GB2286460A - Unit for testing mains water - Google Patents

Unit for testing mains water Download PDF

Info

Publication number
GB2286460A
GB2286460A GB9502447A GB9502447A GB2286460A GB 2286460 A GB2286460 A GB 2286460A GB 9502447 A GB9502447 A GB 9502447A GB 9502447 A GB9502447 A GB 9502447A GB 2286460 A GB2286460 A GB 2286460A
Authority
GB
United Kingdom
Prior art keywords
unit
body member
water
inlet nozzle
valve seat
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.)
Withdrawn
Application number
GB9502447A
Other versions
GB9502447D0 (en
Inventor
Roger Harold Creasey
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.)
CONFLOW Ltd
Original Assignee
CONFLOW 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 CONFLOW Ltd filed Critical CONFLOW Ltd
Publication of GB9502447D0 publication Critical patent/GB9502447D0/en
Publication of GB2286460A publication Critical patent/GB2286460A/en
Withdrawn legal-status Critical Current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
    • G01F1/20—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 detection of dynamic effects of the flow
    • G01F1/22—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 detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
    • G01F1/26—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 detection of dynamic effects of the flow by variable-area meters, e.g. rotameters of the valve type
    • 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
    • G01F1/20—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 detection of dynamic effects of the flow
    • G01F1/22—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 detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
    • G01F1/24—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 detection of dynamic effects of the flow by variable-area meters, e.g. rotameters with magnetic or electric coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/04—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges
    • G01L7/043—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges with mechanical transmitting or indicating means

Abstract

A unit for testing water mains comprises a tubular body member (1) into which the water to be tested is, in use, introduced; a water inlet nozzle (11) at one end of the body member; a water pressure tube (14) connected to transducer means to provide, externally of the body member (1), a display (19), (20) of the sensed water pressure; an internal, annular valve seat (22) and associated valve member (23) urged into a closed condition by spring means (24) and displaceable from the valve seat under the influence of the flow of water to be tested; a rod (25) co-axial with the body member (1) and attached to the valve member (23) and carrying a magnet (26), with displacement of the magnet activating transducer means to provide, externally of the body member, a display of the sensed water flow rate, and with a closable outlet (45) at the other end of the body member to the inlet nozzle (11). <IMAGE>

