at least in part by a valve of the following type for pressurizing fluids, the valve comprising: - A valve assembly having an inlet and an outlet for fluid, the valve assembly housing an outlet pipe that connects the inlet to the outlet in a fluid-flowable manner. - A blocking device, housed within a valve member, configured to block fluid passages into an outlet pipe and selectively open said fluid passages. - A rod, hinged to the valve member in the region of the hinge axis, is used to actuate the blocking device. - A safety device for closing the valve, which is mounted on a rod and can rotate with the rod about a hinge axis.

[0020] Preferably, the blocking device includes a flexible element adapted to move along an axis in the valve member at least between an open position and a closed position. In the open position, the flexible element allows the flow of pressurized fluid to exit the valve, and in the closed position, the flexible element prevents the flow of fluid through the outlet pipe.

[0021] Preferably, the blocking device includes a valve head adapted to move into sealing contact with the sealing surface of a corresponding valve seat located in the region of the outflow pipe.

[0022] Preferably, the safety device includes a connecting member, which is rotatably mounted on a rod on a rotation axis to move from a separate arrangement to an engaging arrangement that engages with a recess formed on the wall of the valve member.

[0023] Preferably, the connecting member inserts its connecting end into the recess in a snap-fit ​​manner, thereby preferably holding the rod adjacent to the valve member. Preferably, the connecting member is mounted on the rod such that it can be moved from the engaging arrangement to the disengaging arrangement by rotation according to the opening rotation of the rod.

[0024] The applicant observed that the rotation of the connecting member in response to the opening rotation of the lever improves the overall ergonomics of the lever, making valve opening easier; conversely, the same rotation applied to the lever in the direction towards the wall of the valve member causes the connecting member to move into an engagement arrangement with the recess. The lever bears the load on the connecting member during closing rotation, not only through the movement applied by the operator but also through the weight generated by its own rotation, causing the connecting member to descend and downwards, thereby facilitating the rotation of the connecting member through a snap-fit ​​engagement at the engagement end within the recess.

[0025] Preferably, the safety device further includes a resilient return element configured to push the connecting member into the engagement arrangement.

[0026] It should be understood that the resilient return element helps to keep the connecting members in the joint arrangement structure.

[0027] Preferably, the safety device includes a button that can be accessed from the outside of the rod.

[0028] The outer side is opposite to the inner side of the valve component.

[0029] The button is operably connected to the connecting member so that the connecting member is rotated by means of the pressure of the button, thereby moving the connecting member from the joining arrangement structure to the separating arrangement structure by overcoming the elastic force of the elastic return element.

[0030] Thus, the connecting member is protected on the outside from damage to the button. In the event of an impact and button breakage, the connecting member remains intact, ensuring engagement with the recess in the valve member.

[0031] Further preferred but non-exclusive features of the invention are defined below and in the dependent claims.

[0032] According to one aspect of the invention, the safety device is mounted on the rod such that at least the connecting end of the connecting member protrudes from the rod toward the valve member.

[0033] Preferably, the button is made of plastic, and the connecting member is made of metal. Therefore, plastic materials can be used to limit the weight of the device while ensuring the required rigidity of the connecting member, as it will not break during use and will not bend over time.

[0034] According to another aspect of the invention, the button and the connecting member are preferably fastened to the rod about a single axis of rotation.

[0035] The axis of rotation is preferably parallel to the hinge axis.

[0036] Preferably, the button can return from the working position to the resting position, in which the button presses the connecting member into the separate arrangement structure by rotation.

[0037] When the position changes, the button moves in a rotational manner about a rotation axis. Preferably, the button has an inner side in which it can interact with the connecting member, at least during the movement from the rest position to the working position.

[0038] The term "inner side" as used in reference buttons or more generally safety devices also refers to the side pointing towards the valve component in this context.

[0039] According to another aspect of the invention, the elastic return element includes a double torsion spring, the winding axis of which is aligned with the axis of rotation. The double torsion spring is fastened along the axis of rotation and has a U-shaped portion located between the paired windings. This U-shaped portion has a middle straight section and an end, the straight section preferably being parallel to the axis of rotation, and the end being stopped at a rod. The middle straight section serves to return the connecting member and retain it in the engagement arrangement.

