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
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/44—Mechanical actuating means
  • F16K31/48—Mechanical actuating means actuated by mechanical timing-device, e.g. with dash-pot
• • 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
  • F16K21/06—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening
  • F16K21/10—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening with hydraulic brake cylinder acting on the closure member

Definitions

• the present invention relates to a self-closing valve arrangement, comprising a valve housing having a valve which is located between an inlet for pressure liquid and an outlet leading to a liquid-consuming device, and which is arranged to take a first position in which the inlet is connected to the outlet, and a second position in which the inlet is isolated from the outlet; and regulating means controlled ⁇ by the pressure in the liquid in a manner to return the valve to the second position subsequent to the valve having been set to the first position, after a given time interval.
• Self-closing valves of this kind are used in many contexts, and have mainly been provided for the purpose of avoiding wasting water unnecessarily, or in those cases when a determined volume of water is required.
• Examples of areas in which such valves are used include so-called flushing valves for use in C-basins to which a given volume of water shall be delivered, showers, wash basins, etc., in public buildings.
• flushing valves for use in C-basins to which a given volume of water shall be delivered, showers, wash basins, etc., in public buildings.
• Known constructions are based on the use of the pressure of the pipe water upstream of the shut-off valve, time clock or equivalent means. For maintenanc and cost reasons, it is preferred to control the regulating means by the pressure liquid.
• valve arrangement Another disadvantage with known valve arrangement is that the closing time varies with the pressure of the liquid.
• known arrangements include a large number of seals, control devices, etc. which during stationary periods, i.e. periods in which the flush is not used, are subjected to the whole of the pipe pressure, therewith increasing thedemands placed on said seals and also on the risk of leakages.
• Figure 1 is a vertical sectional side-view of an embodiment of the invention
• Figure 2 is a top plan view of the arrangement illustrated in Figure 1;
• Figure 3 is a top plan view of the stationary valve plate
• Figure 4 is a bottom plan view of the movable valve plate
• Figure 5 illustrates a modified regulating means
• Figure 6 illustrates a modified valve
• the illustrated self-closing valve means includes a valve housing 1 having an inlet 2, which is connected to a pressure-water pipe or line 3, or to a pipe or line for some other form of liquid under pressure, and a water outlet 4.
• the outlet 4 is shown to be connected to a shower head 6 by means of a pipe 5, although, as mentioned in the
• the water can be delivered to any other device whatsoever, such as a WC-ba ⁇ in for example.
• the inlet 2 communicates with a channel or passage 7, while the outlet 4 communicates with a channel or passage 8.
• the exit orifices of the two channels lie in a common plane in the valve housing 1 and connect with a chamber 9, which has a lower flange 10 located in said plane, said flange being of rectangular configuration in the illustrated embodiment.
• there two openings are separated by a wall 14.
• the inlet opening 12 coincides with the exit orifice of the channel 7, and the outlet opening 13 coincides with the exit orifice of the channel 8.
• the plate 11 is made of a ceramic material, for example aluminium oxide, and has an upper planar surface 15 which sealingly abuts the lower planar surface 16 of a movable ceramic plate 17 ( Figure 4) .
• a recess 18 Arranged on the under-surface of • the plate 17 is a recess 18 which when the movable valve plate 17 is located in the Figure 1 position, forms a throughflow cavity leading from the inlet opening 12 to the outlet opening 13.
• the shaft 22 is, in turn, firmly mounted on a plate-like wall 23, which is attached to a cover 24.
• the cover 24 covers the chamber 9, and is fixedly mounted in the valve housing 1, in a manner not shown.
• the cover has provided therein an elongate slot or groove 25 which allows the operating arm 21 to swing about the pivot 22.
• a double-arm angular operating lever 26 one arm 27 of which is bifurcate and extends downwardly, along the operating arm 21.
• the two legs 28,29 of the bifurcate arm 27 on a respective side of a fixed peg 30 on the arm 21 , with a certain amount of play between said peg 30 and respective legs.
