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WO2023115179A1 - Procédé et système de détection de changement de contenants de stockage de fluides sous pression - Google Patents

Procédé et système de détection de changement de contenants de stockage de fluides sous pression Download PDF

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Publication number
WO2023115179A1
WO2023115179A1 PCT/BR2022/050420 BR2022050420W WO2023115179A1 WO 2023115179 A1 WO2023115179 A1 WO 2023115179A1 BR 2022050420 W BR2022050420 W BR 2022050420W WO 2023115179 A1 WO2023115179 A1 WO 2023115179A1
Authority
WO
WIPO (PCT)
Prior art keywords
exchange
fluid storage
storage container
detecting
storage containers
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.)
Ceased
Application number
PCT/BR2022/050420
Other languages
English (en)
Portuguese (pt)
Inventor
Davi Francisco Caetano Dos Santos
Robson BAPTISTA GAMA
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.)
Robert Bosch Ltda
Original Assignee
Robert Bosch Ltda
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
Priority claimed from BR102021025978-7A external-priority patent/BR102021025978A2/pt
Application filed by Robert Bosch Ltda filed Critical Robert Bosch Ltda
Publication of WO2023115179A1 publication Critical patent/WO2023115179A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water

Definitions

  • the present invention relates to a method and system for detecting the exchange of fluid storage containers under pressure, mainly for cylinders carrying LPG, but not limited to this type of application.
  • This method and system detects whether fluid storage containers have been exchanged from the impedance reading to which the system is associated, and can also assess whether the exchange was carried out using good practices or not.
  • LPG liquefied petroleum gas
  • This petroleum derivative is defined as a mixture formed mainly by hydrocarbon molecules containing three to four carbon atoms which, although gaseous under normal conditions of temperature and pressure (better known as CNTP), can be liquefied by cooling or compression.
  • CNTP liquefied petroleum gas
  • LPG gas is commonly stored and marketed in pressure fluid storage containers, such containers commonly called cylinders, as they are easily transformed into liquids under pressure. Cylinders thus have an internal pressure 6 to 8 times greater than atmospheric pressure.
  • the average composition of LPG gas is 31.76% butenes, 30.47% propylene, 23.33% butanes, 14.34% propane, 0.3% ethane and 0.07% pentanes, with variations in this composition depending on the source of supply.
  • This gaseous mixture has almost twice the density of air, where butane alone is almost three times as dense, so if there is a leak, the tendency is for the gas to accumulate close to the ground. This makes it especially dangerous if not noticed, as butane expels breathable air from that region and leads to asphyxiation - in addition to explosion if any ignition source is triggered.
  • the most used olfactory marker is ethanethiol, with the purpose of assigning smell and not affecting the properties of the gas, since the human sense of smell is capable of perceiving one part in another 2.8 billion parts of air.
  • LPG gas In addition to being easy to transport due to its high-pressure liquefaction characteristics, LPG gas has a high calorific value, excellent burning quality and, in particular, low environmental impact due to its low emission of pollutants. Comparing the CO2 released during the burning of coal or other fossil fuel that generates waste with that of LPG, there is a much lower level of emission, in addition to its higher calorific value - with less gas it is possible to obtain the same amount of heat , helping to preserve the environment since CO2 is one of the gases that cause the greenhouse effect and global warming.
  • LPG gas in the stove depends on the evaporation of the pressurized liquid. In this way, an “empty” volume is needed inside the storage container, which actually has vapors in equilibrium with the liquid, which allows for gas expansion (commonly called dead volume).
  • the cylinders are filled up to 85% of their capacity, reserving the 15% for this expansion.
  • the coexistence of LPG in liquid and gaseous form inside the cylinder is possible thanks to the saturated vapor pressure (pvs), which varies depending on the gas composition and temperature, according to the Clausius-Clapeyron equation (which is used to characterize a discontinuous phase transition between two phases of matter of a single constituent).
  • the P5, P8 and P13 type cylinders are intended for domestic use, both residential and for camping or activities that require mobility.
  • the weight of each one is 5kg, 8kg and 13kg, respectively having a diameter of 272mm, 300mm and 360mm, and a height of 341mm, 464mm and 476mm.
  • the vaporization rate at 20°C is 0.4kg per hour for P5, 0.5kg per hour for P8 and 0.6kg per hour for P13. They have a safety device called a fusible plug where, when exposed to temperatures between 70°C and 77°C, the device melts releasing the internal gas to relieve pressure and prevent explosion.
  • the P20 cylinder is most commonly used in forklifts and for ballooning, having a weight of 20 kg. Its diameter is 310mm with a height of 878mm, and its safety system is a manually operated valve that, through user action, releases the gas to prevent explosions.
  • the P45 cylinder which weighs 45kg, is more suitable for industrial use, bars, restaurants and snack bars, and can also be used for ballooning activities. It is still possible to be adopted in residential environments when there is a higher consumption, such as gas heaters and showers, thus being considered inefficient the use of the traditional P13. It has a diameter of 376.5mm and a height of 1299mm, with steaming at 20°C of 1 kg per hour.
  • the P90 cylinder is also indicated for industrial use, in addition to restaurants, pharmacies, ballooning and hospitals. Its diameter is 556mm and height is 1203.5mm, with vaporization at 20°C of 1 kg per hour.
