GB2335054A - High energy loss flow control devices - Google Patents
High energy loss flow control devices Download PDFInfo
- Publication number
- GB2335054A GB2335054A GB9804538A GB9804538A GB2335054A GB 2335054 A GB2335054 A GB 2335054A GB 9804538 A GB9804538 A GB 9804538A GB 9804538 A GB9804538 A GB 9804538A GB 2335054 A GB2335054 A GB 2335054A
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- GB
- United Kingdom
- Prior art keywords
- plates
- apertures
- high energy
- radially
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
A high energy flow control device comprises a plurality of coaxial annular plates 30, 31, 32 joined together into rigid stack to define a series of energy loss paths for fluid flow. The plates comprise first, second and third plates. The first plates 32 are blanking plates to separate the energy loss paths defined between each adjacent pair of first plates from the energy loss paths between other adjacent pairs of first plates. There is at least one second plate 30 and at least one third plate 31 between each adjacent pair of first plates. The second and third plates each have a plurality of apertures 33 therein. The apertures in the second and third plates communicate with one another to define a series of fluid flow passageways extending from the inner circumference to the outer circumference of the plate. Each aperture in one of the second and third plates overlaps two circumferentially spaced apart apertures of the other of the second and third plates in order to permit interaction between adjacent fluid flow passageways.
Description
2335054 -I HIGH ENERGY LOSS FLOW CONTROL DEVICES This invention relates to
high energy flow control devices and is concerned more particularly, but not exclusively, with high energy pressure control valves for effecting energy dissipation in high energy flows of liquids and gases.
It is known to control high energy fluid flows, for example the gas output from a gas compressor, by passing the fluid through a high energy pressure control valve incorporating a stack of annular plates defining a series of generally radially extending tortuous passageways for the fluid which impart repeated changes of direction to the fluid and which thereby serve to dissipate a proportion of the fluid energy. It is also known for such a pressure control valve to be adjustable in dependence on the sensed pressure of the fluid external to the valve in order to vary the number of passageways available for fluid flow through the valve so as to control the pressure or flow of the fluid downstream of the valve within an acceptable range.
Such high energy pressure control valves are used to reduce the fluid pressure to manageable levels and to thereby avoid a number of problems which may otherwise be experienced in applications in which high energy fluid flows are present. Such problems include vibration and noise, erosion and cavitation which can lead to greatly reduced life of the component parts associated with the fluid flow, as well as leading to unpredictable fluid flow behaviour.
According to the present invention, there is provided a high energy flow control device comprising a plurality of coaxial annular plates joined together into a rigid stack to define a series of energy loss paths for fluid flow, the plates comprising first, second and third plates, the first plates being blanldng plates to separate the energy loss paths defined between each adjacent pair of first plates from the energy loss paths between other adjacent pairs of first plates, there being at least one second plate and at least one third plate between each adjacent pair of first plates, the second and third plates each having a plurality of apertures therein, the apertures in the second and third plates communicating with one another to define a series of fluid flow passageways extending from the inner circumference to the outer circumference of the plates, each aperture in one of the second and third plates overlapping two circumferentially spaced apart apertures of the other of the second and third plates in order to permit interaction between adjacent fluid flow passageways.
Preferably, each plate comprises a plurality of annular arrays of apertures, the apertures of each annular array being equi-angularly spaced from one another.
In one embodiment, the apertures are generally arcuately extending apertures and the apertures of each annular array are radially or substantially radially aligned with corresponding apertures of the other annular arrays of the same plate.
In this case, conveniently, the radially aligned series of apertures of each plate are separated from one another by radially extending spokes. Each radially extending spoke of one of the second and third plates is, preferably, arranged mid- way between two adjacent spokes of the other of the second and third plates. Each arcuately extending aperture may have a projection extending into it from the plate.
In another embodiment, each aperture comprises an arcuately extending portion and a radially extending portion, the radially extending portions extending radially inwardly on one of the second and third plates and radially outwardly on the other of the second and third plates, radially extending portions of one plate communicating with radially extending portions of the other plate. In this case, each aperture may comprise two radially spaced apart arcuate portions and a radially extending portion connecting the two arcuate portions together. Preferably, the radially extending portions communicate with the arcuate portions mid-way between the ends of the arcuate portions.
Preferably, a valve plug is axially adjustable within an inner space defined by the stack of annular plates in order to vary the number of passageways available for fluid flow between the inner space and the outer periphery of said stack.
