WO1993016310A1 - Pressure/vacuum valve - Google Patents

Pressure/vacuum valve Download PDF

Info

Publication number
WO1993016310A1
WO1993016310A1 PCT/NO1993/000019 NO9300019W WO9316310A1 WO 1993016310 A1 WO1993016310 A1 WO 1993016310A1 NO 9300019 W NO9300019 W NO 9300019W WO 9316310 A1 WO9316310 A1 WO 9316310A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
weight
relief component
pressure
sectional area
Prior art date
Application number
PCT/NO1993/000019
Other languages
French (fr)
Inventor
Roger Gjerde
Original Assignee
John Gjerde A/S
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 John Gjerde A/S filed Critical John Gjerde A/S
Publication of WO1993016310A1 publication Critical patent/WO1993016310A1/en

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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F16K17/194—Equalising valves predominantly for tanks weight-loaded
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
    • F16K31/084—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet the magnet being used only as a holding element to maintain the valve in a specific position, e.g. check valves

Definitions

  • the present invention relates to a pressure/vacuum valve for
  • This layer will, in the same way as gas containers, be subject to pressure/vacuum at varying temperatures.
  • the objective of the present invention is thus to let excess pressure out and to let air into the container when negative pressure occurs.
  • Pressure/vacuum valves adapted for the use as described hereinabove are known. These known valves have, however, a spring-loaded opening which means that the more the valve is opened the greater the spring power, such that the opening pressure increases.
  • a pressure/vacuum valve which is characterized in that it comprises a pressure relief component and a vacuum relief component, the
  • pressure relief component comprising a movable weight connected to a magnet which interacts with the valve housing and the vacuum relief component comprising a movable weight.
  • the mass of the weight can be varied in order to obtain the desired properties of pressure.
  • the pressure relief component comprises an outlet nozzle with a cross-sectional area equal to the cross-sectional area of the pressure relief component at the flange, so that the cross- sectional area which the weight uncovers is greater than or equal to 1.5 times the cross-sectional area of the outlet nozzle.
  • the movable weight in the pressure relief component is connected via a rod-shaped body to a cover which interacts with the movement of the weight and closes or opens, respectively, the outlet nozzle of the valve.
  • Said rod-shaped body is connected to a test lever for manual manipulation of the valve.
  • the weight in the vacuum relief component is also connected to a test lever for manual manipulation of the valve.
  • Figure 1 shows a section through an embodiment of the valve according to the invention.
  • Figure 2 shows a section along the line A-A in figure 1.
  • Figure 3 shows a section along the line B-B in figure l.
  • Figure 4 shows a section along the line C-C in figure 1.
  • Figure 5 shows a section along the line D-D in figure 1.
  • Figures l to 5 illustrate an embodiment of a valve according to the invention.
  • Figure 1 shows a section through the valve, comprising a flange (1) for coupling the valve to a container.
  • the internal cross-sectional area of the flange (1) is equal to the cross-sectional area of the outlet nozzle (4) .
  • a magnet (2) which is attached via a rod-shaped body to a weight (3) , is arranged above the flange. The magnet interacts with the valve housing. When excess pressure occurs in the tank the pressure will work against the underside of the weight (3) and lift said weight when the pressure exceeds the force that is necessary to overcome the mass of the piston and the force of the magnet.
  • the purpose of the magnet (2) is to ensure that the valve opens and closes with precision.
  • the weight (3) is connected via a rod-shaped body (11) to a cover (9) on the top of the valve.
  • the purpose of the cover is to prevent water and dust from penetrating into the valve. When the weight (3) is raised this will result in the cover (9) uncovering the opening in the top of the valve. When the weight (3) is lowered again the cover (9) will close the opening.
  • On the top or by the outlet opening of the valve there is a nozzle (4) which has a smaller cross-sectional area than the opening (10) which the weight uncovers on opening. The purpose of this is to increase the rate of the gas flow so that it exceeds 30m/sec.
  • the rod (11) which connects the weight (3) with the cover (9) is also connected to a test lever (5) to enable manual testing of the function of the valve to be conducted.
  • the valve also comprises a device for allowing air or another suitable gas into the container if a vacuum occurs.
  • This device comprises a weight (7) , a flame arrestor (6) and a test lever (8) .
  • the mass of the weight (7) can be determined in such a way that the device opens at a specified vacuum.
  • the flame arrestor (6) will prevent any flames outside the valve from penetrating therein.
  • the test lever (8) makes possible manual control of the function of the vacuum device.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Abstract

