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WO2004070259A1 - Dispositif et procede d'inversion de liquide automatique utilisant un vaporisateur - Google Patents

Dispositif et procede d'inversion de liquide automatique utilisant un vaporisateur Download PDF

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Publication number
WO2004070259A1
WO2004070259A1 PCT/KR2004/000234 KR2004000234W WO2004070259A1 WO 2004070259 A1 WO2004070259 A1 WO 2004070259A1 KR 2004000234 W KR2004000234 W KR 2004000234W WO 2004070259 A1 WO2004070259 A1 WO 2004070259A1
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WO
WIPO (PCT)
Prior art keywords
gas
vaporizer
pressure
liquid
gaseous state
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/KR2004/000234
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English (en)
Inventor
Tai-Ho Choi
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Individual
Original Assignee
Individual
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Filing date
Publication date
Priority claimed from KR1020030007585A external-priority patent/KR100596172B1/ko
Priority claimed from KR10-2003-0007587A external-priority patent/KR100513265B1/ko
Priority claimed from KR1020030007586A external-priority patent/KR100596173B1/ko
Application filed by Individual filed Critical Individual
Publication of WO2004070259A1 publication Critical patent/WO2004070259A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
    • 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
    • F17C13/045—Automatic change-over switching assembly for bottled gas systems with two (or more) gas containers
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • F17C2205/0134—Two or more vessels characterised by the presence of fluid connection between vessels
    • F17C2205/0142—Two or more vessels characterised by the presence of fluid connection between vessels bundled in parallel
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0341—Filters
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbon dioxide
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/015—Carbon monoxide
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel

Definitions

  • the present invention relates to an automatic liquid changeover device and method using a vaporizer, in which the flow of gas is regulated based on the measured pressure of gas in a gaseous state exhausted from the vaporizer, thereby achieving safe and rapid changeover of the flow of the gas and rapidly cutting off the flow of the gas.
  • an automatic changeover device serves to receive gas from a plurality of gas containers without interruption even when the gas containers are replaced with new ones, and is used in an area to which it is hard to supply city gas.
  • an automatic liquid changeover device can change the flow of a large or medium quantity of gas in a liquid state and has various advantages, thus being widely used as the automatic changeover device.
  • Fig. 1 is a schematic view of a gas supply system provided with a conventional automatic liquid changeover device.
  • the conventional automatic liquid changeover device 301 is connected to a plurality of gas suppliers having multiple containers (A), thereby selectively cutting off the flow of gas in a liquid state or releasing the cutoff of the flow of the gas.
  • the general gas supply system essentially comprises a vaporizer 303 for converting gas rom a liquid state to a gaseous state, and a pressure regulator 305 for lowering a pressure of the gas in a gaseous state obtained by the vaporization in the vaporizer 303 so as to regulate the pressure in a designated range.
  • the differential pressure used in countries such as Korea where seasonal changes in temperature are highly fluctuated, is approximately 8 ⁇ 9 kg/ en. in summer and approximately 4-5 kg/c ⁇ in winter, the conventional automatic liquid changeover device 301 must be set according to the variation in temperature.
  • the unstable change of the gas flow momentarily reduces a supply amount of the gas, and stops the supply of the gas to consumers continuously consuming a large quantity of the gas. Thereafter, the introduction of gas, which is not burned, into the consumers may cause an explosion hazard.
  • the automatic liquid changeover device is produced as an independent product comprising elements, which are incompatible, thus causing a difficulty in maintenance and requiring experts having technical knowledge and skill.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide an automatic liquid changeover device and method using a vaporizer, in which the flow of supplied gas in the liquid state is changed based on the pressure of gas in a gaseous state obtained by vaporizing the gas in the liquid state by the vaporizer and regulated in a proper range so as to achieve safe and rapid change of the flow of the gas in the liquid state.
  • an automatic liquid changeover device using a vaporizer comprising: a first supply line connected to a first gas supplier; a second supply line connected to a second gas supplier; an exhaust line connected to gas consumers; and the vaporizer connected to the first supply line, the second supply line and exhaust line for vaporizing gas in a liquid state supplied through the first and second supply lines to a gaseous state and exhausting the gas in the gaseous state to the exhaust line, wherein a pressure of the gas in the gaseous state exhausted from the vaporizer to the exhaust line is measured, and the first supply line is opened or closed and the second supply line is closed or opened to be opposite the first supply line based on the measured pressure of the gas in the gaseous state.
  • the automatic liquid changeover device may further comprise pressure measurement means installed on the exhaust line for measuring the pressure of the gas in the gaseous state exhausted to the exhaust line; first switching means installed on the first supply line, and opened or closed in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not more than a lower limit; and second switching means installed on the second supply line, and closed or opened to be opposite to the first switching means in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not more than a lower limit.
  • pressure measurement means installed on the exhaust line for measuring the pressure of the gas in the gaseous state exhausted to the exhaust line
  • first switching means installed on the first supply line, and opened or closed in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not more than a lower limit
  • second switching means installed on the second supply line, and closed or opened to be opposite to the first switching means in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not more than a lower
  • the automatic liquid changeover device may further comprise pressure regulation means installed on the exhaust line between the vaporizer and the pressure measurement means for decreasing the pressure of the gas in the gaseous state exhausted from the vaporizer so that the pressure of the gas in the gaseous state is regulated in a predetermined range.
  • the first and second switching means may be closed in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not less than an upper limit.
  • the automatic liquid changeover device may further comprise third switching means installed on the exhaust line between the pressure measurement means and the gas consumers and closed to cut off the flow of the gas in the gaseous state in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not less than the upper limit.
  • the automatic liquid changeover device may further comprise third switching means installed on the exhaust line between the pressure measurement means and the gas consumers and closed to cut off the flow of the gas in the gaseous state in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not less than the upper limit.
  • the automatic liquid changeover device may further comprise a first stop valve installed on the first supply line between the vaporizer and the first switching means, and manipulated by hand; and a second stop valve installed on the second supply line between the vaporizer and the second switching means, and manipulated by hand.
  • the automatic liquid changeover device may further comprise a first bypass line branched off from the first supply line and then joined again with the first supply line so as to bypass the first switching means and the first stop valve; a third stop valve installed on the first bypass line and manipulated by hand; a second bypass line branched off from the second supply line and then joined again with the second supply line so as to bypass the second switching means and the second stop valve; and a fourth stop valve installed on the second bypass line and manipulated by hand.
  • the automatic liquid changeover device may further comprise a first filter installed on the first supply line between the first switching means and the first gas supplier; and a second filter installed on the second supply line between the second switching means and the second gas supplier.