The high energy flow control device may be a pressure control valve for controlling the pressure of a high energy flow of fluid by dissipation of fluid flow energy in dependence on the sensed pressure or flow externally of the valve.
In order that the invention may be more fully understood, a preferred high energy pressure control valve in accordance with the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is an axial section through the valve, Figure 2 is a schematic diagram showing a radial section through part of the trim stack of the valve, Figures 3 and 4 are plan views of two of the plates used in the trim stack shown in Figure 2, but in more accurate detail, Figure 5 shows the two plates of Figures 3 and 4 superimposed one on the other, Figures 6 and 7 are plan views of two alternative plates, Figure 8 shows the two plates of Figures 6 and 7 superimposed one on the other, Figures 9 and 10 are plan views of another two alternative plates, and Figure 11 shows the two plates of Figures 9 and 10 superimposed one on the other.
Referring to Figure 1, the control valve 10 shown therein comprises a valve housing 11 having a cover 12 and inlet and outlet ports 14 and 16 to which pipes are connectable for conducting the fluid flow to and from the valve 10. Although the ports 14 and 16 serve as inlet and outlet ports in the described arrangement, it should be appreciated that the valve 10 can be bidirectional and that the flow direction through the valve can be selected according to the fluid type and application. A trim -5 stack 18 is detachably mounted within the valve housing 11, and a valve plug 20 extends through a sealing member 22 and through a bore 23 in the cover 12 so that its end part 24 is accommodated within an inner space 25 within the trim stack 18.
The trim stack 18 is located so that the fluid flowing from the inlet port 14 to the outlet port 16 when the valve 10 is open must pass through the trim stack 18, and the valve plug 20 is movable axially as indicated by the arrows 26 in order to adjust the througliflow cross-section of the trim stack 18. Furthermore, the end part 24 of the valve plug 20 is engageable with a valve seat 28 when in the closed position shown in the figure, in order to close off the valve 10.
The trim stack 18 comprises a stack of annular plates consisting of apertured plates 30 and 31; one of each of which is shown in Figures 3 and 4, respectively, and blanking plates 32 which separate the energy loss paths defined between each adjacent pair of blanking plates 32 by plates 30 and 31 from the energy loss paths between other adjacent pairs of blanking plates 32. One of plates 30 and one of the plates 31 are interposed between each adjacent pair of blanking plates 32.
Each plate 30 and 31 has arcuately extending apertures 33 forined in a plurality of annular arrays spaced apart radially from one another, the apertures of each annular array being equi-angularly spaced from one another. The apertures 33 of each annular array are radially aligned with corresponding apertures 33 of the other annular arrays of the same plate. The plate 30 also has a plurality of arcuately extending entry slots 34, which communicate with the internal periphery of the trirn stack 18, and a plurality of arcuately extending exit slots 35 which communicate with j 11 1 the outer periphery of the trim stack 18. Each radially aligned series of apertures 33 of each plate 30, 31 is separated from adjacent radially aligned series of apertures by radially extending spokes 36.
Each arcuately extending aperture 33 has a small projection 37 extending into it from the plate. These projections 37 are located mid-way between the ends of the apertures 33.
As shown in Figures 2 and 5, the spokes 36 of one of the plates 30 and 31 are arranged midway between two adjacent spokes 36 of the other of the plates 31 and 30. Each aperture 33 in the plate 30 overlaps radially spaced apart apertures of the plate 31 and vice versa to define a series of substantially radially extending fluid flow passageways for fluid flow from the inner circumference to the outer circumference of the plates. Also, each aperture in one of the plates 30 and 31 overlaps two circumferentially spaced apart apertures 33 of the other plates 31 and in order to permit interaction between adjacent substantially radially extending fluid flow passageways. The interaction of fluid flowing along the radial passageways will provide both dissipation of energy where the flows meet and automatic pressure balancing of the flows about the complete circumference of the plates. The fluid flow will be subjected to repeated changes of direction by virtue of having to move repeatedly between an aperture in the plate 30 and an aperture in the plate 31 and this will serve to dissipate the energy of the flow.
The projections 37 are not essential but do help to provide further -7 deflections of the fluid flow to aid energy dissipation.
Each plate has a plurality of notches 38, typically three, equi-angularly spaced around the external circumference of the plate. These notches 38 can be aligned with corresponding notches in adjacent plates in order to provide angular registration between the plates 30, 31 and 32.
