CN1051236A

CN1051236A - The non-return device of safety check form

Info

Publication number: CN1051236A
Application number: CN 90108770
Authority: CN
Inventors: 康拉德·贝格曼
Original assignee: Ideal Standard GmbH
Current assignee: Ideal Standard GmbH
Priority date: 1989-10-27
Filing date: 1990-10-27
Publication date: 1991-05-08
Also published as: DE4033925A1

Abstract

A kind of non return part that is safety check, have a static valve seat and match with it with the movable occlusion of spring compression, thereby can link to each other with MEDIA FLOW siphunculus road, even when pressure reduction is very little, also can guarantee the reliable unlatching of valve, and close reliably by brute spring assurance.The periphery of valve seat 12 is provided with annular opening 13 for the medium in the circulation pipeline 10,11, and occlusion 15 is used to close opening 13 ringwise, and central opening 18 links to each other with downstream side, and the section ratio pipeline cross section of valve seat 12 is little, and occlusion 15 has bigger fluid power acting surface.

Description

The non-return device of safety check form

The present invention relates to a kind of non-return device that is the safety check form, the movable occlusion that it has a static valve seat and matches with it with spring compression, thus can link to each other with MEDIA FLOW siphunculus road.

To the fitness for purpose of non return part normally, such as prevent when the influent stream side pressure reduces that air from infiltrating the influent stream pipe or the liquid that prevents to have flow through or gas backstreaming to the influent stream pipe.The water that refluxes when linking to each other, the most important thing is to prevent that sealing is back in the intake pipe especially, because may no longer meet edible demand with water supply installation.

Known and can adopt safety check to prevent backflow, movable occlusion wherein compresses towards static valve seat direction with spring.Problem of general existence in this safety check, promptly hour at the influent stream side of pipeline and the pressure reduction between the downstream side, can only adopt softer spring to provide required spring load, so that the pressure that acts on occlusion in the influent stream side is held open occlusion when being slightly larger than spring-loaded power to occlusion.Make closure of check ring if flow to counter-rotating, then can not carry out the closing motion of occlusion really, this moment, available soft spring power can not provide any further essence to help to this process.

If when the seal action of above-mentioned parts suffered damage owing to the incrustation on valve seat and/or the occlusion or corrosion, then this action to this type safety check was unfavorable especially.Find afterwards, make occlusion be resisted against on the valve seat less spring force deficiency so that valve seat seal fully.It also is not all right keeping sealing with the increasing spring force when small pressure difference, because can not guarantee at this moment that as mentioned above valve is in opening state, perhaps produces the throttle that can not allow when media flow.

Therefore, purpose of the present invention promptly provides a kind of non-return device that starts described type, even can guarantee that also valve is in opening state during the low differential pressure on the one hand between influent stream side and downstream side, even guarantee the reliable sealing of valve on the other hand when sealing state is impaired.

Can know in conjunction with the content of this specification and claims and to see the means of finishing above-mentioned purpose, comprise embodiment and improve the advantage of structure.

Basic design of the present invention is, is useful on the annular opening of medium circulation around the seat design Cheng Zaiqi, and annular occlusion is used to close above-mentioned opening.The annular occlusion has a central opening to link to each other with downstream side.Valve seat sectional area ratio pipeline sectional area is little, and occlusion has a bigger fluid power acting surface.This has an advantage, can adorn a harder spring like this and promote its closing motion on occlusion because valve plug spare influent stream side has a big fluid power acting surface promptly especially, and this has guaranteed reliably closing of when low pressure appears in influent stream side occlusion.Simultaneously, although adopted quite hard spring,, be in reliable enable possition can guarantee valve because occlusion has bigger fluid power acting surface.Also have such advantage, promptly the structure of described scheme is simple, and manufacture cost is lower, and compatible with other equipment.

The present invention also has an advantage, spring force might be designed greatly to four times or more, because in principle, the big I of occlusion influent stream side fluid power acting surface is designed to any desired value, just considers just limited from reality.