  • the vaporizer may include an outer container, to which an union line for joining the first supply line and second supply line together and the exhaust line are connected; an inner container installed in the outer container so that the outer surface of the inner container is spaced from the inner surface of the outer container for defining a first space, in which the gas in the liquid state is stored and vaporized, between the inner and outer containers and a second space, which is hermetically sealed, in the inner container; a heater installed in the second space; and water, for transferring heat, heated by the heater and vaporized in the second space, steam obtained by vaporizing said water contacting the inner wall of the inner container and vaporizing the gas in the liquid state contained in the first space.
  • an outer container to which an union line for joining the first supply line and second supply line together and the exhaust line are connected
  • an inner container installed in the outer container so that the outer surface of the inner container is spaced from the inner surface of the outer container for defining a first space, in which the gas in the liquid state is stored and vaporized, between the inner
  • the water for transferring heat may have a quantity, which is completely vaporized by the heater and fills the whole second space.
  • the second space may be hermetically sealed in a vacuum state.
  • the vaporizer may further include internal pressure measurement means for measuring the pressure of the second space; and decompression means for decompressing the pressure of the second space.
  • the vaporizer may include a main body provided with an outlet connected to the exhaust line; a guide chamber connected to the main body so as to communicate with the main body and have the same liquid level as that of the main body, and provided with an inlet connected to a line obtained by combining the first and second supply lines; and shutoff means for closing the first and second switching means in case that the liquid level increases and then closing the third switching means, wherein the vaporizer prevents the not- vaporized gas in the liquid state from flowing out thereof.
  • the shutoff means may include a first float cup installed in the guide chamber and elevated by the gas in the liquid state filling the guide chamber; a magnet installed in the first float cup; a first magnetic sensor installed at a side wall of the guide chamber for operating the first and second switching means when the magnet is close to the first magnetic sensor; and a second magnetic sensor installed above the first magnetic sensor at the side wall of the guide chamber for operating the third switching means when the magnet is close to the second magnetic sensor.
  • the shutoff means may further include a first tension spring provided with one end connected to the inner bottom surface of the guide chamber and the other end connected to the outer bottom surface of the first float cup for providing ascending force to the first float cup.
  • the vaporizer may further include a liquid inflow velocity regulation means including: a float ball installed in the first flat cup, and rising from a designated liquid level prior to the operation of the first magnetic sensor by the gas in the liquid state filling the guide chamber; a shutoff plug connected to the lower portion of the float ball, and rising together with the rise of the float ball to gradually close the inlet; a protrusion installed on a lower part of the side wall of the guide chamber for catching the upper portion of the shutoff plug so as to allow the shutoff plug to rise to a designated height and then to stop the rise of the shutoff plug; and a second tension spring provided with one end connected to the bottom of the guide chamber and the other end connected to the shutoff plug for drawing the shutoff plug downwardly by a designed degree so that the shutoff plug does not rise up to the protrusion, wherein the liquid inflow velocity regulation means serves to gradually close the inlet from a predetermined liquid level set before the first magnetic sensor is operated until the first magnetic sensor is operated.
  • the vaporizer may further include a subsidiary shutoff means including: a second float cup installed in the main body, and rising by the gas in the liquid state when the liquid level of the gas in the liquid state filling the guide chamber is increased more than a liquid level at which the third switching means is closed; a closing disk positioned above the second float cup and rising together with the rise of the second float cup to close the outlet of the main body; a guide rod for connecting the closing disk to the second float cup; a guide member installed in the main body and having an opening into which the guide rod is inserted for guiding the vertical movement of the guide rod; a vertical segment vertically installed under the lower portion of the guide member; a horizontal segment provided with a central portion rotatably connected to the lower portion of the vertical segment and one end connected to the guide rod such that the end of the horizontal segment vertically moves in a designated range; and a balance poise installed at the other end of the horizontal segment for providing a designated degree of ascending force to the second float cup, wherein the subsidiary shutoff means including:
  • the gas may be one selected from the group consisting of LPG, Cl 2 , NH 3 , CO 2 , CO and H 2 CO 3 .
  • an automatic liquid changeover device using a vaporizer comprising: a first supply line connected to a first gas supplier; a second supply line connected to a second gas supplier; an exhaust line connected to gas consumers; the vaporizer connected to the first supply line, the second supply line and exhaust line for vaporizing gas in a liquid state supplied through the first and second supply lines to a gaseous state and exhausting the gas in the gaseous state to the exhaust line; pressure measurement means installed on the exhaust line for measuring the pressure of the gas in the gaseous state exhausted to the exhaust line; pressure regulation means installed on the exhaust line between the vaporizer and the pressure measurement means for decreasing the pressure of the gas in the gaseous state exhausted from the vaporizer so that the pressure of the gas in the gaseous state is regulated in a predetermined range; first switching means installed on the first supply line, and opened or closed in case that the pressure of the gas in the gaseous state measured by the pressure measurement means is not more than a lower limit; second switching means
  • an automatic liquid changeover method using a vaporizer in which a pressure of gas in the gaseous state obtained by vaporizing gas in a liquid state by the vaporizer is measured, and the gas in the liquid state is supplied alternately from a first gas supplier and a second gas supplier to the vaporizer based on the measured pressure of the gas in the gaseous state.
  • the automatic liquid changeover method may comprise the steps of: (a) supplying the gas in the liquid state from one of the first and second gas suppliers to the vaporizer; (b) vaporizing the gas in the liquid state supplied to the vaporizer to a gaseous state; (c) exhausting the gas in the gaseous state obtained by the vaporizing the gas in the liquid state by the vaporizer; (d) measuring a pressure of the gas in the gaseous state exhausted from the vaporizer; and (e) changing the flow of the gas in the liquid state by cutting the connection between the vaporizer and one of the first and second gas suppliers, supplying the gas in the liquid state to the vaporizer, and achieving the connection between the vaporizer and the other one of the first and second gas suppliers, in case that the pressure of the gas in the gaseous state measured in step (d) is not more than a predetermined lower limit.
  • the automatic liquid changeover method may further comprise the step of (f) regulating the pressure of the gas in the gaseous state exhausted from the vaporizer in a predetermined range by decreasing the pressure of the gas in the gaseous state.
  • the automatic liquid changeover method may further comprise the step of (g) cutting off the supply of the gas in the liquid state from the gas suppliers in case that the pressure of the gas in the gaseous state measured in step (d) is not less than a predetermined upper limit.
  • the automatic liquid changeover method may further comprise the step of (h) cutting off the outflow of the gas in the gaseous state exhausted from the vaporizer in case that the pressure of the gas in the gaseous state measured in step (d) is not less than a predetermined upper limit.
