DE102015107861A1 - Double check flap valve - Google Patents

Abstract

The invention relates to a double check valve for blocking the flow of gaseous and / or liquid media in pipes, hoses or the like, with a housing (11) for installation in a media-carrying pipeline, wherein the housing (11) has a flow channel (12) whose flowed through cross section by two check valves (16), wherein the two check valves (16) are mounted on a flow channel (12) arranged axis (18) and for closing the flow channel (12) for sealing engagement with a seat (19) of the Valve (11) can be brought. The invention is characterized in that the check valves (16) and the seat (19) mounted on the axle (18) form an assembly (24), and in that the assembly (24) is detachably arranged in the valve (11), the assembly (24) can be installed or removed in or out of the valve (11).

Description

The invention relates to a double check valve for (independent) blocking the flow of gaseous and / or liquid media in pipes, hoses or the like, with a housing for installation in a media-carrying pipeline, wherein the housing has a flow channel, the flow-through cross-section through two check valves closed is, wherein the two non-return valves are mounted on an axis arranged in the flow channel and can be brought to close the flow channel for sealing engagement with a seat of the valve, according to the preamble of claim 1.

Such valves are known in practice in numerous embodiments. Such a valve from the house of the applicant is for example from the DE 10 2007 057 663 A1 known.

On this basis, the invention is based on the object to further develop valves of the type mentioned.

A valve for achieving this object has the features of claim 1. It is therefore provided that the check valves mounted on the axle and the seat form an assembly, and that the assembly is detachably arranged in the valve, such that the assembly without disassembly in or out of the valve is on or removable.

This solution has the particular advantage that both the flaps and the seat for flushing the line (for example, at the first start-up of the line) can be removed. This is also possible if the housing is firmly connected to the lines, for example by welding.

According to a preferred development it can be provided that the assembly is fastened by means of a ring nut in the housing, wherein the housing has an internal thread into which an external thread of the ring nut is screwed, and wherein the assembly by the ring nut sealingly pressed against a seat in the housing becomes.

Alternatively it can be provided that the assembly has a flange, via which the assembly in the region of a seat in the housing can be fastened.

Another special feature may consist in that the housing has a media-tight sealable opening for the module, you can use the assembly in the housing or can be removed therefrom.

Two preferred embodiments of the invention will be described below with reference to the drawing. In this show:

1 a spatial representation of a first embodiment of a valve in partial representation,

2 a vertical section through the valve along section line II-II in 3 .

3 a vertical section through the valve along section line III-III in 2 .

4 a horizontal section through the valve along section line IV-IV in 2 .

5 a detail of 2 on an enlarged scale,

6 a spatial representation of a second embodiment of a valve,

7 a vertical section through the valve according to 6 along section line VII-VII in FIG 9 .

8th a vertical section through the valve according to 6 along section line VIII-VIII in 7 .

9 a horizontal section through the valve according to 6 along section line IX-IX in FIG 8th , and

10 a detail of 7 on an enlarged scale.

This in 1 to 5 double check valve shown 10 , hereafter short valve 10 called, is intended for installation in a pipe, not shown. The pipeline can be used to transport gaseous or liquid media. In practice, solids may also be transported together with the gaseous or liquid media.

The valve 10 has a housing 11 , For installation between pipelines, the housing 11 Have flanges.

The housing 11 is with a flow channel 12 interspersed through the housing 11 extends, namely from an inflow opening 13 up to an outflow opening 14 , The flow channel is limited 12 from a circumferential wall 15 of the housing 11 ,

In the case 11 are two check valves 16 arranged, with the help of which the flow of the medium can be stopped. The two check valves 16 are over bushings 17 at a central axis 18 stored. About the bushings 17 are the check valves 16 between a closed position in which they lock the flow and an open position pivotable.

In the case 11 is also a seat 19 for the check valves 16 educated. The seat 19 is as a separate, preferably ring-like organ circumferentially on the wall 15 of the housing 11 arranged and has a seat 20 on, on the check valves 16 in closed position.

Furthermore, in the housing 11 a footbridge 21 arranged, extending across the flow channel 12 extends. A back of the dock 21 also serves as a seat 20 for facing areas of the check valves 16 ,

Furthermore, flap springs 22 provided, as usual, the check valves 16 press in the closed position. The spring force of the flap springs is 22 so dimensioned that overcome the spring force and the valve at a predetermined media pressure 10 or the two non-return valves 16 be opened.

In the area of lateral free ends of the axle 18 this is on the jetty 21 secured against rotation. With the help of bolts 23 there is the axis 18 at the jetty 21 attached.

