DE202018005340U1 - Apparatus for damping a change in pressure of a medium - Google Patents

Abstract

Apparatus which is connectable to a measuring cell (30) for measuring a pressure of a flowing medium and adapted to damp a flow-induced change in the pressure of the medium, the apparatus (2, 40, 42) having n + 1 walls (10a, 10b, 10c, 10d, 10e), where n is an integer, has a first end portion (6) and a second end portion (8), each wall (10a, 10b, 10c, 10d, 10e) having a first edge and a second edge wherein all the first edges are connected to the first end part (6), all the second edges being connected to the second end part (8), a first central wall (10a) and first central parts of the two end parts (6, 8) defining a first central chamber (12a), wherein an n + 1th wall (10b, 10c, 10d) encloses in each case an nth wall (10a, 10b, 10c, 10d), wherein the nth wall (10a, 10b, 10c, 10d), the n + 1th wall (10b, 10c, 10d) and n + 1th sections of the two end parts (6, 8) is an n + 1 te chamber (12b, 12c, 12d, 12e) limit, wherein the n + 1-th chamber (12b, 12c, 12d, 12e), the n-th chamber (12a, 12b, 12c, 12d) encloses, each wall ( 10a, 10b, 10c, 10d, 10e) has at least one ventilation opening (16), one of the two end parts (6, 8) having in its first central section a measuring opening (18) for connecting the measuring cell (30).

Description

The invention relates to an apparatus for damping a change of a pressure of a medium and a device for measuring a pressure of a medium.

A gaseous medium has a pressure that can be measured with a suitable pressure gauge. However, it should be considered here whether the gaseous medium is, for example, static in a room or whether it flows dynamically through this room.

The publication DD 8527 describes a flow meter for pointwise measurement of flow pressures in steam, gas or liquid lines, in particular for determining a flow rate.

From the publication DE 30 39 144 C2 For example, a volumetric swirl flowmeter is known.

A device for measuring a level of a liquid is in the document DE 10 2014 009 610 A1 described.

The apparatus according to the invention can be connected and / or connected to a device for measuring a pressure of a flowing medium and designed to damp a flow-induced change in the dynamic pressure of the medium. The apparatus comprises n + 1 walls, where n is an integer, a first, for example, upper end part and a second, eg lower end part, each wall having a first, eg upper edge and a second, eg lower edge wherein all the first edges are connected to the first closing part usually gas-tight, wherein all the second edges are connected to the second end part usually gas-tight.

A first central wall and first central portions of the two end portions define a first central chamber through which a central axis passes, an n + 1th wall each having an nth wall in axial directions encloses, wherein the n-th wall, the n + 1-th wall and n + 1-th sections of the two end parts of an n + 1-th chamber or an n + 1-th space bound or enclosing, wherein the n + 1-th chamber encloses the n-th chamber or an n-th space in the axial direction. Each wall has at least one ventilation opening, d. H. only one ventilation opening or several ventilation openings, on, with usually only one of the two end parts has in its first central portion a measuring opening for connecting the device.

It is possible to measure with the presented apparatus a static pressure of the medium flowing outside the apparatus. It should be noted that the flowing medium outside the apparatus in addition to the static pressure u. U. also has a dynamic pressure, which results from a flow of the medium. This dynamic pressure is reduced with the presented apparatus. During operation of the apparatus, the medium traverses the walls and chambers in succession from the outside to the inside, the medium following a labyrinthine curve. In this case, the measuring opening in the first central section simultaneously forms a measuring opening of the first central chamber. At the measuring port, the static pressure of the medium prevailing in the central chamber can be measured without the dynamic pressure or at least with a high degree of attenuation.

n is at least as large as 1. In addition, n is a whole or natural, for example, single-digit number, 1, 2, 3, 4, 5, 6, 7, 8 or 9. n may optionally be a two-digit number.