  • the automatic liquid changeover method may further comprise the step of (i) filtering the gas in the liquid state by removing impurities from the gas in the liquid state supplied from the first and second gas suppliers to the vaporizer.
  • Fig. 1 is a schematic view of a gas supply system provided with a conventional automatic liquid changeover device
  • Fig. 2 is a schematic view of an automatic liquid changeover device in an operating state using a vaporizer in accordance with the present invention
  • Fig. 3 is a block diagram of the automatic liquid changeover device in accordance with the present invention.
  • Fig. 4 is a block diagram of the automatic liquid changeover device of Fig. 3 comprising elements for achieving manual changeover in an emergency;
  • Fig. 5 is a sectional view of a vaporizer employing a steam heating method in accordance with the present invention
  • Fig. 6 is a sectional view of the vaporizer of Fig. 5 in an operating state
  • Fig. 7 is a sectional view of a vaporizer employing a liquid outflow prevention structure in accordance with the present invention.
  • Fig. 8 is a schematic view illustrating constitution and operation of a liquid inflow velocity regulation means in accordance with the present invention.
  • Fig. 9 is a partial sectional view of a subsidiary shutoff means of the vaporizer of the automatic liquid changeover device in accordance with the present invention.
  • Fig. 10 is a schematic view of the subsidiary shutoff means of Fig. 9 in an operating state
  • Fig. 11 is a flow chart illustrating operation of the vaporizer, for preventing the gas from flowing out, of the automatic liquid changeover device in accordance with the present invention.
  • Fig. 12 is a flow chart illustrating an automatic liquid changeover method in accordance with the present invention.
  • Fig. 2 is a schematic view of an automatic liquid changeover device in an operating state using a vaporizer in accordance with the present invention.
  • the automatic liquid changeover device is connected to a plurality of gas suppliers having multiple gas containers, and is generally connected to two gas suppliers including a first gas supplier (A) and a second gas supplier (B).
  • the automatic liquid changeover device 100 of the present invention comprises a vaporizer positioned therein, thus being simply connected to the gas suppliers without requiring a process for connecting the automatic liquid changeover device to a separate vaporizer.
  • the automatic liquid changeover device 100 of the present invention changes the flow of supplied gas in a liquid state gas based on the pressure of gas in a gaseous state obtained by vaporizing the gas in the liquid state and properly regulated by the vaporizer, thereby achieving stable and rapid changeover of the flow of the supplied gas, and rapidly cutting the flow of the gas in case that the gas has an excessively abnormal pressure.
  • Fig. 3 is a block diagram of the automatic liquid changeover device in accordance with the present invention.
  • the automatic liquid changeover device of the present invention comprises a first supply line 51 connected to the first gas supplier, a second supply line 53 connected to the second gas supplier, a vaporizer 10, a pressure regulation means 3, a pressure measurement means 5, a first switching means 7, and a second switching means 9.
  • the vaporizer 10 is a conventional type for vaporizing gas from a liquid state to a gaseous state by means of a heating medium.
  • the vaporizer 10 is connected to the first supply line 51 and the second supply line 53, thus receiving the gas in the liquid state and vaporizing the gas in the liquid state into a gaseous state.
  • the vaporizer 10 is connected to an exhaust line 55, thus exhausting the vaporized gas in the gaseous state to the exhaust line 55.
  • Each of the first supply line 51, the second supply line 53 and the exhaust line 55 connected to the vaporizer 10 is connected to the first gas supplier and the second gas supplier through transmission lines (not shown).
  • the gas includes one selected from the group consisting of LPG, Cl , NH 3 , CO , CO and H CO 3 , which are widely used by shops or companies, but is not limited thereto.
  • the automatic liquid changeover device of the present invention employs one of all kinds of gas, unlimitedly.
  • the pressure regulation means 3 is installed on the exhaust line 55, and decreases the pressure of the gas in the gaseous state exhausted from the vaporizer 10 so as to regulate the pressure of the gas in the gaseous state in a predetermined range.
  • a conventional pressure regulator is used as the pressure regulation means 3.
  • the pressure regulation means 3 regulate the pressure of the gas in the gaseous state exhausted from the vaporizer 10 in a range appropriate for use by the gas suppliers.
  • the pressure measurement means 5 is installed on the exhaust line 55 disposed at an outlet of the pressure regulation means 3, and measures the pressure of the gas passed through the pressure regulation means 3.
  • the first switching means 7 is installed on the first supply line 51 connecting the first gas supplier and the vaporizer 10.
  • the first switching means 7 is opened or closed when the pressure of the gas in the gaseous state measured by the pressure measurement means 5 is not more than a lower limit. «
  • the second switching means 9 is installed on the second supply line 53 connecting the second gas supplier and the vaporizer 10.
  • the second switching means 9 is opened or closed in opposition to the opening or closing of the first switching means 7 when the pressure of the gas in the gaseous state measured by the pressure measurement means 5 is not more than the lower limit.
  • the first switching means 7 and the second switching means 9 are opened or closed in opposition to each other based on the pressure measured by the pressure measurement means 5, thus allowing the gas to be alternately supplied from the first gas supplier or the second gas supplier.
  • the inner pressures in the gas containers in the first gas supplier are decreased, and the pressure of the gas in the gaseous state measured by the pressure measurement means 5 is gradually decreased and then reaches the lower limit.
  • the opened first switching means 7 is momentarily closed and the closed second switching means 9 is opened.
  • the supply of the gas in the liquid state of the first gas supplier is cut off, and the gas in the liquid state of the second gas supplier is supplied to the vaporizer 10.
  • the gas containers in the first gas supplier completely cut off by the first switching means 7 are replaced with new gas containers, which are filled with gas, thus preparing for later gas supply.
  • the automatic liquid changeover device of the present invention properly controls the flow of supplied gas by means of corresponding operations of the pressure measurement means 5, the first switching means 7 and the second switching means 9, thereby receiving alternately from the first gas supplier and the second gas supplier without interrupting the supply of the gas.
  • upper and lower limits of the pressure for allowing the first switching means 7 and the second switching means 9 to be opened or closed are variably predetermined based on variation in peripheral temperature differing from the conventional manner using tensile strength of springs and differential pressure of gas, it is unnecessary to reset the pressure measurement means 5 according to change of seasons or variation in temperature.
  • first switching means 7 and the second switching means 9 are closed when the pressure of the gas in the gaseous state measured by the pressure measurement means 5 is not less than the upper limit.
  • the third switching means 15 together with the first switching means 7 and the second switching means 9 serves to cut off the flow of the gas in the gaseous state on the exhaust line 55 passed through the vaporizer 10, thereby allowing the flow of the gas caused by the abnormal pressure to be thoroughly cut off.
  • a conventional solenoid valve is used as the first, second and third switching means 7, 9 and 15.