The trim stack 18 can be formed simply by assembling the plates 30, 31 and 32 relative to one another with the complete stack of plates being sandwiched between the valve seat 28 and an annular top plate 29 (see Figure 1). The complete trim stack 18 is then clamped in position by the cover 12 which may be engageable with the valve housing 11 by means of a screw threaded connection.
A known actuator may be provided for axially displacing the valve plug 20 in dependence on a control signal received from an instrument controller. The controller is arranged to vary the total through flow cross-section of the trim stack 18 which is available for fluid flow between the inlet port 14 and the outlet port 16 by way of the valve plug 20 in dependence on a control feedback signal ftom a transducer (not shown) arranged to sense the fluid pressure or flow downstream of the a-bn stack 18, in order to control the fluid pressure or flow downstream of the valve within an acceptable range.
Figures 6 and 7 show two alternative apertured plates 40 and 41 which can replace the apertured plates 30 and 31 of the preceding embodiment. The apertures -8 43 in the plates 40 and 41 are of generally T-shape having an arcuately extending portion 43a and a radially extending portion 43b. The arcuately extending portions of the apertures of each annual array slightly overlap (as viewed in a radial direction) two adjacent apertures of an adjoining annular array. Also, each arcuately extending portion is slightly longer than the angular distance by which two adjacent arcuately extending portions of each annular array are spaced apart.
The radially extending portions of the plates 40 extend radially inwardly from the arcuately extending portions and the radially extending portions of the plates 41 extend radially outwardly from the arcuately extending portions. The radially inwardly extending portions of the innermost array of apertures in the plate 40 communicate with the inner periphery of the trim stack and the radially outwardly extending portions of the outermost array of apertures in the plate 41 communicate with the outer periphery of the trim stack.
is Although not shown, notches, similar to notches 38, will be provided in the plates 40 and 41 so as to provide angular registration between the plates.
When the plates 40 and 41 are stacked one on top of the other (as shown in Figure 8) between two blanking plates, the arcuately extending portion 43a of each aperture 43 in one of the plates 40,41 spans the distance between the arcuately extending portions 43a of two apertures in the other plate 41,40 and communicates with the arcuately extending portions of the these two apertures. The radially extending portions 43b of the apertures 43 of one plate 40,41 will communicate with -9the radially extending portions 43b of the apertures 43 in an adjoining annular array of apertures 43 in the other plate 41,40. This will provide tortuous fluid flow paths between the inner and outer peripheries of the trim stack 18.
In particular, in use, pressurised fluid enters the radially inwardly extending portions 43b of the innermost annular array of apertures 43 in the plate 40. The fluid flow strikes the outer wall of the arcuately extending portions 43a. and divides into two, part of the flow moving along the arcuate portion in one direction and part of the flow moving along the arcuate portion in an opposite direction. The fluid flow then strikes the two end walls of the arcuate portion 43a and moves vertically into the arcuately extending portions 43a of two adj"ou'ung apertures 43 of the innermost annular array of apertures in the plate 41. The fluid flow passes along these arcuate portions 43a where it interacts with fluid entering these arcuate portions from other apertures in the plate 40. The flow then passes through the radially outwardly extending portions 43b of the apertures 43 in the plate 41. It then strikes the end wall of these radially outwardly extending portions and moves vertically into overlapping inwardly radiaIly extending portions of the second annular array of apertures in the plate 40. The flow then continues through the plates 40 and 41 in similar fashion until it exits from the radially outwardly extending portions 43b of the outermost annular array of apertures in the plate 41.
Figures 7 and 8 show another two alternative plates 50 and 51. The apertures 53 in the plates 50 and 51 have two radially spaced apart, arcuate portions 53a and 53b and a radially extending portion 53c connecting the two arcuate portions -10together. The radially extending portions 53c communicate with the arcuate portions 53a and 53b mid-way between the ends of the arcuate portions. The arcuately extending portions 53a and 53b of the apertures of each annular array slightly overlap (as viewed in a radial direction) the corresponding portions 53a and 53b of an adjoining annular array. Also, each arcuately extending portion 53a, 53b is slightly longer than the angular distance by which the corresponding arcuately extending portions of two adjacent apertures in the same annular array are spaced apart.
The radially extending portions 53c of the plates 50 and 51 extend in both directions beyond the arcuately extending portions 53a and 53b and radially beyond an adjacent end of the radially extending portions 53c of an adjoining annular array of apertures. The inner ends of the radially extending portions 53c of the apertures 53 of the innermost annular array of both plates 50 and 51 communicate with the inner periphery of the trim stack and the outer ends of the radially extending portions 53C of the apertures 53 of the outermost annular array of both plates 50 and 51 communicate with the outer periphery of the trim stack.
