CN2254135Y

CN2254135Y - Micro-moment water supply valve

Info

Publication number: CN2254135Y
Application number: CN 95226315
Authority: CN
Inventors: 吴植仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-22
Filing date: 1995-11-22
Publication date: 1997-05-14
Anticipated expiration: 2005-11-22

Abstract

The utility model relates to a micro-moment water supply valve which can automatically control the water level in a water tank, which is composed of a valve seat, a valve cover, a valve core rod, a floating piece, a floating piece rod, a sealing piece and a connecting piece. The utility model is characterized in that a lever which can close the valve core rod is not flat and straight, wherein, one side of the lever is provided with a cam or forms a curve shape, so that the valve core rod can also be ensured to travel for an enough distance when a force arm is shortened close to zero. The utility model has the advantages of simple structure, low material consumption, low noise, reliable performance, high sensitivity, no special requirement for water quality, and short closing force moment. A small floating piece and a short floating piece rod can be used by the utility model.

Description

A kind of micro-torque water supply valve

The utility model belongs to cleaners and polishes

In the water tank of various w.c.pans, all need to dispose a kind of water supply valve that can control the water surface in the refrigerator automatically.Use maximum first-elected float valves at present.This float valve has a series of shortcomings: the ball float volume is big, (D ≈ 100M/M) ball lever long (L ≈ 200M/M), and moment is big, and ball lever is yielding, causes water surface Control Failure.Be not suitable for matching with the cistern for toilet water-saving cistern (94215444.4) of claimant's invention.

For overcoming the above-mentioned shortcoming of float valve, the scientific worker has developed diversified water supply valve both at home and abroad.That have and applied for patent (92200667.9,92213644.0,93204488.3).It is reported that business-like at present novel water supply valve has two classes: a class is to use small floating ball, its working principle is to come the bigger water supply valve mouth of switch diameter with the control water surface by the relief port of the special thin pressurizing chamber of switch diameter.One class is without ball float, and its working principle is that the static pressure that utilizes the water surface amplifies through film and comes switch water supply valve mouth with the control water surface.This two classes water supply valve all exists following shortcoming: complex structure, number of spare parts is many, particularly the clean water quality degree is required sternly suspended matter to be arranged, otherwise very easily malfunctioning.

The purpose of this utility model aims to provide a kind of novel water supply valve.It has simple in structure, materials consumption is low, noise is little, reliable performance, water quality is not had specific (special) requirements, closes advantages such as moment is little, sensitivity height.

The utility model is achieved in that to be made the lever of cut-off valve plug non-straight, is provided with cam or is curved shape at an end that presses down the spool rod, shortens when going to zero to reach at the arm of force that makes this side, can also guarantee that the spool rod has enough strokes.

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is common float valve fundamental diagram.D is the water supply valve mouth, and C is the spool rod.Under the ball float floating function, spool rod C compresses water supply valve mouth D, can close into water.Because following three aspects make the moment of closing bigger.

(1) to guarantee that water supply valve has certain water intake velocity, so water supply valve mouth D diameter can not too little (being generally the 5-6 millimeter);

(2) pressure of supply water of tap water pipe network necessarily (is generally the 3-5 kilograms per centimeter ²);

(3) adopting under the condition of straight shape lever, certain stroke is being arranged, so arm of force OA can not too little (being generally 10 millimeter) for guaranteeing the spool rod.

For obtaining to be enough to close the big moment of water supply valve mouth, have to adopt bigger ball float (diameter reaches 100 millimeters) and long ball lever (length reaches more than 200 millimeters).Cause in above-mentioned three reasons of this situation, demand and objective condition that preceding two reasons are products limit, and we can't make them reduce.But the 3rd reason can weaken.Of the present utility model being characterised in that made lever non-straight, makes lever one side be provided with cam E (or being crooked shape) and can also guarantee that the spool rod has enough strokes to reach when the arm of force being shortened become to doing zero.

Fig. 2 is a fundamental diagram of the present utility model.OA is that the arm of force (projection that bar the is long) OB of spool side is the arm of force (projection that bar is long) of ball float side among the figure.As seen from the figure; Owing to adopted cam (or crooked shape) structure, OA is foreshortened to as far as possible go to zero to be the limit, the moment of close port D is reduced significantly, and do not influence the stroke of spool C simultaneously.For adopting little floating part (ball float or keg float), the floating part bar of shortening that possibility is provided.

Embodiment

Fig. 3 is the dwarf forms valve, and Fig. 4 is high type valve.Legend is as follows:

1, floating part (ball float or keg float) 2, floating part bar 3, cam 4, spool rod

5, valve gap 6, valve gasket 7, valve seat 8, sewer 9, water-adding pipe

10, backstop 11, bowl-type rubber cushion 12, filling pipe end 13, rubber cushion

14, flat gasket 15, root mother 16, locknut 17, cushion rubber 18, rubber cushion

19, retainer

Be dipped in below the water surface during work of dwarf forms valve, materials are economized, noise is low is its advantage.But must be provided with backstop.To prevent inverted-siphon.The water surface in the high outflow box of the valve seat of high type valve, no inverted siphon phenomenon, but materials are more, and noise is also big than dwarf forms valve.The buoyancy aid of high type valve is an energy oscilaltion keg float freely as shown in Figure 4, and its purpose is a conserve space, also can use ball float when implementing certainly.

The whole proportion of buoyancy aid is less than water, and available hollow structure also can use foamed material to make.Can be that spherical (ball float) also can be other shape (floating block keg float etc.) on the profile.

Claims

1, a kind of micro-torque water supply valve that can control the water surface in the water tank automatically, formed by valve seat, valve gap, spool rod, floating part, floating part bar, Sealing and link, the lever that it is characterized in that the cut-off valve plug is a non-straight, the one side is provided with cam or is curved shape, when arm of force shortening is gone to zero, can also guarantee that the spool rod has enough strokes.