EP2063127A1 - Sicherheitsvorrichtung für Einlassventile - Google Patents

Sicherheitsvorrichtung für Einlassventile Download PDF

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Publication number
EP2063127A1
EP2063127A1 EP07425746A EP07425746A EP2063127A1 EP 2063127 A1 EP2063127 A1 EP 2063127A1 EP 07425746 A EP07425746 A EP 07425746A EP 07425746 A EP07425746 A EP 07425746A EP 2063127 A1 EP2063127 A1 EP 2063127A1
Authority
EP
European Patent Office
Prior art keywords
intake valve
compressor
open
duct
valve
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.)
Withdrawn
Application number
EP07425746A
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English (en)
French (fr)
Inventor
Michele Solarski
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP07425746A priority Critical patent/EP2063127A1/de
Publication of EP2063127A1 publication Critical patent/EP2063127A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow

Definitions

  • the subject of the present invention is a safety device for intake valves and an intake valve including said safety device of the type specified in the preamble of the first claim.
  • the above compression apparatuses are designed to bring an air tank up to and keep it at a given pressure, typically comprised between 5 bar and 15 bar, for any purpose, such as for example the inflation of tyres, etc.
  • a given pressure typically comprised between 5 bar and 15 bar
  • An apparatus of this sort is described, for example, in the U.S. patent No. US-B-6,811,384 .
  • the above apparatuses act by means of a compressor, generally actuated by an electric motor, which takes in air from the external environment, through the intake valve, and introduces it into a purposely provided accumulation tank.
  • Said apparatuses then comprise a circuit for the air under pressure, which enables transfer of air to the accumulation tank and, when the latter has reached the desired pressure, exhaust of the residual pressurized air present in the same circuit. Exhaust of the pressurized air takes place generally through the intake valve, which discharges into the external environment, without causing high levels of noise and pressure jumps.
  • the above apparatuses then comprise a lubrication circuit, designed to enable continuous lubrication of the compressor by means of recirculation and cooling of a lubricant.
  • the same lubrication circuit generally has some elements in common with the pressurized-air circuit, in particular in a position corresponding to, and in the proximity of, the compressor.
  • the lubricant is located in the area corresponding to the compressor and the lubrication valve, in environments at a pressure higher than the pressure of the external environment.
  • the present drawback has been partially overcome by means of a piston that enables closing of part of the intake valve when the apparatus is in discharging the residual air.
  • the piston does not close the intake valve and does not prevent leakage of lubricant into the external environment through the intake valve.
  • the aforesaid leakage of lubricant entails a long and burdensome cleaning of the intake valve and of the surrounding environment, stoppage of the compression apparatus during cleaning of the intake valve itself, environmental pollution due to the waste of lubricant and various other drawbacks.
  • the technical task underlying the present invention is to provide a safety device for intake valves capable of substantially overcoming the drawbacks referred to.
  • an important purpose of the invention is to obtain a safety device for intake valves capable of preventing the leakage of lubricant into the intake valve and out of the latter in situations of sudden blocking of the compressor or in other unexpected situations that can occur during the use of the compression apparatuses.
  • the safety device according to the invention is designated as a whole by the reference number 1.
  • It is designed to be applied in a position corresponding to an intake valve 2, in particular in a position corresponding to an intake valve 2 which can be applied on an apparatus 3 for compression of fluids.
  • the fluid-compression apparatuses 3 are designed to supply compressed air to an accumulation tank 4 that can be used directly by a user for any purpose, such as, for example, for inflating tyres of vehicles, etc.
  • the same compression apparatuses 3 act by means of a compressor 5, designed to draw in fluids, conveniently constituted by air, from the external environment, through the intake valve 2, and to introduce them into the accumulation tank 4 through a circuit for pressurized fluids 6.
  • the air coming from the external environment is filtered by means of a purposely provided filter 7, passes through the intake valve 2, reaches the compressor 5, and is then sent, through a first duct 9, to an intermediate tank 10, which is at pressures higher than the external pressure.
  • the latter is connected, through a second duct 11 and a third duct 12, which are equipped with purposely provided valves 13, respectively to the intake valve 2 and to the accumulation tank 4.
  • the latter enables, in fact, a slow and calibrated exhaust of the air, which does not cause any noise or pressure jumps in the external environment.
  • the apparatus 3 moreover comprises a lubrication circuit 14, designed to supply the compressor 5 with lubricant continuously.
  • the lubrication circuit 14 coincides in part with the pressurized-fluid circuit 6 described above.
  • the first duct 9 and the intermediate tank 10 form part both of the lubrication circuit 14 and of the pressurized-fluid circuit 6.
  • the lubrication circuit 14 moreover comprises a return channel 15 and a radiator 16 for cooling the lubricant.
  • the lubricant is then constantly transferred, through the first duct 9 and together with the air, from the compressor 5 to the intermediate tank 10 and from here again to the compressor 5 through the return channel 15 and the radiator 16.
  • Both the pressurized air and the lubricant, which are separated by gravity or in some other way, are then stored in the intermediate tank 10.
