EP0855519B1 - Steuergerät in Monoblockausführung zur automatischen Drucksteuerung in einem Druckluftbehälter - Google Patents

Steuergerät in Monoblockausführung zur automatischen Drucksteuerung in einem Druckluftbehälter Download PDF

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Publication number
EP0855519B1
EP0855519B1 EP98101239A EP98101239A EP0855519B1 EP 0855519 B1 EP0855519 B1 EP 0855519B1 EP 98101239 A EP98101239 A EP 98101239A EP 98101239 A EP98101239 A EP 98101239A EP 0855519 B1 EP0855519 B1 EP 0855519B1
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EP
European Patent Office
Prior art keywords
monobloc
air
valves
distributor according
distributor
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.)
Expired - Lifetime
Application number
EP98101239A
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English (en)
French (fr)
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EP0855519A2 (de
EP0855519A3 (de
Inventor
Virgilio Mietto
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Individual
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Individual
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Priority to SI9830671T priority Critical patent/SI0855519T1/xx
Publication of EP0855519A2 publication Critical patent/EP0855519A2/de
Publication of EP0855519A3 publication Critical patent/EP0855519A3/de
Application granted granted Critical
Publication of EP0855519B1 publication Critical patent/EP0855519B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control means
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Definitions

  • the present invention relates to a dispenser monoblock for the automatic regulation of the pressure of air in an air tank, according to the preamble of the claim 1.
  • a dispenser monoblock for the automatic regulation of the pressure of air in an air tank, according to the preamble of the claim 1.
  • Such a dispenser is, for example, of the type normally used for powering an installation of compressed air distribution.
  • This valve normally called regulator of which a particular form of construction is described in the Italian patent IT-B-0 124 0865 filed in the name of the Applicant, is mounted on the suction mouth of the compressor and has the function of adjusting or to interrupt the flow of air from outside in according to the operating needs of the installation.
  • the suction regulator is essentially constituted by a cursor animated by an alternating rectilinear motion which is caused by the balancing effect between the action of thrust generated by the pressurized air taken from the circuit, and by the push action, in the opposite direction of the previous, generated by the outside air and by the action of resistance of one or more opposing springs.
  • the displacement of the metallic disk constituting the slider, relative to the fixed seat can be of two types, namely with proportional movement or with complete movement (Switching).
  • the cursor has an infinity of working positions and at each position corresponds a section of the well-defined passage of the suction duct of outside air, whereas in the second case only the extreme positions, which correspond to the two limit situations, total opening and closing complete the suction mouth.
  • valves that control the pressure of fluid i.e. valves that define the directions of priority in the network of pipes.
  • the object of the present invention is to provide a system that achieves the same result as the known circuits, but with notable simplifications mechanical and construction. This goal is achieved by through the characteristics of the party characterized in claim 1.
  • the monoblock according to the invention it is possible to generate a counter-pressure able to balance the action of negative thrust that engenders the mechanics of the pump during the proportional operation and during the vacuum operation.
  • the invention provides, thanks to the particular internal conformation of the monobloc, and providing the two external solenoid valves of an electronic card order, the possibility of make a gradual and not instantaneous stop compressor, so as not to damage the mechanics of the screw pump.
  • the suction regulator is equipped, on the suction mouth of the outside air and on the mouth of connection to the compressor, mobile fasteners, preferably flange.
  • Another characteristic of the invention lies in the possibility of creating a suction regulator of the type said "modular" where the same body of said regulator suction is likely to be equipped with another combination of flanged fasteners and dispensers monoblock. This allows you to achieve, quickly and with a outstanding economy, appliances meeting the requirements specific to each user.
  • the installation of compressed air production regulated by the distributor monoblock 001 according to the invention, consists essentially a suction regulator 002 that intercepts the air outside and route it to the screw compressor with oil bath 003, powered by an electric motor.
  • the mixture of fluid under oil / air pressure produced by the compressor enters a separation tank 004, where the separation of air and oil occurs.
  • the pressurized air will then fill the tank accumulator 005, waiting to be used, while the oil, after passing through the radiator 006, returns to compressor 003 in closed circuit.
  • the monobloc dispenser 001 powered by the pressurized air taken from the separator tank 004, via conduit 007, and controlled by the action of the two solenoid valves 008 and 009, is mounted on the body of the suction regulator 002 to adjust the operation, in a proportional or commutative manner, this to adjust and / or interrupt the flow of air from the outside according to the needs of installation, according to the modalities and schemes that are described in the following.
  • the monobloc dispenser 001 consists of a body 1, provided with a plurality of cavities in which the devices capable of performing the distribution action of compressed air control and a network of ducts that put said cavities in communication.
  • the body 1 in the body 1 are housed two valves to fixed discharge guided choke 2A and 2B, a valve with fast discharge 3, a control valve of the air injection 4 in the compressor screw, a control valve 5, two selector valves 6A and 6B and one calibrated nozzle 7.