  • the vaporizer 10 Accordingly, general components which are obtained in various countries and regions are used as the vaporizer 10, the pressure regulation means 3, the pressure measurement means 5, and the first, second and third switching means 7, 9 and 15 of the automatic liquid changeover device of the present invention, thus allowing the automatic liquid changeover device to be easily produced, maintained and repaired.
  • a first filter 11 and a second filter 13 for removing foreign substances from the gas in the liquid state are respectively installed on the first and second supply lines 51 and 53 disposed at inlets of the first switching means 7 and the second switching means 9.
  • first filter 11 and the second filter 13 are installed, it is possible to easily remove tar and various impurities, which are not eliminated during a refinement process, from the gas in the liquid state.
  • the vaporizer also serves to remove impurities from the gas in the liquid state, the gas in the liquid state is more effectively refined using the first and second filters 11 and 13.
  • the above foreign substances are deposited on various apparatuses, thus causing errors in operating the apparatuses and fine imbalance in gas pressures, and obstructing fine measurement of the pressure of the gas and effective control of the flow of the gas.
  • the automatic liquid changeover device of the present invention is precisely operated without causing problems due to the foreign substances in countries employing poor refining techniques.
  • Fig. 4 is a block diagram of the automatic liquid changeover device of Fig. 3 comprising elements for achieving manual changeover in an emergency.
  • a first stop valve 17 manipulated by hand is installed on the first supply line 51 disposed between the vaporizer 1 and the first switching means 7, and a second stop valve 19 manipulated by hand is installed on the second supply line 53 disposed between the vaporizer 1 and the second switching means 9.
  • a first bypass line 21 is branched off from the first supply line 51 and is then joined again with the first supply line 51 so as to bypass the first switching means 7 and the first stop valve 17, and a third stop valve 25 manipulated by hand is installed on the first bypass line 21.
  • a second bypass line 23 is branched off from the second supply line 53 and is then joined again with the second supply line 53 so as to bypass the second switching means 9 and the second stop valve 19, and a fourth stop valve 27 manipulated by hand is installed on the second bypass line 23.
  • the first stop valve 17 and the third stop valve 25 serve to open or close the first supply line 51 in substitute for the first switching means 7.
  • the first stop valve 17 is substituted for the first switching means 7 when the first switching means 7 in an opened state is inoperable
  • the third stop valve 25 is substituted for the first switching means 7 when the first switching means 7 in a closed state is inoperable.
  • the second stop valve 19 and the fourth stop valve 27 serve to open or close the second supply line 53 in substitute for the second switching means 9.
  • the second stop valve 19 is substituted for the second switching means 9 when the second switching means 9 in an opened state is inoperable
  • the fourth stop valve 27 is substituted for the second switching means 9 when the second switching means 9 in a closed state is inoperable.
  • a fifth stop valve 29 is installed on the exhaust line 55 disposed between the vaporizer 1 and the pressure regulation means 3, and serves to manually cut off the flow of the gas in the gaseous state transferred through the exhaust line 55.
  • the automatic liquid changeover method of the present invention comprises the steps of (a) supplying gas in a liquid state, (b) vaporizing the gas in the liquid state, (c) exhausting gas in a gaseous state, (d) regulating pressure, (e) measuring the pressure, (f) changing the flow of the gas in the gaseous state, (g) cutting off the supply of the gas in the liquid state, and (h) cutting off the exhaust of the gas in the gaseous state.
  • step (a) when the first and second switching means 7 and 9 are closed and then the second switching means 7 is opened, the gas in the liquid state of the first gas supplier is supplied into the vaporizer 10 through the first supply line 51 (SI 01).
  • step (b) the gas in the liquid state supplied into the vaporizer 10 is vaporized into a gaseous state by the vaporizer 10, and then in step (c), the gas in the gaseous state is exhausted to the exhaust line 55 (SI 02).
  • step (d) the gas in the gaseous state exhausted from the vaporizer 10 passes through the pressure regulation means 3.
  • the pressure regulation means 3 decreases the pressure of the gas in the gaseous state so that the pressure is regulated in a predetermined range appropriate for use by the gas consumers.
  • step (e) the pressure of the gas in the gaseous state transferred through the exhaust line 55 is measured by the pressure measurement means 5 (SI 03).
  • step (f) in case that the pressure measured by the pressure measurement means 5 is in a predetermined range, the first switching means 7 and the second switching means 9 maintain their opened or closed states, and then in case that the gas in the first gas supplier is completely vanished so that the pressure measured by the pressure measurement means 5 is lower than the lower limit, the opened first switching means 7 is momentarily closed and the closed second switching means 9 is momentarily opened, thereby supplying gas in a liquid state of the second gas supplier into the vaporizer 10 (SI 06).
  • step (f) In case that the pressure of the supplied gas in step (f) is suddenly increased so that the pressure measured by the pressure measurement means 5 is not less than the upper limit, the opened one out of the first switching means 7 and the second switching means 9 is closed (SI 12).
  • step (h) simultaneously with step (g), the third switching means 15 installed on the exhaust line 55 cuts off the flow of the gas, thereby cutting off the flow of the gas in the liquid state supplied from the first and second gas suppliers and the flow of the gas in the gaseous state transferred to the gas consumers (SI 12).
  • the automatic liquid changeover method of the present invention further comprises a step of filtering the gas in the liquid state by means of the filters 11 and 13 for removing impurities from the gas in the liquid state, thus supplying high-purity gas in a liquid state to the vaporizer 10.
  • the vaporizer 10 used in the automatic liquid changeover device of the present invention may employ a steam heating method.
  • the vaporizer 10 employing the steam heating method will be described in detail.
  • Fig. 5 is a sectional view of the vaporizer employing a steam heating method in accordance with the present invention.
  • Fig. 6 is a sectional view of the vaporizer of Fig. 5 in an operating state.
  • the vaporizer 10 employing the steam heating method includes an outer container 101, an inner container 103, a heater 105, and water 107 filling the inner container 103 for transferring heat.
  • the exhaust line 55 for exhausting the gas in the gaseous state from the outer container 101 therethrough and a union line 109 for introducing the gas in the liquid state into the outer container 101 therethrough are connected to the outer container 101.
  • the gas in the liquid state is supplied to the outer container 101, and the gas in the gaseous state obtained by vaporizing the gas in the liquid state is transferred to the gas consumers through the exhaust line 55.
  • An outlet 123 connected to the exhaust line 55 for exhausting the gas in the gaseous state obtained by vaporizing the gas in the liquid state is formed through an upper portion of the outer container 101.
  • a liquid outflow prevention device 125 for preventing the gas in the liquid state, which is not vaporized, from filling up the outer container 101 and flowing out through the outlet 123 is installed at the upper portion of the outer container 101.