A valve for regulating negative pressure and excess pressure in a container is described. The valve comprises a pressure relief component having a movable weight (3) connected to a magnet (2) and an outlet nozzle (4). In order to obtain an outflow rate from the valve that is greater than or equal to 30 m/sec, the cross-sectional area which the weight (3) uncovers is greater than or equal to 1.5 times the cross-sectional area of the outlet nozzle. The valve also comprises a vacuum relief component consisting of a movable weight (7) and a flame arrestor (6). Both the vacuum relief component and the pressure relief component are furnished with test levers (5, 8) for the manual manipulation of the functions of the valve. A cover (9), which interacts with the movements of the weight (3), is also arranged on the pressure relief component of the valve.

Description

PRESSURE/VACUUM VALVE t
The present invention relates to a pressure/vacuum valve for
5 regulating pressure/vacuum in tanks and similar containers.
Pressure or vacuum will arise in storage containers for liquid and gas, especially those that are placed outdoors, due to variations in temperature. Gas tanks are particularly
10 vulnerable because the thermal expansion coefficient for gases is greater than for liquids. In the case of liquid containers the thermal expansion/contraction will be relatively small when the container is full, but as soon as the container begins to be emptied there will be a gas/air layer above the liquid.
15 This layer will, in the same way as gas containers, be subject to pressure/vacuum at varying temperatures. The objective of the present invention is thus to let excess pressure out and to let air into the container when negative pressure occurs.
20 Pressure/vacuum valves adapted for the use as described hereinabove are known. These known valves have, however, a spring-loaded opening which means that the more the valve is opened the greater the spring power, such that the opening pressure increases.
25
These disadvantages are overcome and these objectives are achieved by means of a pressure/vacuum valve according to the invention which is characterized in that it comprises a pressure relief component and a vacuum relief component, the
30 pressure relief component comprising a movable weight connected to a magnet which interacts with the valve housing and the vacuum relief component comprising a movable weight. The mass of the weight can be varied in order to obtain the desired properties of pressure.
35 The pressure relief component comprises an outlet nozzle with a cross-sectional area equal to the cross-sectional area of the pressure relief component at the flange, so that the cross- sectional area which the weight uncovers is greater than or equal to 1.5 times the cross-sectional area of the outlet nozzle.
The movable weight in the pressure relief component is connected via a rod-shaped body to a cover which interacts with the movement of the weight and closes or opens, respectively, the outlet nozzle of the valve. Said rod-shaped body is connected to a test lever for manual manipulation of the valve. The weight in the vacuum relief component is also connected to a test lever for manual manipulation of the valve.
The invention will be described in more detail hereinbelow by means of an embodiment example with reference to the attached drawings.
Figure 1 shows a section through an embodiment of the valve according to the invention.
Figure 2 shows a section along the line A-A in figure 1.
Figure 3 shows a section along the line B-B in figure l.
Figure 4 shows a section along the line C-C in figure 1.
Figure 5 shows a section along the line D-D in figure 1.
Figures l to 5 illustrate an embodiment of a valve according to the invention. Figure 1 shows a section through the valve, comprising a flange (1) for coupling the valve to a container. The internal cross-sectional area of the flange (1) is equal to the cross-sectional area of the outlet nozzle (4) . A magnet (2) , which is attached via a rod-shaped body to a weight (3) , is arranged above the flange. The magnet interacts with the valve housing. When excess pressure occurs in the tank the pressure will work against the underside of the weight (3) and lift said weight when the pressure exceeds the force that is necessary to overcome the mass of the piston and the force of the magnet. The purpose of the magnet (2) is to ensure that the valve opens and closes with precision. Without said magnet (2) the valve would "float" in a state of equilibrium when the counterpressure is equal to the mass of the weight (3) . The weight (3) is connected via a rod-shaped body (11) to a cover (9) on the top of the valve. The purpose of the cover is to prevent water and dust from penetrating into the valve. When the weight (3) is raised this will result in the cover (9) uncovering the opening in the top of the valve. When the weight (3) is lowered again the cover (9) will close the opening. On the top or by the outlet opening of the valve there is a nozzle (4) which has a smaller cross-sectional area than the opening (10) which the weight uncovers on opening. The purpose of this is to increase the rate of the gas flow so that it exceeds 30m/sec. The reason for this is that the various bodies responsible for approving valves of this kind (e.g., Det Norske Veritas and Lloyds) require a gas rate of 30 m/sec or more in an upwardly directed jet from any apparatus whatsoever. The purpose of this requirement is to prevent flames from moving down through the valve during a blow-out. The cover (9) on the top of the valve will also, to a certain extent, prevent any flames outside the valve from penetrating therein. The desired minimum outlet rate of 30 m/sec is attained by the cross-sectional area, which is uncovered when the weight (3) is moved, being greater than or equal to 1.5 times the cross-sectional area of the inlet (1) . The pressure relief component of the valve is also shown in more detail in figures 3 and 5.
The rod (11) which connects the weight (3) with the cover (9) is also connected to a test lever (5) to enable manual testing of the function of the valve to be conducted.
The valve also comprises a device for allowing air or another suitable gas into the container if a vacuum occurs. This device comprises a weight (7) , a flame arrestor (6) and a test lever (8) . The mass of the weight (7) can be determined in such a way that the device opens at a specified vacuum. The flame arrestor (6) will prevent any flames outside the valve from penetrating therein. The test lever (8) makes possible manual control of the function of the vacuum device.