  • the main conduit 111 supplies the discharge valve quick 3 and the valve 4 and, on this conduit, connect the conduits 112A and 112B which feed the respective valves 2A and 2B, and the conduits 113 and 114 which feed, at their turn, the corresponding solenoid valves 008 and 009, on which connect the ducts 115 and 116 which communicate with the corresponding valves 2A and 2B.
  • the conduit 116 is also connected by the branch 117 to the quick-release valve 3 from which leave the conduit 118 connected to the valve 6A and the conduit 119 provided with the setting 9, through the discharge port 101.
  • the valve 2B is placed in communication with the valve selector 6B through the conduit 120, which by the branch 121, is in communication with the pressure adjustment screw 8, through the discharge port 102 and the conduit discharge 119.
  • the conduit 122 puts the valve 2A in communication with the proportional control valve 5, from which the led 125 which, through the selector valve 6B, the conduit 126 and the discharge port 103, act on the cursor 022 which intercepts and regulates the suction mouth 021.
  • valve 4 is in connection with the screw compressor 003 through line 128, the orifice of discharge 104 and the non-return valve 10.
  • the function of the monobloc dispenser 001 is the closing the suction port 021 from the outside air by moving the cursor 022 of the suction regulator 002, to allow to put under pressure the air contained in the circuit.
  • a screw of minimum pressure setting 8 which, set by the operator, ensures a minimum air pressure value in the circuit and allows possible evacuation pressure by through conduit 119, intercepted by the screw of discharge setting 9, which communicates with the outside.
  • Switched type full load regulation (see Fig. 4), which includes the total displacement of the cursor 022 for the opening of the suction mouth 021, takes place in exciting the two solenoid valves 008 and 009 which, by via the discharge ducts 115 and 116 respectively, change the state of both valves with fixed throttling 2A and 2B.
  • Branch 117 Attacks Quick Discharge Valve 3, generating a counterpressure with respect to the duct principal 111.
  • a small 023 suction valve ensures the maintenance minimum air intake from the outside.
  • the quick-release valve 3 opens, so that the air, going through ducts 118 and 127, which communicate via the directional valve 6A, will feed the valve 4 which, therefore, allows the air from the main inlet duct 111, passing through the led 128 and the check valve 10, to return to the compressor 003 by realizing, in this way, a back pressure positive in the mechanics of the screw pump, in reducing wear, vibrations and resulting noises.
  • valve 3 further allows, by through conduits 007, 111 and 119, to unload the air contained in the air / oil separator 004 to the external environment, with the interposition of a filter, not shown, and which, in addition to the filtration action of way that said air can return to the circuit, limit the noises.
  • bypass 124 will feed through the valve selector 6A and the conduit 127, the valve 4 which maintains the positive action of back pressure in the mechanics of the screw pump, even during this phase.
  • Branch 123 is provided with the calibrated nozzle 7 which serves to balance the interaction between the valve proportional 5 and the displacement of the cursor 022.
  • the progressive stopping action of the compressor (see fig. 7) is done with the use of an electronic card which, simultaneously and in a progressive way, de-excites (closes) the solenoid valve 009 and excites (opens) the solenoid valve 008.
  • evacuation is carried out, progressive way, from the air of the monoblock dispenser to through the discharge ports 101, 102, 103, 104 and through the corresponding ducts 119, 121, 126, 128 until the compressor 003 stops.
  • Figs. 8-14 illustrate a possible form of practical realization of the monobloc dispenser according to the invention.
  • the monobloc dispenser according to the invention 001 constituted by a metallic element 1, of substantially parallelepipedal shape, mounted by means of screw 011 on the body of the suction regulator 002, provided with suction port 021 and connection flange 024 to the compressor.
  • the distributor monoblock 001 is fixed to the regulator 002, by pressing on a flat surface 025, where the inlet ports 119, 121, 126 and 128 are present, corresponding conduits 101, 102, 103 and 104, and the holes threaded 012 fixing said monobloc.
  • Partial section of the body of the suction regulator 002 allows to see the cursor 022 which plays the role of piston, the piston guide 026 which slides in the cylinder 027 and the return springs 028 and 029.
  • the fixed throttling valves 2A and 2B are equipped with two shuttle sliders 2A1 and 2B1 and actuated by the air.
  • Valves 3, 4 and 5 are operated by air and by the return springs 32, 42, and 52 and provided with a slider shuttle 33 and 43, or membrane 53, as well as stroke adjustment, 41 and 51 respectively.
  • the body of the regulator 002.1 is connected to the external pipe air inlet and compressor 003 with interposition removable fasteners 031 and 034, which go respectively replace the soldering attachment of the suction port 021 and the fixed flange 024 for connection to the aforementioned compressor.
  • the body of the pressure regulator 002.1 has at the entrance a plane surface 041, on which come to rely, by means of screws 042, the fasteners to flange 031.1A / 1B and 031.2A / 2B which respectively have their axis confused or perpendicular to the axis of the body.
  • both 031 flange 034 flanges have nominal diameters different, thus allowing to equip the same body of regulator 002.1 of different combinations of the same elements (see Fig. 20, 21), which makes it possible to use it on 003 compressors that have different operating characteristics.
  • the monoblock dispenser 001 is also removable from the regulator body 002.1, the benefits we get as well during assembly of the entire device only during operations normal maintenance or replacement of different components are obvious.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Compressor (AREA)
  • Harvester Elements (AREA)
  • Control Of Fluid Pressure (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Claims (10)

