WO2023068920A1 - Système de régulation de niveau de liquide à double soupape - Google Patents

Système de régulation de niveau de liquide à double soupape Download PDF

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Publication number
WO2023068920A1
WO2023068920A1 PCT/MY2021/050123 MY2021050123W WO2023068920A1 WO 2023068920 A1 WO2023068920 A1 WO 2023068920A1 MY 2021050123 W MY2021050123 W MY 2021050123W WO 2023068920 A1 WO2023068920 A1 WO 2023068920A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
liquid
liquid level
dual
regulating system
Prior art date
Application number
PCT/MY2021/050123
Other languages
English (en)
Inventor
Min Chee Kenneth NGUI
Min Fui Tom NGUI
Original Assignee
Ngui Min Chee Kenneth
Ngui Min Fui Tom
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 Ngui Min Chee Kenneth, Ngui Min Fui Tom filed Critical Ngui Min Chee Kenneth
Publication of WO2023068920A1 publication Critical patent/WO2023068920A1/fr

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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
    • F16K21/00—Fluid-delivery valves, e.g. self-closing valves
    • F16K21/04—Self-closing valves, i.e. closing automatically after operation
    • F16K21/18—Self-closing valves, i.e. closing automatically after operation closed when a rising liquid reaches a predetermined level
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
    • F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
    • F16K31/24—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with a transmission with parts linked together from a single float to a single valve
    • F16K31/26—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with a transmission with parts linked together from a single float to a single valve with the valve guided for rectilinear movement and the float attached to a pivoted arm
    • 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
    • G01F23/30—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 floats
    • G01F23/64—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 floats of the free float type without mechanical transmission elements
    • G01F23/66—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 floats of the free float type without mechanical transmission elements using mechanically actuated indicating means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/02—Level control, e.g. controlling quantity of material stored in vessel without auxiliary power

