Locking ball valve

Abstract

The locking ball valve comprises a valve body, a valve rod, a limiting assembly and a locking assembly, the valve body comprises a main pipe part and a convex neck fixed to the main pipe part, the valve rod is arranged on the convex neck in a penetrating mode, the limiting assembly comprises a limiting part arranged on the valve rod and an annular limiting section arranged on the convex neck, and the locking assembly is arranged on the limiting part. A bulge is arranged on the annular limiting section, the limiting part can rotate in the annular limiting section, and the limiting part and the bulge are rotationally limited; the locking assembly comprises an elastic piece, a magnetic pin, a magnetic pin hole and a locking hole, and in the unlocking state, the magnetic pin is located in the magnetic pin hole; in a locking state, the magnetic pin is located between the magnetic pin hole and the locking hole at the same time. The limiting assembly can be directly assembled, additional trepanning is not needed, machining procedures are simplified, production efficiency is improved, and the percent of pass of finished products is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of water technology, and in particular to a simple and low-cost locking ball valve. Background Technology

[0002] Patent 202121483090.6 discloses a magnetic lockable ball valve with opening and closing limit, which includes a ball valve body and a mounting tube protruding from the top of the ball valve body. The valve stem of the ball valve body is rotatably and sealingly installed in the mounting tube. A limit pin and a limit arc groove are respectively provided between the outer circumferential surface of the valve stem and the inner circumferential surface of the mounting tube. The limit pin is movably fitted in the limit arc groove. The forward and reverse rotation of the valve stem drives the limit pin to slide back and forth in the limit arc groove, thereby limiting the rotation angle of the valve stem.

[0003] The mounting tube has a locking hole on its inner circumferential surface, and the valve stem has a mounting hole and a locking magnetic block disposed within the mounting hole on its outer circumferential surface. The locking magnetic block can move outward to engage between the mounting hole and the locking hole, or move inward to retract into the mounting hole and disengage from the locking hole. The mounting hole contains an elastic element that pushes the locking magnetic block outward and engages it between the mounting hole and the locking hole. To prevent the locking magnetic block from falling off, a protective sleeve is fitted over the mounting tube for secure fixation.

[0004] Considering that the aforementioned locking ball valves are typically made of copper, this structure ensures that the mounting tube (neck) has a small diameter and the protective sleeve has a very thin wall thickness. Therefore, a large amount of copper material can be saved during mass production, ensuring that it has a low manufacturing cost and strong market competitiveness.

[0005] However, the above structure also suffers from problems such as cumbersome processing steps, high precision requirements, and low production efficiency. For example, it adds at least the following two processing steps:

[0006] 1) Install a limiting arc groove on the installation pipe. In order to ensure the 90° limit of the ball valve, the limiting arc groove must be machined with a 90° central angle. In actual machining, there are often large tolerances, which affect the pass rate of the ball valve.

[0007] 2) The limiting pin is fixedly inserted into the valve stem. In actual machining, a positioning hole needs to be opened on the valve stem, and the limiting pin is fixedly inserted into the positioning hole. In order to ensure effective cooperation with the limiting arc groove, the positioning hole must be opened in an accurate position, which undoubtedly increases the machining difficulty. Utility Model Content

[0008] This utility model provides a locking valve, the purpose of which is to overcome the problem of low production efficiency in the existing technology.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] A locking ball valve includes a valve body and a valve stem. The valve body includes a main pipe and a protruding neck. The protruding neck is fixed to the main pipe, and the valve stem passes through the protruding neck. The valve also includes:

[0011] The limiting assembly includes a limiting part disposed on the valve stem and an annular limiting section disposed on the protruding neck. The annular limiting section is provided with a protrusion, and the limiting part can rotate within the annular limiting section and is rotatably limited by the protrusion.

[0012] At least one locking assembly, the locking assembly including an elastic element, a magnetic pin, a magnetic pin hole and a locking hole, the magnetic pin hole being opened on the side of the valve stem or the protruding neck, and the locking hole being opened on the opposite side of the magnetic pin hole, the elastic element being installed in the magnetic pin hole, in the unlocked state, the magnetic pin being located in the magnetic pin hole; in the locked state, the magnetic pin being located simultaneously between the magnetic pin hole and the locking hole.

[0013] In the recommended embodiment, the magnetic pin hole is located on the side of the valve stem, and the locking hole is located on the side of the protruding neck. This embodiment has a compact structure and, while ensuring reliability, minimizes the wall thickness of the protruding neck, thus resulting in lower cost and ensuring market competitiveness.

[0014] In the recommended embodiment, the annular limiting segment has two protrusions symmetrically arranged at its center, and the limiting part is rotatably limited between the two protrusions. Compared to a single protrusion, the structure with two protrusions has higher structural reliability.

[0015] In the recommended embodiment, the limiting part is located at the top of the valve stem. This facilitates processing and has the most reasonable layout, allowing the rotating groove to be directly formed in the limiting part.

[0016] In the recommended embodiment, a rotating groove is provided in the middle of the limiting part. The rotating groove is used to mechanically cooperate with the magnetic key, so that the magnetic key can smoothly drive the valve stem to rotate.

[0017] In the recommended embodiment, the annular limiting segment is located at the top of the protruding neck. Considering that the valve body is typically integrally formed by forging, placing the annular limiting segment at the top of the protruding neck facilitates forging.

[0018] In the recommended embodiment, the radial cross-section of the protrusion has intersecting first and second sides, with the included angle between the first and second sides being 90°. During rotation, the limiting reliability is high, ensuring precise opening / closing of the ball valve.

[0019] In the recommended embodiment, the locking hole is a through hole, and the locking ball valve further includes a protective sleeve, which is fixedly fitted over the protruding neck and covers the locking hole. The protective sleeve prevents the magnetic pin and elastic element from coming out.

[0020] In the recommended embodiment, the protective sleeve is interference-fitted and fixed to the outside of the protruding neck; or, the protective sleeve is glued to the outside of the protruding neck. Using these fixing methods, the protective sleeve can have a relatively thin wall thickness while ensuring structural reliability.

[0021] In the recommended embodiment, two sets of locking components are included, and the valve stem has two magnetic pin holes, which are coaxially arranged. This structure significantly improves the reliability of the locking mechanism and ensures product quality.

[0022] The beneficial effects of this utility model are:

[0023] The limiting component of this utility model can be directly assembled without additional drilling, which not only simplifies the processing steps and improves production efficiency, but also significantly improves the finished product qualification rate.

[0024] The limiting and locking components of this invention have a compact structure and low cost. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 in the open state.

[0026] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the central axis.

[0027] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 in the closed state.

[0028] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along the radial direction.

[0029] Figure 5 This is a three-dimensional structural diagram of the valve body in Embodiment 1.

[0030] Figure 6 This is a three-dimensional structural diagram of the valve stem in Example 1.

[0031] Figure 7 This is a cross-sectional structural diagram of Example 2.

[0032] Explanation of reference numerals in the attached figures:

[0033] Valve body 1, main pipe 11, protruding neck 12, protrusion 120, annular limiting section 121, first side 122, second side 123, valve stem 2, limiting assembly 3, limiting part 31, arc edge 311, straight edge 312, magnetic key 4, insertion part 41, magnetic steel sleeve 42, unlocking magnet 420, elastic element 51, magnetic pin 52, magnetic pin hole 53, locking hole 54, protective sleeve 6, magnetic pin hole 53′. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] Example 1

[0039] Reference Figure 1 A locking ball valve includes a valve body 1, a valve stem 2, a limiting component 3, a magnetic key 4, and two sets of locking components. The valve body 1 includes a main pipe 11 and a protruding neck 12. The protruding neck 12 is fixed to the main pipe 11 and communicates with it. In this embodiment, the main pipe 11 and the protruding neck 12 are integrally formed by forging.

[0040] Continue to refer to Figure 1 and Figure 2The limiting component 3 includes a limiting part 31 disposed on the valve stem 2 and an annular limiting segment 121 disposed on the protruding neck 12. In this embodiment, the protruding neck 12 (including the annular limiting segment 121) is integrally formed with the main pipe part 11. (See also...) Figure 5 The annular limiting segment 121 is located at the top of the protruding neck 12. The annular limiting segment 121 is centrally symmetrically provided with two protrusions 120. The radial cross-section of the protrusion 120 has an intersecting first side 122 and a second side 123, and the included angle between the first side 122 and the second side 123 is 90°.

[0041] The limiting part 31 is located at the top of the valve stem 2. After installation, the limiting part 31 is located within the annular limiting section 121. (See also...) Figure 6 As can be seen from the figure, the limiting part 31 in this embodiment is roughly elliptical. The limiting part 31 has two opposite arc edges 311 and two opposite straight edges 312. The two ends of each straight edge 312 are respectively connected to one end of the arc edge 311. In this embodiment, the arc edge 311 fits against the inner wall of the annular limiting section 121, and the straight edge 312 can abut against the two protrusions 120. During the rotation, it fits against the first side 122 or the second side 123 of the two protrusions 120, thereby realizing the 90° limiting during the rotation of the ball valve.

[0042] The limiting part 31 has a rotating groove 310 in the middle. In this embodiment, the rotating groove is in the shape of an "I". Of course, its shape can be designed into other shapes according to actual needs. The lower end of the magnetic key 4 is provided with a plug part 41. When in use, the plug part 41 can be inserted into the rotating groove 310 to realize the torque transmission between the magnetic key 4 and the valve stem 2.