  • Such containers need to offer mechanical resistance to impacts during transport, in addition to withstanding an internal pressure of approximately 17 kgf/cm 2 .
  • the material used in its manufacture is steel, which undergoes various manipulations and welding for its assembly, in addition to the so-called thermal treatment where the piece is heated to relieve the tension of the steel and provide the best possible arrangement of its molecules, gaining hardness and resistance. .
  • After heating and completely cooling the containers they receive the safety valve, which serves to expel the gas in case of heating of the environment where the container is installed, and finally an anti-corrosive painting.
  • Patent document GB2486018 describes a medical gas supply deflection monitor, adapted to attach to a pressurized gas container for supply to a human or animal patient, monitoring the gas supply in the container.
  • a movement sensor such as a gyroscope, accelerometer and vibration sensor, which aims to detect patient movement, mainly to assess medical risks and call attention to the need for such movement.
  • the handling requires sudden movements and displacements that are detected by the device, not taking into account movements such as threading to change the cylinder.
  • the main objective of the present invention is to reveal a method and system for detecting the exchange of storage containers for fluids under pressure, mainly for cylinders carrying LPG, but not limited to this type of application.
  • the present invention aims to reveal a method and system that detects whether there has been an exchange from measuring the impedance of the container.
  • the method of detecting the exchange of fluid storage containers under pressure comprises the fact that there is a step prior to the step obtaining at least a first impedance signal of at least one storage container by means of at least one impedance measurement unit which identifies whether the impedance signal obtained from at least one storage container by means of at least one impedance measurement unit is outside at least one algorithmically defined threshold of digital signal processing.
  • a method of detecting the exchange of storage containers for fluids under pressure is provided, understood by the fact that in the step of identifying whether at least one storage container has been exchanged, the type of exchange profile performed is also identified.
  • the present invention proposes a system for detecting the exchange of pressure fluid storage containers, comprising: at least one impedance measurement unit associated with a storage container and at least one processing unit.
  • the system for detecting the exchange of pressure fluid storage containers further comprises at least one interface unit.
  • the system for detecting the exchange of storage containers for fluids under pressure further comprises the fact that the impedance measurement unit is associated by contact between the storage container with at least one connector associated with the impedance measurement unit.
  • the invention includes a system for detecting the exchange of fluid storage containers under pressure, understood by the fact that the device is associated with at least one storage container by at least one valve.
  • the present invention includes a system for detecting the exchange of pressure fluid storage containers, understood by the fact that the impedance measurement unit is associated with the device.
  • Figure 1 illustrates an exchange detection system for fluid storage containers under pressure installed in a storage container.
  • Figure 2 illustrates a system for detecting the exchange of fluid storage containers under pressure together with the pressure regulator valve.
  • Figure 3 illustrates the pressure fluid storage container equipped with a device associated with the pressure regulator valve.
  • Figure 4 illustrates a graph of impedance by time when changing the fluid storage container using bare hands.
  • Figure 5 illustrates a graph of impedance by time when changing the fluid storage container using hands dressed in gloves of dielectric material.
  • Figure 6 illustrates a graph of impedance by time demonstrating the difference when changing the fluid storage container using bare hands and hands dressed in gloves of dielectric material.
  • a method for detecting the exchange of pressure fluid storage containers comprising the steps of: obtaining at least a first impedance signal from at least one storage container 7 by means of at least at least one impedance measurement unit 1, process the signals obtained by at least one processing unit 2, compare the first signal obtained with at least a second signal processed by means of a processing unit 2 and identify whether there was an exchange of at least one least one storage container 7.
  • a predetermined sampling period is used, in order to monitor throughout the use of the container.
  • the processing unit 2 performs identification of the obtained signals and transforms them into digital signals to be analyzed, thus comparing the first obtained signal with at least one second processed signal that through a behavior and predefined thresholds, allows the processing unit to identify if at least one storage container has been changed 7.
  • Figure 1 exemplifies an impedance measurement unit 1 associated with a processing unit 2, preferably associated with a device 8, which in turn is associated with a valve 6 that is coupled to the storage container 7 by threading .
  • a processing unit 2 preferably associated with a device 8
  • a valve 6 that is coupled to the storage container 7 by threading .
  • connector 4 Associated with the impedance measurement unit 1 is connector 4 that maintain contact with the storage container 7.
  • Figure 2 illustrates the device 8 together with the valve and figure 3 the arrangement of the device 8 in the upper part of the storage container 7.
