WO1994018453A1 - Ensemble pompe a vide - Google Patents

Ensemble pompe a vide Download PDF

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Publication number
WO1994018453A1
WO1994018453A1 PCT/EP1993/003589 EP9303589W WO9418453A1 WO 1994018453 A1 WO1994018453 A1 WO 1994018453A1 EP 9303589 W EP9303589 W EP 9303589W WO 9418453 A1 WO9418453 A1 WO 9418453A1
Authority
WO
WIPO (PCT)
Prior art keywords
ejector
compressed air
pump
pressure
vacuum
Prior art date
Application number
PCT/EP1993/003589
Other languages
German (de)
English (en)
Inventor
Dieter Bergemann
Original Assignee
Putzmeister-Werk Maschinenfabrik 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 Putzmeister-Werk Maschinenfabrik Gmbh filed Critical Putzmeister-Werk Maschinenfabrik Gmbh
Priority to JP6517559A priority Critical patent/JPH08506398A/ja
Priority to DE59307092T priority patent/DE59307092D1/de
Priority to KR1019950703147A priority patent/KR100307938B1/ko
Priority to EP94903814A priority patent/EP0682751B1/fr
Publication of WO1994018453A1 publication Critical patent/WO1994018453A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
    • B28C5/4203—Details; Accessories
    • B28C5/4234—Charge or discharge systems therefor
    • B28C5/4244—Discharging; Concrete conveyor means, chutes or spouts therefor
    • B28C5/4258—Discharging; Concrete conveyor means, chutes or spouts therefor using pumps or transporting screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type