  • the apparatus 3 comprises a motor 17, preferably an electric motor, and a drive belt 18, designed to move the compressor 5, usually constituted by a twin-screw compressor.
  • the aforesaid intake valve 2 constitutes one of the most delicate and complex portions of the entire apparatus 3. It is illustrated in Figures 2a and 2b .
  • the same valve 2 comprises an intake duct 19, in fluid communication with the compressor 5 and with the filter 7, and an exhaust duct 20 in fluid communication with the intermediate tank 10, through the second duct 11.
  • the intake duct 19 there is a purposely provided piston 21, designed to keep the intake duct 19 open in the case where the compressor 5 is taking in air through the valve 7 and to close it in the case where the apparatus 3 is discharging the pressurized air through the purposely provided exhaust duct 20.
  • the exhaust duct 20 comprises a closing channel 22 in fluid communication with the inside of the piston 21, designed to cause the pressurized air coming from the second duct 11 to be able to press the same piston 21 and set it in a position for closing the intake duct 19.
  • the exhaust duct 20 is then designed to enable a gradual exhaust of the pressurized air, and, for this purpose, conveniently comprises a needle valve 23, which can be regulated from outside and is designed to enable a partial closing of the same exhaust duct 20.
  • the safety device 1 is designed to be applied in a position corresponding to an intake valve 2.
  • It comprises a retention valve 24 designed to prevent any passage of fluid from the compressor 5 to the intake valve 2 and to enable passage of fluid from the intake valve 2 to the compressor 5.
  • the retention valve 24 comprises an open/close element 25 mobile within a seat 26 conveniently set in a duct 27 in fluid communication with the intake valve 2, and more in particular with the intake duct 19, and with the compressor 5, as illustrated in Figures 2a and 2b .
  • the open/close element 25 and the seat 26 define a closing position ( Figures 2b and 5 ), in which the open/close element closes the duct 27 completely, and an opening position ( Figures 2a and 4 ), in which the open/close element 25 does not obstruct the duct 27 completely.
  • the open/close element 25 is then mobile between the opening position and the closing position. It is conveniently set in an opening position ( Figure 2a ) when subjected to a pressure by a flow of fluid coming from the intake valve 2 and directed to the compressor 5, or equivalently by a pressure difference that will create the same flow, and is set in the closing position ( Figure 2b ) when subjected to a pressure by a flow coming from the compressor 5 and directed to the intake valve 2, or by an equivalent pressure difference.
  • the open/close element 25 is preferably constituted by a disk-shaped element made of metal material as illustrated in Figures 2a, 2b and 3 .
  • the seat 26, illustrated in the sections of Figures 4 and 5 comprises a first section ( Figure 5 ), which defines the closing position ( Figure 2b ), substantially counter-shaped to the open/close element 25, and a second section ( Figure 4 ), which defines the opening position ( Figure 2a ) and comprises guide elements 26a, designed to keep the open/close element 25 in the correct position, and elements of passage 26b, designed to enable passage of fluid through the duct 27 at the margins of the open/close element 25.
  • the retention valve 24 then comprises an elastic element 28 designed to keep, in the absence of flow, the open/close element in a closing position ( Figure 2b ).
  • the device 1 is structurally constituted by a metal plate 29, which can be connected, through screws or the like, to the intake valve 2 and to the compressor 5, within which the duct 27 is made.
  • the device 1 can be pre-arranged so that it is joined to an intake valve 2; in this case, the duct 27 is constituted by a portion of the intake duct 19.
  • the aforesaid plate 29 supports the open/close element 25 by means of a supporting element 30 (illustrated in Figures 3a and 3b ), which can be constrained to the plate by means of a purposely provided thread or the like and does not interrupt the duct 27 thanks to the presence of a plurality of holes for passage 30b.
  • the supporting element 30 comprises a cylindrical guide 30a available in a position corresponding to a second cylindrical guide 25a present on the open/close element 25 and designed to include the elastic element 28 and constrain the same open/close element 25 in a purposely provided direction.
  • the compression apparatus 3 performs its normal functions irrespective of the presence of the safety device itself.
  • the retention valve 24 when the compression apparatus 3 itself is supplying the accumulation tank 4, the retention valve 24 is in the opening position ( Figure 2a ) and enables passage of fluid from the intake valve 2 to the compressor.
  • the retention valve 4 is located preferably in the closing position, on account of the presence of the elastic element 28, and prevents passage of fluid between the valve 2 and the compressor 5.
  • the retention valve 24 closes, given that the pressure in the compressor 5 is higher than the external pressure, and prevents the passage of lubricant from the compressor 5 to the valve 2 and to the filter 7 or to the external environment.
  • the invention achieves important advantages.
  • the safety device 1 is able to prevent systematically and safely the leakage of lubricant from the intake valve 2 and/or from the filter 7 even in emergency conditions.
  • the safety device 1 is moreover very simple, sturdy, inexpensive and does not require particular maintenance.
  • an intake valve 2 including the safety device 1 achieves the same advantages of the latter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Compressor (AREA)
EP07425746A 2007-11-26 2007-11-26 Sicherheitsvorrichtung für Einlassventile Withdrawn EP2063127A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07425746A EP2063127A1 (de) 2007-11-26 2007-11-26 Sicherheitsvorrichtung für Einlassventile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07425746A EP2063127A1 (de) 2007-11-26 2007-11-26 Sicherheitsvorrichtung für Einlassventile