Claims

C l a i m s
1.
A valve for regulating the pressure in containers, consisting of a pressure relief component and a vacuum relief component, the pressure relief component comprising a movable weight (3) connected to a magnet (2) , said magnet (2) interacting with the valve housing and the vacuum relief component comprising a movable weight (7) , characterized in that said pressure relief component comprises a outlet nozzle (4) , such that the cross- sectional area which the weight (3) uncovers is greater than or equal to 1.5 times the cross-sectional area of the outlet nozzle (4) .
2.
A valve according to the preceding claim, characterized in that the movable weight (3) is connected via a rod-shaped body (11) to a cover (9) which interacts with the movement of the weight (3) and opens or closes, respectively, the outlet nozzle (4) of the valve.
3.
A valve according to claim 1 or claim 2, characterized in that the rod-shaped body (11) is connected to a test lever (5) for manual manipulation of the valve.
4.
A valve according to any one of the preceding claims, characterized in that the weight (7) in the vacuum relief component is connected to a test lever (8) for the manual manipulation of the valve.
PCT/NO1993/000019 1992-02-05 1993-02-02 Pressure/vacuum valve WO1993016310A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO920468A NO177135C (en) 1992-02-05 1992-02-05 Valve for pressure control of container
NO920468 1992-02-05

Publications (1)

Publication Number Publication Date
WO1993016310A1 true WO1993016310A1 (en) 1993-08-19

Family

ID=19894843

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1993/000019 WO1993016310A1 (en) 1992-02-05 1993-02-02 Pressure/vacuum valve

Country Status (3)

Country Link
AU (1) AU3576593A (en)
NO (1) NO177135C (en)
WO (1) WO1993016310A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996035898A1 (en) * 1995-05-10 1996-11-14 John Gjerde A.S Pressure/vacuum valve
WO1997018410A1 (en) * 1995-11-14 1997-05-22 Vapa-Sava Uk Sales & Distribution Limited Vapour containment valve
EP1130298A1 (en) * 2000-03-01 2001-09-05 van der Velde, Ide Albert Water-repellent ventilation valve
KR100629623B1 (en) 2005-07-25 2006-10-04 유니테크 주식회사 Relief valve
CN1304776C (en) * 2001-05-25 2007-03-14 普瑞斯-维科工程公司 Pressure valve
WO2011032561A2 (en) 2009-09-15 2011-03-24 Soerensen Eric Aarestrup A venting valve for cargo tanks
WO2013068012A1 (en) 2011-11-09 2013-05-16 Soerensen Eric Aarestrup A venting valve for cargo tanks
WO2016032339A1 (en) * 2014-08-26 2016-03-03 Ventiq As Valve for ventilation of a tank
CZ306633B6 (en) * 2010-04-23 2017-04-12 DAG - TS s.r.o. A double-acting relief gravity valve, particularly for regulating the positive and negative pressure in storage tanks and with similar devices with a variable pressure environment
WO2018016971A1 (en) * 2016-07-21 2018-01-25 Ventiq As Pressure relief valve
WO2018211266A1 (en) * 2017-05-16 2018-11-22 Elmac Technologies Limited Valve apparatus
US11846360B2 (en) 2018-11-14 2023-12-19 Franklin Fueling Systems, Llc Pressure vacuum valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103248B (en) * 1959-03-12 1961-03-23 Wilke Werke Ag Emergency ventilation and venting device for containers filled with flammable liquids
DK127756B (en) * 1970-10-20 1973-12-31 Nielsens C Eftf As Quick opening and closing overpressure valve.
DK149395B (en) * 1974-07-03 1986-05-26 Emil Aarestrup Soerensen PRESSURE VALVE PRESSURE EQUALITY BETWEEN A CLOSED ROOM AND THE SURROUNDING ATMOSPHERE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103248B (en) * 1959-03-12 1961-03-23 Wilke Werke Ag Emergency ventilation and venting device for containers filled with flammable liquids
DK127756B (en) * 1970-10-20 1973-12-31 Nielsens C Eftf As Quick opening and closing overpressure valve.
DK149395B (en) * 1974-07-03 1986-05-26 Emil Aarestrup Soerensen PRESSURE VALVE PRESSURE EQUALITY BETWEEN A CLOSED ROOM AND THE SURROUNDING ATMOSPHERE

