US20070031266A1 - Self-closing valve with adjustable activation - Google Patents

Self-closing valve with adjustable activation Download PDF

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Publication number
US20070031266A1
US20070031266A1 US11/489,786 US48978606A US2007031266A1 US 20070031266 A1 US20070031266 A1 US 20070031266A1 US 48978606 A US48978606 A US 48978606A US 2007031266 A1 US2007031266 A1 US 2007031266A1
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US
United States
Prior art keywords
valve
chamber
piston
hole
fluid
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.)
Abandoned
Application number
US11/489,786
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English (en)
Inventor
Roberto Amaduzzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arrow Line Srl
Original Assignee
Arrow Line Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arrow Line Srl filed Critical Arrow Line Srl
Assigned to ARROW LINE S.R.L. reassignment ARROW LINE S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMADUZZI, ROBERTO
Publication of US20070031266A1 publication Critical patent/US20070031266A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K21/00—Fluid-delivery valves, e.g. self-closing valves
    • F16K21/04—Self-closing valves, i.e. closing automatically after operation
    • F16K21/06—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening
    • F16K21/12—Self-closing valves, i.e. closing automatically after operation in which the closing movement, either retarded or not, starts immediately after opening with hydraulically-operated opening means; with arrangements for pressure relief before opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor

Definitions

  • the device of the invention is applicable, for example, to the field of water-cleaning machines but offers considerable versatility, so that it can be used in any hydraulic circuit including a positive displacement pump and a device governing a fluid at pressure.
  • the hydraulic circuit of a water-cleaning machine includes a pump, preferably positive displacement with pistons, connected downstream through a conduit with a valve, which valve is connected to a pistol for dispensing the pressurised fluid.
  • This valve is connected through a further by-pass conduit to the pump.
  • the valve traps the pressurised fluid between the connection conduit which joins the valve and the gun, zeroing the pressure between valve and pump in the by-pass circuit, as the by-pass discharge is opened.
  • valves used in these types of circuit are pressure isolators, which operate with very short reaction times and with usually high reaction forces on opening of the gun.
  • the main aim of the present invention is to provide a self-closing valve which can be regulated and which is able to reduce the entity of the reaction force during the transitory period of opening a pressurised fluid dispensing device such as, for example, a gun for water-cleaning machines.
  • a pressurised fluid dispensing device such as, for example, a gun for water-cleaning machines.
  • the term “transitory” is taken to mean the time that passes from the start of dispensing to reaching the working flow-rate of the gun.
  • a second aim of the present device is to provide an adjustable self-closing valve which includes the possibility of regulating the duration of the transitory period of opening of a pressurised fluid dispensing device such as, for example, a gun for water-cleaning machines.
  • a further aim of the present device is to provide an adjustable self-closing valve which, by limiting the reaction forces that come into play, enables a greater working life of the mechanical organs that make up the hydraulic circuit, which are no longer subject to sudden shocks.
  • FIG. 1 is a lateral view in section of the adjustable self-closing valve of the invention in the rest position;
  • FIG. 2 is a lateral view in section of the adjustable self-closing valve of the invention in the closed position
  • FIG. 3 illustrates a first application of the adjustable self-closing valve of the invention mounted in parallel with a traditional control valve of a fluid dispenser device;
  • FIG. 4 illustrates a first application of the adjustable self-closing valve of the invention mounted in series with a traditional control valve of a fluid dispenser device;
  • FIG. 5 is a detailed view of a constructional detail of the adjustable self-closing valve.
  • 1 denotes in its entirety an adjustable self-closing valve.
  • the valve 1 exhibits an external body 2 having a predominant direction along an axis X-X.
  • the external body 2 internally comprises a cavity 3 terminating externally with respect to the external body 2 with an outlet section 4 and an inlet section 5 .
  • the outlet section 4 is preferably oriented along the axis X-X while the inlet section 5 is preferably oriented transversally with respect to the outlet section 4 .
