DE102016125100A1 - Pressure reducing unit, preferably in a high pressure control valve - Google Patents

Abstract

A pressure reducing unit (20), preferably in a high-pressure control valve (10), which is inserted in a housing (11), has a base disk (31), a plurality of disks (32) stacked on one another and a cover disk (33) which forms a cage (30) through which a medium (12), namely a gas or a fluid, flows. The flow is limited by a plurality on the respective disc (31,32,33) raised formed contoured barriers (40) which are teardrop-shaped and thus streamlined. The drop-shaped barriers (40) are aligned and arranged on the disc (31, 32, 33) both in a plurality of concentric circles and a plurality of radially extending towards the center of the disc and thus form flow channels. The drop shape is dependent on the direction of flow of the medium (12) in the valve (10).

Description

The invention relates to a pressure reducing unit, preferably in a high-pressure control valve, which is inserted in a housing, comprising a base disk, a plurality of stacked disks and a cover plate, which form a cage through which a medium, namely a gas or a fluid flows, wherein the flow is limited by a plurality of raised on the respective disk formed contoured barriers.

It is known that high pressure flow control systems have control devices designed to cause a pressure drop in the passing medium, such as gas or fluid. For a given pressure drop across such a device, there is a corresponding increase in media speed that must be handled carefully. In addition, pressure drops that occur at high fluid flow rates in valves or the like are generally accompanied by other problems such as erosion, noise, vibration, and cavitation.

It is a common solution to the problems cited to divide the current through the device into a plurality of separate streams, each in the form of a tortuous path. For resulting losses caused by friction between the walls of the web, rapid changes in the direction of flow and expansion or contraction chambers, the medium pressure and the energy of the medium are partially dissipated along such paths.

In medium control valves, such control devices usually have a stack of discs. In this case, the medium web is defined by winding passages which are introduced into one or both opposing surfaces of adjacent disks.

From the US 7,089,961 B2 For example, a fluid energy reducing device is known that includes a fluid inlet and a fluid outlet that are separated by a plurality of stacked disks. Adjacent disks define a plurality of separate angularly spaced, radially extending fluid flow paths, trapping a flow path between two adjacent disks, wherein at least one of the webs is defined by a plurality of rows of discrete inter-spaced flow obstruction elements located between extend adjacent discs, divided into subordinate paths. The obstruction elements generally have a circular cross-section and are therefore substantially cylindrical, but the cross-section is tapered or enlarged.

In other solutions, such as from the GB-A-2335054 and US-A-5390896 As is known, the flow obstruction elements are also rectangular, square or geometrically combined in this way.

The disadvantage here is that the presence of such curvy tracks with barrier-like flow obstruction elements with sharp bends thus formed increases the tendency to clog and erosion caused by the presence of small particles such as dirt, sand, semolina and other debris in the Medium current is caused.

It is an object of the invention to provide a pressure reducing unit of the type mentioned, with a flow-optimized division and management of the medium takes place and reduces erosion and abrasion and unwanted deposits of dirt and the like can be prevented.

• - die Barrieren tropfenförmig und somit stromlinienförmig ausgebildet sind,
• - die tropfenförmigen Barrieren sowohl in einer Mehrzahl von konzentrisch verlaufenden Kreisen als auch einer Vielzahl von radial zur Scheibenmitte verlaufend auf der Scheibe ausgerichtet und angeordnet sind, und somit Strömungskanäle bilden, und
• - die Tropfenform abhängig von der Strömungsrichtung des Mediums im Ventil ist.

According to the invention the object is achieved in that

• the barriers are drop-shaped and thus streamlined,
• - The drop-shaped barriers are aligned and arranged in a plurality of concentric circles as well as a plurality of radially extending to the center of the disk on the disc, and thus form flow channels, and
• - The droplet shape is dependent on the flow direction of the medium in the valve.

According to a further embodiment of the invention, in the case of a flow of the medium from the outside to the inside of the valve, the tip of the teardrop shape points inwards, ie in the direction of the center of the disk. This applies to all droplet-shaped barriers formed on the respective disk.

Conversely, according to another embodiment of the invention, with a flow of the medium from the inside to the outside of the valve, the tip of the teardrop shape points outwards, ie away from the center of the disk. This also applies to all drop-shaped barriers formed on the respective disk.

It should be emphasized that both design variants are not combined in a valve, but the choice of the design variant of the flow direction of the medium in the valve is dependent.

By the solution according to the invention, the distribution and management of the medium in the valve flow optimized. In particular, the streamlined shape of the droplet-shaped barriers and their orientation on the respective disk promote the reduction of erosion and abrasion and, in addition, prevent deposits on the disks and in the valve due to the inevitably forming flow shadows, so that blockages are also avoided.