Description

UNIT FOR TESTING MAINS WATER This invention relates to a unit for testing mains water, typically by water engineers and fire service authorities, to appraise water supplies for fire fighting and/or development planning and/or as a means for investigating the ageing condition of water mains.
According to the present invention there is provided a unit for testing water mains comprising a tubular body member into which the water to be tested is, in use, introduced; a water inlet nozzle at one end of the body member; a water pressure tube connected to transducer means to provide, externally of the body member, a display of the sensed water pressure; an internal, annular valve seat and associated valve member urged into a closed condition by spring means and displaceable from the valve seat under the influence of the flow of water to be tested; a rod co-axial with the body member and attached to the valve member and carrying a magnet, with displacement of the magnet activating transducer means to provide, externally of the body member, a display of the sensed water flow rate, and with a closable outlet at the other end of the body member to the inlet nozzle.
The unit in accordance with the invention is typically attachable, via the inlet nozzle to a stand pipe, in turn connectec o the water mains to be tested.
The inlet nozzle is preferably removable e.g. by being a screw fitting, so that a range of inlet nozzles, having different forms of end connections, may be attached to the body member to meet the requirements of different countries. Thus, for U.R. stand pipes, the inlet nozzle would be a 2.1/2' instantaneous male coupling. It is preferred however, that the inlet nozzle houses a filter, and the removable nature of the inlet nozzle provides for access to the filter for cleaning purposes.
The transducer associated with the pressure tube preferably incorporates a pressure block and a bourdon tube, while the associated display means preferably incorporates a needle movable over a scale, typically providing for a read-out up to 22 Bar.
The transducer associated with the magnet carried by the rod preferably includes a rotary magnet attached to a spindle carried in bearings and carrying a needle movable over a scale, preferably providing for read-out of 0 - 50 litres/sec which would cover all the variations of mains flow likely to be encountered in the U.K., while the valve seat is of enlarged downstream diameter, so as to present a variable orifice.
A removable end cap is also preferably provided to close the outlet, preferably as a screw fitting to the body member whereby, when removed, a flow pressure reading is available at the water pressure display, and when attached, a static pressure reading is available at the water pressure display. The end cap is preferably provided with a screwadjustable plug co-axial with the body member.
For ease of manhandling the unit, a carrying handle is preferably provided on the body member. Also, the body member is preferably assembled from two co-axial parts with adjacent ends abutting. Conveniently, the two parts are secured together by the carrying handle bridging the parts and by screw means diametrically opposite the carrying handle.
A separate, two-part body member provides for access to the interior, and in particular the valve member and spring means. Preferably, the internal profile of the inlet part of the body member defines the variable orifice valve seat, while a slide and guide bush for the rod is carried within the outlet part of the body member by inwardly extending, radial arms, the spring means extending between a rear face of the valve member and the bush, preferably with an interposed sleeve at the bush, while the spring means preferably comprises a pair of coil compression springs of different coil diameters. Clearly, 'O'-ring water seals are required at strategic locations.
The invention will now be described in greater detail, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a side elevation of a unit for testing water mains, with its end cap removed; Figure 2 is a longitudinal sectional view through Figure 1; Figure 3 is a section on the line III-III of Figure 2; and Figure 4 details the water pressure display mechanism.
In the drawings, a unit for testing water mains comprises a tubular body member 1 into which the water to be tested is, in use, introduced as indicated by arrows A in Figure 2. The body member 1 comprises an inlet part 2 and a co-axial outlet part 3 butted together at 4 with a common connecting tube 5 and secured together by a carrying handle 6 bringing the inlet and outlet parts 2 and 3 and secured by screwed studs 7 (Figure 3) and by similar studs or screws on axis 8 of abutting lugs 9.
Towards its forward end, the inlet part 2 is provided with internal screw thread 10, onto which is screwed an inlet nozzle 11 having external screw threads 12 and housing a frusto-conical gauze filter 13.
A pressure tube 14 leads to transducer means comprising a pressure block 15 connected to a bourdon tube 16 terminating in a bourdon nipple 17 connected to a movement linkage 18. The latter is capable of rotating a pointer 19 over a scale 20 in a circular housing 21 to provide a pressure display externally of the body member 1.
Towards its rearward end, the inlet part 2 is provided with an internal, annular, variable orifice valve seat 22 and associated valve member 23 urged into a closed condition by spring means 24 and displaceable from the valve seat 22 under the influence of the flow of water to be tested. A rod 25 co-axial with the body member 1 and attached to the valve member 22 carries, internally, a magnet 26, whilst a slide and guide bush 27 for the end of the rod 25 remote from the valve member 23 is carried internally of the outlet part 3 by radial arms 28. A sleeve 29 lines the bush 27 and is slidably engaged by the rod 25. In addition, the spring means 24, comprising inner and outer coil compression springs 30 and 31, extends between the valve member 23 and the sleeve 29.
As can be seen in Figure 3, within a hollow interior 32 of one arm 28 is a transducer means influencable by the magnet 26 comprising a ring magnet assembly 33 attached to a spindle 34 rotatable in spaced-apart bearings 35 and carrying, at an end remote from the ring magnet assembly 33, a pointer 36 movable over a scale 37 in a rectangular housing 38 to provide a flow display externally of the body member 1.
At its rearward end, the outlet part 3 is provided with internal screw threads 39 into which is screwable a closure cap 40 having external screw threads 41 and also having, co-axial with the body 1 and with the rod 25, a plug 42 with a water seal 43, which plug 42 is axially advanceable and retractable by a manually operable, knurled knob 44 for permitting, or preventing, movement of the rod 25.
In use, with the inlet nozzle 2 attached to a stand pipe to be tested, then with the end cap 40 in place and with the plug 42 engaging the rod 25, a static, i.e. non-flow, water pressure reading can be obtained on the scale 20, when the valve in the stand pipe is opened to admit water to the unit in accordance with the invention. To obtain readings at the scales 20 and 37 for flow pressure and for rate of flow, then the end cap 40 needs to be unscrewed from the outlet part 3, before opening the stand pipe valve, so that water may freely issue from the then open outlet 45 of the outlet part 3.
The releasable inlet nozzle 11 ensures not only that the filter 13 may be readily inspected, cleaned or replaced, but also that a differently profiled inlet nozzle may be attached to the unit to suit different attachment standards in different countries. Furthermore, the two part construction of the body member 1 ensures that this can be readily split to gain access to the interior to inspect or replace the valve member, the springs, the valve seat etc.