  • a seating 19 is present at the outlet section 4 , in which seating 19 an annular striker element 20 is housed, affording a hole 21 which is preferably arranged coaxially to the axis X-X; exiting fluid is channelled through this hole 21 .
  • the seating 19 further exhibits an increase in section 25 housing an annular body 18 located in contact with the striker element 20 , which annular body 18 exhibits an internal diameter which is smaller than the external diameter of the striker element 20 .
  • a cap 6 Opposite to the outlet section 4 there is a cap 6 which is connectable to the external body 2 by means of a threaded coupling.
  • a piston 7 sealedly slides internally of the cavity 3 in a parallel direction to the axis X-X.
  • the piston 7 defines a first chamber 8 internally of the cavity 3 , which first chamber 8 is located downstream of the piston 7 , and also defines a second chamber 9 upstream of the piston 7 .
  • the first chamber 8 communicates between the inlet section 5 and the outlet section 4 , while the second chamber faces the cap 6 .
  • the piston 7 activated reciprocally by viscous forces and contrasted by elastic means 10 and a pressure difference to close or open the outlet section 4 , internally exhibits a channel 11 having a development axis that preferably coincides with the axis X-X, thus being coaxial to the hole 21 of the striker element 20 .
  • the channel 11 which enables communication between the first chamber 8 and the second chamber 9 , is defined by a first tract 22 , a first hole 12 , able to place the first chamber 8 and the first tract 22 in communication, and a second hole 13 , enabling communication between the second chamber 9 and the first tract 22 .
  • the first tract 22 exhibits, in proximity of the second chamber 9 , a change in section which defines a first portion 16 and a second portion 17 .
  • the first portion 16 has a greater external diameter than the second portion 17 and is side-by-side with the hole 12 ( FIG. 5 ).
  • the first hole 12 and the second hole 13 pass through the piston 7 and are directed transversally with respect to the first tract 22 , which they are in communication with.
  • the piston 7 exhibits a stem 14 , coupled on the first tract 22 , which stem 14 is preferably conical and can close the hole 21 by viscous drag due to fluid which, passing in outlet through the hole 21 , drags the stem 14 with it.
  • the piston 7 further exhibits means for intercepting 15 the fluid which act on the first tract 22 to slow down the fluid passage from the first chamber 8 to the second chamber 9 .
  • the means for intercepting 15 are defined in a preferred embodiment by a cylindrical body 24 coupled with play internally of the first tract 22 .
  • the cylindrical body 24 could be replaced by any body that is solid in revolution, such as for example a sphere or any extruded solid, such as for example a parallelepiped, as long as the aspect of the coupling with play is respected with the first tract 22 in which it is inserted.
  • the elastic means 10 acting on the piston 7 and located in the first chamber 8 , exhibit a side which is in striking contact with the piston 7 and an opposite side which is in striking contact on the outlet section 4 .
  • the elastic means 10 are preferably defined by a spring 26 exhibiting a first end 26 a striking on the annular body 18 and a second end 26 b striking on the piston 7 .
  • the piston 7 is mobile alternatively from a rest position, in which the piston 7 is in striking contact with the cap 6 due to the action of the elastic means 10 and the stem 14 partially intercepts the hole 21 ( FIG. 2 ), in a closed position in which the piston 7 closes the outlet section 4 , i.e. the stem 14 completely intercepts the hole 21 ( FIG. 1 ).
  • valve closure is obtained mostly via the piston 7 , which exhibits at the outlet 4 section thereof a bevelled projection 27 which in the valve closed position strikes on a seating 28 afforded on the external body 2 .
  • the geometric characteristics of the stem 14 can be varied, as can those of the seating 20 , to obtain various stem closure action times.
  • the adjustable self-closing valve is normally open and self-closes when the first chamber is pressurised.
  • FIG. 3 shows a first example of a hydraulic circuit for water cleaners which is provided with an adjustable self-closing valve 1 mounted in parallel with respect to a traditional by-pass valve 34 , which governs a fluid dispenser device 35 .
  • a motor 30 is present in the hydraulic circuit, which motor 30 powers a positive displacement pump 31 connected upstream to a water delivery pipe 32 .
  • a first pipe 33 emerges from the pump 31 , which first pipe 33 is in hydraulic connection with the traditional by-pass valve 34 and the adjustable self-closing valve 1 .
  • the traditional by-pass valve 34 is connected to a fluid dispenser device 35 and also to a first by-pass conduit 36 for the water delivery pipe 32 .
  • the adjustable self-closing valve 1 is hydraulically connected to the water delivery pipe 32 through a second by-pass conduit 37 .