  • the liquid outflow prevention device 125 includes a float ball floating on the gas in the liquid state filling up the outer container 101, and a closing disk connected to an upper portion of the float ball for closing the outlet 123 when the level of the gas in the liquid state is more than a predetermined level. Detailed descriptions of the float ball and the closing disk of the liquid outflow prevention device 125 will be omitted.
  • the inner container 103 is positioned in the outer container 101 so that an outer surface of the inner container 103 is separated from an inner surface of the outer container 101 by a designated distance, thereby defining a first space 113 therebetween.
  • the first space 113 serves to retain the gas in the liquid state before the vaporization for a designated time and to heat the gas in the liquid state retained therein.
  • a second space 115 which is hermetically sealed, is formed in the inner container 103.
  • connection portions hermetically seal the first space 113 and the second space 115.
  • the inner container 103 is made of a material, which stands up to a predetermined pressure by a predetermined steam pressure and has corrosion resistance and heat resistance against the gas and the water 107 for transferring heat.
  • the material of the inner container 104 is stainless steel having strength with a designated value or more and excellent corrosion and heat resistance.
  • the inner container 104 may be made of other materials, which satisfy the above requirements.
  • the heater 105 is installed in the second space 115 of the inner container 103.
  • the heater 105 is installed in the hermetically-sealed second space 115, it is possible to prevent the gas in the liquid or gaseous state from directly contacting an outer surface at a high-temperature of the heater 105, thus preventing an explosion hazard.
  • a designated amount of the water 107 fills the second space 115.
  • the water 107 is heated by the heater 105, and vaporized in the second space 115. Steam obtained by vaporizing the water 107 fills the second space 115, and contacts the inner wall of the inner container 103.
  • the steam obtained from the water 107 transfers heat generated from the heater 105 to the inner container 103.
  • the heat of the heater 105 is transferred to the gas in the liquid state contacting the inner wall of the inner container 103 in the first space 113, thereby vaporizing the gas in the liquid state to a gaseous state.
  • the steam has a temperature much higher than that of warm water and vigorous movement of molecules, thus transferring the heat of the heater 105 to the gas in the liquid state at a high speed and rapidly vaporizing the gas in the liquid state to the gaseous state.
  • the steam has the temperature much higher than that of warm water to rapidly vaporize the gas in the liquid state, the temperature of the steam does not reach a high temperature at which the gas explodes, thus not causing the probability of fire due to the explosion of the gas.
  • the above steam serves to disperse the heat emitted from the heater 105 as long as the heat is transferred to the gas in the liquid state, thereby decreasing the temperature of heat so as not to cause the probability of fire and explosion.
  • the substantial area of the heat transfer surface of the vaporizer 10 of the present invention corresponds to an outer surface of the inner container 103 directly contacting the gas in the liquid state and the gas in the gaseous state.
  • a large heat transfer surface area is obtained in a small installation space.
  • the vaporizer 10 uses the steam obtained by vaporizing the water 107, it is possible to effectively transfer heat at a sufficient temperature to a large heat transfer surface area by means of only a small quantity of the water 107.
  • the vaporizer of the present invention solves the conventional problems, such as increased volume and weight generated by a large quantity of water for transferring a sufficient quantity of the heat.
  • the water 107 in the second space 115 has a designated quantity such that the water 107 is completely vaporized by the heater 105 and the obtained steam completely fills the second space 115.
  • the water 107 filling the second space 115 has a quantity such that the steam obtained by completely vaporizing the water 107 reaches a saturation degree slightly below that of a saturated state.
  • the saturation degree of the steam is regulated so as to be suitable to vaporize the gas in the liquid state in consideration of the properly set pressure and temperature of the second space 115.
  • the second space 115 is hermetically sealed to a vacuum state.
  • the water 107 is effectively vaporized and molecules of the obtained water vigorously move even when the temperature of the second space 115 is not high just after the operation of the heater 105, thereby remarkably improving the speed of the heater 105 for heating the gas in the liquid state.
  • the vacuum state denotes a state having a pressure not more than Okg/c ⁇ .
  • the vaporizer of the present invention further includes an internal pressure measurement means for measuring the pressure of the second space 115, and a decompression means for decompressing the pressure of the second space 115.
  • a pressure gauge which includes a pressure measurement member (not shown) installed in the second space 115 for measuring the pressure of the second space 115 and a pressure indicator 117 for indicating the pressure measured by the pressure measurement member, is used as the internal pressure measurement means.
  • the pressure gauge is one selected from various types of pressure gauges, such as a Macleod gauge, a Pirani gauge and an ionization vacuum gauge, being suitable for measuring a pressure lower than atmospheric pressure by means of variation in thermal conduction and ionization degree according to variation in pressure.
  • a vacuum pump 121 communicated with the second space 115 is used as the decompression means.
  • the internal pressure measurement means measures the pressure of the second space 115 in real time, and the decompression means decompresses the pressure of the second space 115, if necessary.
  • a switching valve 127 for shutting off the second space 115 from the outside is installed on a pipe for connecting the second space 115 and the vacuum pump 121.
  • the switching valve 127 is opened when the vacuum pump 121 is operated to decompress the second space 115, and is closed after the vacuum pump 121 is stopped, thereby completely closing the second space 115.
  • the switching valve 127 is replaced with a check valve.
  • the vaporizer 10 further includes an input/output valve 119 for inputting and outputting gas and liquid into and from the second space 115 in case that the water of the second space 115 is filled up and the second space 115 is excessively decompressed.
  • an input/output valve 119 for inputting and outputting gas and liquid into and from the second space 115 in case that the water of the second space 115 is filled up and the second space 115 is excessively decompressed.
  • the vacuum pump 121 is installed in a factory and an after- sales service vehicle rather than in the vaporizer 10 in consideration of the volume, weight and installation cost of the vacuum pump 121.
  • the above vacuum pump 121 serves to decompress the second space 115 to a vacuum state in an initial stage of setting the vaporizer 10 for taking products out of a factory, and then to again decompress the second space 115 when the vacuum state of the second space ,115 is broken during the use of the vaporizer 10.
  • the input/output valve 119 is opened so that the water 107 fills the second space 115 formed in the inner container 103.
  • the water 107 in the second space 115 has a designated quantity such that the steam obtained by completely vaporizing the water 107 fills the whole second space 115.
  • the vacuum pump 121 is operated to gradually decompress the second space 115.
  • the union line 109 is opened so that the gas in the liquid state is supplied to the vaporizer 10 and power is applied to the heater 105 installed in the first space 113.
  • the gas in the liquid state fills up the first space 113 formed in the outer container 101.
  • the water 107 in the second space 115 in the vacuum state obtained by emitting the heat from the heater 105 is vaporized at a high speed, and the obtained steam fills the second space 115.
  • the heater 105 is regulated so as to maintain the above temperature.
  • the vaporizer used in the automatic liquid changeover device of the present invention may have an outflow prevention structure.
  • the vaporizer employing the liquid outflow prevention structure will be described in detail.
  • Fig. 7 is a sectional view of a vaporizer employing an outflow prevention structure in accordance with the present invention.
  • the vaporizer 20 includes a main body 201, a guide chamber 211, and a shutoff means for opening and closing the first, second and third switching means 7, 9 and 15.
  • the main body 201 is bottle-shaped, and includes at its upper portion an outlet 203 or a cap provided with the outlet 203.
  • the gas in the liquid state fills the main body 201, and is vaporized into a gaseous state.
  • the gas in the gaseous state floats and flows out through the outlet 203 of the main body 201.
  • the exhaust line 55 is connected to the outlet 203 of the main body 201, and is connected to gas consumers.
  • a lower part of the guide chamber 211 is connected to the main body 201 such that the guide chamber 211 and the main body 201 communicate the gases in the liquid and gaseous states with each other.
  • the guide chamber 211 has a liquid level the same as that of the gas in the liquid state filling up the main body 201.
  • An upper part of the guide chamber 211 is also connected to the main body 201 such that the upper part of the guide chamber 211 communicates with the main body 201.
  • the air pressure in the upper area of the main body 201 prevents the gas in the liquid state from filling up the guide chamber 211.
  • a union line 209 is connected to an inlet 205 of the guide chamber 211 so that the gas in the liquid state from the gas suppliers is introduced into the main body 201.
  • the first switching means 7 and the second switching means 9 are installed on the union line 209 such that they cut off the flow of the gas in the liquid state.
  • the first switching means 7 and the second switching means 9 are interlocked with the shutoff means.
  • a solenoid valve is used as the first and second switching means 7 and 9 so that they are opened and closed by an electrical signal supplied from the shutoff means.
  • the third switching means 15 is installed on the exhaust line 55 such that it cuts off the flow of the gas in the liquid state.
  • the third switching means 15 is interlocked with the shutoff means.
  • a solenoid valve is used as the third switching means 15 so that it is opened and closed by an electrical signal supplied from the shutoff means.
  • shutoff means serves to momentarily close the first switching means 7, the second switching means 9 and the third switching means 15.
  • the shutoff means includes a first float cup 217, a magnet 219, a first magnetic sensor 221, and a second magnetic sensor 223.
  • the first float cup 217 is installed in the guide chamber 211, and rises as the gas in the liquid state fills the guide chamber 211.
  • the first float cup 217 has a cylindrical shape provided with an opened lower end, and is not broken by high pressure.
  • the first float cup 217 is guided by the inner wall of the guide chamber 211 without a guide means, thereby vertically moving without shaking.
  • the magnet 219 is installed in the first float cup 217, and rises together with the rise of the first float cup 217 due to the gas in the liquid state filling the guide chamber 211.
  • the first magnetic sensor 221 is installed at the side wall of the guide chamber 211, and operates the first switching means 7 and the second switching means 9 when the magnet 219 is close to the first magnetic sensor 221.
  • the first magnetic sensor 221 is installed at a height corresponding to the height of the magnetic 219 when the liquid level reaches 70%, thus being operated when the liquid level reaches 70%.
  • the liquid level denotes a level of the gas in the liquid state filling the main body 201 or the guide chamber 211, and 70% of the liquid level represents that the gas in the liquid state fills the main body 201 to 70% of the height thereof.
  • the first magnetic sensor 221 senses the magnet 219 at the moment when the liquid level reaches 70%, and then transmits, an electrical signal for instructing the opening or closing of the first switching means 7 and the second switching means 9.
  • the first magnetic sensor 221 closes the first switching means 7 and the second switching means 9, and in case that the liquid level decreases and reaches 70%, the first magnetic sensor 221 opens the first switching means 7 and the second switching means 9.
  • the first switching means 7 and the second switching means 9 installed on the union line 209 are closed to cut off the introduction of the gas in the liquid state.
  • the gas in the liquid state filling the main body 201 by the liquid level of 70% is vaporized to gas in the gaseous state and the gas in the gaseous state flows out through the outlet 203. Thereby, the liquid level decreases and is returned to a normal degree.
  • the second magnetic sensor 223 is installed at a height corresponding to the height of the magnetic 219 when the liquid level reaches 85%.
  • the second magnetic sensor 223 senses the magnet 219 at the moment when the liquid level reaches 85%, and then transmits an electrical signal for instructing the opening or closing of the third switching means 15.
  • the second magnetic sensor 223 closes the third switching means 15, and in case that the liquid level decreases and reaches 85%, the second magnetic sensor 223 opens the third switching means 15.
  • the shutoff means serves as a double safety system, which cuts off the introduction of the gas in the liquid state when the liquid level increases up to 70% and cuts off the outflow of the gas in the gaseous state when the liquid level increases up to 85%, which may cause the outflow of the gas.
  • the shutoff means further includes a first tension spring 225 provided with one end connected to the inner bottom surface of the guide chamber 211 and the other end connected to the outer bottom surface of the first float cup 217.
  • the first float cup 217 receives a designated degree of ascending force generated by the elastic force of the first tension spring 225.
  • the first float cup 217 When the first float cup 217 receives the ascending force, the first float cup 217 easily rises even by a small volume of the gas in the liquid state having a low specific gravity.
  • the first tension spring 225 may have various tensile forces. By employing- the first tension spring 225 having various tensile forces, it is possible to properly rise the first float cup 217 using various types of gas in the liquid state having different specific gravities.
  • a drain line 216 is connected to a lower portion of the main body 201 and a drain valve 218 is installed on the drain line 216.
  • Fig. 8 is a schematic view illustrating constitution and operation of a liquid inflow velocity regulation means in accordance with the present invention.
  • the liquid inflow velocity regulation means of the present invention includes a float ball 227, a shutoff plug 229, a protrusion 231 for catching the shutoff plug 229, and a second tension spring 233.
  • the float ball 227 is installed in the first flat cup 217, and rises from the liquid level of 50% prior to the operation of the first magnetic sensor 221 as the gas in the liquid state fills up the guide chamber 211.
  • the shutoff plug 229 is connected to the lower portion of the float ball 227, and rises together with the rise of the float ball 227 to gradually close the inlet 205.
  • the protrusion 231 is installed on a lower part of the side wall of the guide chamber 211, and serves to catch the upper portion of the shutoff plug 229 so as to allow the shutoff plug 229 to rise to a designated height and then to stop the rise of the shutoff plug 229.