Definitions

  • the present invention relates to a liquid level regulating system, particularly a dual-valve liquid level regulating system for filling a liquid tank.
  • a liquid level regulating system regulates the fluid level in a liquid tank for controlling the flow rate with which the pump delivers liquid to the tank, maintaining the threshold liquid level in the tank.
  • the liquid level regulating system involves using sensors and probes to detect the liquid level in the tank.
  • a sensor and a probe detect that the liquid level has dropped below the threshold level
  • the valve in the liquid tank will be opened for filling and closed again after the desired liquid level is reached. Consequently, frequent opening and closing of the valve and the frequent use of the pump cause the diaphragm seal to wear off quickly results in the pump and valve failure.
  • liquid level regulating systems are operated by electricity as well as electronically via internet of things to monitor the liquid level and control the filling process in real time.
  • electrically or electronically operated liquid level regulating systems lack sustainability and are not cost-effective.
  • US20100236644A1 discloses a valve assembly for controlling fluid flow.
  • the valve assembly includes a first electro-statically actuated valve placed between a first chamber and a second chamber, and a second electro-statically actuated valve placed between the second chamber and a third chamber.
  • the first chamber is connected to an inlet and the third chamber is connected to an outlet.
  • Both the first electro-statically actuated valve and the second electrostatically actuated valve may allow or block fluid communication between the chambers responsive to their respective electrical signal.
  • the valve assembly involves using electricity to control the fluid flow which then incurs high operating expenses.
  • CN100552153C discloses a water-saving double-float valve flushing device composed of an upper and lower valve mechanisms.
  • the first valve mechanism on the upper layer and the second valve mechanism on the lower layer are provided with mutually engaging joints, so that the first valve mechanism on the upper layer and the second valve mechanism on the lower layer are engaged with each other to form a valve flushing device combo.
  • the double float valve flushing device has a limited range of water level control and thus the valves open and close frequently resulting in wear off of the diaphragm seal.
  • FR2719922 discloses a liquid level control device for household appliances.
  • the liquid level control device comprises a solenoid valve configured on the water inlet pipe of the device, wherein a venturi is inserted on the water inlet pipe to accelerate the flow of the liquid.
  • the solenoid valve is an electrically controlled valve. Hence, the solenoid may not work correctly due to lack of power, incorrect voltage and burnt coil.
  • valves and devices of aforesaid prior arts appear to have several disadvantages including cost, environmental sustainability and durability. Accordingly, there is a need to provide a non-electric dual-valve liquid level regulating system that is environmentally friendly, cost-effective and durable for use in filling a liquid tank in domestic and industrial applications.
  • the present invention provides a dual-valve liquid level regulating system for a liquid tank comprising an upper valve, wherein the upper valve comprises an inlet flood chamber, an outlet chamber, an egress control chamber and a float chamber, characterized by a lower valve connected to the upper valve vertically via a connector, the lower valve comprises an inlet flood chamber and a float chamber, a venturi jet disposed in the outlet chamber of the upper valve, and a tube connecting the connector and the venturi jet, wherein liquid in the upper valve, the connector and the lower valve drain when liquid level of the liquid tank drops below the lower valve and causes both the upper and lower valves open to fill the liquid tank, wherein the lower valve closes when liquid of the liquid tank reaches the lower valve and causes liquid in the connector flows to the venturi jet when there is a pressure differential so as to remain the upper valve opens as the liquid level rises above the lower valve until an isobaric pressure is achieved, wherein liquid stops flowing into the liquid tank when
  • Figure 1 shows a diagram of a dual-valve liquid level regulating system (100) in accordance to first embodiment of the present invention
  • Figure 2 shows a diagram of a dual-valve liquid level regulating system (100) in accordance to second embodiment of the present invention
  • Figure 3 shows a diagram of a dual-valve liquid level regulating system (100) in accordance to third embodiment of the present invention
  • Figure 4 shows a diagram of a dual-valve liquid level regulating system (100) in accordance to fourth embodiment of the present invention
  • FIG. 5 shows a diagram of a venturi jet (400) in accordance to an embodiment of the present invention
  • Figure 6 shows a top view of a means for air purging (500) in accordance to an embodiment of the present invention
  • Figure 7 shows a schematic diagram of a dual-valve liquid level regulating system (100) in accordance to the first embodiment of the present invention, when liquid level of the liquid tank drops below the threshold level of the lower valve (300);
  • Figure 8 shows a schematic diagram of a dual-valve liquid level regulating system (100) with liquid flow direction in accordance to the first embodiment of the present invention, when there is a pressure differential within the system (100) in the presence of the venturi jet (400); and
  • Figure 9 shows a schematic diagram of a dual-valve liquid level regulating system (100) in accordance to the first embodiment of the present invention, when an isobaric pressure is achieved within the system (100).
  • compositions or an element or a group of elements are preceded with the transitional phrase “comprising”, it is understood that we also contemplate the same composition, element or group of elements with transitional phrases “consisting of”, “consisting”, “selected from the group of consisting of, “including”, or “is” preceding the recitation of the composition, element or group of elements and vice versa.
  • the present invention provides a mechanically operated dual-valve liquid level regulating system (100) to fill a liquid tank automatically without using electricity.
  • the liquid includes but is not limited to volatile and non-volatile low viscosity liquid.
  • the dualvalve liquid level regulating system (100) comprises an upper valve (200) and a lower valve (300).
  • the upper valve (200) comprises an inlet flood chamber (202), an outlet chamber (204), an egress control chamber (206) and a float chamber (208).
  • the lower valve (300) comprises an inlet flood chamber (302) and a float chamber (304), wherein the lower valve (300) is connected to the upper valve (200) vertically via a connector (102), as shown in Figures 1 to 4.