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996035898A1 (en) * 1995-05-10 1996-11-14 John Gjerde A.S Pressure/vacuum valve
WO1997018410A1 (en) * 1995-11-14 1997-05-22 Vapa-Sava Uk Sales & Distribution Limited Vapour containment valve
EP1130298A1 (en) * 2000-03-01 2001-09-05 van der Velde, Ide Albert Water-repellent ventilation valve
NL1014531C2 (en) * 2000-03-01 2001-09-21 Ide Albert Van Der Velde Water-resistant ventilation valve.
CN1304776C (en) * 2001-05-25 2007-03-14 普瑞斯-维科工程公司 Pressure valve
KR100629623B1 (en) 2005-07-25 2006-10-04 유니테크 주식회사 Relief valve
WO2011032561A2 (en) 2009-09-15 2011-03-24 Soerensen Eric Aarestrup A venting valve for cargo tanks
CZ306633B6 (en) * 2010-04-23 2017-04-12 DAG - TS s.r.o. A double-acting relief gravity valve, particularly for regulating the positive and negative pressure in storage tanks and with similar devices with a variable pressure environment
WO2013068012A1 (en) 2011-11-09 2013-05-16 Soerensen Eric Aarestrup A venting valve for cargo tanks
CN106794892A (en) * 2014-08-26 2017-05-31 文迪克公司 For the valve of tank ventilation
WO2016032339A1 (en) * 2014-08-26 2016-03-03 Ventiq As Valve for ventilation of a tank
CN106794892B (en) * 2014-08-26 2018-11-23 文迪克公司 Valve for tank ventilation
US10301000B2 (en) 2014-08-26 2019-05-28 Ventiq As Valve for ventilation of a tank
WO2018016971A1 (en) * 2016-07-21 2018-01-25 Ventiq As Pressure relief valve
EP3488132A4 (en) * 2016-07-21 2019-08-14 Ventiq AS Pressure relief valve
RU2740077C2 (en) * 2016-07-21 2021-01-11 Вентик Ас Pressure relief valve
US10962127B2 (en) 2016-07-21 2021-03-30 Ventiq As Pressure relief valve
WO2018211266A1 (en) * 2017-05-16 2018-11-22 Elmac Technologies Limited Valve apparatus
GB2564535A (en) * 2017-05-16 2019-01-16 Elmac Tech Limited Valve apparatus
GB2564535B (en) * 2017-05-16 2019-12-25 Elmac Tech Limited Valve apparatus
US11802626B2 (en) 2017-05-16 2023-10-31 Elmac Technologies Limited Valve apparatus
US11846360B2 (en) 2018-11-14 2023-12-19 Franklin Fueling Systems, Llc Pressure vacuum valve

Also Published As

Publication number Publication date
NO920468D0 (en) 1992-02-05
AU3576593A (en) 1993-09-03
NO177135C (en) 1996-12-30
NO177135B (en) 1995-04-18
NO920468L (en) 1993-08-06

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