  • the protrusion 231 is formed along the circumference of the lower part of the side wall of the guide chamber 211.
  • the second tension spring 233 is provided.
  • the second tension spring 233 is provided with one end connected to the bottom of the guide chamber 211 and the other end connected to the shutoff plug 229, and draws the shutoff plug 229 downwardly by a designed degree so that the shutoff plug 229 does not rise up to the protrusion 231.
  • the second tension spring 233 draws the shutoff plug 229 downwardly by a weak degree at an initial stage, then draws the shutoff plug 229 downwardly by a strong degree according to the rise of the float ball 227. Just before the shutoff plug 229 reaches the protrusion 231, the tension force of the second tension spring 233 is completely balanced with the ascending force of the shutoff plug 229.
  • the second tension spring 233 has a proper tension force according to the kinds of the gas in the liquid state.
  • the liquid inflow velocity regulation means which includes the float ball 227, the shutoff plug 229, the protrusion 231 and the second tension spring 233, gradually decrease the inflow velocity of the gas in the liquid state from the liquid level of 50%, thereby regulating the liquid level.
  • the liquid inflow velocity regulation means allows the gas in the liquid state to flow into the main body 201 at a high speed when the gas in the liquid state in the main body 201 is rapidly vaporized so that the liquid level of the main body 201 is decreased, and allows the gas in the liquid state to flow into the main body 201 at a low speed when the gas in the liquid state in the main body 201 is slowly vaporized so that the liquid level of the main body is increased.
  • the vaporizer of the automatic liquid changeover device of the present invention further includes a subsidiary shutoff means operated for preventing the outflow of the gas when the liquid level increases more than a level at which the third switching means 15 is closed.
  • Fig. 9 is a partial sectional view of a subsidiary shutoff means of the vaporizer of the automatic liquid changeover device in accordance with the present invention.
  • the subsidiary shutoff means includes a second float cup 235, a closing disk 237, a guide rod 239, a guide member 241, a vertical segment 243, a horizontal segment 245, and a balance poise 247.
  • the second float cup 235 is installed in the main body 201, and rises by the gas in the liquid state when the liquid level of the gas in the liquid state filling the guide chamber 211 is increased more than a level at which the third switching means 15 is closed.
  • the second float cup 235 has a cylindrical shape provided with an opened lower end, and is not deformed by the high pressure in the main body 201.
  • the closing disk 237 is positioned above the second float cup 235 by means of the guide rod 239.
  • the closing disk 237 rises together with the rise of the second float cup 235, and closes the outlet 203 of the main body 201. For this reason, the closing disk 237 has a shape correspondingly fitted to the shape of the outlet 203.
  • an O-ring serving as a sealing member, is installed at the circumference of the closing disk 237, thereby completely preventing the outflow of the gas when the closing disk 237 is fitted to the outlet 203.
  • the closing disk 237 completely blocks the outlet 203 when the liquid level of the gas in the liquid state in the main body 201 reaches 90%.
  • the guide member 241 is installed in the main body 201, and has an opening into which the guide rod 239 is inserted, thereby serving to guide the vertical movement of the guide rod 239.
  • the vertical segment 243 is vertically installed under the lower portion of the guide member 241.
  • the central portion of the horizontal segment 245 is rotatably connected to the lower portion of the vertical segment 243 such that both ends of the horizontal segment 245 alternately moves vertically in a seesaw-structure.
  • One end of the horizontal segment 245 is connected to the guide rod 239 such that the end of the horizontal segment 245 vertically moves in a designated range.
  • a long hole 249 is formed through the end of the horizontal segment 245, and a connection member 250 inserted into the long hole 249 is formed on the guide rod 239.
  • the balance poise 247 is installed at the other end of the horizontal segment 245, and provides a designated degree of ascending force to the second float cup 235.
  • the balance poise 247 supplies a designated degree of the ascending force to the second float cup 235, the second float cup 235 easily rises even by a small volume of the gas in the liquid state having a low specific gravity.
  • the balance poise 247 has a heavy weight as long as the second float cup 235 does not rise due to the ascending force of the gas in the gaseous state, thereby maximizing the ascending force of the second float cup 235.
  • the closing disk 237 closes the outlet 203 by means of the ascending force of the second float cup 235.
  • the above constitution of the subsidiary shutoff means solves the problems, such as the preparation of a large-sized float ball or a plurality of float balls, caused by a conventional method using only the buoyancy of the gas in the liquid state for raising the float ball, thereby reducing the whole size of the subsidiary shutoff means.
  • the balance poise may have various weights.
  • the balance poise 247 can be replaced with a new one having a different weight according to the kinds of the gas in the liquid state having different specific gravities.
  • the subsidiary shutoff means is applied to various kinds of the gas in the liquid state by replacing the balance poise 247 with a new one without replacing other parts.
  • Fig. 10 is a schematic view of the subsidiary shutoff means of Fig. 9 in an operating state.
  • the closing disk completely closes the outlet 203 from when the liquid level in the main body 201 reaches 90% by the rise of the second float cup 235, and maintains the closing state of the outlet 203 as long as the liquid level in the main body 201 does not decrease.
  • the balance poise 247 continuously supplies the ascending force to the second float cup 235 and the closing disk 237.
  • Fig. 11 is a flow chart illustrating operation of the vaporizer, for preventing the outflow of the gas, of the automatic liquid changeover device in accordance with the present invention.
  • the vaporizer for preventing the gas from flowing out in accordance with the present invention starts the operation of a liquid outflow prevention system through multiple steps, when the liquid level of the gas in the liquid state filling the main body 201 reaches 50%, 70%, 85% and 90%.
  • the liquid inflow velocity regulation means is operated to gradually decrease the inflow velocity of the gas in the liquid state, and the inflow velocity of the gas in the liquid state is minimized to close to 70% of the liquid level.
  • the liquid inflow velocity regulation means balances the inflow velocity of the gas in the liquid state and vaporization velocity of the liquid, thereby preventing the liquid level from increasing.
  • the first magnetic sensor 221 of the shutoff means is operated to close the first switching means 7 and the second switching means 9, which are installed on the union line 209.
  • the introduction of the gas in the liquid state is completely cut off.
  • the introduced gas in the liquid state is vaporized into a gaseous state, and the gas in the gaseous state flows out through the outlet 203 and is continuously supplied to gas consumers.
  • the liquid level of the gas in the liquid state in the main body 201 decreases, and is rapidly returned to 70%. Then, the first magnetic sensor 221 is operated to open the first switching means 7 and the second switching means 9.
