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WO1999027285A1 - Soupape actionnee par rayonnement - Google Patents

Soupape actionnee par rayonnement Download PDF

Info

Publication number
WO1999027285A1
WO1999027285A1 PCT/AP1998/000007 AP9800007W WO9927285A1 WO 1999027285 A1 WO1999027285 A1 WO 1999027285A1 AP 9800007 W AP9800007 W AP 9800007W WO 9927285 A1 WO9927285 A1 WO 9927285A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
membrane
flow path
resistive element
radiation means
Prior art date
Application number
PCT/AP1998/000007
Other languages
English (en)
Inventor
Leslie Gerhard Lubbe
Original Assignee
Chengeta, Cuthbert
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 Chengeta, Cuthbert filed Critical Chengeta, Cuthbert
Priority to JP2000522391A priority Critical patent/JP2001524651A/ja
Priority to AU12179/99A priority patent/AU1217999A/en
Priority to EP98955248A priority patent/EP1030990A1/fr
Publication of WO1999027285A1 publication Critical patent/WO1999027285A1/fr

Links

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
    • F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
    • F16K13/04—Other constructional types of cut-off apparatus; Arrangements for cutting-off with a breakable closure member

Definitions

  • This invention relates to a valve, more particularly, but not exclusively, to a valve for controlling the release of fluid under pressure.
  • valves The flow of fluids is almost invariably controlled by valves. While many valves allow the rate of fluid flow to be controlled, it is often not necessary for valves to be capable of this. For example, where it is desired to quickly release fluid under pressure, it suffices to have a valve which merely prevents flow or permits flow. Apart from "bursting disc" type valves which permit flow once pressure exceeds a maximum, the applicant knows of no other valve which can be selectively opened without the need for moving parts which add to the expense of valves and effect the reliability thereof. The latter two considerations are frequently of great importance when selecting valves.
  • a valve comprising a body with a flow path therethrough, a membrane associated with the flow path to prevent fluid flow therethrough, and radiation means located adjacent at least part of the membrane and selectively operable to irradiate the membrane to cause weakening or destruction of at least a part thereof.
  • the radiation means to provide heat; for the radiation means to be a resistive element; for the body to be in the form of a board with at least one orifice therethrough defining the flow path; and for the resistive element to extend at least partially around the circumference of the at least one orifice.
  • the membrane to be made of a plastics material; for the membrane to be adhesively secured to the body over one end of the flow path; for the membrane to be formed from a number of layers of a material; and for the membrane to be operatively melted by the radiation means.
  • the body to be securable to a reservoir with the flow path adjacent an outlet from the reservoir; for the radiation means to be connected through a switch to electricity supply means; for the electricity supply means to be a battery or mains supply; and for the body to be a circuit board with the resistive element printed thereon; alternatively for the resistive element to be printed on the membrane; further alternatively to be captured within the membrane.
  • Figure 1 is an oblique view of a first embodiment of a valve
  • Figure 2 is a sectional side elevation of the valve in Figure 1 ;
  • Figure 3 is a part sectional side elevation of the valve in Figure 1 in use on a reservoir;
  • Figure 4 is an oblique view of a second embodiment of a valve
  • Figure 5 is an oblique exploded view of a third embodiment of a valve
  • Figure 6 is an oblique view of a fourth embodiment of a valve.
  • Figure 7 is an oblique view of a trunk with a pressurised container located therein.
  • a valve (1) is shown in Figures 1 and 2 and includes a board-like body (2) having a top surface (3) and a bottom surface (4) and a central orifice (5) extending between the surfaces (3,4).
  • the body (2) is made from material used to construct electronic circuit boards.
  • a resistive element (6) is printed on the body (2) to extend part way about the circumference of the orifice (5) from contact points (7) near a side (8) of the body (2).
  • a membrane (10) made from a plastics material is adhesively secured to the body (2) over the orifice (5) and resistive element (6).
  • Electrical wiring (11) is soldered to the contact points (7) to connect the resistive elements (6) with a battery (12) and a normally open in-line switch (13).
  • the switch (13) is closed causing an electrical current to flow through the resistive element (6) to produce heat.
  • the heat produced due to the short circuit melts that part of the membrane (10) abutting the resistive element (6).
  • the membrane (10) is subjected to pressure in the direction of the orifice (5), the melting thereof allows the pressure to rupture the membrane.
  • the body (2) can be secured between flanges (20) over the outlet (21) of a reservoir (22) filled with a fluid (23) under pressure.
  • the body (2) will be secured with the top side (3) carrying the membrane (10) facing into the reservoir (22).
  • the membrane (10) is selected to withstand the pressure of the fluid thereon and so prevent fluid flow through the outlet (21) and orifice (5).
  • the material used in the membrane (10) will also be selected ' to resist corrosion that could possibly be caused by the fluid (23). It has been found that the material sold under the brand name "Mylar" and which is supplied with an adhesive backing provides excellent resistance to a wide range of fluids and to deformation by pressure, but any suitable material can be used.
  • the switch (13) When it is desired to release the fluid (23) in the reservoir (22), the switch (13) is closed causing the membrane (10) to melt as described above, allowing the fluid (23) to escape through the outlet (21 ) and orifice (5).
  • valve of the invention can only be used once, it can easily be replaced without incurring significant costs.
  • a valve (40) could include a board-like body (41) with an elongate aperture (42) therethrough covered by a suitably shaped membrane (43) and having a resistive element (44) extending across the orifice (42) as shown in Figure 4.
  • the resistive element will be a length of resistive wire.
  • a number of apertures can be formed in a valve body rather than a single large aperture. This helps reduce distortion of the membrane caused by pressure.
  • the membrane (50) can have two layers (51) with a resistive element (52) interposed between the layers (51).
  • the membrane (50) is secured to a cylindrical valve body (55) by a radially inwardly extending flange (56) at the end of a sleeve (57), the body (55) and sleeve (57) being complimentary threaded (58) for engagement of the sleeve (57) over the body (55).
  • An aperture (59) in the flange (56) receives a connecting wire (60) from the resistive element (52).
  • the use of layers has been found to be particularly useful where the material used for the membrane tends to exhibit non-uniform strength characteristics. Any suitable material can be used and the thickness of the material used will depend on the application.
  • the membrane can be in the form of a thick disc of plastics material with a resistive element moulded therein.
  • radiation such as gamma radiation could even be used to weaken or destruct a membrane.
  • the radiation source and valve body would be of suitably robust construction and not be intended for disposal, whereas the membrane would be easily replaceable after destruction.
  • a resistive element (70) can be printed on a membrane (71) of a suitable material, for example the material used for dot matrix printer head cables.
  • the resistive element can be made to extend over the orifice (72) in a valve body (73) and by exciting the element with electrical current using suitable control means (74) a strain gauge can be formed. This will allow the pressure in a reservoir (not shown) to be monitored.
  • the membrane (71) can be made to rupture as described above. This form of vaive will be particularly useful where it is important to measure reservoir pressure as a separate pressure monitoring system is obviated.
  • the control means (74) can be configured to cause rupture of the membrane where the pressure level in the reservoir exceeds a certain limit.
  • a trunk (80) is shown for use in transporting cash and, in conventional fashion is supplied with a lid (81) hingedly secured thereto and a handle (82).
  • the lid (81) is selectively lockable to prevent access to the trunk (80), and the locking mechanism is controlled through a key pad (83) and a processor (not shown).
  • a pressurised cylinder (84) containing a banknote staining die is secured inside the trunk (80) by straps (85).
  • the container (80) has a nozzle (86) with a valve described with reference to Figures 1 and 2 preventing flow through the nozzle (86).
  • a battery (87) provides the processor with electrical power and is also used to open the valve.
  • the trunk (80) is loaded with cash and locked and can only be opened when a code is entered using the key pad (83). If the lid (81) is forced open, or the incorrect code entered, the processor acts as a switch to create a closed circuit between the battery (87) and the valve in the nozzle (86) to open the valve. In this way, the contents of the container (84) can be reliable and quickly dispensed into the trunk.
  • the processor could be programmable to only allow opening of the lid after a predetermined time or could even include a receiving unit for a remote signal to allow remote operation of the valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