According to preferred embodiment of the present invention, seat design becomes tabular and uses the rod member that links to each other with tube wall to remain on the middle position of pipeline, thereby flow-through opening is between rod member.In this embodiment, occlusion is designed to annular membranaceous, and its outer periphery link to each other with tube wall, and its inboard around central opening links to each other with spring.This film preferably has seal ring to be used for linking to each other with tube wall in its outer periphery, and peripheral region has inner seal ring to link to each other with effect spring thereon within it.

The spring that acts on the film is a pressure spring, and it compresses to the valve seat direction, and the inner seal ring of film leans against on the valve seat when valve is in the closed position like this.

According to the present invention, valve body can separate, and is used for supporting valve seat and film, and it has joint to embed pipeline.Preferably, this valve body is designed to twist two housing parts that close mutually, thereby the outer seal ring of film can be inserted therebetween.

Yet the present invention is not limited to occlusion is designed the form of film forming, and occlusion also can be replaced by the annular piston of a spring-loaded axial activity.

Embodiments of the invention are shown in the drawings, will be described below.Accompanying drawing is:

Longitudinal section when Fig. 1 is in opening state for non-return device of the present invention;

Longitudinal section when Fig. 2 is in closed condition for non-return device;

Fig. 3 is in opening state same as shown in Figure 1 for another embodiment's non-return device;

Fig. 4 is in closed condition for the non-return device of Fig. 3;

Fig. 5 has shown that the non-return device among Fig. 1 and Fig. 2 links to each other with the washstand electric hybrid module, and the washstand electric hybrid module is provided with the scalable flexible pipe of band basket strainer;

Fig. 6 has shown in the project organization of compactness of the non-return device among Fig. 3 and Fig. 4 and has been connected with bathtub water-filling device and basket strainer assembly.

Non-return device shown in Fig. 1 and Fig. 2 is designed to embed the flowing valve in gas or the liquid line, and its housing 9 is tightened mutually by

parts

7 and 8 and formed, and parts 7 have influent stream joint 10, and parts 8 have the stream of going out joint 11.

Joint

10 and 11 joins with not shown gas or liquid medium circulation duct by screw thread.

As seen, static tabular valve seat 12 is positioned at valve passage central authorities among the figure, and it links to each other with parts 7 with rod member 14.Parts 7 are designed to one with rod member 14 and valve seat 12.Access portal 13 ringwise, between the rod member 14 of valve seat 12 peripheries.

Occlusion 15 is positioned at the downstream side 11 of valve seat 12, makes with elastic membrane.Film 15 is circular, has a bigger central opening 18 to be used for circulation medium on it, and it aligns with tabular valve seat 12.The outer periphery of film 15 have a seal ring 20, and the sealing ring is clamped between the

parts

7 and 8 of valve body 9, thereby keep sealing.Second seal ring 19 is positioned at the inner circumference edge of occlusion 15, and occlusion 15 is around central opening 18, and it links to each other with axial pressure spring 17 ends of valve body 9, and the spring the other end is supported by retaining ring 21.Inner seal ring 19 cooperates with valve seat 12 when valve is in the closed position, and like this, even spring 17 pines, inner seal ring still can be parked on the surface of valve seat 12.

As seen from the figure, valve seat 12 is surperficial less; On the other hand, the diameter of circular membrane 15 and fluid power acting surface 16 are more much bigger than valve seat 12.

Under flowing state shown in Figure 1, the film with inner seal ring 19 rises from valve seat 12, and like this, water can pass the access portal 13 around the valve seat 12 and flow through the central opening 18 of film 15.Because the influent stream side of film 15 has bigger fluid power acting surface, the hydraulic pressure of influent stream side 11 is higher a little, just is enough to strut have big powerful pressure spring 17, thereby valve is held open.If influent stream side 10 pressure reduce, brute spring 17 is pressed onto film 15 and seal ring 19 thereof on the valve seat 12 immediately, like this at state shown in Figure 2, has formed the reliable sealing of downstream side 11 with respect to influent stream side 10.Thus, closing motion is undertaken by pressure spring 17, and carries out comparatively fast, and the pressure reduction between influent stream side and the downstream side is irrelevant.