Although not shown, notches, similar to notches 38, will be provided in the plates 50 and 51 so as to provide angular registration between the plates.
The plates 50 and 5 1 are in fact identical to one another apart from the position of the notches (not shown) but are shown separately in Figures 7 and 8, respectively, to indicate their relative angular positions when arranged in the trim stack.
-11 When the plates 50 and 51 are stacked one on top of the other (as shown in Figure 11) between two blanking plates, radially extending portions 53c of the apertures of one plate will communicate with the radially extending portions 53c of the apertures in an adjoining annular array of apertures 53 in the other plate to provide substantially radially extending fluid flow paths between the inner and outer peripheries of the trim stack 18. Also, the arcuately extending portions 53a and 53b of each apertures 53 in one of the plates 50, 51 spans the distance between the arcuately extending portions 53a and 53b respectively of two apertures in the other plate 51, 50 and so as to communicate with the arcuately extending portions of these apertures in order to permit interaction between adjacent fluid flow passageways.
As shown in Figures 3 and 4, Figures 6 and 7, and Figures 9 and 10 the apertures increase in size from the innermost array of apertures to the outermost array of apertures and are designed for fluid flow from the inner periphery of the trim stack to the outer periphery of the trim stack.
In some circumstances, it may be desirable to provide a control valve for fluid flow in the reverse direction, namely from the outer periphery of the trim stack to the inner periphery of the trim stack. In this case, the apertures should increase in size from the outermost array of apertures to the innermost array of apertures.
This can be achieved by increasing the radial dimensions of the apertures of the inner arrays in much the same way as is shown schematically in Figure 2.
The embodiments described above are given by way of example only and -12various modifications will be apparent to persons skilled in the art without departing from the scope of the invention defined by the appended claims.
Claims (12)
1. A high energy flow control device comprising a plurality of coaxial annular plates joined together into a rigid stack to define a series of energy loss paths for fluid flow, the plates comprising first, second and third plates, the first plates being blanking plates to separate the energy loss paths defined between each adjacent pair of first plates from the energy loss paths between other adjacent pairs of first plates, there being at least one second plate and at least one third plate between each adjacent pair of first plates, the second and third plates each having a plurality of apertures therein, the apertures in the second and third plates communicating with one another to define a series of fluid flow passageways extending from the inner circumference to the outer circumference of the plates, each aperture in one of the second and third plates overlapping two circumferentially spaced apart apertures of the other of the second and third plates in order to permit interaction between adjacent fluid flow passageways.
2. A high energy flow control device as claimed in Claim 1, wherein each plate comprises a plurality of annular arrays of apertures, the apertures of each annular array being equi-angularly spaced from one another.
3. A high energy flow control device as claimed in Claim 2, wherein the apertures are generally arcuately extending apertures and the apertures of each annular array are radially or substantially radially aligned with corresponding apertures of the other annular arrays of the same plate.
-14
4. A high energy flow control device as claimed in Claim 3, wherein the radially aligned series of apertures of each plate are separated from one another by radially extending spokes.
5. A high energy flow control device as claimed in Claim 4, wherein each radially extending spoke of one of the second and third plates is arranged midway between two adjacent spokes of the other of the second and third plates.
6. A high energy flow control device as claimed in any one of claims 3 to 5, 10 wherein each arcuately extending aperture has a projection extending into it from the plate.
7. A high energy flow control device as claimed in Claim 1 or Claim 2, wherein each aperture comprises an arcuately extending portion and a radially 15 extending portion, the radially extending portions extending radially inwardly on one of the second and third plates and radially outwardly on the other of the second and third plates, radially extending portions of one plate communicating with radially extending portions of the other plate.
8. A high energy flow control device as claimed in Claim 7, wherein each aperture comprises two radially spaced apart arcuate portions and a radially extending portion connecting the two arcuate portions together.
9. A high energy flow control device as claimed in Claim 7 or Claim 8, -15 wherein the radially extending portions communicate with the arcuate portions midway between the ends of the arcuate portions.
10. A high energy flow control device as claimed in any one of the preceding 5 claims, wherein a valve plug is axially adjustable within an inner space defined by the stack of annular plates in order to vary the number of passageways available for fluid flow between the inner space and the outer periphery of said stack.
