EP0711959A1 - Méthode et dispositif pour la distribution de liquide - Google Patents

Méthode et dispositif pour la distribution de liquide Download PDF

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Publication number
EP0711959A1
EP0711959A1 EP94308312A EP94308312A EP0711959A1 EP 0711959 A1 EP0711959 A1 EP 0711959A1 EP 94308312 A EP94308312 A EP 94308312A EP 94308312 A EP94308312 A EP 94308312A EP 0711959 A1 EP0711959 A1 EP 0711959A1
Authority
EP
European Patent Office
Prior art keywords
connector
pipe
liquid
valve
reservoir
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Withdrawn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
EP94308312A
Other languages
German (de)
English (en)
Inventor
John Ross Lane
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.)
Suez WTS USA Inc
Original Assignee
WR Grace and Co Conn
WR Grace and Co
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 WR Grace and Co Conn, WR Grace and Co filed Critical WR Grace and Co Conn
Priority to EP94308312A priority Critical patent/EP0711959A1/fr
Publication of EP0711959A1 publication Critical patent/EP0711959A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0092—Devices for preventing or removing corrosion, slime or scale

Definitions

  • the present invention relates to an apparatus and method for dispensing liquid, such as a corrosion inhibitor, to a pipework system, which contains a pressurised liquid.
  • a pipework system which contains a pressurised liquid.
  • a system is a central heating system, in which a heat carrier liquid is present.
  • the radiator can once again be isolated from the rest of the central heating system, the adapter can be disconnected and the air bleed screw replaced and tightened, and then the two radiator valves can be opened to allow the system pump to run for a required period of time necessary to distribute the corrosion inhibitor throughout the whole central heating system. Throughout this corrosion inhibiting operation the pump of the central heating system can be in continuous operation so that only the one radiator is interfered with.
  • existing pipework systems such as central heating systems either have no air bleed vent pins or plugs (screws), or they may have such features in locations which may be inaccessible without great difficulty.
  • one aspect of the present invention provides a method of introducing a liquid to a pipework system comprising attaching a retro-fit connector to a portion of pipe of said system, drilling through the connector into the pipe to provide communication with the interior of the pipe, attaching a pressurizable reservoir of liquid to said Tee connector, and dispensing said liquid under pressure from the reservoir into the pipe.
  • a second aspect of the present invention provides apparatus for dispensing liquid to a pipework system, comprising a pressurizable dispenser reservoir, a retro-fit connector for attachment to a section of pipe of said system, a shut-off valve to isolate the interior of said pipe section from the exterior of the connector, and a flow line between said pressurizable reservoir and said connector for conveying pressurized liquid into the pipe section through said connector.
  • the apparatus 1 includes a pressurizable bottle 3 of rigid plastic, preferably transparent, material and equipped with a reciprocating pressurizing pump 5 operated manually by a handle 7 atop the bottle. Liquid contained within the bottle 3 can be pumped from the bottle along a flexible flow line 9 dipping at 11 into the bottle near its floor, and connected in a leak-tight manner to the sidewall of the bottle by means of an adapter 13.
  • the bottle is further equipped with a pressure release valve 15 which may combine the functions of a pressure relief valve and a manually operated pressure release valve.
  • the apparatus 1-15 constituting the dispenser 1 is similar to a conventional commercially available dispenser for horticultural insecticide or fungicide compositions.
  • a retro-fit Tee fitting generally referenced 17, and in particular by way of an adapter in the form of a cap nut 19 having an integral tubular inlet stem 21 on which the end of the flow line 9 can be attached by means of a compression ring 23 and a nut 25.
  • the clamp nut 25 in order to permit the cap nut 19 to be fastened to the rest of the retro-fit Tee connector 17, it is preferable for the clamp nut 25 to be only loosely tightened down while the cap nut 19 is screwed on to the body of the Tee connector, and then subsequently the clamp nut 25 can be tightened when the rest of the screw connections have been made.
  • slots 31 have semi-circular ends 35 which snugly engage the exterior of the pipe 29 when the body 27 of the Tee connector 17 is slipped over the pipe 29.