[0040] Preferably, the double torsion spring is fastened along the axis of rotation together with the button and connecting member such that a single rotation returns the button and connecting member to the resting position and engagement arrangement. The middle straight portion of the spring is actually used to push the button and connecting member on the inner side of the rod toward the outer side through the elastic return after torsion.

[0041] In some embodiments, the connecting member has a generally L-shaped form and is fastened to a rod in the region of its angled portion, extending from the angled portion in a first portion and a second portion: the first portion can be pushed by a button to move into a separate arrangement structure, and the first portion can be pushed in the opposite direction into a joint arrangement structure by a middle straight portion, the second portion carrying the connecting end.

[0042] Preferably, the connecting member is rotatably fastened to the rod in the angled region about the axis of rotation.

[0043] The two parts of the connecting member are preferably positioned relative to each other at right angles.

[0044] In the inner side region, the button is preferably provided with a groove in which a first part of the connecting member is received. This first part serves as an arm on which the button can be pushed, thereby rotating the connecting member. In this way, the two components can interact at least when the button moves from a rest position to a working position, or when the connecting member moves from an engaging arrangement that engages with a recess in the wall of the valve member to a disengaged arrangement.

[0045] Preferably, the middle straight portion of the spring contacts the first portion of the connecting member and the side of the button, the side of the button defining a groove to receive the portion.

[0046] Preferably, the safety device is installed in a through opening formed in the rod.

[0047] Preferably, the button has an abutting frame that surrounds an opening on the inner side of the lever. In this way, in the resting position, the spring holds the button's frame against the lever while preventing the button from moving away from the outer side of the lever.

[0048] In a preferred embodiment, the safety device is secured to the rod about a rotation axis by a pin, the pin blocking the safety device in the region of the parallel paired walls of the rod through its end and middle portions.

[0049] Preferably, the connecting member has a through hole located in an angled portion of the connecting member, in the region of the through hole, the connecting member is fitted onto a pin between pairs of walls. Preferably, the button has a pair of support elements that straddle the pin.

[0050] Preferably, the double torsion springs are mounted such that the paired coils are partially wound around the pin between one of the support elements and the corresponding wall.

[0051] In some embodiments, a receiving recess for applying a push force to the button is provided on the outer side of the rod, the receiving recess being defined by an adjacent inclined surface portion of the button and the rod preferably close to the opening.

[0052] Preferably, the button also has a protruding portion that defines the edge of the aforementioned recess.

[0053] In this way, when the operator needs to open the valve, he / she can move at least one finger in the recessed area and push the edge to rotate the button.

[0054] Preferably, the button protrudes from the body of the lever on its outer side.

[0055] In some embodiments, the recess has an opening for inserting the coupling end, which points generally downward relative to the valve's arrangement.

[0056] Preferably, the recess extends about an axis that is orthogonal to the second part of the connecting member and parallel to the first part when the connecting member is in a joint arrangement.

[0057] Even more preferably, the recess extends around an axis that is inclined relative to the vertical direction in the valve's arrangement. Attached Figure Description

[0058] Other features and advantages of the invention will be better understood through the description of a preferred, but not exclusive, embodiment of a valve for pressurized fluid according to the invention, illustrated by non-limiting examples in the accompanying drawings, wherein: - Figure 1 This is a perspective view of the valve according to the present invention; - Figure 2 This is a three-dimensional cross-sectional view of the valve according to the present invention; - Figure 3 This is an exploded 3D view of the rod and safety device as roughly viewed from the outside; - Figure 4 This is a perspective view of the rod with safety devices, viewed from the inside. Detailed Implementation

[0059] Referring to the accompanying drawings, the valve for pressurizing fluid according to the invention is generally designated as 10.

[0060] Valve 10 includes valve member 11 having an inlet 12 and an outlet 13 for fluid. Outlet pipe 14 is housed within valve member 11, connecting inlet 12 to outlet 13 in a fluid-flowable manner.

