FR2716705A1 - Valve for controlling the circulation of a fluid in a conduit. - Google Patents

Abstract

The valve (12) comprises: a body (14), which defines therein a chamber (20) and in which is provided a valve seat (22), and in which respective openings (24, 26) are formed for the entry and exit of the fluid inside and outside the chamber (20); a shutter (30) held with play within said chamber (20) and capable of being entrained by the fluid flowing through the chamber (20), against said valve seat (22), causing the interruption of the flow of fluid through the valve (12), and a member (46) movable between an outgoing position, in which it projects inside said chamber (20), preventing said shutter (30) from being driven by the fluid against said valve seat (22), and a retracted position, in which it does not interfere with said shutter (30).

Description

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  VALVE FOR CONTROLLING THE FLOW OF A FLUID IN A

CONDUIT

  The present invention relates to a valve (or a valve) for controlling the circulation of a fluid, for use, in particular, in the hydraulic circuits of a dishwashing machine, for example as a component of the device. anti-overflow or to control the water supply to one of the two

Wash blades.

  The valve of the invention is characterized in that it comprises: - a body which defines a chamber inside and in which a valve seat is provided, and where respective openings are made for the inlet and the outlet of the fluid inside and outside the chamber, - a shutter maintained with play inside said chamber and capable of being entrained by the fluid which circulates through the chamber, against said valve seat, causing the interruption of the flow of fluid through the valve, and - a movable member between an outgoing position, in which it sails inside said chamber, preventing said shutter from being driven by the fluid against said valve seat, and a position reentry, in which the iL does not interfere with said shutter. The valve of the invention has the advantage of having a very simple structure and an operating arrangement determined immediately by the position of the movable member. In fact, when the latter protrudes into said chamber, and interferes with the shutter, the valve allows the passage of the fluid, while when the movable member is recessed, the pressure exerted by the fluid can, without obstacle, crush the shutter against its seat, interrupting the

passage of the fluid.

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  Other characteristics and advantages of the present invention will appear obvious on reading

  of the detailed description which follows, given purely

  non-limiting example, made with reference to the accompanying drawings, in which: the single figure is a sectional view of the valve

of the invention.

  In a conduit 10 which extends vertically is mounted a valve 12 comprising a body 14, which supports, at its respective ends, sleeves 16,

  18, and defines a chamber 20 inside.

  In the body 14 is provided a valve seat 22, and respective openings 24, 26 are made for the entry into the chamber 20 and the exit outside said chamber of the fluid which circulates in the conduit 10,

  according to the direction indicated by arrow 28.

  Inside the chamber 20 is maintained, with clearance, a shutter 30, shaped in the shape of a sphere and capable of being entrained by the fluid which passes through the

  chamber 20 against the valve seat 22.

  An elongated carcass 32 is assembled to the body 14, with the interposition of a lining 34, and with one of its end portions 36, it closes a lateral opening 38 of the body 14, constituting a part of the wall of the chamber 20. The angle formed by the longitudinal axis of the carcass 32 with that of the duct 10,

  in the example shown, is about 60 degrees.

  The end of the carcass 32 opposite the body supports a solenoid 40 capable of generating a magnetic field in a cavity 42 inside the carcass 32, in which it is mounted, so as to be able to slide, a magnetic core 44 secured to 'a

  end of a movable member shaped as a rod 46.

  By the effect of the excitation of the solenoid 40 and the action of a spring not visible in the figure, the distal end 48 of the rod 46, which is opposite to the solid end of the core 44, is thus mobile between

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  an outgoing position, in which it protrudes through the end portion 36 of the carcass 32, at

  inside the chamber 20, and a retracted position.

  During the operation of the valve 12, if the movable member 46 is in the retracted position, where it does not interfere with the shutter 30, the fluid which tends to flow through the chamber 20 compresses the shutter against seat 22, causing the flow to be interrupted

through valve 12.

  On the contrary, if the movable member 46 is in the extended position illustrated in the figure, it interferes with the shutter 30, preventing it from being driven against its seat 22 and allowing circulation

fluid through valve 12.

  It is naturally understood that the principle of the invention remaining the same, the details of implementation and the forms of application may be modified considerably compared to what has been described and illustrated in the drawings, without however departing from the

field of the present invention.

  Thus, for example, instead of a solenoid control device, it would be possible to use a bimetallic or wax control device, or any

other device.

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Claims (4)

  1. Valve (12) for controlling the circulation of a fluid in a conduit (10), characterized in that it comprises: - a body (14) which defines inside a chamber (20) and in which is provided with a valve seat (22) and where respective openings (24, 26) are made for the inlet and outlet of the fluid inside and outside the chamber (20), - a shutter (30 ) held with play inside said chamber (20) and capable of being entrained by the fluid which circulates through the chamber (20), against said valve seat (22), causing the flow of fluid through the valve (12), and - a member (46) movable between an outgoing position, in which it projects inside said chamber (20), preventing said shutter (30) from being driven by the fluid against said valve seat (22), and a retracted position, in which it   does not interfere with said shutter (30).   2. Valve (12) according to claim 1, characterized in that said movable member is profiled in the form of a rod (46) having a distal end (48) capable of penetrating inside said chamber (20), and the opposite end being connected to a magnetic core (44), which can be subjected to the action   of a magnetic field generated by a solenoid (40).   3. Valve (12) according to claim 2, characterized in that said rod (46) is movable inside an internal cavity (42) of a carcass (32), which acts as a support for the solenoid (40), and that it closes, by means of one of its end portions (36), the rod (46) of which protrudes, another opening (38) provided in the body (14), constituting a   part of the wall of the chamber (20). - 5 - 2716705   4. Valve (12) according to any one of   previous claims, characterized in that   said shutter (30) is shaped like a sphere.