The walls are in a possible embodiment cylinder or tubular or other shape, z. B. elliptical and enclose the example. Central axis which passes through the central chamber, wherein the walls have circular base surfaces. In an alternative or supplementary embodiment of the apparatus, it is possible for the walls to have m-angular, for example regularly m-shaped base surfaces and to be designed and / or designated as prisms. In this case, each corner of a m-shaped, prism-shaped wall to the example. Central axis at the same distance. Furthermore, it is provided that a running parameter I runs from 1 to m and denotes and / or defines an I-th corner of a wall which is generally m-angular. Furthermore, each corner of each wall is traversed by an edge, wherein all edges of all walls and the example. Central axis are oriented parallel to each other and / or arranged. In an embodiment, it is possible that all I-th corners all walls and the example. Central axis lie in a plane.

In an embodiment, the walls are arranged concentrically or axially symmetrically about the common, for example, the central axis, for example the axis of rotation, wherein the n + 1-th wall coaxially surrounds the n-th wall.

It is also possible that k vents each a wall relative to the example. Central axis at a regular angular distance of 360 ° / k to each other regularly arranged angularly offset or distributed.

Furthermore, at least two, d. H. a plurality of ventilation openings of the ventilation openings in each case a wall relative to the example. Central axis in a plane which is cut perpendicularly from the example. Central axis, arranged or distributed.

It is also possible that at least two, d. H. a plurality of ventilation openings each having a wall are arranged offset axially relative to the example. Central axis.

Furthermore, it is conceivable that the ventilation openings are randomly distributed or arranged in a respective wall.

In addition, it is conceivable for at least one ventilation opening of the nth wall and at least one ventilation opening of the n + 1th wall to be arranged angularly offset from one another relative to the central axis, for example at a regular angular distance of 360 ° / k.

Alternatively or additionally, at least one ventilation opening of the n-th wall and at least one ventilation opening of the n + 1-th wall are arranged offset axially relative to the central axis, for example.

The presented apparatus is arranged in an environment and bounded by the two end parts and an outermost wall to the environment and / or separated from the environment.

The apparatus is bounded by an outermost wall as part of a shell to an environment, wherein the outer wall encloses all other inner walls.

In addition, it is also possible that the apparatus is further limited by the two end parts as parts of the shell to the environment.

In this case, a deflecting module is arranged on the at least one ventilation opening of the outermost wall towards the environment, which is designed as a liquid barrier to prevent ingress of liquid from the environment into the apparatus.

For the apparatus with respect to gravity, for example. Gravity, an installation direction or installation position is provided. In this case, a drainage opening is arranged at a gravity with respect to the lowest point of the shell, which allows leakage of liquid from the apparatus into the environment.

In addition, it is provided that at least one unidirectional deflection module is arranged as a liquid barrier on the outermost wall, which allows leakage of liquid from the apparatus and difficult entry of the liquid from the environment into the apparatus. In addition, the drainage opening is arranged in the outermost wall or a closure part.

It is also possible that a connecting part for the device is arranged at the measuring opening of the apparatus, wherein the connecting part may be formed as a component of the apparatus and / or the device.

It is also possible that at least one chamber, i. H. a chamber or a plurality of chambers, for example, filled with a porous mass, a sponge, a gas-permeable filling or bulk material as a damping material for the medium, which fills the at least one chamber completely or partially.

As already stated above, the two edges are each connected to a wall with the two end parts usually gas-tight. This may mean that all the first edges of all the walls are gas-tightly secured to the first end part. As an alternative or in addition, all second edges of all the walls are attached in a gas-tight manner to the second end part. However, it is also possible that all the first edges of all walls with the first end part are releasably connected gas-tight again. As an alternative or in addition, all the second edges of all the walls are detachably gas-tightly connected to the second closure part again. Thus, it is also possible that all the walls are on the one hand gas-tightly attached to at least one end part and / or are releasably gas-tightly connected to at least one end part. This may mean, for example, that the first edges of the walls are attached in a gas-tight manner to the first end part, whereas the second edges of all the walls are detachably gas-tightly connected to the second end part or vice versa. If the walls are detachably gas-tight and / or connectable to a terminating part at least on one side, it is possible to remove this one terminating part and to open the apparatus in order to be able to clean it, for example its chambers and walls. A temporarily removed termination piece can be reconnected to the edges of the walls.