[0061] The valve also includes a blocking device 15, which is housed in the valve member 11 and configured to block and selectively allow fluid passage in the outlet pipe 14.

[0062] A rod 16 is also provided, which is hinged to the valve member 11 in the region of the hinge axis X, and the rod 16 is used to actuate the blocking device 15.

[0063] In a preferred embodiment, valve 10 includes a safety device 17 configured to close valve 10. The safety device 17 is mounted on rod 16 and is rotatable together with rod 16 about the same hinge axis X.

[0064] Figure 2A cross-sectional view of a preferred embodiment of the blocking device 15 is shown. The blocking device 15 generally includes an elastic element that is movable along axis Y in the valve member 11 at least between an open position and a closed position. In the open position, the elastic element is used to allow the flow of pressurized fluid from the valve 10, and in the closed position, the elastic element is used to prevent the flow of fluid through the outlet pipe 14.

[0065] Specifically, the blocking device 15 includes a valve head 18a in a manner known per se, which is adapted to move in a sealing manner against the sealing surface of a corresponding valve seat 18b located in the region of the outflow pipe 14.

[0066] Figure 1 and Figure 2 The image shows the safety device 17 in its mounted state on valve 10, in the following... Figure 3 and Figure 4 The diagram shows a safety device 17 consisting only of a lever 16. The safety device 17 includes a connecting member 19 rotatably mounted on the lever 16 along the rotation axis Z, allowing it to move from a separate arrangement to an engaging arrangement that engages with a recess 20 formed in the wall of the valve member 11. This arrangement is... Figure 2 The layout structure shown.

[0067] Preferably, the connecting member 19 inserts the connecting end 21 into the recess 20 in a snap-fit ​​manner to hold the rod 16 preferably adjacent to the valve member 11.

[0068] The connecting member 19 is mounted on the rod 16 so as to move from the joining arrangement structure to the separating arrangement structure by means of the opening rotation according to the rod 16.

[0069] Advantageously, the safety device 17 also includes a resilient return element 22, which is configured to push the connecting member 19 into... Figure 2 The connection arrangement structure shown.

[0070] Therefore, the elastic return element 22, together with the connecting end located inside the recess 20, helps to retain the connecting member 19 in the connecting arrangement structure.

[0071] Safety device 17 includes a button 23, which is accessible from the outside of lever 16, such as Figure 1 and Figure 2 As shown. The outer side is opposite to the inner side of the valve member 11.

[0072] Button 23 is operatively connected to connecting member 19 so that connecting member 19 is rotated by means of pressure of button 23, thereby changing connecting member 19 from a joint arrangement state to a separated arrangement state by overcoming the elastic force of elastic return element 22.

[0073] Thus, the connecting member 19 is protected on the outer side by the button 23. In fact, the safety device 17 is mounted on the lever 16 such that the connecting end 21 of the connecting member 19 protrudes from the lever 16 toward the valve member 11.

[0074] Preferably, button 23 is made of plastic material, while connecting member 19 is made of metal material.

[0075] Preferably, button 23 and connecting member 19 are fastened to rod 16 about a single axis of rotation Z. This axis of rotation Z is parallel to the hinge axis X of rod 16 on valve member 11.

[0076] Button 23 can return from the working position to the resting position. In the working position, button 23 presses the connecting member 19 into the separate arrangement structure by rotation.

[0077] During the position change, button 23 preferably moves in a rotational manner about the rotation axis Z.

[0078] Figure 4 The safety device 17 mounted on the rod 16 is shown as seen from the inside side of the rod itself.

[0079] It can be noted that button 23 has an inner side, which is also the side pointing towards valve member 11. Within the area of ​​this inner side, button 23 can interact with connecting member 19 at least during the movement from the rest position to the working position, as will be explained more clearly below.

