GB2247532A - A device for measuring and regulating fluid flow therethrough - Google Patents

A device for measuring and regulating fluid flow therethrough Download PDF

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Publication number
GB2247532A
GB2247532A GB9015700A GB9015700A GB2247532A GB 2247532 A GB2247532 A GB 2247532A GB 9015700 A GB9015700 A GB 9015700A GB 9015700 A GB9015700 A GB 9015700A GB 2247532 A GB2247532 A GB 2247532A
Authority
GB
United Kingdom
Prior art keywords
valve
orifice
fluid flow
measuring
butterfly valve
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
Application number
GB9015700A
Other versions
GB2247532B (en
GB9015700D0 (en
Inventor
Alan David Hall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Ormskirk Ltd
Original Assignee
Hattersley Newman Hender Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hattersley Newman Hender Ltd filed Critical Hattersley Newman Hender Ltd
Priority to GB9015700A priority Critical patent/GB2247532B/en
Publication of GB9015700D0 publication Critical patent/GB9015700D0/en
Publication of GB2247532A publication Critical patent/GB2247532A/en
Application granted granted Critical
Publication of GB2247532B publication Critical patent/GB2247532B/en
Priority to HK98105540A priority patent/HK1006590A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40—Details of construction of the flow constriction devices
    • G01F1/42—Orifices or nozzles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Measuring Volume Flow (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

A device for measuring and regulating fluid flow therethrough comprises a butterfly valve 12 connected to an orifice plate 19 via a spool piece 16. The orifice plate 19 is disposed at a distance from the valve at least equal to the nominal diameter of the valve. The orifice plate is integrally formed with a flange located at the upstream end of the spool piece 16 and the flange incorporates tappings 24, for a differential pressure measurement device. This provides a compact arrangement which enables flowrate to be accurately determined from the pro-determined characteristic of the orifice plate 19. <IMAGE>

Description

A DEVICE FOR MEASURING AND REGULATING FLUID FLOW THERETHROUGH This invention relates to a device for measuring and regulating fluid flow therethrough and more specifically to a commissioning set.
Conventionally the flow of hot and chilled water passing through heating and air conditioning systems respectively is balanced to ensure that the correct proportion of water is being supplied to the terminal units of these systems.
Any imbalance results in reduced performance of these systems as water tends to flow in the path of least resistance unless inequalities in resistances at each division of flow are reduced to a minimum.
One known solution to this problem comprises an orifice plate connected to the inlet of an oblique pattern globe valve, the advantage of this close-coupled arrangement being that flow rate measurement, regulation and when necessary isolation can be carried out at one position. However, this known device is less compact.
The present invention has been made from a consideration of this problem.
According to the present invention there is provided apparatus for measuring and regulating fluid flow therethrough comprising an orifice member defining an orifice, means for measuring fluid flow through said orifice, a butterfly valve, and a connecting member, said connecting member extending between said butterfly valve and said orifice member, the distance between the orifice member and the butterfly valve being no less than the nominal diameter of the valve.
The orifice member preferably comprises an orifice plate and the means for measuring fluid flow may comprise corner tappings for use in differential pressure- measurement.
The connecting member may comprise a spool piece.
The butterfly valve is necessarily located downstream of the spool piece.
The orifice plate may be conventionally integrally located within the upstream flange with the corresponding corner tappings for use in differential pressure measurement passing radially through that flange. The flange may be increased in thickness locally to accept the pressure tappings connection.
The butterfly valve may be fitted with a double regulatin feature as described in British Patent Application No.
9,007,960.9/filed on 7th April 1990, which enables the flow to be regulated, when at the required position a stop can be locked in position such that the valve can be closed but accurately re-opened to the previously defined correct position. The valve cannot be opened beyond this position unless the stop is unlocked.
The invention will now be further described by way of example only with reference to the accompanying drawings, in which: Figure 1 shows a side elevation of a device for measuring and regulating fluid flow therethrough, Figure 2 shows a plan view of the device in Figure 1, Figure 3 shows a front sectional view of the device of Figure 1 and 2.
Referring to the drawings a commissioning set 10 comprises a butterfly valve 12 connected to an orifice plate 19 via a spool piece 16. The butterfly valve 12 is gear operated and is substantially the same as that described in British Patent Application No. 9,007,960.9
The spool piece 16 comprises a pipe 18 with a flange 20, 22 being provided at either end thereof. The orifice plate 19 is integrally located with the upstream flange 20.
The corner tappings 24, 26 for differential pressure measurement pass radially through the upstream flange 20, the upstream flange 20 being increased in thickness locally to accept the pressure tapping connections.
One advantage of this close-coupled arrangement is that the device of the present invention is more compact than known devices of this kind. Also the butterfly valve of the present invention provides greater speed of setting because of its quarter turn operation than the known oblique valve conventionally used in commissioning sets.
It is noted that the butterfly valve cannot be connected directly to the orifice plate as the accuracy of flow rate measurement is compromised and fouling of the orifice plate by the butterfly valve disk occurs. It has been found that the minimum distance at which the orifice plate can be located upstream of the valve without affecting flow rate accuracy is equal to the nominal diameter of the valve.
In use, with this commissioning set installed in the pipe line with a minimum of five diameters of straight pipe upstream, the commissioning set can be used for flow rate measurement and regulation until the desired flow rate is achieved. Flow rate is measured by means of the connection of a differential pressure measurement device such as a manometer to the tappings 24, 26. The flow rate can be determined from the pre-determined characteristic of the orifice plate 19.
It is to be understood that the above described embodiment has been described by way of example only and that many modifications and variations are possible.