  • FIG. 4 shows a second example of a hydraulic circuit for water-cleaning machines having an adjustable self-closing valve 1 mounted in series with a second, flow sensitive valve 34 ′ of known type that governs a fluid dispenser device 35 .
  • a motor 30 supplies a pump 31 connected upstream to a water delivery pipe 32 .
  • a first pipe 33 emerges from the pump 31 , the first pipe 33 being in hydraulic connection with the flow sensitive valve 34 ′.
  • the flow sensitive valve 34 ′ is connected downstream to a fluid delivery device 35 and with a by-pass conduit 36 to the water delivery pipe 32 .
  • the adjustable self-closing valve 1 is hydraulically interpositioned between the flow sensitive valve 34 ′ and the fluid delivery device 35 and exhibits a second by-pass conduit 37 connected to the water delivery pipe 32 .
  • the integrated hydraulic circuit of the device operates as in the following description.
  • the traditional by-pass valve 34 causes an upstream pressure drop to negligible pressure with the fluid regulation device 35 closed and downstream an isolation of the circuit.
  • the traditional by-pass valve 34 closes fluid transmission thereto and by-passes the fluid to the water delivery conduit 32 via the first by-pass conduit 36 .
  • a part of the fluid delivered by the pump 31 reaches the adjustable self-closing valve 1 through the inlet section 5 .
  • the valve 1 receives the fluid in the first chamber at a practically zero pressure.
  • the adjustable self-closing valve 1 is in a rest position and the elastic means 10 keep the piston 7 in striking position against the cap 6 (see FIG. 1 ).
  • the means for intercepting the fluid 15 are still.
  • the stem 14 connected to the piston 7 , allows exit of inletting liquid from the valve 1 as pressure levels are very low.
  • valve 1 When the delivery device 35 is closed, the valve 1 by-passes the inletting liquid to the water delivery conduit 32 through the second by-pass conduit 37 .
  • the traditional by-pass valve 34 closes the first by-pass conduit 36 , enabling transmission of fluid towards the delivery device 35 .
  • the fluid transmitted by the pump 31 is separated and a part thereof reaches the delivery device 35 while the remaining part thereof goes to the valve 1 via the inlet section 5 .
  • the drip-passage of the exiting fluid causes a viscous drag and a pressure drop which causes the stem 14 to translate and thus close the hole 21 .
  • the piston 7 also translates causing a depression in the second chamber 9 .
  • the fluid inletting to the first chamber 8 passes through the channel 11 of the second chamber 9 .
  • the passage of the fluid is slowed down due to the action of the means for intercepting 15 acting on the channel 1 1 .
  • valve 1 reaches the closed position and the second by-pass conduit 37 is closed so that the pressurised fluid is sent in its totality by the traditional by-pass valve 34 to the dispenser device 35 .
  • valve 1 The retarded closure of the valve 1 enables working pressure to be reached by the fluid dispenser device 35 very gently, avoiding the emergence of reaction forces.
  • the integrated hydraulic circuit of the device functions as follows.
  • the flow sensitive valve 34 ′ enables, when the dispenser device 35 is closed, a lowering of pressure in the whole circuit, to negligible levels.
  • the flow-sensitive valve 34 ′ by-passes the fluid through the first by-pass conduit 36 , excluding both the dispenser device 35 and the valve 1 .
  • the valve 1 is open in the rest position, with the piston 7 striking against the cap 6 under pressure of the elastic means 10 , while the means for intercepting 15 are still.
  • the flow-sensitive valve 34 ′ closes the first by-pass conduit 36 .
  • the fluid sent to the flow-sensitive valve 34 ′ separates and in part goes to the dispenser device 35 and in part reaches the valve 1 via the inlet section 5 .
  • valve 1 Once the valve 1 is closed the fluid is totally conveyed by the flow sensitive valve 34 to the dispenser device 35 .
  • the drip-through of the water will happen faster from the second chamber 9 to the first chamber 8 , i.e. during the return run from the closed position to the rest position.
  • valve 1 faster to reset, which is a necessary condition for it to correctly perform the following opening of the dispenser device 35 .
  • the valve 1 exhibits the further advantage of managing the duration of the closure transition.
  • valve 1 can be advantageously united with the traditional by-pass valve 34 or the flow-sensitive valve 34 ′, so as to form a single body, while maintaining the same configuration as the circuit illustrated in FIGS. 3 and 4 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)
US11/489,786 2005-07-22 2006-07-20 Self-closing valve with adjustable activation Abandoned US20070031266A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05425534A EP1746317A1 (de) 2005-07-22 2005-07-22 Selbstschließendes Ventil mit justierbarer Aktivierung
EP05425534.4 2005-07-22

