EP0386432A2 - Dispositif de commande pneumatique - Google Patents

Dispositif de commande pneumatique Download PDF

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Publication number
EP0386432A2
EP0386432A2 EP19900101470 EP90101470A EP0386432A2 EP 0386432 A2 EP0386432 A2 EP 0386432A2 EP 19900101470 EP19900101470 EP 19900101470 EP 90101470 A EP90101470 A EP 90101470A EP 0386432 A2 EP0386432 A2 EP 0386432A2
Authority
EP
European Patent Office
Prior art keywords
bellows cylinder
way valve
line
control valve
ejector
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.)
Granted
Application number
EP19900101470
Other languages
German (de)
English (en)
Other versions
EP0386432B1 (fr
EP0386432A3 (fr
Inventor
Harald Dipl.-Ing. Backes
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0386432A2 publication Critical patent/EP0386432A2/fr
Publication of EP0386432A3 publication Critical patent/EP0386432A3/fr
Application granted granted Critical
Publication of EP0386432B1 publication Critical patent/EP0386432B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor

Definitions

  • the invention relates to a pneumatic control device according to the preamble of the main claim.
  • Such control devices have the disadvantage that the bellows cylinder does not automatically return to the starting position due to its design. External restoring forces are necessary for this, which delays rapid control.
  • control device with the characterizing features has the advantage that the control of the bellows cylinder can be carried out easily and quickly, in particular the bellows cylinder can be quickly returned to its starting position.
  • control device An embodiment of the control device is explained in more detail in the following description and drawing.
  • the latter shows a schematic representation of a pneumatic control device for a bellows cylinder.
  • 10 denotes a bellows cylinder, which is able to assume an extended position a 1 and a retracted position a 4.
  • a line 11 opens into its underside, in which an unlockable check valve 12 is arranged shortly before the bellows cylinder.
  • the line 11 opens at a pressure-actuated 3/2 control valve 13, behind which it continues to an ejector 14.
  • a control line 15 or 16 opens at the two ends of the control valve 13, the control line 15 opening into a line 17 which starts from a 5/3-way valve 18.
  • the line 17 opens at the control valve 13.
  • the control line 16 starts from a line 19 which on the one hand opens into an unlockable check valve 12 and on the other hand starts from a line 20 which is also connected to the directional control valve 18.
  • the line 20 leads through the ejector 14 and opens into the atmosphere.
  • a nozzle 21 is arranged in the ejector 14, at which the line 11 opens.
  • a check valve 22 which can open in the direction from the control valve 13 to the ejector 14.
  • the directional control valve 18 is also pressure-actuated via lines 24 and 25 opening at its two end faces.
  • a pressure spring 26 and 27 also act on the directional control valve 18 from each of these sides.
  • the line 24 leads to a 3/2-way control valve 28 which can be adjusted against the force of a spring 30 by a button 29 which can be actuated by the bellows cylinder 10.
  • the line 24 leads from the control valve 28 to a 3/2-way control valve 31 which can be actuated arbitrarily via a button 32 against the force of a spring 33.
  • the line 24 starts from a pressure medium source 34.
  • the two control valves 28, 31 serve to "lift" the bellows cylinder, which will be discussed later.
  • the line 25 leads to a 3/2-way control valve 36 which also has a button 37 which can be actuated by the bellows cylinder and which is adjustable against the force of a spring 38.
  • the line 25 leads further to a 3/2-way control valve 39, which can be arbitrarily adjusted against the force of a spring 41 via a button 40.
  • the line 25 leads to a pressure medium source 42.
  • a pressure medium source 43 is likewise connected to the directional control valve 18; there are two connections 44, 45 to the atmosphere.
  • the button 32 on the control valve 31 is actuated so that it is switched to its flow position I.
  • Compressed air now flows via the control valve and the line 24 to the control valve 28, which is switched to switch position II by the spring 30.
  • Compressed air now flows further via line 24 and switches directional control valve 18 into its switching position I. This allows compressed air from pressure medium source 43 to penetrate lines 15 and 17. Due to the pressure in line 15, the control valve 13 is switched to switch position I, so that compressed air can now penetrate via line 17 into line 11 and the opening check valve 12 into the bellows cylinder 10, which is now filling.
  • the button 32 of the directional control valve 31 is then released, whereupon it reaches its switch position II, so that compressed air can no longer flow via the line 24 to the directional control valve 18. This will now switched by the spring 27 to the central position II, the control valve 28 brought into position II by the button 10 actuated by the bellows.
  • the "lower" switch position is initiated. This is done by pressing the button 40, whereby the control valve 39 is switched to the switching position I. At this time, the control valve 36 is in position I due to the action of the spring 38. Now compressed air from the pressure medium source 42 can reach the directional control valve 18 via the line 25 and the control valve 36 and bring it into the switching position III. Compressed air now flows from the pressure medium source 43 into the lines 19, 20 and 16. The pressure in the line 16 brings the control valve 13 into its circuit II, while the check valve 12 is raised by the pressure in the line 19. As a result, compressed air can reach the ejector 14 from the bellows cylinder 10 via the check valve 12, the control valve 13 and the check valve 22 which now opens.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP90101470A 1989-03-10 1990-01-25 Dispositif de commande pneumatique Expired - Lifetime EP0386432B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907779A DE3907779A1 (de) 1989-03-10 1989-03-10 Pneumatische steuereinrichtung
DE3907779 1989-03-10

Publications (3)

Publication Number Publication Date
EP0386432A2 true EP0386432A2 (fr) 1990-09-12
EP0386432A3 EP0386432A3 (fr) 1991-05-08
EP0386432B1 EP0386432B1 (fr) 1993-09-15

Family

ID=6376013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101470A Expired - Lifetime EP0386432B1 (fr) 1989-03-10 1990-01-25 Dispositif de commande pneumatique

Country Status (2)

Country Link
EP (1) EP0386432B1 (fr)
DE (2) DE3907779A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001056796A1 (fr) * 2000-01-31 2001-08-09 Koenig & Bauer Aktiengesellschaft Dispositif pour vider et remplir un tuyau flexible soumis a l'action d'un fluide de travail
CN108001665A (zh) * 2017-12-08 2018-05-08 南京航空航天大学 一种浮空器气囊高效充气装置及其工作方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435339C2 (de) * 1994-10-01 2003-06-05 Bosch Rexroth Ag Anordnung zur Ansteuerung eines hydraulisch betätigbaren Hauptventils
DE102022127264A1 (de) * 2022-10-18 2024-04-18 ADVENATE GmbH Entlüftungsgerät

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2145619A1 (de) * 1971-09-13 1973-04-05 Vdo Schindling Steuervorrichtung fuer einen doppeltwirkenden pneumatischen oder hydraulischen servomotor
US4784040A (en) * 1987-08-18 1988-11-15 Caterpillar Inc. Control system for expelling liquid from a pneumatic actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001056796A1 (fr) * 2000-01-31 2001-08-09 Koenig & Bauer Aktiengesellschaft Dispositif pour vider et remplir un tuyau flexible soumis a l'action d'un fluide de travail
CN108001665A (zh) * 2017-12-08 2018-05-08 南京航空航天大学 一种浮空器气囊高效充气装置及其工作方法

Also Published As

Publication number Publication date
EP0386432B1 (fr) 1993-09-15
DE59002684D1 (de) 1993-10-21
DE3907779A1 (de) 1990-09-13
EP0386432A3 (fr) 1991-05-08

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