[0080] In the described and illustrated embodiments, the resilient return element 22 includes a double torsion spring 122, the winding axis of the coils 122a of the double torsion spring 122 being aligned with the rotation axis Z. The resilient return element 22 is secured along the rotation axis Z, and the coils 122a of the double torsion spring 122 have U-shaped portions 122b located between the pairs of coils 122a. The U-shaped portions 122b have a central straight portion 122c and an end portion 122d, the central straight portion 122c being parallel to the rotation axis Z, and the end portion 122d being abutted against the rod 16. Specifically, the abutment of the end portion 122d is preferably achieved by inserting the end portion into a corresponding opening in the body of the rod 16. The central straight portion 122c serves to move the connecting member 19 back and retain the connecting member 19 in the engagement arrangement structure, as described below.

[0081] The double torsion spring 122 is fastened along the axis of rotation Z together with the button 23 and the connecting member 19, so that the button 23 and the connecting member 19 return to the rest position and engage the arrangement structure accordingly by a single rotation. The middle straight portion 122c of the spring 122 is actually used to push the button 23 and the connecting member 19 on the inner side of the rod 16 toward the outer side by the elastic return of the spring after torsion.

[0082] Specifically, the connecting member 19 has a generally L-shaped shape and is fastened to the rod 16 in the region of the angled portion 19c of the connecting member 19. A first portion 19a and a second portion 19b extend from the angled portion 19c of the connecting member 19. The first portion 19a can be pushed by the button 23 to move into the separation arrangement structure, and the first portion 19a can be pushed in the opposite direction by the intermediate straight portion 122c to move into the engagement arrangement structure. The second portion 19b carries the connecting end 21.

[0083] The two parts 19a and 19b of the connecting member 19 are preferably positioned at right angles to each other.

[0084] The middle straight portion 122c of the spring 122 is laterally positioned in front of the first portion 19a of the connecting member 19, thereby holding the first portion 19a of the connecting member 19 near the button 23 when the button 23 is in the rest position, and facilitating the engagement arrangement of the connecting member 19.

[0085] In the inner region, button 23 has a recess 24 at its center, in which a first portion 19a of connecting member 19 is received. This first portion serves as an arm, on which button 23 can be pushed, thereby rotating connecting member 19. In this way, the two components can interact at least during the movement of button 23 from a rest position to a working position, or when connecting member 19 moves from an engaging arrangement that engages with a recess 20 in the wall of valve member 11 to a disengaged arrangement.

[0086] For example Figure 4 As shown, the middle straight portion 122c of the spring contacts the first portion 19a of the connecting member 19 and the side of the button 23 that defines the groove 24 for receiving the first portion. Thus, the spring 122 holds the first portion 19a in the position within the groove 24, which facilitates the return of the connecting member 19 to the engagement arrangement and the button 23 to the rest position.

[0087] Preferably, the safety device 17 is installed in the through opening 25 located on the rod 16, such as... Figure 3 The exploded diagram is shown below.

[0088] Button 23 has abutting frame 23a that surrounds opening 25 on the inner side of lever 16. Thus, spring 122 holds the frame 23a of button 23 against lever 16 in the resting position, while preventing the button from disengaging on the outer side of lever 16.

[0089] Safety device 17 is fastened to rod 16 about rotation axis Z by pin 26, pin 26 blocking safety device 17 in the area of ​​paired parallel walls 27 of rod 16 by end portion 26a and middle portion 26b of pin.

[0090] The first part 19a of the connecting member 19 is installed between the two sides of the defining groove 24, and the second part 19b is installed between the two walls 27.

[0091] The connecting member 19 advantageously has a through hole 19d located in its angled portion 19c, in the region of the through hole 19d, the connecting member 19 is fitted onto the pin 26 between pairs of walls 27.

[0092] Button 23 has a pair of support elements 28, through which the button is mounted to straddle pin 26 and is rotatable about axis of rotation Z. A double torsion spring is mounted such that a pair of coils 122a are each partially wound around pin 26 between one of the support elements 28 and the corresponding wall 27.

[0093] In a preferred embodiment, a receiving recess 29 for applying a pushing force to the button 23 is provided on the outer side of the lever 16. The receiving recess 29 is defined by adjacent inclined surface portions of the button 23 and the lever 16 near the opening 25.

[0094] Button 23 also has a protrusion 30, which defines an edge for the aforementioned recess.

