DE102005009438A1 - Gas flow monitor consists of housing with valve seat and guide for locking body with a set locking discharge value in an open position and has inclined valve axis opposite the valve, seat, locking body and guide - Google Patents

Abstract

The gas flow monitor comprises a gas-tight housing (1) that has a valve seat (2) inside and a guide (7) for a longitudinally moving locking body (8) whose weight characteristics and/or spring tension is held against the through-flow direction in the open position. Hence, at the discharge cross section, the surface of the locking body and the prevailing forces are firmly set that it is isolated at defined value of the locking discharge in its open position and moved against the valve seat of the housing. There is a valve axis (18) opposite the housing axis (17) that is inclined from the valve seat, locking body and guide. The valve axis may be inclined at angle of around 45 degrees or 90 degrees. The guide of the locking body may be connected with a plug (5) that lies in an axial direction and whose spacing is adjustable between the locking body and the valve seat.

Description

technical area

The The invention relates to a gas flow monitor for automatic shut-off of gas lines when an inadmissible increase in flow occurs.

Such Gas flow monitor, the in pipelines, such as gas valves, gas appliances, etc., are used in a variety of designs. They serve to increase of gas consumption over a predetermined value, as in case of accidents in the downstream line network z. B. in pipe damage the case is to interrupt the gas supply.

For example in WO 92/01184 a gas flow monitor called a safety closing device is the described in the beginning, which in case of damage occurring Piping this closes, but without premature close lead the supply line, if a consumer over a longer period of its Performance corresponding amount of gas needed. In this safety locking device a valve is designed as a poppet valve.

there is the valve body mounted on a valve stem, the both sides in plain bearings slidable in the axial direction of the valve against the force of a spring is stored. The valve disk acts with one, in one of two annular discs located valve seat together, the annular discs at the same time as storage for the slide bearings already mentioned above serve. The washers are provided with recesses or openings.

Furthermore is from GB-PS 556,863 an automatically acting shut-off valve known. This shut-off valve consists of a connection thread on both sides having, tubular Casing. In the case is one with breakthroughs arranged annular disc, the center of a plain bearing for a longitudinally movable Valve stem having a valve body at one end, the one with in the housing located valve seat cooperates. One on the one hand on the valve body and on the other supporting on the annular disc Pressure spring holds the valve body until reaching the set closing flow in open position.

A similar one Construction has a valve described in U.S. Patent No. 3,794,077. One is located on the one hand in a housing, and also breakthroughs having sliding bearing and on the other hand on one on the valve stem screwed nut supporting itself Compression spring holds the valve body until reaching the set closing flow in open position.

all these solutions It is common that by the force acting on the valve plate force the spring, which holds the valve disc against the gas flow in the open position, the Closing flow, i.e. the gas flow at which the safety device closes is determined becomes. The setting of a defined value of the Reseat flow generally by the manufacturer of such gas flow monitor in the Frame of manufacture.

at all of these described embodiments It is now disadvantageous that the value of the closing flow only for the existing installation position of the adjustment made Gas flow monitor applies, otherwise except the spring also the weight of the valve disk and possibly further combined with him items works. So have the gas flow guard in the mounting position vertically down a smaller closing flow and in the installation position vertically upwards a higher closing flow as in a horizontal installation. This deviation is special then very big, if it is gas flow monitor with is very small pressure difference, because here the spring force especially must be low, the weight of the valve disk so a larger share Has.

The means that contrary to the requirement to achieve the greatest possible Safety a correspondingly large tolerance of the closing flow be accepted in the concession of several mounting positions must or must for the different mounting positions different variants are available. This in turn has increased Production and storage costs result.

presentation the invention

Of the Invention is based on the problem, a gas flow monitor the to develop the type mentioned, in which the closing flow in several mounting positions has the same value. According to the invention, the problem is thereby solved, that of a valve seat, a valve seat associated Closing body and a guide formed for the closing body Valve axis opposite the housing axis is inclined.