The device according to the invention is designed to measure a pressure of a medium and has at least one measuring cell for the medium to be measured with at least one inlet opening. The at least one inlet opening is preceded by at least one embodiment of the apparatus according to the invention for damping the change in the pressure of the medium, wherein the at least one inlet opening is connected to a measuring opening of the apparatus.

In this case, the device is designed in an embodiment for measuring a difference between a first pressure of a first medium and a second pressure of a second medium, wherein the at least one input opening of the at least apparatus for damping the change in the pressure of the at least one medium is connected upstream.

It is further possible for the device to have two inlet openings for at least one measuring cell, wherein a first inlet opening is preceded by a first apparatus for damping the change of the pressure of the first medium and a second inlet opening is followed by a second apparatus for damping the change of the pressure of the second medium ,

The presented apparatus is designed to damp flow effects when measuring a static pressure of the medium.

The presented device for measuring the pressure and / or the pressure difference is designed, for example, to measure the pressure difference or a location-dependent pressure difference of a medium, wherein for the medium at a first location, for example in a first device, a first pressure, For example, an overpressure, and at a second location, for example. In a second device, a second pressure, for example. A negative pressure prevails. The two devices, in which there are different pressures or different values of the pressure for the medium, can be used as vessels or containers and thus also spaces, electrical and / or mechanical devices or lines, for example, pipelines, for transporting therein Usually flowing medium.

The presented apparatus has at least one physical connection, for example two physical connections. In this case, it is possible to measure a first connection for measuring the pressure of the relevant medium, for example, and the other connection for measuring the pressure of the atmosphere and / or a comparison medium, for example as the second medium. By connecting the presented apparatus to two ports of the device for measuring the pressure and / or the pressure difference, it is possible to compensate for flow effects of at least one medium and / or a dynamic pressure of the at least one medium, which otherwise influence a measurement of the static pressure. Thus, in an embodiment, it is possible to distinguish between a static portion of a pressure and a dynamic portion of a pressure of dynamic origin using the apparatus presented. This is also possible if a pressure difference to be measured or a pressure difference to be measured between the two inlet openings or connections of the device or their ends should be very small. Using the presented apparatus flow effects that otherwise falsify the measurement can be compensated.

The apparatus proposed here or a corresponding device is designed to damp a flow-induced change in the pressure. This will u. a. characterized in that the medium, for example. Air, which flows against the apparatus and / or flows around, is forced through a labyrinth-like system, which is formed from the walls with the ventilation openings and the chambers or spaces of the apparatus for multiple deflection a kinetic kinetic energy and / or the flow of the medium slows down and / or attenuates that a proportion of the dynamic pressure in a total pressure is very small, in fact, only the static pressure of the medium with at least one device downstream of the device is measurable or measured. A number of concentrically and / or differently arranged tubes or profiles which form the walls of the apparatus, as well as a number of deflections for the medium to be measured by suitable air openings in the walls are chosen or optimized so that a desired Damping effect is achieved. With the optional damping material in the at least one chamber additional damping of the medium is possible.

It is also envisaged that the apparatus is protected against any environmental influences. This applies among other things to an effect of the medium to be measured or of another medium and / or the environment on the apparatus. It is envisaged that, for example, influences such as rain, lightning or a thermal attack, at least not affect a construction of the apparatus so that thereby a result of a measurement of the pressure could be falsified. It is intended, inter alia, to adapt a selection of the material for the apparatus according to an intended application. It is possible that at least one component of the usually several components, ie the walls and the end parts, usually at least one wall and / or at least one end part as a component of the apparatus of a metal, for example. An alloy of a plastic or a plastic compound or a compound based on silicone, for example. Glass, is formed. In this case, it is also possible that the at least one component of the apparatus is formed from a mixture of at least one metal, at least one plastic and / or at least one silicone-based compound, it being possible, for example, to coat metal with plastic. So it is, for example, at a Use in the explosion area possible to coat the shell, for example. The outermost wall, with plastic.

Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

• 1 zeigt eine Ausführungsform des erfindungsgemäßen Apparats in verschiedenen schematischen Schnittdarstellungen.
• 2 zeigt eine zweite und dritte Ausführungsform des erfindungsgemäßen Apparats in schematischen Schnittdarstellungen.
• 3 zeigt in schematischer Darstellung eine Ausführungsform der erfindungsgemäßen Vorrichtung, die die Ausführungsform des erfindungsgemäßen Apparats aus 1 umfasst.

The invention is illustrated schematically by means of exemplary embodiments in the drawings and will be described in detail below with reference to the drawings.

• 1 shows an embodiment of the apparatus according to the invention in various schematic sectional views.
• 2 shows a second and third embodiment of the apparatus according to the invention in schematic sectional views.
• 3 shows a schematic representation of an embodiment of the device according to the invention, which is the embodiment of the apparatus of the invention 1 includes.

The figures are described coherently and comprehensively. Same components are assigned the same reference numerals.

The basis of the 1a . 1b . 1c . 2a and 2 B featured embodiments of the apparatus according to the invention 2 . 40 . 42 here each have a central axis 4 on. Here is the first embodiment of the apparatus 2 in 1a in a schematic sectional view through this central axis 4 whereas the apparatus 2 in the 1b and 1c in a schematic sectional view perpendicular to the central axis 4 is shown. The second and third embodiments of the apparatus 40 . 42 is in the 2a and 2 B in section through the central axis 4 shown. The 3a to 3d also show the first embodiment of the apparatus 40 ,

In this case, the embodiments of the apparatus include 2 . 40 . 42 as components two end parts 6 . 8th , which are formed here as cylindrical flat disks, in which case a diameter of a respective end part 6 . 8th greater than a height of the respective end part 6 . 8th in the axial direction, here parallel to the central axis 4 , is. Here are the two final parts 6 . 8th arranged parallel to each other, the central axis 4 both final parts 6 . 8th vertical cuts.

In addition, the apparatuses include 2 . 40 . 42 as further components here in each case several, namely five cylindrical walls 10a . 10b . 10c . 10d . 10e , which are also referred to as cylinders or pipes and / or formed. There are all the walls 10a . 10b . 10c . 10d . 10e coaxial with the central axis 4 arranged. Every wall 10a . 10b . 10c . 10d . 10e here has an inner diameter and an outer diameter, wherein a thickness of a respective wall 10a . 10b . 10c . 10d . 10e is defined by a difference between the inner and outer diameters.

Here is in the middle of a central first wall 10a arranged. This is from a second wall 10b enclosed, whose inner diameter is greater than an outer diameter of the first wall 10a is. The second wall 10b is from a third wall 10c enclosed, whose inner diameter is greater than an outer diameter of the second wall 10b is. A fourth wall 10d encloses the third wall 10c , where the fourth wall 10d an inner diameter greater than the outer diameter of the third wall 10c is. A fifth and outermost wall 10e encloses the fourth wall 10d and has an inner diameter greater than the outer diameter of the fourth wall 10d is.

In addition, every wall shows 10a . 10b . 10c . 10d . 10e a first in 1a or 2a upper circular edge and a second, in 1a or 2a bottom circular edge up. Here is a first edge of each wall 10a . 10b . 10c . 10d . 10e with the first, in 1a or 2a upper end part 6 and a second circular edge of each wall 10a . 10b . 10c . 10d . 10e with the second, in 1a or 2a lower end part 8th usually gas-tight and possibly also releasably connected again.

By a connection or a corresponding attachment of a respective edge of a wall 10a . 10b . 10c . 10d . 10e with both final parts 6 . 8th it follows that the first innermost or central wall 10a and the two final parts 6 . 8th a first here cylindrical chamber 12a of the apparatus 2 enclose.

