CN2556437Y

CN2556437Y - Float valve

Info

Publication number: CN2556437Y
Application number: CN 02241527
Authority: CN
Inventors: 陈冶
Original assignee: Foster Assets Corp Hong Kong
Current assignee: Foster Assets Corp Hong Kong
Priority date: 2002-07-16
Filing date: 2002-07-16
Publication date: 2003-06-18
Anticipated expiration: 2012-07-16

Abstract

The utility model provides a floating valve and comprises a shell (4, 6) between a fluid inlet (10) and a fluid outlet (18) limiting a fluid outlet channel, a valve block (16) limited in the channel, a valve component (24) abut with the valve block (16) in a movable way to block fluid channel as well as a sliding component (40) which can push forward a control device of the valve component and can be push forward horizontally. When in filling, the utility model is suitable for rapid switching between a first stable position and a second stable position, the valve component is held by the sliding component (40) at a fully open position when arranged at the first stable position, and the valve component (24) is held at a closed position when arranged at the second stable position.

Description

Float valve

Technical field

The utility model relates to a kind of float valve, and relates in particular to a kind of float valve that is used to control the liquid storage tank topping up.

Background technique

This float valve has a wide range of applications, from water tank used in everyday, gas tank and fuel tank to commerce or the various containers that use of industrial mechanism.

In the form of many known valves, valve body has the hollow cavity that limits the fluid passage.Enclosure interior also is limited with the valve seat with removable valve member, and this valve member is provided for promoting valve seat with the block fluid flow mistake.Float is mechanically connected to removable valve member, with promote according to fluid level in the container valve member towards or deviate from valve seat.The valve arrangement of even now is enough to demand competent at a job usually, but it has also such defective, and promptly when case can container when removable valve member is near valve seat near full state, the fluid flow of the valve of flowing through reduces, and this can cause the increase of topping up time.

The model utility content

In order to overcome these defectives, the utility model provides a kind of float valve, be included in the shell that limits the fluid passage between fluid inlet and the fluid output, and be limited to valve seat in the described passage, movably against the valve member of described valve seat to stop that fluid passes through, and valve member control gear, it is suitable for switching fast between first settling position and second settling position when filling, remain in the fully open position at the described first settling position valve member, remain in operating position at the described second settling position valve member.

A kind of like this device means when topping up, from use up or use up basically state begin until reach be full of till valve remain on the fully open position always, valve switches to its complete operating position when being full of, therefore during topping up valve to allow fluid flow be maximum always, thereby reduced the topping up time.

Float valve is specially adapted at home or the small portable container of the splendid attire liquid gas of outdoor culinary art stove and accessory (for example barbecue).This valve is installed in the neck of gas tank, connects an independent close/open valve in " downstream " of float valve side, and close/open valve allows the user to open gas tank and emits gas.Such container is equipped with liquefied propane usually, and can use combustion gas always and use up or use up basically, it is sent back again to be full of then.But the utility model is not limited to this application, and it has wide applications more.

In a preferred embodiment, valve member has head and valve rod, and described head leans against on the valve seat and to move, and valve rod extends from head, and control gear acts on the valve rod, and first elastic device makes valve member be offset towards operating position.Control gear is preferably used for acting on valve rod, valve member is remained on the fully open position always float to predetermined fluid level until float.

More specifically, on valve rod, form and have the part of relatively large cross section, this part is connected with the trailing part of the cross section with relative reduction, be formed with shoulder in the joint, wherein control gear comprises transversely movable sliding element, and sliding element is under described first settling position is bonded on shoulder.

Float is used to be pressed in described sliding element, the situation that causes the liquid level rising according to the fluid topping up, horizontal the moving of described sliding element is pressed on described second elastic device, to discharge the valve rod shoulder, and thus valve member is discharged from open position, described first elastic device forces it to arrive operating position fast.Can do suitable change to the form of the actuation surfaces on the float arm, described actuation surfaces comprises first actuation surfaces that engages sliding element and second actuation surfaces that engages valve rod.

The sliding element of control gear can be arranged in the independent attaching enclosure that joins with main body cover, and valve rod extends into wherein.This has guaranteed that hydrodynamic pressure never directly affacts on the control gear, the wearing and tearing that it is of value to proper functioning and reduces element.

