DK171904B1

DK171904B1 - Valve

Info

Publication number: DK171904B1
Application number: DK122189A
Authority: DK
Inventors: Daniel Dutheil
Original assignee: Presto Robinets Sa
Priority date: 1988-03-18
Filing date: 1989-03-14
Publication date: 1997-08-04
Also published as: DE68900052D1; DK122189D0; JPH01269765A; ES2022752B3; PT89925B; EP0333526B1; ATE62332T1; EP0333526A1; SG66991G; PT89925A; KR890014934A; JP2633347B2; FR2628817B1; DK122189A; KR940005984B1; FR2628817A1; HK102691A; GR3002010T3

Abstract

Slow-closing valve in which the delay chamber communicates with the water inlet through a calibrated orifice (6) in which a metal rod (7) is able to move, characterised in that the calibrated hole is made in a small tablet (10), made of a hard material, and attached to the part that usually comprises the calibrated orifice. <IMAGE>

Description

DK 171904 B1DK 171904 B1

Opfindelsen angår en ventil med forsinket lukning.The invention relates to a valve with a delayed closure.

Man kender ventiler, hvis ventilklap bæres af et stempel, som er i stand til at forskydes i et kammar, som står i forbindelse med vandtilledningen, ved hjælp af en kalibreret åbning, som 5 angivet i krav 1's indledning i FR-A-2391406.Valves are known whose valve flap is carried by a piston which is capable of being displaced in a chamber communicating with the water supply by means of a calibrated aperture as defined in the preamble of claim 1 in FR-A-2391406.

Under åbningen af ventilen forskyder man stemplet i kammeret, idet man uddriver det vandrumfang, som det indeholder, hvilket medfører en løftning af ventilklappen. Straks ved løftningen af ventilklappen trænger vandet ind i forsinkelseskammeret gennem den nævnte 10 kalibrerede åbning, og vandet forskubber gradvis ventilklappen mod dens sæde.During the opening of the valve, the piston is displaced in the chamber, expelling the volume of water it contains, which causes a lifting of the valve flap. Immediately upon lifting the valve flap, the water enters the delay chamber through said calibrated opening and the water gradually shifts the valve flap toward its seat.

Det vil umiddelbart forstås, at forsinkelsesperioden i hovedsagen afhænger af diameteren af den kalibrerde åbning.It will be understood immediately that the delay period depends essentially on the diameter of the calibrated aperture.

15 Til undgåelse af tilstopning af den kalibrerede åbning med vilkårlige aflejringer forløber der gennem denne åbning en spindel, som kan forskydes aksialt i forhold til åbningen.15 In order to avoid clogging of the calibrated orifice with arbitrary deposits, a spindle which can be axially displaced relative to the orifice proceeds through this orifice.

Indretningen af eksisterende ventiler består i, at ved hver manøvre af disse ventiler udfører den nævnte spindel en frem- og tilbagegående bevægelse gennem den kalibrerede åbning, og 20 gnidningen, som opstår, medfører et slid, der viser sig som en forøgelse af diameteren af åbningen. Følgelig trænger vandet lettere ind i forsinkelseskammeret, og ventilklappen forskydes mod sit sæde på et tidligere tidspunkt end ønsket.The arrangement of existing valves consists in that in each maneuver of these valves, said spindle performs a reciprocating movement through the calibrated aperture, and the rubbing which occurs causes a wear which appears as an increase in the diameter of the aperture. . Consequently, the water penetrates more easily into the delay chamber and the valve flap is displaced toward its seat at an earlier time than desired.

Dette fænomen forstærkes yderligere af den omstændighed, at spindelen normalt er af metal, 25 medens det kalibrerede hul er udført i et stykke plasticmateriale.This phenomenon is further compounded by the fact that the spindle is usually of metal, while the calibrated hole is made of a piece of plastic material.

Den foreliggende opfindelse, som afhjælper disse ulemper, er ejendommelig ved det i krav 1 og i krav 2 anførte.The present invention which addresses these drawbacks is characterized by that of claim 1 and claim 2.