  • the method of detecting the exchange of fluid storage containers under pressure comprises the fact that there is a step prior to the step of obtain at least a first impedance signal from at least one storage container 7 by means of at least one impedance measurement unit 1 which identifies whether the impedance signal obtained from at least one storage container 7 by means of at least one impedance measurement unit 1 is outside at least a threshold defined by means of digital signal processing algorithms. So that the received signal does not suffer external interference and is not susceptible to small variations, it is identified by means of digital signal processing algorithms and detection thresholds are defined by at least one processing unit 2. Such algorithm can be performed by means of filtering (high pass filters), alternatively through simple moving averages or any algorithm that is able to remove the noise from the measurement, define an average and variation thresholds that deviate from a normalized measurement standard behavior.
  • filtering high pass filters
  • the method of detecting the exchange of pressure fluid storage containers comprises the fact that in the step of identifying whether at least one storage container has been exchanged, the type of exchange profile performed is also identified. In this way, it is possible to detect whether the change was carried out with bare hands or with hands wearing gloves made of dielectric material.
  • FIG 4 illustrates when the change of container is performed with bare hands, with a direct touch by the person performing the change.
  • point 91 we can identify the moment when the person started the “unscrewing” of the valve 6 together with the device 8, followed by a small depression that characterizes that the device 8 together with the valve 6 was uncoupled from the storage container 7, to have again an increase and continue until point 92 which characterizes the end of the “threading” for fixing the valve 6 together with the device 8 in the new storage container 7.
  • figure 5 illustrates when changing the container is carried out with gloved hands, isolating and not directly touching the person is performing the exchange.
  • point 101 we can identify the moment when the person started the “unscrewing” of the valve 6 together with the device 8 (in which the difference in stability is very subtle compared to the change with bare hands) followed by a great depression caused by the non-interference of the body mass in the impedance measurement and characterizing that the device 8 together with the valve 6 is uncoupled from the storage container 7, to again have an increase and continue to point 102 that characterizes the end of the “threading” for fixing the valve 6 together with device 8 in the new storage vessel 7.
  • a system for detecting the exchange of fluid storage containers under pressure comprising: at least one impedance measurement unit 1 associated with a storage container 7 and at least one processing unit 2.
  • impedance measurement 1 can be a capacitance meter or any device capable of measuring electrical impedance of the mass of the storage container 7.
  • the processing unit 2 can be any device equipped with processing and memory capable of acquiring and processing data running internal routines pre defined.
  • the system proposed here comprises at least one interface unit 3.
  • Such an interface can provide communication with external devices, being able to operate in some communication protocol (such as serial, wifi, bluetooth, LoRa, etc.), which would also provide data processing externally, either on a network or “in the cloud” on the world wide web.
  • the interface unit 3 can interface with the user, by means of a screen, man-machine interface, or even some digital input to receive some command, such as a first start, commissioning notice, etc.
  • the system for detecting the exchange of pressure fluid storage containers comprises the fact that the impedance measurement unit 1 is associated by contact between the storage container 7 with at least one connector 4.
  • figure 1 illustrates the connector 4 on the “threading” male that fixes the valve 6 in the storage container 7, causing the contact of the two devices so that the impedance can be measured.
  • the impedance measurement by the impedance measurement unit 1 could also be carried out by contacting the valve body 6 and the butterfly 5 at any point of the mass of the storage container 7, as long as it is directly on the metal, without interference from paintings , resins or any dielectric material.
  • the system for detecting the exchange of fluid storage containers under pressure further comprises the fact that the device 8 is associated with at least one storage container 7 by at least one valve 6.
  • the electronics associated with the device 8 is associated with valve 6, becoming fixed and conducive to identifying storage container changes.
  • the system for detecting the exchange of pressure fluid storage containers comprises the fact that the impedance measurement unit 1 is associated with the device 8.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La présente invention concerne un procédé et un système de détection de changement de contenants de stockage de fluides sous pression, notamment pour cylindres porteurs de GPL, mais non limités à ce type d'application Ledit procédé et ledit système permettent de détecter si un changement de contenants de stockage de fluides a eu lieu à partir de l'impédance du contenant de stockage auquel est relié le système, le profil de mise en oeuvre du changement pouvant également être vérifé, autrement dit, si le changement a été effectué à mains nues ou avec des mains revêtues de gants en matière diélectrique.
PCT/BR2022/050420 2021-12-21 2022-11-01 Procédé et système de détection de changement de contenants de stockage de fluides sous pression Ceased WO2023115179A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102021025978-7A BR102021025978A2 (pt) 2021-12-21 Método e sistema de detecção de troca de recipientes armazenadores de fluidos sob pressão
BR1020210259787 2021-12-21