Thus, a solution was found with which the previous disadvantage of the prior art that a gas flow monitor is only suitable for a specific installation position has been eliminated. By the inclined arrangement of the axis of the valve seat, guide and closing body valve to the axis of the housing in which the valve is located, there are several mounting positions in which the influence of the weight of the moving parts on the spring force is identical, so that in all This installation results in the same closing flow.

Further advantageous embodiments of the invention go out of the others Claims. So it turns out to be particularly favorable if the valve seat, Closing body and Leadership educated Valve axis opposite the housing axis to 45 ° or inclined by 90 ° is.

at an inclination of 45 ° as possible Mounting positions of the housing the gas flow monitor the horizontal installation and vertical installation with flow direction up. These two installation positions can be considered as the majority of installation cases become. additionally it proves to be particularly advantageous in this connection that in this embodiment, a simplification to that effect possible is that the use of a recoil spring is not required when the flow cross-section is adjusted so that with its own weight of the closing body of the desired closing flow arises.

at an inclination of the o.g. Axes at 90 ° to each other is indeed the Use of a closing spring absolutely necessary, but it results in an advantageous embodiment, the for the applications thought is where the case mounted parallel to a vertical wall. If namely the Axis of the valve is perpendicular to this wall, the housing can be in any Able to be placed in front of this vertical wall, not only vertical or horizontally.

Furthermore proves to be an execution as advantageous in which the leadership of the closing body with a plug is connected, the position in the axial direction, and so that the distance between the closing body and the valve seat in Open position, adjustable. This is a simple and accurate Adjustment of the closing flow possible.

A especially for manufacturing reasons very favorable solution arises when Valve seat, guide and closing body in one Insert located in housing can be used, for example, in different connection variants can give. In this case, advantageously, the insert can be designed in such a way that that it has one or more support points for supporting the guide, which serve for the axial positioning of the closing body to the valve seat.

Around Also in this embodiment, a way to adjust the closing flow it is possible the distance between the closing body and the valve seat in the open position to make it changeable that at least a support point is formed as a locking edge, which then in a of several on the circumference of the guide introduced Rasteinstichen engages, with each locking instep a defined value of the closing flow assigned.

Around do not make the adjustment step by step but sliding can is an advantageous solution to be seen in that the use of receiving ribs with respect to the Valve seat has centric positioning of the guide, which is then through a clamped on the receiving ribs retaining ring is clamped.

A Another embodiment is that in a housing more Valve seats with associated closing bodies and guides are arranged so that of each mutually associated valve seat, closing body and guide formed axes are identical with respect to the housing axis inclined. there each valve seat is assigned its own gas outlet.

Thereby can be easily associated with each consumer a gas flow monitor be with his closing flow tuned to the consumer, allowing the highest level of safety is reachable.

Furthermore Is it possible the distributor housing from individual manifold modules, with each manifold module having a gas flow monitor.

The The invention will be described in more detail below with reference to several exemplary embodiments. Show it:

1 a first embodiment of a gas flow monitor according to the invention in a sectional view in the open position,

2 A second embodiment of a gas flow monitor according to the invention in a sectional view in the open position,

3 A third embodiment of a gas flow monitor according to the invention in a sectional view in the open position,

4 an embodiment of a distributor with gas flow monitors according to the invention,

5 another embodiment of a manifold with gas flow monitors according to the invention.

That in the 1 illustrated embodiment of a gas flow monitor according to the invention has a tubular housing 1 , the input and output side with a connection thread 19 , In this case, an internal thread on both sides, is provided for connection to a horizontal or vertical gas line, not shown.

In the case 1 is at an angle of 45 ° to the housing axis 17 a valve seat 2 incorporated. Escaping to the valve axis 18 of the valve seat 2 owns the housing 1 an outwardly and inwardly projecting tubular receptacle 3 that has a set screw thread 4 in which a stopper 5 is screwed. About an O-ring 6 the gas tightness is guaranteed. In extension of the plug 5 is on the valve seat 2 facing end a cup-shaped guide 7 also aligned, screwed in this case.