Description of drawings

In conjunction with the accompanying drawings embodiment of the present utility model is described below by example, wherein:

Fig. 1 is the exploded view according to the utility model embodiment's float valve element;

Fig. 2 is the side view that is in the float valve of open mode, and wherein valve body is longitudinally cut open;

Fig. 3 is 90 ° longitdinal cross-section diagram with Fig. 2, and has omitted float;

Fig. 4 is the side view that is in the float valve of closed state, and wherein valve body is longitudinally cut open; And

Fig. 5 is 90 ° longitdinal cross-section diagram with Fig. 4, and has omitted float.

Embodiment

Fig. 1 at first, float valve generally is expressed as 2.In an application, float valve 2 is used to be installed in the neck of gas cylinder (its combustion gas is generally propane gas), and this class gas cylinder is in daily life as the air supply source of outdoor culinary art with stove and accessory.Also be connected to close/open valve on it.When the combustion gas of gas cylinder is used up, pour into petrogas by float valve 2.Float valve 2 comprises main body cover, and main body cover has upper shell 4 and lower shell body 6 respectively.Upper shell 4 has last threaded exterior 8, is used to be connected to the fluid feed line, and limits axis hole 10.The bottom is provided with outside thread 12.

Lower shell body 6 is an elongated shape, and it limits the cylindricality inner duct, and this duct comprises the frusto-conical surface that forms valve seat 16, and valve seat 16 communicates with a series of radial port 18, preferably with reference to shown in Fig. 3.The upper rim inboard is provided with internal thread 20, can upper and lower casing closely be connected together by screw-thread fit by this.Lower area at lower shell body 6 is provided with axis hole, and the valve rod of removable valve member 24 extends through axis hole.Valve member 24 has last disc head 26.Valve rod has the bigger intermediate portion of diameter 22, ends in the pin shape part 27 of minor diameter, forms shoulder 29 between them.

In the cylindricality inner region of lower shell body 6, be provided with inverted cup-shaped intercalation seat 28.Be provided with many ribs 30 in its appearance, be used for intercalation seat 28 and case member 6 medial septal are left, between them, limit the flow path of fluid.Intercalation seat 28 inside hold the head 26 and the helical spring 32 of valve member 24, promote valve member 24 thus downwards.

What be connected with lower shell body 6 lower ends is end piece 34, is connected to frame 6 by pair of screws 36.End piece 34 preferably is made of molded body, and is formed with the pedestal 38 of horizontal expansion, is provided with sliding element 40 in pedestal 38, and it is as the control unit of valve member.Between sliding element 40 first end faces and seat 38 internal edges small coil springs 42 is set, sliding element 40 is offset left thus, shown in Fig. 1,2 and 4.Be provided with open area 43 on the opposite of pedestal 38, so the actuation ends of sliding element 40 can reach outside.Offering axially (say on regard to whole valve meaning axially) perforate 45 on the sliding element 40, therefore the valve rod of removable valve member 24 lower end surface that can pass and stretch out end piece 34 from it.

A pair of finger shape plate 44 is extended downwards by end piece 34, and it pivotally is fixed with float arm 46 and float 48 by axostylus axostyle 50 and locking ring 52.Float arm 46 has first actuator surface 54 that acts on pin 27 ends, and acts on sliding element 40 and can reach second actuator surface that outside face works.

Discuss the operation of valve 2 now.Fig. 2 and 3 illustrates the position that valve is fully opened, and this moment, valve was arranged in container, and the fluid level in the container drops to and is lower than the float level line thereby need fills again.With in the application of gas cylinder, gas cylinder uses always usually that combustion gas is used up or near using up in culinary art.Float 48 is in its lowest positions, so actuator surface 54 acts on the pin end 27, promotes upwards pressure spring 32 of valve member 24.Float angle with respect to the horizontal plane is about 30 °.Force the head 26 of valve member 24 upwards to enter in the intercalation seat 28, between head 26 peripheries and valve seat 16, have the gap thus.Fluid can flow into thus, under pressure or action of gravity, by valve 2, is flowed out by mouth 18, shown in arrow in Fig. 2 and 3.Because valve member 24 is in this position that makes progress, sliding element 40 is promoted and can move to its leftmost position (just saying on Fig. 2 meaning) by spring 42, extends through open area 43 in this sliding element end, position.In this position, shoulder 29 leans against near the perforate 45 the sliding element upper surface.