  • a saddle member 37 shown in Figure 2 will have been removed from the body 27, although in Figure 1 the saddle 37 is shown in place.
  • the saddle 37 can be inserted into the externally threaded end of the body 27 where the slots 31 are formed, so that a cylindrical cutout 39 in the saddle tightly holds the pipe 29 by the hemi-cylindrical part remote from the part engaged by the two semi-circular slot ends 35.
  • a separate tool not shown, commercially available from Conex Sanbra Limited and marketed under the name "CONEX TEE BREAK TOOL KIT", which has its own sealing system can then be attached to the threaded end 33 of the connector body 27 so as to seal the end 23 following which a shut-off valve (not shown), in this case a rotary plug valve, housed within the body 27 can be opened by means of a control screw 43 shown in Figure 2.
  • the tool is then operated to drill a hole in the right hand side of the pipe 29 by intrusion of the drill through the aperture left by the open plug valve.
  • the disc of pipe material cut free during this drilling operation is removed through the aperture in the plug valve to within the tool, and the tool cutter is itself retracted into the body of the tool, following which the plug valve can be closed by means of the screw 43.
  • the adapter comprising the cap nut 19 and tubular inlet stem 21 of the apparatus shown in Figure 1 is then reinstalled on the threaded end fitting 33 shown in Figure 2, and the Tee connector 17 is then ready for use during several corrosion inhibition operations at the appropriate intervals.
  • the dispensing apparatus 1 Each time a further inhibition operation is to be carried out the dispensing apparatus 1, with its bottle 3 unpressurized, is placed alongside the Tee connector 17 and the end of the flow line 9 is connected to the tubular inlet stem 21 by means of the clamp nut 25 and plastic compression ring 23.
  • the pump 5 By means of the handle 7 the pump 5 can then be operated to pressurize the bottle 3 and the liquid in the bottle 3 can then be placed under a pressure which is preferably at least as high as the internal pressure within the pipe 29 of the central heating system.
  • a location of the heating system near the top of the building to be heated it is possible to ensure that the pressure within the pipe 29 will be relatively low by virtue of the reduced hydrostatic head above that particular location.
  • the bottle 3 may be repressurized, partway through the dispensing operation (preferably while the plug valve is temporarily closed), and the dispensing operation can resume.
  • the operation of screwing the adapter 19, 21 on to the externally threaded end fitting 33 is advantageously carried out with the assistance of polytetrafluoroethylene tape first of all wrapped round the externally threaded end fitting 33 in order to ensure a liquid-tight joint at the adapter/fitting interface.
  • the adapter 19, 21 may be left in place for future operation so that this threaded attachment of the adapter, effected after extraction of the boring tool, can be left undisturbed.
  • the connector 17 has been referred to as a Tee connector, it is of course possible for the connector to be other than a right angle T configuration provided that some means is available for ensuring that the connector can be installed as a retro-fit to the pipework system.
  • any other suitable type of valve for example a gate valve may be used as the shut-off valve within the body 27.
  • liquid additive As explained above although the above description refers to the addition of a corrosion inhibitor to a central heating system, it is possible for the liquid additive to be of some other form, and typical non-limiting examples would be scale inhibitors or biocides.
  • the invention has broader application than simply to a central heating system and in general it may be applied to any existing pipework system in which a liquid under superatmospheric pressure is already present and it is desirable to introduce a liquid without draining down the system.
  • Particularly appropriate non-limiting examples are cooling water systems, industrial process water systems, low pressure boiler systems, oil refining systems, and paper pulp treatment systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
EP94308312A 1994-11-10 1994-11-10 Méthode et dispositif pour la distribution de liquide Withdrawn EP0711959A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94308312A EP0711959A1 (fr) 1994-11-10 1994-11-10 Méthode et dispositif pour la distribution de liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94308312A EP0711959A1 (fr) 1994-11-10 1994-11-10 Méthode et dispositif pour la distribution de liquide