The first wall 10a , the second wall 10b and the two final parts 6 . 8th continue to enclose a second chamber 12b , which is formed here hollow cylindrical. The second wall 10b , the third wall 10c and the two final parts 6 . 8th continue to enclose or limit a third hollow cylindrical chamber 12c , The third wall 10c , the fourth wall 10d and the two final parts 6 . 8th enclose a fourth hollow cylindrical chamber 12d , Furthermore, enclose or limit the fourth wall 10d and the fifth outermost wall 10e as well as the two final parts 6 . 8th a fifth outermost hollow cylindrical chamber 12e ,

Such an apparatus 2 . 40 . 42 includes n + 1 walls 10a . 10b . 10c . 10d . 10e and also n + 1 rooms or chambers 12a . 12b . 12c . 12d . 12e , In the embodiment of the apparatus presented here 2 . 40 . 42 is n = 4. Regardless of a concrete number of walls 10a . 10b . 10c . 10d . 10e and chambers 12a . 12b . 12c . 12d . 12e is provided that the first innermost chamber 12a only from the first innermost wall 10a enclosed or limited by this. All other rooms 12b . 12c . 12d . 12e are from two immediately adjacent walls 10a . 10b . 10c . 10d . 10e enclosed and / or limited by these. The outermost or n + 1th, here fifth wall 10e encloses all other walls 10a . 10b . 10c . 10d as well as the chambers 12a . 12b . 12c . 12d . 12e and separates them from an environment 14 in which the apparatus 2 . 40 . 42 is arranged. At least two of the walls 10a . 10b . 10c . 10d . 10e have either the same wall thickness or production-related different wall thicknesses.

In addition, in the embodiments of the apparatus 2 . 40 . 42 provided that in the third chamber 12c and in the fourth chamber 12d in addition each damping material 44 . 46 arranged for the medium, for example. Is filled. Here is the third chamber 12c only partially with first damping material 44 filled. The fourth chamber 12d is complete with second damping material 46 filled.

As in particular from the 1b and 1c shows, all walls have 10a . 10b . 10c . 10d . 10e one or more ventilation openings each 16 on, with such vents 16 here with a respective wall 10a . 10b . 10c . 10d . 10e arranged regularly offset angular. There are also two air vents each 16 from two immediately adjacent walls 10a . 10b . 10c . 10d . 10e also arranged offset regularly relative to each other regularly.

It is further provided that in a center of the first end part 6 a measuring opening 18 is arranged, which is the first final part 6 completely penetrates. At this measuring opening 18 here is a connecting part 28 arranged, which is here tubular and encloses a channel, wherein the first end part 6 associated end of the connecting part 28 at the first final part 6 is attached gas-tight. One of the measuring opening 18 opposite end is connected to a measuring cell, not shown, within which a pressure of a medium is measurable or can be measured.

Possible currents are in the 1a . 1b and 1c each by a crowd 20a . 20b . 20c shown schematically at mutually parallel arrows.

If the apparatus 2 . 40 . 42 in his environment 14 exposed to such flows of the medium, it follows that the medium the vents 16 in the walls 10e . 10d . 10c . 10b . 10a flows through successively. In detail, the medium first flows through the ventilation openings 16 the outermost wall 10e and then ventilation holes 16 every other wall 10d . 10c . 10b and finally the innermost first wall 10a , what in 2 B through a labyrinthine curve 22 is indicated. It follows that the medium finally, after it also previously the outer chambers 12e . 12d . 12c . 12b and also the damping material 44 . 46 flowed through, in the innermost first chamber 12a flows. This results in an operation of the apparatus 2 . 40 . 42 that originally outside the apparatus 2 . 40 . 42 existing flow of the medium is attenuated or attenuated until it is the first innermost chamber 12a has reached.

It should be noted that there is a total pressure p (total, outside) in the environment 14 from a sum of the static pressure p (static) of the medium and a dynamic pressure p (dynamic), the dynamic pressure resulting from or due to the flow of the medium. $$\text{p}\left(\text{total}\text{, Outside}\right)=\text{p}\left(\text{static}\right)+\text{p}\left(\text{dynamic}\right)$$

As the medium, however, the apparatus 2 . 40 . 42 starting from the environment 14 through the vents 16 the walls 10e . 10d . 10c . 10b . 10a and the outer chambers 12e . 12d . 12c . 12b to the innermost first chamber 12a along the curve 22 traversing a labyrinth, it follows that a total internal pressure p (total, inside) in the first innermost chamber 12a ideally and / or largely corresponds only to the static pressure p (static), since the dynamic pressure p (dynamic) at least largely degraded and / or reduced, while the medium is the components of the apparatus 2 . 40 . 42 flows through.