30 Opfindelsen skal i det følgende forklares nærmere i forbindelse med tegningen, hvor fig. 1 er et snit i et normalt ventilhoved i en ventil med indretningen ifølge opfindelsen (ventilhuset er ikke vist), og fig. 2 i større målestok enkeltheden A i fig. 1.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail in connection with the drawing, in which 1 is a sectional view of a normal valve head of a valve of the device according to the invention (the valve housing is not shown); and FIG. 2 on a larger scale the simplicity A of FIG. First

35 På tegningen vil det ses, at ventilhovedet omfatter en ventilklap 1, som bæres af et stempel 2, som kan forskydes i et forsinkelseskammer 3.35 In the drawing, it will be seen that the valve head comprises a valve flap 1 carried by a piston 2 which can be displaced in a delay chamber 3.

DK 171904 B1 2DK 171904 B1 2

Vandet trænger ind i ventilhovedet gennem åbninger 4 og strømmer bort gennem åbninger 5 eller omvendt.The water enters the valve head through openings 4 and flows through openings 5 or vice versa.

Stemplet 2 omfatter en kalibreret åbning 6, som tillader forbindelse mellem vandets indløb og 5 forsinkelseskammeret 3, og hvori en spindel 7 kan forskydes.The piston 2 comprises a calibrated aperture 6 which allows connection between the water inlet and the delay chamber 3 and in which a spindle 7 can be displaced.

På kendt måde udgør spindelen 7 den aksiale forlængelse af enden af en skruefjeder 8, hvis anden ende er fastgjort til stemplet.In known manner, the spindle 7 constitutes the axial extension of the end of a coil spring 8, the other end of which is attached to the piston.

10 Idet man trykker på ventilens trykknap 9, forskydes stemplet i forsinkelseskammeret 3, idet vandet da fortrænges af periferien af stemplet, og den frie ende af fjederen 8 trykker mod bunden 3a af forsinkelseskammeret 3, og spindelen 7 forskydes i åbningen 6.Pressing the valve pushbutton 9, the plunger is displaced in the delay chamber 3, the water then being displaced by the periphery of the plunger and the free end of the spring 8 pressing against the bottom 3a of the delay chamber 3 and the spindle 7 being displaced in the opening 6.

Når stemplet forskydes i omvendt retning, drevet af trykket af vandet, som trænger ind i kam-15 meret gennem åbningen 6, afspændes fjederen, og spindelen 7 forskydes i modsat retning i forhold til stemplet.As the piston is displaced in the reverse direction, driven by the pressure of the water which enters the chamber through the opening 6, the spring is relaxed and the spindle 7 is displaced in the opposite direction to the piston.

Ifølge opfindelsen er den kalibrerede åbning forsynet med en lille brik 10 af et hårdt materiale, som fastholdes i stemplet 2.According to the invention, the calibrated opening is provided with a small piece 10 of a hard material which is retained in the piston 2.

2020

Fortrinsvis udføres brikken 10 af syntetisk rubin.Preferably, the piece 10 is made of synthetic ruby.

Der findes en lejring 11 i stemplet 2, hvori brikken 10 fikseres.There is a bearing 11 in the piston 2 in which the chip 10 is fixed.

25 Da stemplet 2 normalt er af plasticmateriale, er dette stempels elasticitet tilstrækkelig til at fastholde den nævnte brik og at sikre tæthed. Til forbedring af fastholdelsen af brikken kan lejringen 11 imidlertid ved sin periferi have en lille fikseringspakning 12.Since the piston 2 is usually made of plastic material, the elasticity of this piston is sufficient to retain said piece and to ensure tightness. However, to improve the holding of the chip, the bearing 11 may have a small fixing gasket 12 at its periphery.

Til bedre forståelse af opfindelsen skal det fremhæves, at diameteren af brikken 10 er af stør-30 relsesordenen 1,5 mm, og at dens tykkelse ikke overstiger 0,5 mm, medens diameteren af åbningen 6 ligeledes er 0,5 mm.For a better understanding of the invention, it should be emphasized that the diameter of the chip 10 is of the order of 1.5 mm and that its thickness does not exceed 0.5 mm, while the diameter of the opening 6 is also 0.5 mm.

Claims

A valve with a delayed closure of the type in which the valve flap is carried by a piston (2) which can be displaced tightly in a delay chamber (3) which communicates with the inlet of the water 5, which is fed through a calibrated opening in the piston, the chamber being disposed on the piston side opposite the valve valve seat, and there being a metallic spindle (7) which can be displaced axially through this calibrated opening, characterized in that the calibrated opening is made of a small piece (10) of hard material , which is placed in the piston. 10

Valve according to claim 1, characterized in that the piston with the calibrated opening has a bearing in which the chip is secured. 15