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

• 1 eine vertikale Schnittansicht eines Regelventils,
• 2 eine vergrößerte vertikale Schnittansicht einer Druckreduziereinheit im Ventil gemäß 1,
• 3 eine vergrößerte Perspektivansicht eines Käfigs der Druckreduziereinheit gemäß 2,
• 4 eine Scheibe und einen vergrößerten Ausschnitt einer solchen Scheibe des Käfigs der Druckreduziereinheit,
• 5 einen vergrößerten Ausschnitt einer Scheibe gemäß einer Ausführungsform mit der Strömungsrichtung von außen nach innen im Ventil gemäß 1, und
• 6 einen vergrößerten Ausschnitt einer Scheibe gemäß einer anderen Ausführungsform mit der Strömungsrichtung von innen nach außen im Ventil gemäß 1.

The idea underlying the invention will be described in more detail in the following description with reference to an embodiment which is illustrated in the drawings. Show it:

• 1 a vertical sectional view of a control valve,
• 2 an enlarged vertical sectional view of a pressure reduction unit in the valve according to 1 .
• 3 an enlarged perspective view of a cage of the pressure reduction unit according to 2 .
• 4 a disc and an enlarged section of such a disc of the pressure reduction unit cage,
• 5 an enlarged section of a disc according to an embodiment with the flow direction from outside to inside in the valve according to 1 , and
• 6 an enlarged section of a disc according to another embodiment with the flow direction from the inside out in the valve according to 1 ,

This in 1 shown control valve 10 has a housing 11 and serves to reduce the flow of a medium 12 like gas or fluid.

In the control valve 10 is a pressure reduction unit 20 according to 2 educated. This includes a socket 21 with a guide 22 , a seal 23 and a seat 24. Between the socket 21 and the seat 24 is a Ka 30 arranged.

The Ka 30 according to 3 is formed by a base disk 31 , several discs stacked on top of each other 32 and a cover disk 33 and put the Kä 30 through which the medium 12 flows.

The flow of the medium 12 is limited by the contoured barriers located on the respective disc 40 , as well as the bottom of the disc 31,32 and the bottom of the subsequent disc 32,33, like that 4 is apparent.

The barriers 40 are teardrop-shaped and thus streamlined. Furthermore, the drop-shaped barriers 40 both aligned and arranged in a plurality of concentric circles and a plurality of extending radially to the disk center on the respective disc 31,32,33 and thus form flow channels. According to 4 is the course or arrangement of the drop-shaped barriers 40 represented by the dash-dot-dashed lines. reference numeral 42 shows in the 4 the orientation of the drop-shaped barriers 40 ,

In addition, the teardrop shape is the barriers 40 from the flow direction of the medium 12 in the valve 10 dependent.

In the embodiment according to 5 with the flow direction from outside to inside of the medium 12 in the valve 10 (Arrows in 1 point in this case only from outside to inside) show the tips 41 the drop shapes of the barriers 40 inward, ie in the direction of the center of the disk.

In the embodiment according to 6 with the flow direction from inside to outside of the medium 12 in the valve 10 (Arrows in 1 point in this case only from inside to outside) show the tips of the drop shapes of the barriers 40 to the outside, ie away from the center of the disk.

The pressure reduction from P1 to P2, as in the 5 and 6 shown, takes place gradually after each concentric series 41 of barriers 40 as by the dash-dot-dash line 41 in 4 shown, on the one hand by flow friction on the surfaces of the through the barriers 40 formed flow channels, on the other hand by flow losses in a targeted collision 43 several flow paths.

List of reference numbers

10

High pressure control valve, valve

11

casing

12

medium

20

pressure reduction

21

Rifle

22

guide

23

poetry

24

Seat

30

Cage

31

base disc

32

slices

33

cover disc

40

barriers

41

barriers series

42

alignment

43

collision

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

• US 7089961 B2 [0005]
• GB 2335054 A [0006]
• US 5390896A [0006]

Claims (3)

Pressure reducing unit (20), preferably in a high-pressure control valve (10) which is inserted in a housing (11), comprising a base disk (31), a plurality of disks (32) stacked on one another and a cover disk (33) which forms a cage ( 30) through which a medium (12), namely a gas or a fluid, flows, wherein the flow is limited by a plurality of raised on the respective disc (31,32,33) formed contoured barriers (40), characterized in that - the barriers (40) are drop-shaped and thus streamlined, - the drop-shaped barriers (40) are aligned in a plurality of concentric circles as well as a plurality of radial to the center of the disk running on the disc (31,32,33) and are arranged, and thus form flow channels, and - the droplet shape is dependent on the flow direction of the medium (12) in the valve (10). Pressure reduction unit after Claim 1 , characterized in that at a flow of the medium (12) from outside to inside of the valve (10), the tip of the teardrop shape points inwards. Pressure reduction unit after Claim 1 , characterized in that at a flow of the medium (12) from the inside to the outside of the valve (10), the tip of the teardrop shape faces outward.

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