When the casing topping up, float 48 slowly upwards rotates around pivot.But sliding element 40 still makes valve member 24 keep opening fully.First actuator surface leaves the end face of pin 27, and second actuator surface 56 begins to contact the sliding element end after rotating about 20 °.Float continues to move up and makes sliding element 40 move right (just saying on Fig. 2 meaning) gradually until such location point, this location point is corresponding to float angle about 2 ° under the horizontal plane, the edge that shoulder 29 can off center slip perforate 45 and under spring 32 effects, enter this center drilling 45 downwards fast thus, enter the operating position shown in Fig. 4 and 5, at the periphery of the disk 26 of this point valve member 24 near valve seat 16, fluid transfer.

Along with fluid level reduces once more, float 48 will rotate around pivot, thus second actuator surface 56 from sliding element 40 break away from and first actuator surface 54 once more with the end joined of pin 27 and promote it and move upward and open valve seat.After the short distance that moves up, the shoulder 29 of valve member 24 leaves central slide perforate 45, so sliding element 40 ejects (Fig. 2) left, so maintaining valve 2 is in full open position.By to the suitable selection of axial overlap degree between middle valve stem part 22 and the central slide perforate 45, can the moving range of control valve member 24 before reaching full open position.When using in gas cylinder, the opening speed of valve is unimportant, and the user uses gas cylinder to use up or approaching using up until combustion gas usually, just fills out filling then.But can make this shift motion reduce to minimum, and still can assurance device reliable and stable.

Under the free position of valve, no matter to open or closure, the internal pressure in the container tank can both force valve member 24 to be lifted off a seat.Therefore, when the close/open valve that is connected valve 2 back was opened, air-flow came out from gas tank under pressure.

Therefore, valve 2 plays the bistable valve effect in fact, and it has full open position and complete closed state, and switches between full open position and complete closed state.Valve between removal period 2 also can be between operating position and fully open position fast moving.

Claims

1. a float valve is characterized in that, comprising:

Between fluid inlet and fluid output, limit the shell of fluid passage;

Be limited to the valve seat in the described passage;

Be resisted against movably on the described valve seat to stop the valve member of fluid passage; And

The valve member control gear, it is used for switching fast between first settling position and the second place when filling, and remains in the fully open position at the described first settling position valve member, remains in operating position at described second place valve member.

2. float valve as claimed in claim 1 is characterized in that: also comprise the float that acts on described valve member control gear.

3. float valve as claimed in claim 2 is characterized in that: described valve member has head and valve rod, and head is by moving on the valve seat, and valve rod extends from head, and described control gear acts on valve rod.

4. float valve as claimed in claim 3 is characterized in that: first elastic device makes valve member be offset towards operating position.

5. float valve as claimed in claim 2 is characterized in that: described control gear is used for engaging with valve rod, floats to predetermined fluid level so that valve member remains on the fully open position until float.

6. float valve as claimed in claim 3, it is characterized in that: described valve rod is formed with the part of relatively large cross section, this part is connected with the tail end section of the cross section with relative reduction, be formed with shoulder in the joint, wherein control gear comprises transversely movable sliding element, and sliding element is under described first settling position is bonded on shoulder.

7. float valve as claimed in claim 6 is characterized in that: second elastic device makes sliding element be offset to first settling position.

8. float valve as claimed in claim 7, it is characterized in that: described float is used to be pressed in sliding element, the situation that causes the liquid level rising according to the fluid topping up, horizontal the moving of sliding element is pressed on second elastic device, to discharge the valve rod shoulder, and thus valve member is discharged from open position, described first elastic device forces it to arrive operating position fast.

9. as claim 6,7 or 8 described float valves, it is characterized in that: described float is used to be pressed in described valve rod, according to fluid level decline situation, act on the power opposite with the active force of first elastic device, when float drops to predetermined level, force the shoulder of valve rod to engage, make valve member remain on the fully open position thus with sliding element.

10. float valve as claimed in claim 3 is characterized in that: described control gear is arranged in the independent attaching enclosure that joins with shell, and valve rod extends into wherein.

11. float valve as claimed in claim 8 is characterized in that: described float is provided with float arm, and by float arm float pivotal rotating, float arm has first actuation surfaces that engages with sliding element.

12. float valve as claimed in claim 9 is characterized in that: described float is provided with float arm, and by float arm float pivotal rotating, float arm has second actuation surfaces that engages with described valve rod.