Fig. 3 and non-return device shown in Figure 4 are an angle valve.Because wherein each parts come down to be equal to the same piece number of therefore corresponding parts employing with non-return device illustrated in figures 1 and 2.

Non-return device among Fig. 3 and Fig. 4 and difference illustrated in figures 1 and 2 be, the influent stream parts 7 of housing 9 are designed to a knuckle spare, and joint 10,11 usefulness internal thread rather than outside threads are so that be threaded with not shown pipeline.

Fig. 5 has shown washstand electric hybrid module 22, and it is provided with the scalable outlet pipe 23 of band basket strainer 24.Cold water and hot water charge into by two connecting pipelines 25 of assembly 22, and in the drawings, two pipelines 25 forward lap.Utilize commutator 26, can supply water by connecting tube 27 and give for example not shown washing machine.Outlet pipe 23 and basket strainer 24 thereof supply water by connecting tube 28.Non-return device of the present invention as shown in Figures 1 and 2 is connected between the lower end and outlet pipe 23 of connecting tube 28.

Fig. 6 has shown the bathtub water-filling device and the basket strainer assembly 30 of compact design.Cold water and hot water charge into by two pipelines of assembly 30, and among the figure, two pipelines forward lap.Utilize reversing piece 32, can open bathtub tailrace (electric hybrid module water outlet 33) or basket strainer water outlet 34 on demand.The safety check 36 of Fig. 3 and Fig. 4 is connected between two intake pipes 31 and the common inipple 36.

Even when valve seat and valve plug spare are in abominable situation owing to fouling or corrosion, non return part of the present invention still can be in influent stream end low pressure and oppositely be closed reliably during crossfire; Even the throttling that it also can keep open fully and avoid not allowing taking place when low differential pressure.

Mention, above-mentioned design is embodiments of the invention, and the invention is not restricted to this; On the other hand, in imagination scope of the present invention, have many other embodiment or application examples.Especially, the application of non-return device of the present invention is not limited to the health water supply installation.

In above-mentioned specification, claims, summary and object features that these files of accompanying drawing disclosed can be independently also can of the present inventionly differently implement structures and arbitrarily mutually combine according to implementing.

Claims

1, a kind of non-return device that is the safety check form, has the movable occlusion that a static valve seat and matches with it with spring compression, thereby can link to each other with MEDIA FLOW siphunculus road, it is characterized in that: the periphery at valve seat 12 has opening 13, the medium in the pipeline 10,11 that is used to circulate, and occlusion 15 is ringwise, be used to close opening 13, central opening 18 is communicated with downstream side, and the sectional area ratio pipeline of valve seat 12 is little, but occlusion 15 has a bigger fluid power acting surface.

2, non return part as claimed in claim 1 is characterized in that, valve seat 12 is tabular, and uses the rod member that links to each other with tube wall to remain on the middle position of pipeline 10,11, and opening 13 is between rod member 14.

3, non return part as claimed in claim 1 or 2 is characterized in that, occlusion 15 is made of a film, and the outer periphery of film link to each other with tube wall, and the inner circumference edge in central opening 18 outsides links to each other with spring 17.

4, non return part as claimed in claim 3 is characterized in that, the outer periphery of film 15 have a seal ring 20 to be used for linking to each other with tube wall, and its inner circumference edge has seal ring 19 to link to each other with spring 17.

As claim 3 or 4 described non return parts, it is characterized in that 5, the spring 17 that acts on the film 15 is designed to a pressure spring and is pressed on valve seat 12 directions, the inner seal ring 19 of film 15 leans against on the valve seat 12 when closed position like this.

As the described non return part of claim 1 to 5, it is characterized in that 6, valve body 9 is separable and have joint 10,11 to be used for access medium circulation pipeline, is used for supporting valve seat 12 and film 15.

7, non return part as claimed in claim 6 is characterized in that, valve body 9 is made up of two parts 7,8, and both screw mutually, and the outer seal ring 20 of film 15 is embedded between the housing parts 7,8.

As claim 1 or 2 and 6 described non return parts, it is characterized in that 8, occlusion is an axially movable annular piston by spring compression.