[0095] In this way, when the operator must open valve 10, he / she can place at least one finger in the area of ​​recess 29 and push against the edge to rotate button 23 so that it re-enters through the opening partially toward the inside.

[0096] Button 23 protrudes from the body of lever 16 on the outer side.

[0097] The recess 20 has an opening for inserting the connecting end 21, which points generally downward relative to the arrangement of the valve 10.

[0098] Preferably, the recess 20 extends about an axis orthogonal to the second portion 19b of the connecting member 19 and parallel to the first portion 19a. Even more preferably, the recess extends according to an axis that is inclined relative to the vertical direction in the arrangement of the valve 10.

[0099] Preferably, as shown in the example, the rod 16 has a geometry and dimensions that partially cover the pressure gauge 31 recessed into the valve member, thereby improving its visibility relative to other valves of known types.

[0100] It is worth noting that, due to the intended configuration of the safety device, the arm used to apply force to unlock the hook is different from the arm used to open the lever, and the efficiency during unlocking or maintaining engagement is independent of the position of the rotation center relative to the hinge position and rotational position of the lever.

[0101] These advantages are achieved in particular because the separation rotation must occur in the opposite direction to the rotation of the lever, and due to the setting of the elastic return element, accidental rotation of the hook is prevented, and if the elastic return element is damaged, the weight of the lever itself will move it to the closed state.

[0102] If the lever is accidentally forced open, its rotation will be stopped by the hook.

[0103] Furthermore, it is worth noting that the connecting component is protected by the button, ensuring its operability under any circumstances, even if the button breaks. The resilient return element is also protected by the button.

[0104] The button has an advantageous shape for operating the safety device, while the connecting member has an advantageous shape characteristic for connecting with the valve member.

[0105] In the event of a breakage of the elastic return element, the connecting member also tends to remain in the closed position, thereby preventing the rod from being accidentally lifted and thus preventing the valve from opening.

[0106] The elastic element is not installed to elastically yield under the force applied to the rod, but to prevent separation that may occur due to a force applied locally and intentionally above the button.

[0107] The combination of forces applied during opening consists of: a force for compressing the button to enable the separation rotation of the connecting member; and a lifting force for the lever, which can be easily performed with one hand. This combination of forces does not generate complex stresses in the lever that could lead to its breakage.

[0108] Again, it is worth noting that, advantageously, the connecting member does not protrude outwards, thus preventing it from being exposed and breaking or accidentally engaging with external objects. The connecting member is positioned in a manner that is approximately slightly protruding (bas-relief) relative to the principal plane defined by the outer surface of the rod.

[0109] In practice, it has been found that valves with safety devices can ensure safe use, keep the valve closed, and prevent accidental opening, while also ensuring that the person in charge can easily and as required open the valve.

Claims

1. A valve (10) for pressurizing fluid, the valve comprising: - Valve component (11) having an inlet (12) and an outlet (13) for fluid, the valve component (11) housing an outlet pipe (14) that connects the inlet (12) to the outlet (13) in a fluid-flowable manner. - A blocking device (15), which is housed in the valve member (11), is configured to block the fluid passage leading to the outflow pipe (14) and selectively open the fluid passage. - A rod (16), which is hinged to the valve member (11) in the region of the hinge axis (X), the rod (16) being configured to actuate the blocking device (15). - A safety device (17) for closing the valve (10), the safety device being mounted on the rod (16) and configured to rotate together with the rod (16) about the hinge axis (X), The safety device (17) includes: - A connecting member (19) rotatably mounted on the rod (16) on a rotation axis (Z) to move from a separate arrangement to a joining arrangement engaging with a recess (20) formed on the wall of the valve member (11), in which the rod (16) is held adjacent to the valve member (11) by inserting the corresponding connecting ends (21) into the recess (20) in a snap-fit ​​manner, the connecting member (19) being mounted on the rod (16) to move from the joining arrangement to the separate arrangement by rotation according to the opening rotation of the rod (16). - A resilient return element (22), which is configured to push the connecting member (19) into the engagement arrangement. - A button (23) accessible from the outer side of the lever (16), opposite to the inner side pointing to the valve member (11), the button being operatively connected to the connecting member (19) to rotate the connecting member (19) by pressing the button (23), thereby overcoming the elastic force of the elastic return element (22) to move the connecting member (19) from the engaging arrangement to the disengaging arrangement.