  • the connector (102) is disposed of between the float chamber (208) of the upper valve (200) and the inlet flood chamber (302) of the lower valve (300), wherein the length of the connector (102) is adjustable to suit desired threshold level below the lower valve (200).
  • the connector (102) and the lower valve (300) drain and consequently trigger opening of both the upper valve (200) and the lower valve (300) to fill the liquid tank.
  • a venturi jet (400) is disposed in the outlet chamber (204) of the upper valve (200).
  • the outlet chamber (204) of the upper valve (200) is further connected with an outlet extension (2040), wherein the venturi jet (400) is disposed in the outlet extension (2040) as part of the outlet chamber (204).
  • the venturi jet (400) is disposed of in the outlet chamber (204) of the upper valve (200), as shown in Figures 2 to 4.
  • the venturi jet (400) is provided to induce a pressure difference within the system (100) so as when the liquid level of the liquid tank rises above the lower valve (300), the lower valve (300) is closed and flooded with the liquid creating high pressure.
  • a tube (104) is provided for connecting the connector (102) and the venturi jet (400), wherein the tube (104) is an external tube which is disposed outside the upper valve (200), as shown in Figures 1 and 2.
  • the tube (104) is integrated within the upper valve (200), as shown in Figures 3 and 4.
  • the liquid in the connector (102) flows to the venturi jet (400) via the tube (104) when there is a pressure differential so as to remain the upper valve (200) opens for filling until an isobaric pressure is achieved, that is when the negative pressure inside the connector (102) is overwhelmed by the liquid ingress flooding the float chamber (208).
  • the filling of the liquid tank stops when the liquid level of the liquid tank reaches the upper valve (200) and causes the upper valve (200) to close.
  • the venturi jet (400) comprises three reducers (402, 404, 406) connected in series, wherein the second reducer (404) is in inverted position having a mouth (408) extended downwardly connecting the tube (104).
  • the venturi jet (400) further comprises a jet tube (410) placed within the first reducer (402) and the second reducer (404), wherein the jet tube (410) is fixed in the first reducer (402) and the second reducer (404) via a gauge clip (412), a sealing clip (414) and a self-locking sleeve (416) to maintain the structural integrity of the venturi jet (400).
  • the tube (104) further provided with a pressure regulator (106) for regulating the pressure in the tube (104).
  • the liquid level regulating system (100) further comprises a downpipe (108) connected to the outlet chamber (204) for smooth drainage by minimizing noise, splashing and turbulence during filling.
  • the downpipe (108) is provided with an atmospheric vent (110) to control the pressure in the downpipe (108) despite the change in liquid level of the liquid tank, as well as preventing pressure impaction in the venturi jet (400). More particularly, the atmospheric vent (110) allows air to flow in during filling and flow out during drawdown for normalizing the pressure in the downpipe (108) to ambient pressure.
  • the float chamber (208) of the upper valve (200) and the float chamber (304) of the lower valve (300) respectively comprises a pair of means for air purging (500) having four openings (502, 504, 506, 508) arranged concentrically, as shown in Figure 6.
  • the four openings (502, 504, 506, 508) act as atmospheric vent for air purging and ingress openings for the flowing of liquid.
  • the four openings comprise a high-level opening (502) and three low-level openings (504, 506, 508), wherein the high-level opening (502) is positioned above the three low-level openings (504, 506, 508) and act as an atmospheric vent for enhancing air purging in the float chambers (208, 304) during filling and drawdown, whereas the three low-level openings (504, 506, 508) act as ingress openings for flowing of liquid into the float chambers (208, 304) during filling and also act as atmospheric vents for enhancing air purging in the float chambers (208, 304) during drawdown.
  • the high-level opening (502) is positioned above the three low-level openings (504, 506, 508) and act as an atmospheric vent for enhancing air purging in the float chambers (208, 304) during filling and drawdown
  • the three low-level openings (504, 506, 508) act as ingress openings for flowing of liquid into the float chambers (208, 304) during filling and also
  • the lower valve (300) position in the liquid tank determines the desired threshold level of the liquid tank to initiate a liquid filling. Assuming the lower valve (300) is placed about 20% of the height of the liquid tank as the desired threshold level. As shown in Figure 7, when liquid level in the liquid tank drops below threshold level of the lower valve (300) or that is below 20% of the height of the liquid tank, the holding liquid in the upper valve (200), connector (102) and lower valve (300) are drained from the lower valve (200) in tandem and thus triggering the upper valve (200) and the lower valve (300) open for filling the liquid tank.
  • the venturi jet (400) can be disposed of in the outlet chamber (204) of the upper valve (200) and the connector (102) is connected to the venturi jet (400) via a tube (104), more particularly connecting to the mouth (408) of the second reducer (404) of the venturi jet (400).
  • the first reducer (402) and third reducer (406) of the venturi jet (400) receive liquid at low-speed flow and high pressure.
  • the constricted section of the first reducer (402) and the second reducer (404) receives liquid at high-speed flow and low pressure. Accordingly, liquid diffused by the venturi jet (400) creates negative pressure behind the venturi jet (400).
  • the low-level openings (504, 506, 508) in the float chamber (208) of the upper valve (208) allows rising liquid to rush into the inlet flood chamber (202) via an opening (2060) in the egress control chamber (206) and thus floods the inlet flood chamber (202).
  • the flooding of the upper valve (200) causes the pressure in the upper valve (200) and the suction pressure induced by the venturi tube (400) to reach an isobaric pressure which then results in the closing of the upper valve (200) and completing the filling process as shown in Figure 9.
  • the addition of lower valve (300) enables the holding of liquid in the connector (102) and thus preventing the upper valve (200) opens during drawdown even as the liquid of the liquid tank drops below the threshold level of the upper valve (200). Accordingly, low frequency of opening and closing the upper valve (200) and infrequent use of the pump is conducive to extending the lifespan of the diaphragm seals and the pump.
  • the mechanically operated dual valve liquid level regulating system (100) of the present invention is a reliable closed-loop system that refills liquid automatically without the need of sensors, probes, electricity and electrical devices. Therefore, it provides a relatively low cost, low maintenance, environmentally friendly solution for both domestic and industrial applications compared to the other conventional liquid level regulating systems.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Float Valves (AREA)

