Classifications

• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
  • G05D16/00—Control of fluid pressure
  • G05D16/04—Control of fluid pressure without auxiliary power
  • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
  • G05D16/103—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the sensing element placed between the inlet and outlet
• • 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
• • 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
  • F17C2205/0323—Valves
• • 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
  • F17C2205/0338—Pressure regulators
• • 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
  • F17C2205/0388—Arrangement of valves, regulators, filters
  • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
• • 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
  • F17C2250/06—Controlling or regulating of parameters as output values
  • F17C2250/0605—Parameters
  • F17C2250/0636—Flow or movement of content

Definitions

• Pressure-reducing valve for supplying pressurized gas into bottle provided with cap
• the invention relates to a pressure-reducing valve for supplying pressurized gas into a bottle provided with a cap, the pressure-reducing valve comprising a body, a piston part, a spring, a flow conduit passing through the pressure-reducing valve, and a closing means that is arranged to throttle or prevent the gas flow through the pressure-reducing valve, the piston part being placed inside the body to move in relation to the body, the piston part being acted upon on one side by a spring force and on the opposite side by the pressure of the pressurized gas against the surface of the piston part, whereupon the piston part is arranged to adjust the flow of the pressurized gas through the pressure-reducing valve, and the spring force determines the output pressure.
• GB 2,122,729 discloses a pressure control device for a beer barrel.
• the pressure control device comprises a valve having a stem that operates as the piston of the valve and that is pressed downwards by a piston.
• the piston is further pressed by a spring.
• the piston When the spring bears down on the piston, the piston further presses the valve stem downwards, so that the pressurized gas can escape from the pressure bottle throttled through the valve.
• the pressure of the gas flowing through the valve lifts the piston upwards, whereupon the valve stem also rises.
• the valve stem is simultaneously lifted also by the gas pressure in the pressure bottle. If the pressure of the gas lifting the piston rises sufficiently high with respect to the spring, the valve closes.
• the stem operating as the valve piston is acted upon by the pressure in the pressure vessel.
• a certain pressure level must be maintained constantly below the piston.
• the pressure vessel will become quite empty.
• the entire apparatus is complicated, heavy and clumsy, the spring force cannot be adjusted, and the apparatus is not suitable for feeding pressurized gas into a bottle provided with a cap.
• the purpose of the present invention is to provide a pressure-reducing valve for supplying pressurized gas into a bottle, the valve comprising none of the aforementioned drawbacks.
• the pressure-reducing valve according to the invention is characterized in that the pressure-reducing valve comprises means for pressing the spring axially against the piston part so that the force acting on the spring can be used to open the closing means and to allow the gas flow through the pressure-reducing valve.
• An essential feature of the invention is that the pressure to be output from the pressure-reducing valve is determined by a spring force acting on one side of the piston of the pressure-reducing valve, and the pressure of the pressurized gas acts on the opposite side of the piston from the spring, and that the spring force acting on the piston and therefore also the level of the pressure to be output from the pressure-reducing valve are adjusted by compressing the spring in a predetermined length.
• Another feature is that the pressure of the gas to be supplied into the pressure- reducing valve is throttled to a lower level before it acts on the piston of the pressure-reducing valve.
• a further feature is that while the operation of the pressure-reducing valve is started and the pressure to be output is regulated by pressing the spring with the bottle, the pressure-reducing valve is tightened against the bottle.
• the invention has the advantage that the pressure output from the pressure-reducing valve does not depend on the level of the input pressure and that the output pressure can be adjusted by pressing with the bottle. Another advantage is that the regulating piston is only subjected to a low pressure. A further advantage is that the pressure-reducing valve is made to allow the passage of gas, to tighten against the bottle and to close by the mere insertion of the bottle in the correct position. Another advantage is that the invention has a simple construction and is easy to manufacture.
• the figure shows a pressure-reducing valve 1 in cross-section.
• the pressure-reducing valve 1 comprises a body 2 inside which there is a lower slide 3.
• the lower slide 3 comprises a projecting piston part 4 that is tightened against the body 2 with a piston packing 5.
• the lower slide 3 is encircled by an upper slide 6 in such a way that the lower slide 3 and the upper slide 6 can move axially relative to each other.
• the terms 'upper', 'lower' and 'bottom' refer in this connection to the relations of the devices and components positioned in the manner shown in the accompanying figure, and it is clear that these devices and components may also be in some other position, whereupon other kinds of terms may also be used to replace the aforementioned terms.
• a spring 7 is placed in such a way that its one end rests on the lower part of the upper slide 6 and the other end on the upper surface of the piston part 4 in the lower slide 3.
• the lower slide 3 and the upper slide 6 are sealed against each other with an upper seal 8 of the lower slide.
• the section of the lower slide 3 extending below the piston part 4 is positioned inside a sleeve 10.
• the sleeve 10 is sealed against the body 2 with a sleeve packing 11.
• the lower slide 3 and the sleeve 10 are tightened together with an upper bottom seal 12 of the lower slide and with a lower bottom seal 13 of the lower slide.