Publications (1)

Publication Number Publication Date
EP2063127A1 true EP2063127A1 (de) 2009-05-27

Family

ID=39099939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07425746A Withdrawn EP2063127A1 (de) 2007-11-26 2007-11-26 Sicherheitsvorrichtung für Einlassventile

Country Status (1)

Country Link
EP (1) EP2063127A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246521A (zh) * 2016-08-31 2016-12-21 广东标顶技术股份有限公司 一种压缩机快速放空阀结构及其压缩机压力控制方法
CN109937303A (zh) * 2016-09-21 2019-06-25 克诺尔商用车制动系统有限公司 用于商用车的螺杆式压缩机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118644A1 (de) * 1991-06-04 1992-12-10 Mannesmann Ag Vorrichtung zur regelung der liefermenge eines oelgeschmierten verdichters
DE19716549A1 (de) * 1997-04-19 1998-11-05 Compair Drucklufttechnik Gmbh Schraubenverdichter für stationäre oder mobile Kompressoren
US20030223888A1 (en) * 1999-10-21 2003-12-04 Mietto Virgilio Automatic regulator of intake air in a tank
WO2007101901A1 (en) * 2006-03-06 2007-09-13 Polarteknik Pmc Oy Ab Suction valve
DE102006016317A1 (de) * 2006-04-06 2007-10-11 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verdichteranordnung mit einer Ventileinheit im Ansaugbereich

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118644A1 (de) * 1991-06-04 1992-12-10 Mannesmann Ag Vorrichtung zur regelung der liefermenge eines oelgeschmierten verdichters
DE19716549A1 (de) * 1997-04-19 1998-11-05 Compair Drucklufttechnik Gmbh Schraubenverdichter für stationäre oder mobile Kompressoren
US20030223888A1 (en) * 1999-10-21 2003-12-04 Mietto Virgilio Automatic regulator of intake air in a tank
US6811384B2 (en) 1999-10-21 2004-11-02 Mietto Virgilio Automatic regulator of intake air in a tank
WO2007101901A1 (en) * 2006-03-06 2007-09-13 Polarteknik Pmc Oy Ab Suction valve
DE102006016317A1 (de) * 2006-04-06 2007-10-11 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verdichteranordnung mit einer Ventileinheit im Ansaugbereich

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246521A (zh) * 2016-08-31 2016-12-21 广东标顶技术股份有限公司 一种压缩机快速放空阀结构及其压缩机压力控制方法
CN109937303A (zh) * 2016-09-21 2019-06-25 克诺尔商用车制动系统有限公司 用于商用车的螺杆式压缩机

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