Abstract

La présente invention divulgue un système de régulation de niveau de liquide à double soupape (100) pour un réservoir de liquide comprenant : une soupape supérieure (200) comprenant une chambre d'injection d'entrée (202), une chambre de sortie (204), une chambre de commande de sortie (206) et une chambre à niveau constant (208) ; une soupape inférieure (300) verticalement reliée à la soupape supérieure (200) par l'intermédiaire d'un raccord (102), la soupape inférieure (300) comprenant une chambre d'injection d'entrée (302) et une chambre à niveau constant (304) ; un jet venturi (400) disposé dans la chambre de sortie de la soupape supérieure (200) ; et un tube (104) reliant le raccord (102) et le jet venturi (400).
PCT/MY2021/050123 2021-10-21 2021-12-20 Système de régulation de niveau de liquide à double soupape WO2023068920A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI2021006299 2021-10-21
MYPI2021006299 2021-10-21

Publications (1)

Publication Number Publication Date
WO2023068920A1 true WO2023068920A1 (fr) 2023-04-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566484A (en) * 1984-12-28 1986-01-28 William R. Walters Liquid level control apparatus
US20100071123A1 (en) * 2008-09-24 2010-03-25 David Larsen Automatic water leveler
KR101795426B1 (ko) * 2011-03-16 2017-11-10 코웨이 주식회사 수위조절장치
US20180080206A1 (en) * 2015-03-12 2018-03-22 Fluidmaster, Inc. Vacuum operated valve
EP3339648B1 (fr) * 2016-12-21 2019-07-24 Altop Patents II B.V. Pompe à liquide avec une pompe à air d'amorçage et, entre les deux pompes, une valve actionnée par un flotteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566484A (en) * 1984-12-28 1986-01-28 William R. Walters Liquid level control apparatus
US20100071123A1 (en) * 2008-09-24 2010-03-25 David Larsen Automatic water leveler
KR101795426B1 (ko) * 2011-03-16 2017-11-10 코웨이 주식회사 수위조절장치
US20180080206A1 (en) * 2015-03-12 2018-03-22 Fluidmaster, Inc. Vacuum operated valve
EP3339648B1 (fr) * 2016-12-21 2019-07-24 Altop Patents II B.V. Pompe à liquide avec une pompe à air d'amorçage et, entre les deux pompes, une valve actionnée par un flotteur

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