• the sleeve 10 comprises at least one opening 14 passing through the sleeve. Below the piston part 4 of the lower slide 3, there is at least one opening 15 passing through the wall of the lower slide 3. Inside the lower slide 3 there is a conduit 16 extending axially through the entire length of the slide. At the lower end of the body 2, there is a hollow for fastening the pressure bottle. The sides of the hollow comprise threads for fastening the pressure-reducing valve 1 to the pressure bottle by means of a threaded joint. The edges of the pressure bottle aperture are then tightened against the body 2 with a seal 17 for the body. At the upper end of the body 2 there is a recess where the bottle 18 can be placed, the cap 19 of the bottle being positioned against the upper seal 9 of the upper slide.
• the pressure-reducing valve 1 When the pressure-reducing valve 1 is used, it is screwed on the pressure bottle, whereupon the aperture of the bottle is sealed against the body 2 with the seal 17 of the body.
• the sleeve 10 simultaneously presses the needle valve of the pressure bottle, so that the pressurized gas inside the bottle can flow to the opening 14 of the sleeve.
• the upper slide 6 is not subjected to any kind of force from above, whereupon the sleeve opening 14 is situated between the upper bottom seal 12 of the lower slide and the lower bottom seal 13 of the lower slide, and the seals prevent the flow of the pressurized gas from the sleeve opening 14 onwards.
• the upper slide 6 When the upper slide 6 is pressed with the bottle 18 and the cap 19 situated at the end of the bottle, the upper slide 6 further presses the lower slide 3 downwards by means of the spring 7. Since the sleeve opening 14 is perpendicular to the lower slide 3, the gas pressure in the sleeve opening 14 does not essentially affect the movement of the lower slide 3.
• the pressurized gas can flow through the sleeve opening 14 from between the lower slide 3 and the sleeve 10 via the lower slide opening 15 to the conduit 16. Further, the pressurized gas can simultaneously also flow to the space below the piston part 4.
• the clearance between the lower slide 3 and the sleeve 10 is of such magnitude that the pressurized gas can flow from between the components, but the clearance is so small, however, that it throttles the gas flow. If the upper slide 6 is continuously pressed with the bottle 18 and the cap 19 situated at the end of the bottle, the pressurized gas can flow from the sleeve opening 14 onwards. This continues until the pressure inside the bottle 18 and therefore also the pressure in the conduit 16, acting below the piston part 4 and lifting the piston against the spring 7 force, increases to such an extent that the lower slide 3 rises such a distance that the upper bottom seal 12 of the lower slide is lifted above the sleeve opening 14 and the flow from the sleeve opening 14 onwards is stopped.
• the pressure of the gas supplied to the pressure-reducing valve 1 does not affect the pressure of the output gas, but it is determined by the spring 7 force acting against the pressure prevailing below the piston part 4 and simultaneously against the output pressure.
• the flow is also naturally interrupted if the bottle 18 and the cap 19 are removed from pressing the upper slide 6.
• the sleeve 10 is pressed against a shoulder of the body and it is therefore quite immobile.
• the sleeve 10 could be of an integral structure with the body 2, but in view of the manufacture, assembly and maintenance of the pressure-reducing valve 1, it is preferable that the sleeve 10 is a separate piece.
• there is a drill taper 20 inside the sleeve In the pressure- reducing valve according to the figure, there is a drill taper 20 inside the sleeve. Providing the sleeve 10 with a drill taper 20 makes the manufacture of the sleeve 10 easier, but the drill taper 20 is not necessary for the operation of the pressure-reducing valve 1.
• the piston part 4 of the lower slide 3 rests on the shoulders of the body 2 in the uppermost position shown in the figure.
• the sleeve 10, the lower slide 3, the piston part 4 and the shoulders of the body 2 are positioned in such a way that the lower bottom seal 13 of the lower slide does not rise at all above the lower edge of the sleeve opening 14.
• the spring 7 is designed in such a way that when the upper slide 6 rests on the body 2 shoulder in the uppermost position shown in the figure, the spring 7 does not press the lower slide 3 downwards.
• the body 2, the lower slide 3, the upper slide 6 and the sleeve 10 are also positioned in such a way that they are coaxial and substantially rotation-symmetrical with respect to the axis.
• the pressurized gas flows forward through an aperture or a valve provided in the cap 19 to the bottle 18.
• the aperture of the cap 19 is preferably situated in the middle of the cap 19.
• the upper seal 9 of the upper slide is positioned around the aperture of the cap 19.
• the upper seal 9 of the upper slide prevents the gas from flowing between the upper slide 6 and the cap 19.
• the upper seal 9 of the upper slide can be designed in such a way that when the pressure inside the pressure-reducing valve 1 increases too high for some reason, gas can escape from between the upper seal 9 of the upper slide and the cap 19. However, in a normal situation the pressure of the gas flowing from the pressure-reducing valve 1 to the bottle 18 is determined by means of the force with which the upper slide 6 is pressed downwards.
• a necessary number of, for example, separate washers 21 may be placed around the upper slide. In such a case, the bottle 18 and the cap 19 cannot be pressed all the way to the body 2, but only to the washer 21.
• the spring 7 may be replaced with some other similar member, such as a flexible rubber ring.
• the pressure-reducing valve 1 may be arranged to be used in connection with pressure vessels other than those provided with a needle valve. With the pressure-reducing valve 1, the pressurized gas can also be supplied to some other container than a bottle provided with a cap.

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Fluid Mechanics (AREA)
• General Physics & Mathematics (AREA)
• Automation & Control Theory (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Safety Valves (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8543213

Family Applications (1)

Country Status (4)

Citations (2)

• 1995
  • 1995-04-07 FI FI951691A patent/FI101107B/fi active IP Right Grant
• 1996
  • 1996-04-01 AU AU51122/96A patent/AU5112296A/en not_active Abandoned
  • 1996-04-01 WO PCT/FI1996/000176 patent/WO1996031729A1/en not_active Application Discontinuation
  • 1996-04-01 EP EP96907528A patent/EP0870153A1/en not_active Withdrawn

Patent Citations (2)

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