A the valve seat 2 assigned closing body 8th is on a pen 9 attached, in the lead 7 is guided longitudinally movable. A first depository for the pen 9 is through one in the front of the guide 7 located hole 10 formed while the second bearing by one on the pin 9 attached spring plate 11 is formed on the inner wall of the guide 7 to be led. Under the force of a in the cavity 12 located and on the spring plate 11 acting spring 13 becomes the closing body 8th held in its open position. In this case, the outer end of the guide is used 7 at the same time as a stop for the closing body 8th in open position.

In order to adjust different closing flows, the position of the closing body 8th to the valve seat 2 about the screw-in depth of the plug 5 in the adjusting thread 4 adjustable. About two stops 14 ; 15 the minimum value and the maximum value of the adjustable closing flow are limited. The attacks 14 ; 15 Also make sure that the O-ring 6 within the recording 3 remains.

To prevent accidental adjustment of the selected closing flow, is the adjustment of the plug 5 only possible with special tool, in this example a position cam 16 ,

The gas flow monitor described in this embodiment is intended for installation in a horizontally or vertically extending gas line, wherein in a vertically extending gas line, the flow direction of the gas marked with an arrow has to take place from bottom to top. The operation of this gas flow monitor is as follows:
The gas flow monitor is factory set in one of the approved mounting positions by adjusting the screwing depth of the plug 5 adjusted to a certain value of the closing flow using appropriate adjusting and testing devices.

When installed in a horizontal gas pipe is the housing 1 Now screw in so that the visible outwardly projecting tubular receptacle 3 pointing down. It is, as with the installation in a vertical gas line, which is indicated by the arrow in the representation of 1 indicated flow direction of the gas through the housing 1 observed. Normally, the results in the in 1 illustrated position that the closing body 8th under the action of the spring acting against the flow 13 and the proportionately acting own weight is held in open position.

Occurs due to damage to a downstream gas line or a downstream defective consumer on a lying above the closing flow gas consumption, so by increasing the flow, the force of the spring 13 overcome, and the closing body 8th takes the closed position. The gas supply is interrupted.

There now in both mounting positions, the effect of its own weight remains unchanged, also remains the value of the closing flow unchanged.

Also in the 2 illustrated embodiment of a gas flow monitor according to the invention has a tubular housing 1 , but this time as a connecting thread 19 On the input side is provided with an external thread and the output side with an internal thread for connection to the horizontal or vertical gas line, not shown.

In contrast to the first embodiment described above, this time is the valve seat 2 in an insert 20 integrated into the housing 1 einbringbar and by means of a snap ring 21 , the side stops 22 attacks, is secured in its position. About an O-ring 23 the sealing is guaranteed. The valve axis 18 is in turn, as shown, at an angle of 45 ° to the housing axis 17 inclined. The leadership 7 lies on the insert 20 located support points 24 on who the lead 7 and with that on the in the lead 7 guided pen 9 fastened closing body 8th centric to the valve seat 2 position. Furthermore, the guide 7 with a cover ring 26 provided, which includes the closing body in the first part of the closing stroke. Through openings 27 becomes the effect the flow pressure on the closing body 8th ensured. To be gas-tight in the closed position, is the closing body 8th additionally with an O-ring 25 Mistake.

On the scope of the guide 7 are several clicks 28 introduced, in one of these locking stitches 28 engages a advantageously formed by a support point locking edge 29 one. Through the different locking stitches 28 is the distance between the closing body 8th and the valve seat 2 adjustable, so that a set of predetermined values for the closing flow is created. To avoid adjustments tensioned a spring clip 30 the leadership 7 against the pads 24 and the locking edge 29 ,

The pencil 9 is in the cavity 12 the leadership 7 through a disk attached to it 31 guided, with the fit between the disc 31 and the inner wall of the guide 7 is kept very tight. The open side of the leadership 7 is through a lock 32 closed, so in the lead 7 a closed space is created.

On a spring 13 can be omitted in this embodiment, since the weight of closing body 8th , Pen 9 and disc 31 always acts in the permissible installation positions in the same size in the opening direction and thus replaces the spring force.

The operation of the gas flow monitor described in this embodiment is in principle the same as in the first embodiment explained above, since the possible mounting positions are identical. In addition to the already mentioned omission of the spring 13 However, this gas flow monitor has another special feature.