A special feature is that the seat 19 and the check valves 16 together an assembly 24 form and as such a unit in the housing 11 can be installed or removed.

In this way it is possible the assembly 24 or the seat 19 and / or the check valves 16 and / or other parts of the assembly 24 to maintain or check in a dismantled state, for example, on function, tightness, etc.

In addition, when removed module 24 the purging and / or a pressure test of the line regardless of the direction of flow of the medium possible.

To access the module 24 to obtain, has the housing 11 over a top opening 25 by means of a lid 26 Media-tight is closed.

The assembly 24 is preferably media-tight with the housing 11 or the walls 15 the same connectable. This purpose is a ring nut 30 with an external thread 27 , as well as a corresponding internal thread 28 in the wall 15 of the housing 11 , With the help of the ring nut 30 leaves the assembly 24 in a simple way in the housing 11 fasten by z. As a fitter, the assembly 24 captured and through the opening 25 in the case 11 used and there by means of the ring nut 30 firmly screwed on. Conceivable, of course, other suitable connecting means, such as shown in the second embodiment.

Furthermore, in the walls 15 a seat 29 for the assembly 24 provided, which is molded accordingly and against the assembly 24 through the ring nut 30 is pressed sealingly.

The orientation of the assembly 24 or the flap springs 22 in the case 11 can by means of a tab or pin 34 be predetermined, the off-center on the housing 11 is arranged and in a corresponding hole 35 or a corresponding blind hole in the assembly 24 intervenes. In this way, the correct mounting of the assembly 24 be guaranteed.

The housing 11 or the walls 15 the same are constructed so that no media can accumulate, for example in the form of puddles in recesses in the housing 11 , In this way it can be prevented that liquids stored in LNG (liquefied natural gas) are frozen and the valve freezes 10 or individual components of the same are damaged.

In the present embodiment of the invention, the assembly consists 24 at least from the seat 19 as well as the two non-return valves 16 , It is understood, however, that also other components may belong to the assembly, such as the web 21 , the flap springs 22 or similar.

In the 6 to 10 shown variant of the valve 10 has substantially the same features or advantages as the valve shown above 10 and differs only in the assembly of the assembly 24 in the case 11 ,

For this purpose, the assembly 24 instead of a thread or a ring nut 30 a circumferential flange 32 on, over which the assembly 24 by means of bolts 33 on the housing 11 or in the area of the corresponding circumferential seat 29 is attached.

LIST OF REFERENCE NUMBERS

10

Valve

11

casing

12

Flow channel

13

inflow

14

outflow

15

wall

16

check valve

17

bearing bush

18

axis

19

Seat

20

seat

21

web

22

flap spring

23

bolt

24

module

25

opening

26

cover

27

external thread

28

inner thread

29

Seat

30

ring nut

31

bolt

32

flange

33

bolt

34

pen

35

drilling

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007057663 A1 [0002]

Claims (4)

Double check valve for blocking the flow of gaseous and / or liquid media in pipelines, hoses or the like, comprising a housing ( 11 ) for installation in a media-carrying pipeline, wherein the housing ( 11 ) a flow channel ( 12 ), whose flow cross section through two check valves ( 16 ) is closable, the two check valves ( 16 ) at one in the flow channel ( 12 ) arranged axis ( 18 ) and for closing the flow channel ( 12 ) for sealing engagement with a seat ( 19 ) of the valve ( 11 ) are brought, characterized in that the at the axis ( 18 ) mounted check valves ( 16 ) and the seat ( 19 ) an assembly ( 24 ) and that the assembly ( 24 ) detachable in the valve ( 11 ) is arranged such that the assembly ( 24 ) into or out of the valve ( 11 ) is expandable or expandable. Valve according to claim 1, characterized in that the assembly ( 24 ) by means of a ring nut ( 30 ) in the housing ( 11 ) is attachable, wherein the housing ( 11 ) an internal thread ( 28 ) into which an external thread ( 27 ) of the ring nut ( 30 ) is screwed, and wherein the assembly ( 24 ) through the ring nut ( 30 ) sealing against a seat ( 29 ) in the housing ( 11 ) is pressed. Valve according to claim 1, characterized in that the assembly ( 24 ) a flange ( 32 ), over which the assembly ( 24 ) in the area of a seat ( 29 ) in the housing ( 11 ) is attachable. Valve according to claim 1, 2 or 3, characterized in that the housing ( 11 ) a media-tight sealable opening ( 25 ) for the assembly ( 24 ), you have the assembly ( 24 ) in the housing ( 11 ) can be used or removed from this.

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