  • the first magnetic sensor 221 repeats the closing and opening of the first switching means 7 and the second switching means 9, thereby maintaining the liquid level to 70%.
  • the first magnetic sensor 221 of the shutoff means is operated to close the third switching means 15 installed on the exhaust line 55.
  • the first magnetic sensor 221, the second magnetic sensor 223, the first switching means 7 and the second switching means 9 of the shutoff means, which is electrically operated are inoperable.
  • the subsidiary shutoff means which is mechanically operated, is operated to completely close the outlet 203 when the liquid level reaches 90%, thereby preventing the system from being damaged or exploded due to the outflow of the gas.
  • the present invention provides an automatic liquid changeover device using a vaporizer, in which the flow of supplied gas in a liquid state is changed based on the pressure of the gas in a gaseous state obtained by the vaporization in the vaporizer and regulated to a proper degree, thus achieving safe and rapid changeover of the flow of the gas.
  • the automatic liquid changeover device of the present invention rapidly cuts off the flow of the gas when the pressure of the gas is suddenly and abnormally high, thus preventing the probability of accidents generated by sudden excessive supply of the gas.
  • the automatic liquid changeover device of the present invention does not require an additional setting step according to variation in peripheral temperature, thus eliminating inconvenience caused by the resetting according to change of seasons.
  • the automatic liquid changeover device of the present invention employs conventional products, which are widely used and compatible, thus reducing production cost and being easily maintained and repaired at any country.
  • the automatic liquid changeover device of the present invention measures the pressure of the gas after the vaporizer removes tar and impurities of the gas, thus being usable regardless of variation in development of refining techniques in countries.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Cette invention concerne un dispositif et un procédé d'inversion de liquide automatique utilisant un vaporisateur, lequel procédé consiste à mesurer une pression de gaz à l'état gazeux obtenu par la vaporisation de gaz à l'état liquide par le vaporisateur et diffusé par le vaporisateur et à modifier l'écoulement du gaz acheminé à l'état liquide sur la base de la pression mesurée du gaz à l'état gazeux, ce qui permet d'obtenir une inversion rapide et sans danger de l'écoulement de gaz et d'interrompre rapidement l'écoulement de gaz en cas de pression excessivement anormale du gaz.
PCT/KR2004/000234 2003-02-06 2004-02-06 Dispositif et procede d'inversion de liquide automatique utilisant un vaporisateur Ceased WO2004070259A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2003-0007587 2003-02-06
KR10-2003-0007585 2003-02-06
KR1020030007585A KR100596172B1 (ko) 2003-02-06 2003-02-06 증기를 이용하여 가열하는 기화기
KR10-2003-0007586 2003-02-06
KR10-2003-0007587A KR100513265B1 (ko) 2003-02-06 2003-02-06 액유출 방지용 기화기
KR1020030007586A KR100596173B1 (ko) 2003-02-06 2003-02-06 기화기를 사용한 액자동 절체장치

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WO2004070259A1 true WO2004070259A1 (fr) 2004-08-19

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009035311A1 (fr) * 2007-09-12 2009-03-19 Aleksejs Safronovs Procédé de compression de carburant gazeux pour alimenter un véhicule et dispositif pour sa mise en application
CN101975296A (zh) * 2010-09-13 2011-02-16 武汉金鼎船舶工程设计有限公司 船用全自动气动快关阀控制装置
EP2041475A4 (fr) * 2006-07-03 2012-03-28 Liquiline As Procédé et système destinés à distribuer des gaz à des consommateurs, et leur utilisation
CN104150431A (zh) * 2013-05-14 2014-11-19 北京北方微电子基地设备工艺研究中心有限责任公司 进气系统及基片处理设备
CN106989269A (zh) * 2017-05-23 2017-07-28 大连百傲化学股份有限公司 一种工业液氯直接用于氯化反应的装置
CN108286650A (zh) * 2017-12-29 2018-07-17 长春汽四环腾达油脂化工有限公司 一种充氨方法
FR3082915A1 (fr) * 2018-06-25 2019-12-27 Clesse Industries Regulateur d’alimentation en gaz
CN113623538A (zh) * 2021-06-15 2021-11-09 浙江海宏气体股份有限公司 一种混合气自动充装方法及其充装设备
CN116678599A (zh) * 2023-06-02 2023-09-01 星奇(上海)半导体有限公司 一种用于液体汽化器综合性能测试的平台及测试方法

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JPH0518498A (ja) * 1991-07-11 1993-01-26 Mitsubishi Cable Ind Ltd 発泡用注入液化ガス供給装置
KR19980065091A (ko) * 1998-06-25 1998-10-07 송진규 가스용기 자동절체장치
JP2001160187A (ja) * 1999-12-03 2001-06-12 Yazaki Corp ガスメータ
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2041475A4 (fr) * 2006-07-03 2012-03-28 Liquiline As Procédé et système destinés à distribuer des gaz à des consommateurs, et leur utilisation
WO2009035311A1 (fr) * 2007-09-12 2009-03-19 Aleksejs Safronovs Procédé de compression de carburant gazeux pour alimenter un véhicule et dispositif pour sa mise en application
US8899279B2 (en) 2007-09-12 2014-12-02 Hygen Sia Method for compressing gaseous fuel for fuelling vehicle and device for implementation thereof
CN101975296A (zh) * 2010-09-13 2011-02-16 武汉金鼎船舶工程设计有限公司 船用全自动气动快关阀控制装置
CN104150431A (zh) * 2013-05-14 2014-11-19 北京北方微电子基地设备工艺研究中心有限责任公司 进气系统及基片处理设备
CN106989269A (zh) * 2017-05-23 2017-07-28 大连百傲化学股份有限公司 一种工业液氯直接用于氯化反应的装置
CN108286650A (zh) * 2017-12-29 2018-07-17 长春汽四环腾达油脂化工有限公司 一种充氨方法
FR3082915A1 (fr) * 2018-06-25 2019-12-27 Clesse Industries Regulateur d’alimentation en gaz
EP3587896A1 (fr) * 2018-06-25 2020-01-01 Clesse Industries Régulateur d'alimentation en gaz
CN113623538A (zh) * 2021-06-15 2021-11-09 浙江海宏气体股份有限公司 一种混合气自动充装方法及其充装设备
CN113623538B (zh) * 2021-06-15 2022-08-09 浙江海宏气体股份有限公司 一种混合气自动充装方法及其充装设备
CN116678599A (zh) * 2023-06-02 2023-09-01 星奇(上海)半导体有限公司 一种用于液体汽化器综合性能测试的平台及测试方法
CN116678599B (zh) * 2023-06-02 2025-12-09 星奇(上海)半导体有限公司 一种用于液体汽化器综合性能测试的平台及测试方法

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