Moves the closing body 8th and with it the disc 31 in the direction of the valve seat 2 , that must be in the cavity 12 located gas through the due to the small fit very narrow gap between the wall and the disc 31 flow, so that the closing process is subdued. Furthermore, by the cover ring 26 achieved that the flow cross-section in the initial stroke, ie as long as the closing body 8th in the area of the cover ring 26 is not diminished. The pressure on the closing body 8th stay constant. When short-term flow peaks occur, as they can occur during switching operations in normal gas operation, the closing body 8th Although moved from its rest position, but then goes back to its original position. The gas flow monitor closes only if the value of the closing flow is exceeded for a longer time.

In 3 another gas flow monitor according to the invention is shown, which is for the arrangement in front of a vertical wall 33 is provided. The gas flow monitor has a tubular housing 1 , whose input side by an externally threaded screwed socket 34 is formed, while it is provided on the output side with an internal thread for connection to the gas line, not shown.

As well as in 2 shown and described above embodiment is the valve seat 2 in an insert 20 integrated into the housing 1 can be introduced. Through the mounting boss 34 he is fixable in his position. About an O-ring 23 the sealing is ensured again. In contrast to the embodiment described above, this time is the valve axis 18 , as shown, at an angle of 90 ° to the housing axis 17 inclined.

The use 20 has three pick-up ribs 36 on who the lead 7 encompassed on the circumference and thus on the in the leadership 7 guided pen 9 fastened closing body 8th centric to the valve seat 2 position. The distance between the closing body 8th and the valve seat 2 is infinitely adjustable, so that the value for the closing flow can be adjusted within the scope of production. To avoid adjustments after the adjustment has been made on the receiving ribs 36 a retaining ring 37 pressed on the leadership 7 on the receiving ribs 36 tightly clamped.

Again, the lead 7 with a cover ring 26 provided, which comprises the closing body in the first part of the closing stroke, through openings 27 the effect of the flow pressure on the closing body 8th is ensured. To be gas-tight in the closed position, is the closing body 8th again with an O-ring 25 Mistake.

The structure and the mode of action is otherwise as described in the second embodiment. However, since the valve axis is arranged horizontally, is in the cavity 12 the feather 13 arranged to the closing body 8th to hold in its open position.

This disadvantage that a spring 13 is needed, however, there is the great advantage that the housing 1 in any position in front of the vertical wall 33 can be arranged, not only vertically upwards or horizontally. It is only necessary that the valve axis 18 perpendicular to the wall 33 shows.

To mark this for the installer, it is possible, for example, the Schlüsselflä chen 38 of the housing 1 to be executed as a square. The use 20 is then in the case 1 Introduce that valve axis 18 perpendicular to two key areas 38 stands, which are then marked. During the installation then only these two key surfaces must 38 parallel to the wall 33 be aligned. Which of these two surfaces points to the front is irrelevant.

Of the Gas flow monitor according to the invention is Of course not on the illustrated individual embodiments limited. Rather, combinations are modifications and changes possible without the scope of To leave invention.

So it is understood that several of these explained in the above embodiments gas flow monitor can be accommodated in a so-called distributor. So is in 4 a distributor 39 exemplified as they are required in particular for the protection of gas pipes made of plastic. The distributor housing 39 has an inlet nozzle 34 in which, as required for plastic gas lines, an unillustrated thermally-triggering shut-off valve is integrated. In the distributor housing 39 are three of the in 3 integrated gas flow monitor, with each gas flow monitor a distributor output 35 which is directed downwards in this example.

Taking into account the statements made with regard to the individual exemplary embodiments, in particular with regard to the installation positions, the distributor can also have gas flow monitors with different values for the closing flow, different connecting threads and outlet directions. Likewise it is possible that the distributor, as in the 5 shown schematically, from individual distribution modules 40 which are assembled before assembly, with each distributor module 40 having a gas flow monitor.