Publications (1)

Publication Number Publication Date
WO2023115179A1 true WO2023115179A1 (fr) 2023-06-29

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Application Number Title Priority Date Filing Date
PCT/BR2022/050420 Ceased WO2023115179A1 (fr) 2021-12-21 2022-11-01 Procédé et système de détection de changement de contenants de stockage de fluides sous pression

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Country Link
WO (1) WO2023115179A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040084145A (ko) * 2003-03-26 2004-10-06 주식회사 델로스테크놀로지 위치엔코딩 자기액면측정기를 활용한 압축용기의잔량측정장치
GB2486018A (en) * 2010-12-02 2012-06-06 Bedford Hospital Nhs Trust Apparatus for monitoring depletion and movement of a medical gas supply
WO2014096472A1 (fr) * 2012-12-20 2014-06-26 Enrique Puerta Blanco Sonde pour déterminer le niveau de la phase liquide de gaz de pétrole liquéfiés et d'autres gaz liquéfiés, conditionnés en bouteilles sous pression
CN105157788A (zh) * 2015-05-07 2015-12-16 四川科强电子技术有限责任公司 检测液压式cng加气子站“溢油”的高速高压液位计
CN210739968U (zh) * 2019-09-17 2020-06-12 中国特种设备检测研究院 一种便携式lng气瓶测试仪
CN214189297U (zh) * 2020-11-26 2021-09-14 长春致远新能源装备股份有限公司 汽车用lng气瓶用新材料防过充装置结构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040084145A (ko) * 2003-03-26 2004-10-06 주식회사 델로스테크놀로지 위치엔코딩 자기액면측정기를 활용한 압축용기의잔량측정장치
GB2486018A (en) * 2010-12-02 2012-06-06 Bedford Hospital Nhs Trust Apparatus for monitoring depletion and movement of a medical gas supply
WO2014096472A1 (fr) * 2012-12-20 2014-06-26 Enrique Puerta Blanco Sonde pour déterminer le niveau de la phase liquide de gaz de pétrole liquéfiés et d'autres gaz liquéfiés, conditionnés en bouteilles sous pression
CN105157788A (zh) * 2015-05-07 2015-12-16 四川科强电子技术有限责任公司 检测液压式cng加气子站“溢油”的高速高压液位计
CN210739968U (zh) * 2019-09-17 2020-06-12 中国特种设备检测研究院 一种便携式lng气瓶测试仪
CN214189297U (zh) * 2020-11-26 2021-09-14 长春致远新能源装备股份有限公司 汽车用lng气瓶用新材料防过充装置结构

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