L'invention concerne une soupape (1) présentant un corps doté d'un passage (5) d'écoulement la traversant. Une membrane empêche l'écoulement du fluide à travers le passage d'écoulement. Un organe de rayonnement, selon une mode de réalisation, ou un élément thermique (6) est adjacent à la membrane et peut être actionné pour affaiblir ou empêcher au moins une partie de l'écoulement.
PCT/AP1998/000007 1997-11-19 1998-11-18 Soupape actionnee par rayonnement WO1999027285A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2000522391A JP2001524651A (ja) 1997-11-19 1998-11-18 放射作動型バルブ
AU12179/99A AU1217999A (en) 1997-11-19 1998-11-18 Radiation actuated valve
EP98955248A EP1030990A1 (fr) 1997-11-19 1998-11-18 Soupape actionnee par rayonnement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA97/7420 1997-11-19
ZA977420 1997-11-19

Publications (1)

Publication Number Publication Date
WO1999027285A1 true WO1999027285A1 (fr) 1999-06-03

Family

ID=25586547

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AP1998/000007 WO1999027285A1 (fr) 1997-11-19 1998-11-18 Soupape actionnee par rayonnement

Country Status (5)

Country Link
EP (1) EP1030990A1 (fr)
JP (1) JP2001524651A (fr)
AU (1) AU1217999A (fr)
WO (1) WO1999027285A1 (fr)
ZA (1) ZA9810488B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1734186A (en) * 1926-07-14 1929-11-05 Weidmann Lucien Fire-extinguishing arrangement
GB1106315A (en) * 1965-03-29 1968-03-13 Soc Et Propulsion Par Reaction Improvements in or relating to pressurised fluid containers
DE19524094A1 (de) * 1995-07-01 1997-01-02 Temic Bayern Chem Airbag Gmbh Pyrotechnikfreier Gasgenerator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1734186A (en) * 1926-07-14 1929-11-05 Weidmann Lucien Fire-extinguishing arrangement
GB1106315A (en) * 1965-03-29 1968-03-13 Soc Et Propulsion Par Reaction Improvements in or relating to pressurised fluid containers
DE19524094A1 (de) * 1995-07-01 1997-01-02 Temic Bayern Chem Airbag Gmbh Pyrotechnikfreier Gasgenerator

Also Published As

Publication number Publication date
ZA9810488B (en) 1999-05-20
AU1217999A (en) 1999-06-15
EP1030990A1 (fr) 2000-08-30
JP2001524651A (ja) 2001-12-04

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