Definitions

  • the invention relates to a vacuum pump device for the evacuation of the housing of a peristaltic pump that can be used as a thick matter feed pump and that is installed on a road vehicle that is equipped with on-board devices for generating compressed air for operation, e.g. a compressed air brake system of the vehicle and / or other compressors that can be carried on the vehicle or installed on the vehicle, as well as a vacuum pump unit, to the suction side of which the housing of the peristaltic pump is connected as a recipient.
  • a vacuum pump device for the evacuation of the housing of a peristaltic pump that can be used as a thick matter feed pump and that is installed on a road vehicle that is equipped with on-board devices for generating compressed air for operation, e.g. a compressed air brake system of the vehicle and / or other compressors that can be carried on the vehicle or installed on the vehicle, as well as a vacuum pump unit, to the suction side of which the housing of the peristaltic pump is connected as a recipient.
  • vacuum pump devices The purpose of such vacuum pump devices is to partially accelerate the regression of the circular cross-sectional shape of the pump hose, after it has been pressed against a housing wall by the squeeze rollers of the pump rotor and thereby squeezed together, by partially evacuating the housing of the peristaltic pump, in order to achieve the maximum as quickly as possible Intake and delivery cross-section to achieve the appropriate shape of the hose again (DE 36 07 836 AI).
  • the pump unit to which the housing of the peristaltic pump is connected as a recipient, is usually designed as a displacement pump, for example as a capsule pump, which has a pump rotor for driving either its own - electrical or hydraulic Drive motor or a gear that can be engaged and disengaged is provided, via which a drive coupling of the pump rotor to a power take-off of the vehicle engine is possible if necessary.
  • a displacement pump for example as a capsule pump, which has a pump rotor for driving either its own - electrical or hydraulic Drive motor or a gear that can be engaged and disengaged is provided, via which a drive coupling of the pump rotor to a power take-off of the vehicle engine is possible if necessary.
  • the vacuum pump unit is designed as an ejector which works on the principle of the jet pump, which is preferably designed as an air jet pump, the propellant gas jet of which can be branched off from the compressed air provided by the compressor.
  • the ejector provided as a vacuum pump unit which, in a design and functional arrangement known per se, consists of a driving nozzle that can be connected to the pressure outlet of the compressor, a catch nozzle that forms the outlet of the ejector, and a mouth opening that is adjacent to one another as seen in the flow direction of the compressed air the housing containing the propellant nozzle and the catching nozzle, to which the housing of the peristaltic pump to be evacuated can be connected as a recipient, is a structurally very simple functional element which is correspondingly inexpensive to manufacture or commercially available and since it does not contain any moving parts , is not subject to any significant wear and therefore does not require any maintenance work.
  • a check valve As a valve responding to the pressure difference between the recipient and the ejector, a check valve is suitable which, in a simple design of the vacuum pump device, is designed as a flap valve which responds to very small values of the pressure difference of only a few milibars and between them Function positions can be switched reliably.
  • an overflow valve controlled by the outlet pressure of the compressed air source and blocking the compressed air flow to the ejector is provided between the outlet of the compressed air source and the compressed air inlet of the air jet ejector, If the output pressure of the compressed air source drops and / or falls below an adjustable or fixed predetermined threshold value, then, as is provided in a further embodiment of the vacuum pump device, the air flow output of the ejector is counter the ambient atmosphere by means of a response to the pressure difference between the ejector outlet and the ambient atmosphere.
  • the valve can be shut off, which is controlled into its open position by a relatively higher pressure at the outlet of the ejector than the ambient pressure and which, when the pressure difference falls below a minimum value, reaches its locked position, also possible if the compressed air source fails or a pressure drop at the outlet thereof in the housing of the hose squeezing pump still maintain a minimum vacuum - at least for a limited time
  • This pressure-sensitive valve too, which blocks the ejector on the outlet side from the ambient pressure, and thus, when the ejector is shut off on the inlet side by a response of the overflow valve, also shuts off the housing of the peristaltic pump from the ambient atmosphere.
  • a 3/3-way valve which is connected directly upstream of the compressed air inlet of the ejector and which supports the drive nozzle connection from a first flow position in which a compressed air flow path leading from the compressed air source to the ejection nozzle of the ejector of the ejector, however, is shut off from the surrounding atmosphere, via a blocking position, in which the driving nozzle connecting piece of the ejector is shut off both against the compressed air outlet of the compressed air source and against the surrounding atmosphere, can be controlled in a second flow position, in which the ejector's nozzle connection with the surrounding If the atmosphere is connected and is blocked against the compressed air outlet of the compressed air source, the housing of the peristaltic pump can be ventilated via the ejector if necessary, whereby the housing of the peristaltic pump is ventilated when the vacuum pump device is switched off.
  • this can also be achieved by providing a 3/3-way valve which is directly upstream of the housing of the peristaltic pump and which has a first flow position in which the recipient Forming housing of the peristaltic pump connected to the vacuum chamber of the ejector and at the same time is locked against the ambient atmosphere, via a locking position in which both the recipient and the vacuum chamber of the ejector are locked against the ambient atmosphere, in a second flow position - a ventilation position is switchable, in which the recipient is in communicating connection with the surrounding atmosphere, but is blocked off from the vacuum chamber of the ejector, which in this configuration remains in communicating connection with the surrounding atmosphere via the trap nozzle.
  • Such 3/3-way valves can be designed as simple, manually operable 3-way valves with L-plug.
  • Low-noise operation of the vacuum pump device can be achieved in a simple manner by means of a conventional type of silencer connected downstream of its ejector.
  • FIG. 1 shows a block diagram of a vacuum pump device with an air jet ejector as a vacuum pump unit and a shut-off valve and connected between it and the recipient
  • FIG. 2 shows a vacuum pump device with an air jet ejector as a vacuum pump unit and a shut-off valve connected downstream thereof, in a block diagram representation corresponding to FIG. 1.
  • the vacuum pump device serves to generate a negative pressure in the housing 11 of a thick matter feed pump designed as a peristaltic pump, overall designated 12, by means of which the expansion of the pump hose 13 on both sides of the pumping operation promoted its length extending pinch point and thereby the flow of material to be pumped into the pump 12 is to be facilitated.