Claims (17)

1. A unit for testing water mains comprising a tubular body member into which the water to be tested is, in use, introduced; a water inlet nozzle at one end of the body member; a water pressure tube connected to transducer means to provide, externally of the body member, a display of the sensed water pressure; an internal, annular valve seat and associated valve member urged into a closed condition by spring means and displaceable from the valve seat under the influence of the flow of water to be tested; a rod co-axial with the body member and attached to the valve member and carrying a magnet, with displacement of the magnet activating transducer means to provide, externally of the body member, a display of the sensed water flow rate, and with a closable outlet at the other end of the body member to the inlet nozzle.
2. A unit as claimed in Claim 1, wherein the inlet nozzle is removable.
3. A unit as claimed in Claim 2, wherein the inlet nozzle houses a filter.
4. A unit as claimed in any preceding Claim, wherein the transducer associated with the pressure tube incorporates a pressure block and a bourdon tube.
5. A unit as claimed in any preceding Claim, wherein the water pressure display incorporates a needle movable over a scale.
6. A unit as claimed in any preceding Claim, wherein the transducer associated with the magnet carried by the rod includes a rotary magnet attached to a spindle carried in bearings and carrying a needle movable over a scale.
7. A unit as claimed in any preceding Claim, wherein the valve seat is of enlarged downstream diameter.
8. A unit as claimed in any preceding Claim, wherein a removable end cap is provided to close the outlet.
9. A unit as claimed in Claim 8, wherein the end cap is provided with a screw-adjustable plug co-axial with the body member.
10. A unit as claimed in any preceding Claim, wherein a carrying handle is provided on the body member.
11. A unit as claimed in any preceding Claim, wherein the body member is assembled from two co-axial parts with adjacent ends abutting.
12. A unit as claimed in Claim 11, wherein the two parts are secured together by the carrying handle bridging the parts and by screw means diametrically opposite the carrying handle.
13. A unit as claimed in any preceding Claim, wherein the internal profile of the inlet part of the body member defines the variable orifice valve seat.
14. A unit as claimed in any preceding Claim, wherein a slide and guide bush for the rod is carried within the outlet part of the body member by inwardly extending, radial arms.
15. A unit as claimed in Claim 14, wherein the spring means extends between a rear face of the valve member and an interposed sleeve at the bush.
16. A unit as claimed in any preceding Claim, wherein the spring means comprises a pair of coil compression springs of different coil diameters.
17. A unit for testing water mains substantially as hereinbefore described with reference to the accompanying drawings.
GB9502447A 1994-02-09 1995-02-08 Unit for testing mains water Withdrawn GB2286460A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9402457A GB9402457D0 (en) 1994-02-09 1994-02-09 Unit for testing mains water

Publications (2)

Publication Number Publication Date
GB9502447D0 GB9502447D0 (en) 1995-03-29
GB2286460A true GB2286460A (en) 1995-08-16

Family

ID=10750095

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9402457A Pending GB9402457D0 (en) 1994-02-09 1994-02-09 Unit for testing mains water
GB9502447A Withdrawn GB2286460A (en) 1994-02-09 1995-02-08 Unit for testing mains water

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9402457A Pending GB9402457D0 (en) 1994-02-09 1994-02-09 Unit for testing mains water

Country Status (3)