  1. Steuergerät in Monoblockausführung zur automatischen Drucksteuerung in einem Behälter für die Montage in einem Kreislauf zur Produktion von Druckluft, wobei der Kreislauf einen Ansaugregler (002) umfasst, einen Schraubenkompressor mit Ölbad (003), einen Behälter zur Luft/Öl-Trennung (004) und einen Sammelbehälter (005), wobei das Steuergerät dadurch gekennzeichnet ist, dass es aus einem einzigen Monoblock besteht, gebildet durch einen Metallkorpus (1), welcher mit Ausnehmungen zur Aufnahme zweier Ventile zur stationären Drosselung (2A, 2B), eines Ventils zur schnellen Entleerung (3), eines Ventils zur Steuerung der Luftzufuhr (4) in die Schraube des Kompressors, eines Ventils zur proportionalen Steuerung (5), zweier selektiver Ventile (6A und 6B) versehen ist, wobei diese Elemente durch Luft betätigt werden, welche von zwei Elektroventilen (008, 009) gesteuert wird, einer ebenfalls vorgesehenen Kalibrierungs-Düse (7), wobei die Ventile zur Steuerung, zur Kontrolle und zur Regelung der Luftmenge und des Luftdrucks über eine Mehrzahl von in dem Korpus angeordneten Leitungen und Abzweigkanälen (111 - 128) untereinander verbunden sind, wobei die Funktionsweise des Steuergerätes in Monoblockausführung (001) durch die Wirkung der beiden Elektroventile (008 und 009) erreicht wird, welche eine Steuerung des proportionalen oder kommutativen Typs ausführen.
  2. Steuergerät in Monoblockausführung nach Anspruch 1, dadurch gekennzeichnet, dass es von einer einzigen Leitung (007) über die Eintrittsöffnung (100) gespeist wird, welche die Druckluft aus dem Behälter zur Luft/Öl-Trennung (004) fördert.
  3. Steuergerät in Monoblockausführung nach Anspruch 1 und 2, dadurch gekennzeichnet, dass es vier Luft-Austrittsöffnungen (101, 102, 103, 104) besitzt.
  4. Steuergerät in Monoblockausführung nach Anspruch 3, dadurch gekennzeichnet, dass über die ersten und zweiten Austrittsöffnungen (101, 102) erste und zweite korrespondierende Leitungen (119, 121), welche mit einer Ablass-Stellschraube (9) bzw. einer Schraube zur Einstellung des Minimaldruckes (8) versehen sind, mit der äußeren Umgebung unter Zwischenschaltung eines Filters verbunden sind.
  5. Steuergerät in Monoblockausführung nach Anspruch 3, dadurch gekennzeichnet, dass eine dritte Leitung (126) über eine dritte Austrittsöffnung (103) die Verschiebung des Schiebers (022) steuert, welcher die Ansaugöffnung (021) des Ansaugreglers unterbricht.
  6. Steuergerät in Monoblockausführung nach Anspruch 3, dadurch gekennzeichnet, dass eine vierte Leitung (128) über eine vierte Austrittsöffnung (104), welche mit einer Rückschlagventilklappe (10) ausgerüstet ist, einen Gegendruck erzeugt, welcher geeignet ist, den negativen Druck, der sich in der Mechanik des Schraubenkompressors (003) während der Funktion des proportionalen Typs und während der Funktion der Evakuierung aufbaut, auszugleichen.
  7. Steuergerät in Monoblockausführung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es eine gedruckte Schaltung besitzt, mit der die Steuerung der Elektroventile (008, 009) erfolgen kann.
  8. Steuergerät in Monoblockausführung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es mit einem Ansaugregler (002.1) kombiniert ist, dessen Korpus unter Zwischenschaltung lösbarer Verbindungselemente (031, 034) mit den äußeren Rohrleitungssystemen verbunden ist.
  9. Steuergerät in Monoblockausführung nach Anspruch 8, dadurch gekennzeichnet, dass der Ansaugregler (002.1) nach dem Baukastenprinzip ausgebildet ist, so dass die Kombination lösbarer Verbindungselemente derart gestaltet werden kann, dass diese nominell verschiedene Dimensionen, Formen und Durchmesser (031.1A/B, 031.2A/B, 034.A, 034.B) aufweisen.
  10. Steuergerät in Monoblockausführung nach Anspruch 8, dadurch gekennzeichnet, dass die lösbaren Verbindungselemente (031, 034) mit einem Bajonettverschluss versehen sind.
EP98101239A 1997-01-28 1998-01-24 Steuergerät in Monoblockausführung zur automatischen Drucksteuerung in einem Druckluftbehälter Expired - Lifetime EP0855519B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9830671T SI0855519T1 (en) 1997-01-28 1998-01-24 Monoblock controller for automatically regulating the pressure in a reservoir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97VI000014A IT1292941B1 (it) 1997-01-28 1997-01-28 Distributore monoblocco per la regolazione automatica della pressione dell'aria in un serbatoio
ITVI970014 1997-01-28