  • a peristaltic pump designed as a peristaltic pump, overall designated 12
  • an essentially circular disk-shaped rotor 16 is rotatably mounted about its central axis 14 and can be rotated, for example via the power take-off of the engine of a construction vehicle (not shown), on which the peristaltic pump together with other devices , for example a concrete mixer and / or a placing boom for concrete is mounted.
  • Two pinch rollers are freely rotatably mounted on the rotor about axes of rotation 19 and 21 which are parallel to the central axis 14 of the pump 12 and are arranged at the same distance from the central axis 14 at an azimuthal distance of 180 ° on the rotor.
  • a support wall 24 Arranged within the housing 11 of the pump 12 is a support wall 24, which extends between the pump inlet 22 and the pump outlet 23 and coaxially surrounds the rotor on a 180 "circumferential area and is fixed between the side walls of the pump housing 11 and the shape
  • the pump hose between the support wall 24 and the two pinch rollers 17 and 18 is alternating Grip the tube 13 on the inside of the support wall, squeezed together, the pinch point 27 migrating from the pump inlet 22 over the inner circumferential region of the support wall 24 to the pump outlet 23 and the material to be conveyed thereby being pushed through the pump hose 13.
  • an air jet ejector designated as a whole by 28, is provided, which is one of a compressed air jet passing through a flow arrow 31 is represented, an inlet-side driving nozzle 32 through which a driving jet flows and an exit-side catching nozzle 33, and an orifice 34 and 36 of the driving nozzle 32 or the catching nozzle 33, which, seen in the direction of flow of the driving jet 31, contains one another and delimits a vacuum chamber 37 Housing 29 with a suction connector 38., to which via an inlet check valve 39 and a 3-way valve 41 the chamber 42 of the peristaltic pump 12 delimited by the housing 11 of the peristaltic pump 12 can be connected as a recipient.
  • the compressed air flow passed through the ejector 28 in the evacuation mode of the ejector 28 and the pump chamber 42 connected to its suction port 38 is generated by a compressor 43 which is provided as an on-board unit of the vehicle and also for the compressed air supply to the compressed air braking system of the vehicle Stuff serves.
  • This compressor 43 is driven by the engine of the vehicle, while the peristaltic pump 12 can be driven via a power take-off of the drive unit of the vehicle that can be switched on and off, not shown.
  • a pressure-controlled overflow valve 47 is connected, which releases the passage of a compressed air flow from the compressed air outlet 44 of the compressor 43 to the inlet 46 of the ejector 28 as long as the output pressure of the compressor is greater than a defined threshold value of, for example, 8 bar, but blocks this flow path as soon as the output pressure of the compressor 43 drops below this threshold value.
  • the propellant air jet 31 emerging at high speed at the inner mouth opening 34 of the propellant nozzle which, viewed in the direction of flow of the propellant jet 31, has a continuously tapering flow cross section, tears air in the vacuum chamber 37 of the ejector 28 into the catch nozzle 33 of the ejector 28, which is transported together with the propellant air flow 31 to the compressed air outlet of the ejector 28 formed by the outer mouth opening 48 of the trap nozzle, where, due to a design of the trap nozzle which widens in the direction of flow, the speed of the emerging air flow mes is significantly reduced.
  • the catch nozzle 33 has a flow cross section which initially tapered and then widened again towards the outer mouth opening 48, which is significantly larger than that in the area of the outer opening 48 clear cross-section of the compressor-side, outer opening 46 of the driving nozzle in order to achieve a clear calming of the air flow exiting at the outlet 48 of the ejector 28, which, in order to reduce the operating noise, is also passed through a silencer 49 connected downstream of the ejector 28 becomes.
  • the check valve 39 provided between the intake port 38 of the ejector 28 and the 3-way valve 41, which is expediently arranged on the housing 11 of the peristaltic pump 12, is designed as a flap valve which, at very low pressure differences, between the check valve 39 the vacuum chamber 37 of the ejector and the chamber 42 of the squeeze pump housing 11 forming the recipient transitions into its open or locked position, this flutter valve 39 being caused by slightly higher pressure in the vacuum chamber 37 of the ejector 28 than in the recipient 42 in its Locked position is maintained and is switched to its open position by relatively higher pressure in the chamber 42 of the pump housing 11 than in the vacuum chamber 37 of the ejector 28.
  • the flap valve 39 which comes into its blocking position when the propellant air jet is exposed and the pressure increase in the vacuum chamber 37 of the ejector connected with it, provided that the 3-way valve is in its - shown - evacuation position at the same time Maintain negative pressure in the connected recipient.
  • the 3-way valve 41 is designed as a valve with a rotatable L-plug, which conveys the function of a 3/3-way valve which, from a first - shown - flow position, in which the pump housing 11 can be evacuated can be switched to a second flow position, the ventilation position, in which the evacuable chamber 42 of the peristaltic pump 12 can be switched via a blocking position, in which the pump housing 11 is blocked off both from the ambient atmosphere and from the ejector 28 is connected directly to the surrounding atmosphere via the tap 41.
  • a vacuum pump device 10 * 'suitable for evacuating the housing chamber 42 accommodating the rotor 16 and the delivery hose 13 of a peristaltic pump is assumed that its functional elements - compressor 43 , Overflow valve 47, 3-way valve 41, ejector 28, flutter valve 39 and silencer 49 with the correspondingly designated functional elements of the embodiment shown in FIG.
  • the suction nozzle 38 of the ejector 28 is connected directly to the evacuable chamber 42 of the housing 11 of the peristaltic pump 12; the 3-way valve 41 is between the overflow valve 47 and Ejector 28 is switched, and the flutter valve 39, which is used here as an output check valve of the ejector 28, is connected between the ejector 28 and the silencer 49.
  • the recipient 42 is ventilated via the 3-way valve 41 and the drive nozzle 32 of the ejector 28, which - with the delivery valve 39 closed - by means of the 3-way valve with the um ⁇ atmosphere can be connected.
  • the outlet pressure of the compressor 43 is between 6 and 8 bar
  • the compressed air flow used as the jet of the ejector 28, based on normal conditions has an amount of 200 1 / min.
  • the amount of air that can be conveyed from the recipient 42 in this configuration of the vacuum pumping devices 10, 10 'at the beginning of the evacuation operation is then approx. 150 1 / min, in the stationary operating state of the pump device 10, 10 'in the recipient 42 a negative pressure which has an absolute value of approx. 0.2 to 0.3 bar.
  • the vacuum pump unit 28 on its suction side is that Housing 11 of the peristaltic pump 12 is connected as a recipient, designed as an ejector working according to the principle of the steam jet pump, the driving air jet of which can be branched off from the compressed air generated by means of the compressor 43 of the vehicle brake system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structural Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