1

casing

2

valve seat

3

admission

4

adjusting thread

5

Plug

6

O-ring

7

guide

8th

closing body

9

pen

10

drilling

11

spring plate

12

cavity

13

feather

14

attack (Minimum)

15

attack (Maximum value)

16

adjustment cams

17

housing axis

18

valve axis

19

connecting thread

20

commitment

21

snap ring

22

attack

23

O-ring

24

support point

25

O-ring

26

cover ring

27

opening

28

Rest puncture

29

catch edge

30

spring clip

31

disc

32

shutter

33

wall

34

Screwed

35

transfer output

36

receiving rib

37

retaining ring

38

key area

39

distributor housing

40

distribution module

Claims (10)

Gas flow monitor for the automatic shut-off of gas pipes, consisting of a gas-tight housing ( 1 ), which in its interior a valve seat ( 2 ) and one in a leadership ( 7 ) longitudinally movable closing body ( 8th ), which is held by its own weight and / or spring force against the flow direction in the open position, wherein flow cross section, surface of the closing body ( 8th ) and forces are set so that the closing body ( 8th ) leaves its open position at a defined value of the closing flow and against the valve seat ( 2 ) of the housing ( 1 ) is moved, so that in the closed position, the gas flow is prevented, characterized in that the valve seat ( 2 ), Closing body ( 8th ) and leadership ( 7 ) formed valve axis ( 18 ) opposite the housing axis ( 17 ) is inclined. Gas flow monitor for automatic shut-off of gas lines according to claim 1, characterized in that the valve seat ( 2 ), Closing body ( 8th ) and leadership ( 7 ) formed valve axis ( 18 ) opposite the housing axis ( 17 ) is inclined by 45 °. Gas flow monitor for automatic shut-off of gas lines according to claim 1, characterized in that the valve seat ( 2 ), Closing body ( 8th ) and leadership ( 7 ) formed valve axis ( 18 ) opposite the housing axis ( 17 ) around 90 ° is inclined. Gas flow monitor for automatic shut-off of gas lines according to one of the claims 1 to 3, characterized in that the guide ( 7 ) of the closing body ( 8th ) with a stopper ( 5 ), its position in the axial direction, and thus the distance between the closing body ( 8th ) and the valve seat ( 2 ) in the open position, is adjustable. Gas flow monitor for automatic shut-off of gas lines according to one of the claims 1 to 3, characterized in that valve seat ( 2 ), Closing body ( 8th ) and leadership ( 7 ) in one in the housing ( 1 ) insert ( 20 ) are located. Gas flow monitor for automatic shut-off of gas lines according to claim 5, characterized in that the insert ( 20 ) one or more support points ( 24 ) for the storage of the guide ( 7 ) for the axial positioning of the closing body ( 8th ) to the valve seat ( 2 ) having. Gas flow monitor for automatic shut-off of gas lines according to claim 6, characterized in that at least one support point ( 24 ) as a locking edge ( 29 ) formed in one of the circumference of the guide ( 7 ) introduced Rasteinstichen ( 28 ), whereby, depending on the selected locking instep ( 28 ) the distance between the closing body ( 8th ) and the valve seat ( 2 ) is adjustable in the open position. Gas flow monitor for automatic shut-off of gas lines according to claim 5, characterized in that the insert ( 20 ) Recording ( 36 ) with respect to the valve seat ( 2 ) centric positioning of the guide ( 7 ), which by a on the receiving ribs ( 36 ) pressed on retaining ring ( 37 ) is braced. Gas flow monitor for automatic shut-off of gas lines according to one of the claims 1 to 8, characterized in that in a distributor housing ( 39 ) several valve seats ( 2 ) associated with them closing bodies ( 8th ) and guided tours ( 7 ) are arranged so that the of each associated valve seat ( 2 ), Closing body ( 8th ) and leadership ( 7 ) formed valve axes ( 18 ) identical to the housing axis ( 17 ) are inclined, each valve seat ( 2 ) a distributor output ( 35 ) assigned. Gas flow monitor for automatic shut-off of gas lines according to claim 9, characterized in that the distributor housing ( 39 ) from individual distributor modules ( 40 ), whereby each distributor module ( 40 ) has a gas flow monitor.