2. The valve (10) according to claim 1, wherein, The safety device (17) is mounted on the rod (16) such that at least the connecting end (21) of the connecting member (19) protrudes from the rod (16) toward the valve member (19).

3. The valve (10) according to one or more of the preceding claims, wherein, The button (23) is made of plastic material, and the connecting member (19) is made of metal material.

4. The valve (10) according to one or more of the preceding claims, wherein, The button (23) and the connecting member (19) are fastened to the rod (16) about a single axis defined by the rotation axis (Z).

5. The valve (10) according to any one of the preceding claims, wherein, The button (23) can return from the working position to the resting position, and the button (23) in the working position pushes the connecting member (19) into the separated arrangement structure in a rotating manner.

6. The valve (10) according to one or more of the preceding claims, wherein, The elastic return element (22) includes a double torsion spring (122), the winding axis of the coil (122a) of the double torsion spring (122) is aligned with the rotation axis (Z), and the double torsion spring is fastened along the rotation axis.

7. The valve (10) according to claim 6, wherein, The double torsion spring has a U-shaped portion (122b) located between a pair of coils (122a), the U-shaped portion (122b) having a middle straight portion (122c) and an end (122d), the middle straight portion (122c) being parallel to the axis of rotation (Z), the end (122d) being stopped to the rod (16), and the middle straight portion (122c) being used to return and retain the connecting member (19) in the engagement arrangement.

8. The valve (10) according to claim 6 or 7, wherein, The double torsion spring, together with the button (23) and the connecting member (19), is fastened along the axis of rotation (Z) such that a single rotation causes the button (23) and the connecting member (19) to return accordingly to the rest position and the engagement arrangement.

9. The valve (10) according to the preceding claim, wherein, The middle straight section (122c) is used to push the button (23) and the connecting member (19) toward the outer side at the inner side of the rod (16).

10. The valve (10) according to one or more of the preceding claims, wherein, The connecting member (19) is generally L-shaped and is fastened to the rod (16) in the region of the angled portion (19c) of the connecting member (19). Extending from the angled portion are a first portion (19a) and a second portion (19b). The first portion can be pushed by the button (23) to move into the separating arrangement structure, and the first portion can be pushed in the opposite direction into the joining arrangement structure by the intermediate straight portion (122c). The second portion (19b) carries the connecting end (21).

11. The valve (10) according to one or more of the preceding claims, wherein, The safety device (17) is installed in a through opening formed on the rod (16), and the button (23) has an abutment frame (23a) surrounding the opening on the inner side of the rod (16).

12. The valve (10) according to any one of the preceding claims, wherein, The safety device (17) is fastened to the rod (16) about the axis of rotation (Z) by a pin (26), the pin (26) blocking the safety device (17) in the region of the parallel paired walls (27) of the rod (16) by the end portion (26a) and the middle portion (26b) of the pin (26).

13. The valve (10) according to the preceding claim, wherein, The connecting member (19) has a through hole in an angled portion (19c) of the connecting member, in the region of the through hole, the connecting member is fitted onto the pin (26) between the paired walls (27).

14. The valve (10) according to claim 12 or 13 when claim 6 is referenced, wherein, The button (23) has a pair of support elements (28) straddling the pin, and the double torsion spring is mounted such that the pair of coils (122a) are partially wound around the pin (26) between one of the support elements (28) and the corresponding wall (27).

15. The valve (10) according to one or more of the preceding claims, wherein, A receiving recess for applying a push force to the button is provided on the outer side of the rod, the receiving recess being defined by adjacent inclined surface portions of the button (23) and the rod (16).

16. The valve (10) according to one or more of the preceding claims, wherein, The button (23) protrudes from the body of the lever (16) located on the outer side.

17. The valve (10) according to any one of the preceding claims, wherein, The recess (20) has an opening that points generally downward relative to the arrangement of the valve (10).

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