Thus, it is possible that within the first innermost chamber 12a and / or at the measuring opening 18 only the static pressure p (static) and possibly a small, negligible proportion of the dynamic pressure p (dynamic) of the originally flowing medium can be measured.

The 1a . 1b . 1c . 2a and 2 B show that in all three embodiments of the apparatus 2 . 40 . 42 to the vents 16 the outermost fifth wall 10e director modules 24 . 25 are arranged for a liquid, which allow the liquid from the environment 14 not in the outermost chamber 12e and thus into the apparatus 2 . 40 . 42 enter, but from the apparatus 2 . 40 . 42 can escape into the environment. Here, in the first and second embodiments 2 . 40 of the apparatus the deflection modules 24 designed as curved and / or angled pipe pieces. In the third embodiment of the apparatus 42 ( 2 B) that's at the air vent 16 the outermost wall 10e arranged deflection module 25 formed as a pipe assembly with a first bent pipe section, a straight pipe section and another bent pipe section.

With regard to an arrangement or positioning of at least one deflection module 24 . 25 and a liquid opening 48 . 50 is still a mounting direction, eg. Installation position, the apparatus 2 . 40 . 42 in its intended operation with respect to gravity (arrow 52 ).

To show the 1a and 2a that the fluid opening 48 or a drainage opening in the first or second embodiment of the apparatus 2 . 40 in the second lower end part 8th is arranged, here taking into account the installation direction or installation position of the apparatus 2 considering gravity below the first upper end part 6 and below the walls 10a . 10b . 10c . 10d . 10e as well as the chambers 12a . 12b . 12c . 12d . 12e is arranged at a lowest point. It connects the liquid opening 48 in the second lower end part 8th the outermost chamber 12e with the environment 14 , Liquid, usually water, in the apparatus 2 . 40 can occur through the liquid opening 48 from the apparatus 2 . 40 be dissipated.

Further, considering the flows in the first and second embodiments of the apparatus 2 . 40 provided that a first opening of a respective deflection module 24 in the vents 16 empties. A second opening of the deflection module 24 leading to the environment 14 is open, taking into account gravity, whose direction is indicated by the arrow 52 is indicated, oriented downwards. Here, for the first embodiment of the apparatus 2 provided that the central axis 4 in the intended installation position parallel to the gravity and thus oriented vertically. In the second embodiment of the apparatus 40 is the axis 4 oriented in the intended installation position at an acute angle relative to gravity.

In contrast, for the third embodiment of the apparatus 42 in terms of its installation position provided that the axis 4 perpendicular to gravity and thus oriented horizontally. As 2 B shows is in the third embodiment of the apparatus 42 in the outermost wall 10e a liquid opening 50 arranged, this liquid opening 50 here the ventilation opening 16 in the outermost wall 10e opposite and with respect to the installation direction of the apparatus 42 considering gravity (arrow 52 ) is located at a lowest point.

Furthermore, for the second and third embodiments of the apparatus 40 . 42 provided that this apparatus 40 . 42 in an environment 14 is arranged, in which he is a liquid, eg. Water, exposed, which is in the 2a and 2 B through drops 54 is indicated, with the drops 54 fall from top to bottom by gravity. Due to the orientation of the deflection modules 24 on the outermost wall 10e the second embodiment of the apparatus 40 prevents the liquid falling from above through the outermost opening of a respective deflection module 24 into the apparatus 40 can penetrate. The same applies to the third embodiment of the apparatus 42 , It is provided that an outermost opening of the deflection module 25 also oriented downwards.

The embodiment of the apparatus according to the invention 2 is also in the 3a . 3b . 3c . 3d shown schematically, wherein it is provided that at least one embodiment of the apparatus 2 as part of a device according to the invention 56 . 58 . 60 . 62 designed to measure a pressure. It encompasses the device 56 . 58 . 60 . 62 next to the at least one device 2 with the connecting part 28 a measuring cell 30 which is enclosed by a housing. In this case, has or show the measuring cell 30 and / or the housing at least one input opening 34 on that over the connecting part 28 with the measuring opening 18 in the first final part 6 of the at least one apparatus 2 connected is.