Country Link
AU (1) AU1164395A (en)
GB (2) GB9402457D0 (en)
ZA (1) ZA951064B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060180A1 (en) * 1999-04-06 2000-10-12 Suez Lyonnaise Des Eaux Apparatus for measuring and recording pressure in a water distribution system
EP1116938A1 (en) * 2000-01-11 2001-07-18 Aqua S.r.l. Multifunctional filter for waterworks with pressure and flow rate sensors
WO2012151034A1 (en) * 2011-05-05 2012-11-08 Rosemount, Inc. Process fluid pressure transmitter with replaceable atmospheric vent filter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1540738A (en) * 1975-09-29 1979-02-14 Dresser Ind Temperature compensation for fluid filled pressure gauges
GB2030707A (en) * 1978-10-02 1980-04-10 British Gas Corp Central heating testing apparatus
US4333348A (en) * 1978-08-18 1982-06-08 Alexander Wiegand Gmbh U. Co. Liquid-filled pressure gauge
GB2123964A (en) * 1982-07-15 1984-02-08 Jct Controls Ltd Flowmeters
GB2161939A (en) * 1984-07-17 1986-01-22 Hayden Nilos Conflow Ltd Preventing rotation of longitudinally moving magnets in transducers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1540738A (en) * 1975-09-29 1979-02-14 Dresser Ind Temperature compensation for fluid filled pressure gauges
US4333348A (en) * 1978-08-18 1982-06-08 Alexander Wiegand Gmbh U. Co. Liquid-filled pressure gauge
GB2030707A (en) * 1978-10-02 1980-04-10 British Gas Corp Central heating testing apparatus
GB2123964A (en) * 1982-07-15 1984-02-08 Jct Controls Ltd Flowmeters
GB2161939A (en) * 1984-07-17 1986-01-22 Hayden Nilos Conflow Ltd Preventing rotation of longitudinally moving magnets in transducers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060180A1 (en) * 1999-04-06 2000-10-12 Suez Lyonnaise Des Eaux Apparatus for measuring and recording pressure in a water distribution system
FR2792070A1 (en) * 1999-04-06 2000-10-13 Suez Lyonnaise Des Eaux APPARATUS FOR MEASURING AND RECORDING THE PRESSURE OF A WATER DISTRIBUTION NETWORK
EP1116938A1 (en) * 2000-01-11 2001-07-18 Aqua S.r.l. Multifunctional filter for waterworks with pressure and flow rate sensors
WO2012151034A1 (en) * 2011-05-05 2012-11-08 Rosemount, Inc. Process fluid pressure transmitter with replaceable atmospheric vent filter
US8863580B2 (en) 2011-05-05 2014-10-21 Rosemount Inc. Process fluid pressure transmitter with replaceable atmospheric vent filter
RU2569903C2 (en) * 2011-05-05 2015-12-10 Роузмаунт Инк. Converter of process fluid medium pressure with replaceable filter of facility of communication with atmosphere
EP2705341B1 (en) * 2011-05-05 2017-09-06 Rosemount Inc. Process fluid pressure transmitter with replaceable atmospheric vent filter

Also Published As

Publication number Publication date
GB9402457D0 (en) 1994-03-30
AU1164395A (en) 1995-08-17
GB9502447D0 (en) 1995-03-29
ZA951064B (en) 1996-02-01

Similar Documents

Publication Publication Date Title
US5483838A (en) Fluid flow connector and gauge assembly
US3960016A (en) Water mixing valve with temperature indicator
US5834657A (en) Apparatus and methods for sensing fluid parameters
US2300319A (en) Apparatus for clearing clogged drains
US3256735A (en) Meter by-passing arrangement
US2285324A (en) Check valve operator
JP3302829B2 (en) Gas leak inspection plug
GB2286460A (en) Unit for testing mains water
US5417204A (en) Scuba air contamination detector
US4252021A (en) Fluid sampling device
US5538690A (en) Air quality indicator system for breathing air supplies
US4294276A (en) Water sensitive probe valve for use with a gas leak detector
US5412983A (en) Device for determining the flow velocity and flow direction of gases or liquids
CA2788410C (en) Measuring needle with non return valve function
US632808A (en) Pressure-regulator and connection.
US1110879A (en) Calipers.
US4671109A (en) Flow measuring device for liquids bearing entrained solids
US10729925B1 (en) Sprinkler flow test assembly
US1848691A (en) Valve structure
US3608735A (en) Spigot adapter connection for pressure hose
TW462927B (en) Method and sealing valve unit for controlling fluid flow through a passage
FR2757244A3 (en) Pressure control valve
FR2529672A1 (en) Pressure gauge for underwater diving.
EP0446547B1 (en) Pneumatic measuring device
US6520022B1 (en) Direct connect pressure tester arrangement

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)