Dans un ensemble pompe à vide pour faire le vide dans le carter (11) d'une pompe péristaltique (12) qui est montée sur un véhicule routier avec un système de freinage à air comprimé et peut être utilisée comme pompe de refoulement de béton, l'ensemble pompe à vide (28), au côté aspiration duquel est relié comme récipient le carter (11) de la pompe péristaltique (12), se présente comme un éjecteur travaillant selon le principe de la pompe à jet d'air, dont le jet d'air peut être dérivé de l'air comprimé produit par le compresseur (43) du système de freinage du véhicule.
PCT/EP1993/003589 1993-02-05 1993-12-17 Ensemble pompe a vide WO1994018453A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6517559A JPH08506398A (ja) 1993-02-05 1993-12-17 真空ポンプ装置
DE59307092T DE59307092D1 (de) 1993-02-05 1993-12-17 Vakuum-pumpeinrichtung
KR1019950703147A KR100307938B1 (ko) 1993-02-05 1993-12-17 진공펌프장치
EP94903814A EP0682751B1 (fr) 1993-02-05 1993-12-17 Ensemble pompe a vide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4303319.9 1993-02-05
DE4303319A DE4303319A1 (de) 1993-02-05 1993-02-05 Vakuum-Pumpeinrichtung

Publications (1)

Publication Number Publication Date
WO1994018453A1 true WO1994018453A1 (fr) 1994-08-18