• the valve of this embodiment has arranged on the cover or cap 24 thereof a second wall means 31, which, together with the first wall means 23, carries a pin 32.
• Mounted on the lever 26, on the opposite side of the pivot shaft 22 is a fixed peg 33, while between the peg 33 and the pin 32 there is arranged a tension spring 3 .
• a passage or channel 35 which exits into a chamber 36 in the valve housing 1 , communicates with the outlet 4 at a location beneath the outlet opening 13 in the stationary plate 17.
• a further channel 37 extends horizontall from the chamber 36 to a vertical channel 38.
• This channel 38 exits into a pressure cylinder 39, at a location beneath a cylindrical piston 40 arranged for axial movement in said cylinder.
• Extending peripherally around the piston 40 is a groove which accommodates an O-ring 41, which sealingly abuts the wall of the cylinder 39.
• a piston rod 42 which protrudes through an opening in a cover member 43 enclosing the cylinder 39, said cover membe for example, being screwed into the upper opening of the cylinder.
• the upper end of the piston rod 42 is directed towards the lever 26.
• a thrust spring 44 there is arranged between the upper surface of the piston 40 and the cover member 43 a thrust spring 44.
• a screw-type needle valve 45 having a needle 46, which can be screwed into the area where said spacious channels intersect, to choke said channels to a greater or lesser extent.
• the described arrangement has the following mode of operation:
• the lever 26 is moved down to the position shown in Figure 1 , either manually, electromagnetically, or in some other suitable manner, and the bifurcate arm 27, as it swings around the pivot shaft 22, engages the peg 30 on the operating arm 21, which is consequently swung to the illustrated position, whereup the movable valve plate 17 is moved to the right in the Figure, to the illustrated position, through the engagement of the ball 20 with said plate 17.
• the inlet opening 12 communicates with the outlet opening 13, through the cavity 18, and water from the pipe or line 3 will thus flow into the channel 7, through the inlet opening 12, through the cavity 18, through the outlet openin 13, to the channel 8 and the outlet 4, and from there through the pipe or line 5, to the shower head 6.
• a non-return valve 47 through which the water can rapidly depart, may be arranged in the bottom of the cylinder 39. It should be observed that a full stream of water is maintained until that moment when the spring 34 takes over the pivoting movement, since the operating arm 21 is not activated until the leg or abutment 29 reaches the peg 30, and consequently positive closure is obtained, even when the pressure is low. If a very low pressure is used, i.e. if it is desired to keep the flow losses at a low level, the spring 44 can be omitted. In the case, the piston 40 is pressed down at th
• pivot shaft for the lever 26 can be separate from the operating arm 21, in which case the two pivot shafts extend parallel to one another.
• the valve comprises ceramic plates which are movable relative to one another. It will be understood, however, that other kinds of- valves can be used.
• the piston 40 has been replaced with a diaphragm 48, the periphery of which is attached to the wall of the cylinder in a manner not shown.
• the diaphragm 48 is provided with mutually coaxial, circular corrugations and has a central planar portion 49 to which the lower end of the piston rod 42 is welded or attached in some other suitable way.
• the diaphragm 48 can be made of any material suitable for the purpose, for example metal or plastics material. When the diaphragm is smooth, it is suitably made of rubber.
• Figure 6 illustrates an embodiment of the valve, in which the stationary valve plate 11 in Figure T is replaced with a cylinder 50, one end of which is closed by means of a cover member 51.
• a piston 52 Arranged in the cylindrical cavity is a piston 52, which sealingly abuts the wall of the cylinder.
• the inner end surface of the piston 52 lies behind an inlet opening 12 in the cylinder, and arranged in the cylindrical surface of the piston is a groove which accommodates the ball 20 on the operating arm 21.
• valves can also be used, such as ball vaJjie ⁇ L t ⁇ for

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mechanically-Actuated Valves (AREA)
• Fluid-Driven Valves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20352761

Family Applications (1)

Country Status (4)

Cited By (6)

Citations (8)

• 1983
  • 1983-10-05 SE SE8305456A patent/SE439193B/sv unknown
• 1984
  • 1984-09-27 EP EP84903670A patent/EP0156891A1/en not_active Withdrawn
  • 1984-09-27 AU AU35017/84A patent/AU3501784A/en not_active Abandoned
  • 1984-09-27 WO PCT/SE1984/000314 patent/WO1985001562A1/en unknown

Patent Citations (8)

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