Like the first embodiment of the device 56 in 3a shows, points the measuring cell 30 an entrance opening 34 on, with the entrance opening 34 the measuring cell 30 over a line 66 with the connecting part 28 of the apparatus 2 connected is. In the first embodiment of the device 56 is the apparatus 2 arranged outdoors. In contrast, in the second embodiment of the device 58 ( 3b) the apparatus 2 enclosed by a wall that forms a boundary of a container 68 , For example, a pipeline forms, in the or the apparatus 2 is arranged. It is with the apparatus 2 a flow of the medium within the container 68 attenuated. Furthermore, in the first and second embodiments of the device 56 . 58 provided that the measuring cell 30 here with only one each apparatus 2 is connected as part of an absolute pressure gauge is formed.

In the case of 3c presented third embodiment of the device 60 is the measuring cell 30 via a first entrance opening 34 with the apparatus 2 connected here also in a walled container 68 is arranged. In addition, the measuring cell here has another input opening 70 on that over another line 72 with the environment 14 connected is. Here is the measuring cell 30 the third embodiment of the device 60 formed as part of a differential pressure gauge, with which a difference of the pressure of the medium in the environment 14 and inside the container 68 is measured.

The measuring cell 30 the fourth embodiment of the device 62 is designed here as part of a differential pressure gauge and in 3d shown schematically. The measuring cell points 30 two entrance openings 34 on, over each a line 66 each with an embodiment of the apparatus 2 connected is. This is a first apparatus 2 here in a first container 68 which is enclosed by a first wall, and a second apparatus 2 in a second container 74 , which is enclosed by a second wall, arranged. With the device 62 It is possible to find a difference in pressure between the first container 68 and the second container 74 to eat.

With a respective embodiment of the device 56 . 58 . 60 . 62 is it possible of that by the environment 14 and / or at least one container 68 flowing medium in the measuring cell 30 merely to measure the static pressure p (static), since a flow of the medium and thus its dynamic pressure p (dynamic) through the at least one apparatus 2 is steamed before the medium from the innermost first chamber 12a of the respective apparatus 2 through the measuring opening 18 , the connecting part 28 and the entrance opening 34 into the measuring cell 30 entry.

LIST OF REFERENCE NUMBERS

2

apparatus

4

axis

6, 8

final part

10a, 10b, 10c, 10d, 10e

wall

12a, 12b, 12c, 12d, 12e

chamber

14

Surroundings

16

vent

18

measurement opening

20a, 20b, 20c

crowd

22

Curve

24, 25

rerouting

28

connecting part

30

cell

34

entrance opening

40.42

apparatus

44, 46

damping material

48, 50

liquid opening

52

arrow

54

drops

56, 58, 60, 62

contraption

66

management

68

container

70

entrance opening

72

management

74, 76, 78

container

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 3039144 C2 [0004]
• DE 102014009610 A1 [0005]

Cited non-patent literature

• DD 8527 [0003]

Claims (18)