Publications (1)

Publication Number Publication Date
US20070031266A1 true US20070031266A1 (en) 2007-02-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/489,786 Abandoned US20070031266A1 (en) 2005-07-22 2006-07-20 Self-closing valve with adjustable activation

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US (1) US20070031266A1 (de)
EP (1) EP1746317A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101566179B (zh) * 2009-05-14 2011-03-23 李来友 液压限流式超压自闭阀
CN103406234B (zh) * 2013-09-05 2015-07-01 吉林大学 容积式喷射点胶装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677417A (en) * 1952-06-05 1954-05-04 Gilbert & Barker Mfg Co Time delay device and auxiliary cutoff valve for pressure-atomizing oil burners
US3806037A (en) * 1972-12-01 1974-04-23 Hanson Equipment Co Selective fluid discharge system and control valve means therefor
US4182354A (en) * 1978-05-02 1980-01-08 U.S. ParaPlate Corporation Method and apparatus for flow diversion in a high pressure fluid delivery system
US5580817A (en) * 1993-05-28 1996-12-03 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Valve assembly
US5735461A (en) * 1995-03-30 1998-04-07 Kew Industri A/S High-pressure cleaner with bypass valve for the pump
US6041807A (en) * 1997-04-09 2000-03-28 Toyoda Koki Kabushiki Kaisha Flow control device of power steering apparatus
US6328535B1 (en) * 1997-01-03 2001-12-11 Hobourn Automative Limited Flow control valve capable of adjusting fluid flow characteristics in accordance with a position of a valve element in a bore
US6334458B1 (en) * 1999-05-21 2002-01-01 Arrow Line S.R.L. By-pass valve in particular for pressure-washing machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2007850A1 (en) * 1989-01-17 1990-07-17 Clive R. Paige Pressure washer with spring-less outlet to inlet bypass
DE9301796U1 (de) * 1993-02-09 1993-03-25 Alfred Kaercher Gmbh & Co, 7057 Winnenden, De

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677417A (en) * 1952-06-05 1954-05-04 Gilbert & Barker Mfg Co Time delay device and auxiliary cutoff valve for pressure-atomizing oil burners
US3806037A (en) * 1972-12-01 1974-04-23 Hanson Equipment Co Selective fluid discharge system and control valve means therefor
US4182354A (en) * 1978-05-02 1980-01-08 U.S. ParaPlate Corporation Method and apparatus for flow diversion in a high pressure fluid delivery system
US5580817A (en) * 1993-05-28 1996-12-03 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Valve assembly
US5735461A (en) * 1995-03-30 1998-04-07 Kew Industri A/S High-pressure cleaner with bypass valve for the pump
US6328535B1 (en) * 1997-01-03 2001-12-11 Hobourn Automative Limited Flow control valve capable of adjusting fluid flow characteristics in accordance with a position of a valve element in a bore
US6041807A (en) * 1997-04-09 2000-03-28 Toyoda Koki Kabushiki Kaisha Flow control device of power steering apparatus
US6334458B1 (en) * 1999-05-21 2002-01-01 Arrow Line S.R.L. By-pass valve in particular for pressure-washing machines

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ARROW LINE S.R.L., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMADUZZI, ROBERTO;REEL/FRAME:018077/0291

Effective date: 20060717

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION