Ball valve device and method for forming a ball retainer in a check valve
a ball valve and check valve technology, applied in the direction of check valves, functional valve types, safety valves, etc., to achieve the effect of reducing costs
Inactive Publication Date: 2011-12-01
DEBEM
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The invention provides a method for making a ball retainer in a valve device. This involves creating a protrusion on the inner surface of the valve's cylindrical wall to stop a ball-shaped valving member. The method involves shaping the protrusion by deforming the cylindrical wall at a specific area. The resulting protrusion has a spherical surface that merges with the inner surface of the cylindrical wall. The invention also provides a ball valve device with the protrusions and a pumping unit with the valves. The technical effect is to improve the valve's ability to retain the ball and prevent it from moving in multiple directions.
Problems solved by technology
In a plurality of technical fields in which use of check valves is made, a problem exists to prevent residues of fluid material from remaining on internal surfaces of the valve and deposition at dead points, or under-cuts that could be cause of contamination.
In this regards, the roughness of the internal surface of the valve body, may also imply sometime a problem; furthermore, since the closure ball member of the valve device must be retained at the outlet side for the fluid, by providing proper retaining elements, for example internal protrusions by casting or machining the interior of the valve body, as disclosed for example in JP 58124873, GB 2287085 and DE 102005012298, some standards currently in force establish that the internal surface of a valve body should be conformed to prevent deposition of residues of the flowing fluid inside the same valve device.
Method used
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[0025]With reference to the FIGS. 1 to 3, the general features will be now described with reference to a tubular body suitable for a check valve device of ball type according to the invention, and a related method for forming a ball lock comprising one or more angularly spaced apart cup-shaped spherical protrusions, or ball retaining members, inside the tubular body of the valve device.
[0026]In FIG. 1, a tubular metal element has been indicated by the reference number 10, suitable for providing the tubular body of a ball valve device. The tubular body 10 comprises a cylindrical wall 11 having an inner surface extending along a longitudinal axis between inlet and outlet sides, wherein the wall 11 comprises one or more angularly spaced apart deformable areas 13 along an annular strip, at which areas 13 cup-shaped spherical internal protrusions 13A are made by a simple deformation caused by radially and inwardly pressing and crimping said deformable areas of the cylindrical wall 11; th...
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Abstract
The ball valve device comprises a tubular body in metal material, having a cylindrical wall conformed with spherical cup-shaped internal protrusions to retain a ball shaped valving member, preventing the same valving member from being entrained by a fluid flowing through the valve device. The internal spherical protrusions are formed by radially pressing and crimping the cylindrical wall of the tubular body at one or more angularly spaced apart deformable areas of an annular strip. The tubular body provided with the ball retaining protrusions is suitable for any valve device, such as ball check valves, pumping units, and / or ducts.
Description
BACKGROUND OF THE INVENTION[0001]The present invention refers to a ball valve device and a method for making internal ball lock into a metal tubular body of the valve device, to stop a ball shaped valving member movable in an axial direction of a valve device, for example in check valves, or valve devices of any type, suitable for being arranged in ducts, pumping units, in order to retain the movable ball member from being entrained by a flowing fluid in an open condition of the valve device; the invention refers also to a check valve device of ball type comprising a tubular body provided with shaped internal protrusions to axially retain a movable ball member, and its use in pumping units and in fluid circulation ducts.STATE OF THE ART[0002]In a plurality of applications, for example in food, chemical and / or naval fields, use is made of check valves of ball type, enabling a fluid to flow in a prefixed direction, preventing the same fluid from flowing backwards in a direction opposi...
Claims
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IPC IPC(8): F04B43/02F16K15/00B21K1/24
CPCY10T29/49409B21K1/24Y10T137/7904
Inventor DE BERNARDI, MARCOVAGLIVIELLO, PIETRO
Owner DEBEM