Apparatus which is connectable to a measuring cell (30) for measuring a pressure of a flowing medium and adapted to damp a flow-induced change in the pressure of the medium, the apparatus (2, 40, 42) having n + 1 walls (10a, 10b, 10c, 10d, 10e), where n is an integer, has a first end portion (6) and a second end portion (8), each wall (10a, 10b, 10c, 10d, 10e) having a first edge and a second edge wherein all the first edges are connected to the first end part (6), all the second edges being connected to the second end part (8), a first central wall (10a) and first central parts of the two end parts (6, 8) defining a first central chamber (12a), wherein an n + 1th wall (10b, 10c, 10d) encloses in each case an nth wall (10a, 10b, 10c, 10d), wherein the nth wall (10a, 10b, 10c, 10d), the n + 1th wall (10b, 10c, 10d) and n + 1th sections of the two end parts (6, 8) is an n + 1 te chamber (12b, 12c, 12d, 12e) limit, wherein the n + 1-th chamber (12b, 12c, 12d, 12e), the n-th chamber (12a, 12b, 12c, 12d) encloses, each wall ( 10a, 10b, 10c, 10d, 10e) has at least one ventilation opening (16), one of the two end parts (6, 8) having in its first central section a measuring opening (18) for connecting the measuring cell (30). Apparatus after Claim 1 in which n is at least as large as 1. Apparatus after Claim 1 or 2 in which n is a number, for example 1, 2, 3, 4, 5, 6, 7, 8, 9 or greater than 9. Apparatus according to any one of the preceding claims, wherein a central axis (4) passes through said first central chamber (12a), said walls (10a, 10b, 10c, 10d, 10e) concentrically disposed about said common central axis (4) wherein the n + 1-th wall (10b, 10c, 10d, 10e) encloses the n-th wall (10a, 10b, 10c, 10d) in the axial direction, and wherein the n + 1-th chamber (12b, 12c, 12d, 12e) encloses the nth chamber (12a, 12b, 12c, 12d) in the axial direction. Apparatus after Claim 4 in which a plurality of ventilation openings (16) each of a wall (10a, 10b, 10c, 10d, 10e) are angularly offset relative to the central axis (4). Apparatus after Claim 4 or 5 in which at least two ventilation openings (16) are each arranged on a wall (10a, 10b, 10c, 10d, 10e) relative to the central axis (4) in a plane which is cut perpendicularly from the central axis (4). Apparatus according to one of the Claims 4 to 6 in which at least two ventilation openings (16) each of a wall (10a, 10b, 10c, 10d, 10e) are arranged offset axially relative to the central axis (4). Apparatus according to one of the Claims 4 to 7 in which the at least one ventilation opening (16) of the nth wall (10a, 10b, 10c, 10d) and the at least one ventilation opening (16) of the n + 1th wall (10b, 10c, 10d, 10e) are relative to the central axis (4) are arranged offset from one another angularly. Apparatus according to one of the Claims 4 to 8th in which the at least one ventilation opening (16) of the nth wall (10a, 10b, 10c, 10d) and the at least one ventilation opening (16) of the n + 1th wall (10b, 10c, 10d, 10e) are relative to the central axis (4) are arranged offset axially. Apparatus according to any one of the preceding claims, bounded by an outermost wall (10e) as part of a shell to an environment (14). Apparatus after Claim 10 which is further bounded by the two end parts (6, 8) as parts of the shell to the environment (14). Apparatus after Claim 10 or 11 in that at the at least one vent opening (16) of the outermost wall (10e) towards the environment (14) a deflection module (24, 25) is arranged, which is adapted to an entry of liquid from the environment (14) to prevent the apparatus (2, 40, 42). Apparatus according to one of the Claims 10 to 12 in which a direction of installation is provided with respect to gravity, with a fluid opening (48, 50) being arranged at a point of gravity of the shell which is arranged at the lowest point in terms of gravity, which allows fluid to escape from the apparatus (2, 40, 42). in the environment (14) allows. Apparatus according to one of the preceding claims, in which a connecting part (28) for connecting the measuring opening (18) to the measuring cell (30) is arranged at the measuring opening (18). Apparatus according to one of the preceding claims, wherein cushioning material (44, 46) for the medium is arranged in at least one chamber (12a, 12b, 12c, 12d, 12e). Apparatus for measuring a pressure of a medium comprising at least one measuring cell (30) for the medium to be measured with at least one inlet opening (34) and at least one apparatus (2, 40, 42) for damping the change in the pressure of the medium according to one of the preceding Claims, wherein the at least one Entrance opening (34) with a measuring port (18) of the at least one apparatus (2, 40, 42) is connected. Device after Claim 16 for measuring a difference between a first pressure of a first medium and a second pressure of a second medium, wherein the at least one input port (34) of the at least one measuring cell (30) of the at least one apparatus (2, 40, 42) for damping the change the pressure of the at least one medium is connected upstream. Device after Claim 17 , which has two inlet openings (34) for the at least one measuring cell (30), wherein a first inlet opening (34) has a first apparatus (2, 40, 42) for damping the change of the pressure of the first medium and a second inlet opening (34) a second apparatus (2, 40, 42) for damping the change in the pressure of the second medium is connected upstream.

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