[0043] Simultaneously refer to Figure 3 , Figure 4 and Figure 6 The locking assembly includes an elastic element 51, a magnetic pin 52, a magnetic pin hole 53, and a locking hole 54. Two magnetic pin holes 52 are provided on the side of the valve stem 2, and the two magnetic pin holes 52 are coaxially arranged back-to-back. Two locking holes 54 are provided on the side of the protruding neck 12, each adapted to one of the magnetic pin holes 52. The inner diameter of the locking hole 54 is typically slightly larger than the outer diameter of the magnetic pin 52. Furthermore, to facilitate the machining of the locking hole 54, in this embodiment, the locking hole 54 is a through hole. The locking ball valve also includes a protective sleeve 6, which is fixedly fitted onto the protruding neck 12 with an interference fit, covering the locking holes 54. The protective sleeve 6 prevents the magnetic pin 52 and the elastic element 51 from dislodging.

[0044] After assembly, the elastic element 51 (in this embodiment, it is a spring) and the magnetic pin 52 are sequentially installed in the corresponding magnetic pin holes 52.

[0045] Continue to refer to Figure 2 The magnetic key 4 includes a plug part 41 and a magnetic sleeve 42. The magnetic sleeve 42 is fitted onto the plug part 41. The shape of the plug part 41 is adapted to the rotating groove 310. An unlocking magnet 420 for cooperating with the magnetic pin 52 is fixed on the side of the magnetic sleeve 42.

[0046] The working process of this utility model is as follows:

[0047] When locked, the magnetic pin 52 falls into the magnetic pin hole 53 and the locking hole 54 simultaneously under the action of the elastic element 51. At this time, the valve stem 2 cannot rotate, and the locking ball valve cannot be opened / closed.

[0048] When unlocking, the magnetic key 4 is fitted onto the protruding neck 12. The unlocking magnet 420 on the magnetic key 4 cooperates with the magnetic pin 52 on the valve stem 2, so that the magnetic pin 52 compresses the elastic element 51 and is always located in the magnetic pin hole 53; at this time, the locking ball valve can be opened / closed at will.

[0049] Example 2

[0050] Reference Figure 7 This embodiment is basically the same as the structure of the first embodiment above. The main difference is that the magnetic pin hole 53′ and the locking hole in this embodiment are opened in the opposite positions to those in the first embodiment. In this embodiment, the magnetic pin hole 53′ is opened on the side of the protruding neck 12, and the locking hole (not shown in the figure due to the perspective) is opened on the side of the valve stem 2.

[0051] This technical solution, as an alternative, can also achieve the effects of rotational limiting and magnetic locking.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lock-up ball valve comprising a valve body and a valve stem, the valve body comprising a main pipe portion and a boss, the boss being fixed to the main pipe portion, the valve stem being provided through the boss, characterized in that, Also included are: A limiting assembly, including a limiting part arranged on the valve stem and an annular limiting segment arranged on the convex neck, the annular limiting segment being provided with a protrusion, the limiting part being rotatable within the annular limiting segment and being rotationally limited by the protrusion; At least one set of locking assemblies, the locking assembly including an elastic member, a magnetic pin, a magnetic pin hole and a locking hole, the magnetic pin hole being arranged on the side of the valve stem or the convex neck, and the locking hole being arranged on the opposite side of the magnetic pin hole, the elastic member being arranged in the magnetic pin hole, in the unlocked state, the magnetic pin being located in the magnetic pin hole; in the locked state, the magnetic pin is located between the magnetic pin hole and the locking hole.

2. The locked ball valve of claim 1, wherein: The magnetic pin hole is arranged on the side of the valve stem, and the locking hole is arranged on the side of the convex neck.

3. The locked ball valve of claim 2, wherein: The annular limiting segment is centrally symmetrically provided with two protrusions, and the limiting part is rotationally limited between the two protrusions.

4. Locking ball valve according to claim 2 or 3, characterized in that: The limiting part is located at the top of the valve stem.

5. The locked ball valve of claim 4, wherein: A rotating groove is arranged in the middle of the limiting part.

6. A lock-up ball valve according to claim 2 or 3, characterized in that: The annular limiting segment is located at the top of the convex neck.

7. A lock-up ball valve according to claim 2 or 3, characterized in that: The radial cross section of the protrusion has intersecting first and second edges, and the included angle between the first and second edges is 90°.

8. The locked ball valve according to claim 2 or 3, characterized in that: The locking hole is a through hole, and the locking ball valve further includes a protective sleeve fixedly arranged outside the convex neck and covering the locking hole.

9. The locked ball valve of claim 8, wherein: The protective sleeve is fixedly arranged outside the convex neck by interference fit; or the protective sleeve is adhered to the outside of the convex neck.

10. A locked ball valve according to claim 2 or 3, characterized in that: Two sets of locking assemblies are included, two magnetic pin holes are arranged on the valve stem, and the two magnetic pin holes are coaxially arranged.

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