Family

ID=6479711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/003589 WO1994018453A1 (fr) 1993-02-05 1993-12-17 Ensemble pompe a vide

Country Status (6)

Country Link
EP (1) EP0682751B1 (fr)
JP (1) JPH08506398A (fr)
KR (1) KR100307938B1 (fr)
DE (2) DE4303319A1 (fr)
ES (1) ES2107803T3 (fr)
WO (1) WO1994018453A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29909987U1 (de) 1999-06-09 1999-09-09 Richter, Siegfried, Dipl.-Ing. (FH), 88605 Sauldorf Mit Druckluft betriebene Saugdüse
WO2002018855A1 (fr) 2000-09-01 2002-03-07 Katsuzo Somura Procede et appareil de production de glace stereoscopique sous forme d'une sphere, transparente ou analogue
DE20205068U1 (de) 2002-03-30 2002-08-29 FESTO AG & Co., 73734 Esslingen Druckluft-Schalldämpfer
DE10357320A1 (de) * 2003-12-05 2005-06-30 Crane Process Flow Technologies Gmbh Schlauchpumpe mit Vorrichtung zur Vakuumerzeugung
TWI334918B (en) * 2004-02-17 2010-12-21 Panasonic Corp Combustible refrigerant-processing system and method
NL2000167C2 (nl) * 2006-07-28 2008-01-29 Bredel Hose Pumps B V Peristaltische pomp.
JP4821926B2 (ja) * 2010-11-29 2011-11-24 ソニー株式会社 信号処理装置及び信号処理方法
JP2015132180A (ja) * 2014-01-10 2015-07-23 東亜工業株式会社 チューブポンプ
DE102017203877A1 (de) * 2017-03-09 2018-09-13 Polytec Plastics Germany Gmbh & Co. Kg Geschaltete Saugstrahlpumpe
JP7372869B2 (ja) * 2020-03-31 2023-11-01 新明和工業株式会社 吸引車

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB669809A (en) * 1949-09-15 1952-04-09 Glacier Co Ltd Improvements in or relating to pumps
US3421447A (en) * 1966-10-26 1969-01-14 Challenge Cook Bros Inc Fluid pump
FR2239362A1 (en) * 1973-08-03 1975-02-28 Eta Sa Vehicle driven by I.C. engine - exhaust pipe is connected to tank to inspire fluid using exhaust vacuum
DE3607836A1 (de) * 1986-03-10 1987-09-17 Wibau Ag Transport-, misch und foerderkombination zur herstellung und aufrechterhaltung der mischqualitaet breiiger massen, insbesondere zementbeton

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431188A1 (de) * 1984-08-24 1986-03-06 Linnhoff & Thesenfitz Maschinen- und Anlagenbau GmbH, 8754 Großostheim Rotationsschlauchpumpe
DE3703124A1 (de) * 1987-02-03 1988-08-11 Manfred Streicher Schlauchpumpe
US5007803A (en) * 1989-09-28 1991-04-16 Global Pumps, Inc. Air operated vacuum pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB669809A (en) * 1949-09-15 1952-04-09 Glacier Co Ltd Improvements in or relating to pumps
US3421447A (en) * 1966-10-26 1969-01-14 Challenge Cook Bros Inc Fluid pump
FR2239362A1 (en) * 1973-08-03 1975-02-28 Eta Sa Vehicle driven by I.C. engine - exhaust pipe is connected to tank to inspire fluid using exhaust vacuum
DE3607836A1 (de) * 1986-03-10 1987-09-17 Wibau Ag Transport-, misch und foerderkombination zur herstellung und aufrechterhaltung der mischqualitaet breiiger massen, insbesondere zementbeton

Also Published As

Publication number Publication date
EP0682751B1 (fr) 1997-08-06
ES2107803T3 (es) 1997-12-01
JPH08506398A (ja) 1996-07-09
KR100307938B1 (ko) 2001-11-30
DE59307092D1 (de) 1997-09-11
EP0682751A1 (fr) 1995-11-22
KR960700413A (ko) 1996-01-20
DE4303319A1 (de) 1994-08-11

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