Publications (3)

Publication Number Publication Date
EP0855519A2 EP0855519A2 (de) 1998-07-29
EP0855519A3 EP0855519A3 (de) 1999-07-28
EP0855519B1 true EP0855519B1 (de) 2004-04-21

Family

ID=11426246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101239A Expired - Lifetime EP0855519B1 (de) 1997-01-28 1998-01-24 Steuergerät in Monoblockausführung zur automatischen Drucksteuerung in einem Druckluftbehälter

Country Status (6)

Country Link
EP (1) EP0855519B1 (de)
AT (1) ATE265001T1 (de)
DE (1) DE69823246T2 (de)
ES (1) ES2219793T3 (de)
IT (1) IT1292941B1 (de)
SI (1) SI0855519T1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1307507B1 (it) * 1999-10-21 2001-11-06 Virgilio Mietto Regolatore automatico di aspirazione dell'aria in un serbatoio.
US6520205B1 (en) * 2000-08-22 2003-02-18 Ingersoll-Rand Company Compressor unloader system
ITVI20010086A1 (it) * 2001-04-19 2002-10-19 Virgilio Mietto Regolatore di aspirazione dell'aria compressa in un serbatorio
DE102006016317A1 (de) 2006-04-06 2007-10-11 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verdichteranordnung mit einer Ventileinheit im Ansaugbereich
CN101943165B (zh) * 2010-09-09 2012-07-04 无锡压缩机股份有限公司 移动螺杆压缩机的气控溢流系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2717224A1 (de) * 1977-04-19 1978-10-26 Mahle Gmbh Regeleinrichtung fuer drucklufterzeuger
DE3244414A1 (de) * 1982-12-01 1984-06-07 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zum trocknen von druckluft
DE69223325T2 (de) * 1991-10-14 1998-04-16 Cash Eng Res Einlassregelvorrichtung für verdichter
DE4404072C1 (de) * 1994-02-09 1995-02-16 Druckluft Dannoehl Gmbh Vorrichtung zum Erzeugen von Hochdruck-Stickstoff

Also Published As

Publication number Publication date
IT1292941B1 (it) 1999-02-11
EP0855519A2 (de) 1998-07-29
ES2219793T3 (es) 2004-12-01
DE69823246T2 (de) 2005-04-14
DE69823246D1 (de) 2004-05-27
EP0855519A3 (de) 1999-07-28
SI0855519T1 (en) 2004-10-31
ATE265001T1 (de) 2004-05-15
ITVI970014A1 (it) 1998-07-28

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