11. A high energy flow control device as claimed in any one of the preceding 10 claims, which is a pressure control valve for controlling the pressure of a high energy flow of fluid by dissipation of fluid flow energy in dependence on the sensed pressure or flow externally of the valve.
12. A high energy flow control device substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9804538A GB2335054B (en) | 1998-03-05 | 1998-03-05 | High energy loss flow control devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9804538A GB2335054B (en) | 1998-03-05 | 1998-03-05 | High energy loss flow control devices |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9804538D0 GB9804538D0 (en) | 1998-04-29 |
| GB2335054A true GB2335054A (en) | 1999-09-08 |
| GB2335054B GB2335054B (en) | 2002-03-13 |
Family
ID=10827930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9804538A Expired - Lifetime GB2335054B (en) | 1998-03-05 | 1998-03-05 | High energy loss flow control devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2335054B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001069114A1 (en) | 2000-03-16 | 2001-09-20 | Hopkinsons Limited | Fluid energy reduction device |
| JP2005090555A (en) * | 2003-09-12 | 2005-04-07 | Tokyo Kousou Kk | Pressure reducing control valve |
| CN102937188A (en) * | 2012-11-10 | 2013-02-20 | 无锡智能自控工程股份有限公司 | Array flow velocity control valve structure suitable for incompressible fluid |
| GB2516044A (en) * | 2013-07-09 | 2015-01-14 | Sev Glocon Ltd | Valve |
| GB2549155A (en) * | 2016-03-31 | 2017-10-11 | Weir Valves & Controls Uk Ltd | Trim for a control valve |
| DE102016125100A1 (en) | 2016-12-21 | 2018-06-21 | Schuf Armaturen Und Apparatebau Gmbh | Pressure reducing unit, preferably in a high pressure control valve |
| EP3798485A1 (en) | 2019-09-27 | 2021-03-31 | Severn Glocon Limited | Flow control device |
| GB2587615A (en) * | 2019-09-27 | 2021-04-07 | Severn Glocon Ltd | Flow control device |
| KR102493448B1 (en) * | 2022-09-30 | 2023-01-30 | 브이아이브이인터내셔날 주식회사 | Fluid pressure reducing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1268073A (en) * | 1968-05-06 | 1972-03-22 | Richard Ernst Self | Improvements in or relating to energy loss fluid controls |
-
1998
- 1998-03-05 GB GB9804538A patent/GB2335054B/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1268073A (en) * | 1968-05-06 | 1972-03-22 | Richard Ernst Self | Improvements in or relating to energy loss fluid controls |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001069114A1 (en) | 2000-03-16 | 2001-09-20 | Hopkinsons Limited | Fluid energy reduction device |
| JP2005090555A (en) * | 2003-09-12 | 2005-04-07 | Tokyo Kousou Kk | Pressure reducing control valve |
| CN102937188A (en) * | 2012-11-10 | 2013-02-20 | 无锡智能自控工程股份有限公司 | Array flow velocity control valve structure suitable for incompressible fluid |
| GB2516044A (en) * | 2013-07-09 | 2015-01-14 | Sev Glocon Ltd | Valve |
| GB2516044B (en) * | 2013-07-09 | 2020-05-06 | Severn Glocon Ltd | Valve |
| GB2549155B (en) * | 2016-03-31 | 2018-09-26 | Weir Valves & Controls Uk Ltd | Trim for a control valve |
| GB2549155A (en) * | 2016-03-31 | 2017-10-11 | Weir Valves & Controls Uk Ltd | Trim for a control valve |
| DE102016125100A1 (en) | 2016-12-21 | 2018-06-21 | Schuf Armaturen Und Apparatebau Gmbh | Pressure reducing unit, preferably in a high pressure control valve |
| EP3798485A1 (en) | 2019-09-27 | 2021-03-31 | Severn Glocon Limited | Flow control device |
| GB2587615A (en) * | 2019-09-27 | 2021-04-07 | Severn Glocon Ltd | Flow control device |
| US11519523B2 (en) | 2019-09-27 | 2022-12-06 | Severn Glocon Limited | Flow control device |
| GB2587615B (en) * | 2019-09-27 | 2023-06-14 | Severn Glocon Uk Valves Ltd | Flow control device |
| KR102493448B1 (en) * | 2022-09-30 | 2023-01-30 | 브이아이브이인터내셔날 주식회사 | Fluid pressure reducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2335054B (en) | 2002-03-13 |
| GB9804538D0 (en) | 1998-04-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20180304 |