Publications (1)

Publication Number Publication Date
EP0711959A1 true EP0711959A1 (fr) 1996-05-15

Family

ID=8217904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94308312A Withdrawn EP0711959A1 (fr) 1994-11-10 1994-11-10 Méthode et dispositif pour la distribution de liquide

Country Status (1)

Country Link
EP (1) EP0711959A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700295A1 (de) * 1997-01-08 1998-07-09 Reicon Waermetechnik Und Wasse Verfahren und Vorrichtung zur Dosierung von Konditionierungsmitteln in geschlossene und offene Systeme mit flüssigen und gasförmigen Medien
GB2387221A (en) * 2002-03-06 2003-10-08 Paul Graham Littlewood A Method and apparatus for introducing fluid into a sealed heating system
EP1643191A1 (fr) * 2004-10-01 2006-04-05 Judo Wasseraufbereitung GmbH Dispositif et procédé pour le traitement d'eau de chauffage
GB2431711A (en) * 2005-10-31 2007-05-02 Richard Strong Central heating inhibitor applicator
GB2473081A (en) * 2010-04-20 2011-03-02 Richard Anthony Cowley Apparatus or method of dispensing a corrosion inhibitor / chemicals into a central heating system
GB2588686A (en) * 2019-11-04 2021-05-05 Cook Bernard Chemical-agent dosing apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1420467A (fr) * 1964-10-23 1965-12-10 Zenith Dispositif pour permettre l'introduction d'un fluide dans un circuit déjà existantsans être dans l'obligation de faire une vidange ou une purge de l'installation
DE2905504A1 (de) * 1979-02-14 1980-08-28 Gefas Ges Fuer Angewandte Sola Einfuellvorrichtung
US4240459A (en) * 1977-09-14 1980-12-23 Trautwein Hansjoerg Valve assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1420467A (fr) * 1964-10-23 1965-12-10 Zenith Dispositif pour permettre l'introduction d'un fluide dans un circuit déjà existantsans être dans l'obligation de faire une vidange ou une purge de l'installation
US4240459A (en) * 1977-09-14 1980-12-23 Trautwein Hansjoerg Valve assembly
DE2905504A1 (de) * 1979-02-14 1980-08-28 Gefas Ges Fuer Angewandte Sola Einfuellvorrichtung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700295A1 (de) * 1997-01-08 1998-07-09 Reicon Waermetechnik Und Wasse Verfahren und Vorrichtung zur Dosierung von Konditionierungsmitteln in geschlossene und offene Systeme mit flüssigen und gasförmigen Medien
GB2387221A (en) * 2002-03-06 2003-10-08 Paul Graham Littlewood A Method and apparatus for introducing fluid into a sealed heating system
EP1643191A1 (fr) * 2004-10-01 2006-04-05 Judo Wasseraufbereitung GmbH Dispositif et procédé pour le traitement d'eau de chauffage
GB2431711A (en) * 2005-10-31 2007-05-02 Richard Strong Central heating inhibitor applicator
GB2473081A (en) * 2010-04-20 2011-03-02 Richard Anthony Cowley Apparatus or method of dispensing a corrosion inhibitor / chemicals into a central heating system
GB2473081B (en) * 2010-04-20 2012-02-29 Richard Antony Cowley Radiator dosing
GB2588686A (en) * 2019-11-04 2021-05-05 Cook Bernard Chemical-agent dosing apparatus
WO2021090000A1 (fr) * 2019-11-04 2021-05-14 Bernard Cook Appareil de dosage d'agent chimique
GB2588686B (en) * 2019-11-04 2023-05-31 Cook Bernard Chemical-agent dosing apparatus

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