Claims (10)

1. Apparatus for measuring and regulating fluid flow there through comprising an orifice member defining an orifice, means for measuring fluid flow through said orifice, a butterfly valve, and a connecting member, said connecting member extending between said butterfly valve and said orifice member, the distance between said orifice member and the butterfly valve being no less than the nominal diameter of the valve.
2. Apparatus as claimed in claim 1, in which the orifice member comprises an orifice plate.
3. Apparatus as claimed in claim 1 or 2, in which the means for measuring fluid flow comprises corner tappings for use in differential pressure measurement.
4. Apparatus as claimed in claim 1, 2 or 3, in which the connecting member comprises a spool piece.
5. Apparatus as claimed in claim 4, in which the butterfly valve is disposed downstream of the spool piece.
6. Apparatus as claimed in claim 3 or 4, in which the orifice member is integrally formed with an upstream flange of the connecting member.
7. Apparatus as claimed in claim 6, when appendant to claim 3, in which the upstream flange is increased in thickness locally to accept the corner tappings.
8. Apparatus as claimed in any preceding claim, in which the valve is fitted with a double regulating feature which enables flow through the valve to be regulated.
9. Apparatus as claimed in claim 8, in which the double regulating feature comprises a stop which can be adjusted and locked in any adjusted position such that the valve can be closed but acurately reopened to the previously adjusted position.
10. Apparatus for measuring and regulating fluid flow therethrough substantially as hereinbefore described with reference to the acompanying drawings.
GB9015700A 1990-07-17 1990-07-17 A device for measuring and regulating fluid flow therethrough Expired - Lifetime GB2247532B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9015700A GB2247532B (en) 1990-07-17 1990-07-17 A device for measuring and regulating fluid flow therethrough
HK98105540A HK1006590A1 (en) 1990-07-17 1998-06-17 A device for measuring and regulating fluid flow therethrough

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9015700A GB2247532B (en) 1990-07-17 1990-07-17 A device for measuring and regulating fluid flow therethrough
HK98105540A HK1006590A1 (en) 1990-07-17 1998-06-17 A device for measuring and regulating fluid flow therethrough

Publications (3)

Publication Number Publication Date
GB9015700D0 GB9015700D0 (en) 1990-09-05
GB2247532A true GB2247532A (en) 1992-03-04
GB2247532B GB2247532B (en) 1994-01-05

Family

ID=26297338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9015700A Expired - Lifetime GB2247532B (en) 1990-07-17 1990-07-17 A device for measuring and regulating fluid flow therethrough

Country Status (2)

Country Link
GB (1) GB2247532B (en)
HK (1) HK1006590A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400819A (en) * 1990-07-09 1995-03-28 Keystone International Holdings Corp. Measuring and regulating valve
CN104457860A (en) * 2014-11-18 2015-03-25 东方电气集团东方汽轮机有限公司 Method for measuring hole flow or clearance flow of rotating component of turbine motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400819A (en) * 1990-07-09 1995-03-28 Keystone International Holdings Corp. Measuring and regulating valve
CN104457860A (en) * 2014-11-18 2015-03-25 东方电气集团东方汽轮机有限公司 Method for measuring hole flow or clearance flow of rotating component of turbine motor
CN104457860B (en) * 2014-11-18 2017-12-29 东方电气集团东方汽轮机有限公司 The measuring method in hole or clearance flow to turbine rotary part

Also Published As

Publication number Publication date
GB2247532B (en) 1994-01-05
HK1006590A1 (en) 1999-03-05
GB9015700D0 (en) 1990-09-05

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20100716