EP0037555B1 - Misch- und Fördergerät - Google Patents

Misch- und Fördergerät Download PDF

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Publication number
EP0037555B1
EP0037555B1 EP81102451A EP81102451A EP0037555B1 EP 0037555 B1 EP0037555 B1 EP 0037555B1 EP 81102451 A EP81102451 A EP 81102451A EP 81102451 A EP81102451 A EP 81102451A EP 0037555 B1 EP0037555 B1 EP 0037555B1
Authority
EP
European Patent Office
Prior art keywords
mixing
valve
compressor
shut
pressure
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
Application number
EP81102451A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0037555A2 (de
EP0037555A3 (en
Inventor
Karl Schlecht
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
Publication of EP0037555A2 publication Critical patent/EP0037555A2/de
Publication of EP0037555A3 publication Critical patent/EP0037555A3/de
Application granted granted Critical
Publication of EP0037555B1 publication Critical patent/EP0037555B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1223—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers discontinuously operating mixing devices, e.g. with consecutive containers
    • B28C5/123—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers discontinuously operating mixing devices, e.g. with consecutive containers with pressure or suction means for discharging
    • 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
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/026—Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • 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
    • F04C2210/00—Fluid
    • F04C2210/22—Fluid gaseous, i.e. compressible
    • F04C2210/221—Air

Definitions

  • the invention relates to a device according to the preamble of patent claim 1.
  • a shut-off valve is usually provided in the pressure line of the compressor, which is closed when the delivery from the mixing vessel is to be stopped (DE-A1 2 005 787). This results in an increase in the air pressure in the line in front of the shut-off valve or in a storage tank arranged in front of the shut-off valve.
  • Devices are also known in which a non-return valve is arranged between the storage boiler and the compressor and a pressure relief valve is arranged in front of the latter. This is particularly necessary for heavy piston compressors or screw compressors in order to reduce their power consumption when the compressed air supply has ended.
  • Devices with screw compressors are also known, which are shut off both on the pressure side and on the suction side when the mixing material conveyance is switched off.
  • the full air pressure is maintained on the pressure side of the compressor screw.
  • the power consumption is only reduced to about 70%.
  • the invention has for its object to avoid the aforementioned disadvantages to create a device of the type mentioned, which is very easy to use on the one hand, thereby avoiding the risk of incorrect operation, and on the other hand, the engine is relieved especially during the time, in which fresh aggregates are often added dry to the boiler mixer, so that the motor can be designed with significantly lower output.
  • the residual power consumption of the compressor during the mixing phase is reduced to a fraction of the value that is required for full air delivery against the final pressure when the suction line valve is closed and the delivery stopped.
  • the device is only operated by actuating the suction line valve or a vent valve arranged in the pressure line, while the throttles in the upper air line and the lower air line, which serve to distribute compressed air, only need to be set when the device is started up and then remain in this setting.
  • the motor 7 drives both the compressor 8 and, at the same time, the mixer shaft 2 of the mixing vessel 1 via the shaft 23.
  • the compressor 8 receives its air through the suction line 18, in which a shut-off valve 19 and a check valve 24 are arranged.
  • oil is injected on the suction side, which enters the housing of the compressor 8 via an oil circuit, not shown in the drawing, from the separator boiler 11 or from an oil cooler connected downstream thereof.
  • the oil-air mixture passes through a check valve 10 arranged in line 9 or a throttle downstream thereof or a pressure reducing valve into the separator tank 11, from whose filter cartridge 12 largely oil-free compressed air flows into the pressure line 13.
  • a throttle 16 or 17 is arranged, which can be adjusted by hand for the purpose of correct distribution of the compressed air.
  • the valve 19 arranged in the suction line 18 can be opened and closed by means of the adjusting cylinder 20 or by hand.
  • the mixer shaft 2 is driven by the shaft 21 of the motor 7, for example via the V-belt drive 22, the shaft 23 and the transmission 6.
  • the mixing kettle 1 has a mixture outlet 3, a cover 4 closing the filling opening and a vent valve 5.
  • the lid 4 and the vent valve 5 are closed and the suction line valve 19 is opened.
  • the air pressure then rises only slowly as a result of the pre-compression in the dead space and in the separator tank, which has the advantage that the mixing mechanism is not connected by a sudden compression of the material to be mixed whose sudden increase in consistency is overstressed or blocked.
  • screed in particular often has air pores that are highly liquefying when depressurized. However, these are compressed at a pressure of 1 to 2 atmospheres in such a way that they do not liquefy and the mixture, which is suddenly only moist with earth, is then difficult to stir. However, if the pressure increase is slow, the mix is loosened by one or more revolutions of the agitator before it is stiffened by the subsequent pressure increase. As soon as the delivery pressure drops when the mixing vessel is emptying, the suction line valve 19 is closed and the lid 4 is raised after the vent valve 5 has been opened. This stops the delivery of the compressor and on its pressure side there is a release of compressed air, which leads to a reduction in the power consumption of the compressor screw to the extent that no other control system can achieve, provided that the compressor has to continue rotating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Accessories For Mixers (AREA)
  • Compressor (AREA)
EP81102451A 1980-04-05 1981-04-01 Misch- und Fördergerät Expired EP0037555B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3013373A DE3013373C2 (de) 1980-04-05 1980-04-05 Misch- und Fördergerät
DE3013373 1980-04-05

Publications (3)

Publication Number Publication Date
EP0037555A2 EP0037555A2 (de) 1981-10-14
EP0037555A3 EP0037555A3 (en) 1983-03-16
EP0037555B1 true EP0037555B1 (de) 1985-07-03

Family

ID=6099421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102451A Expired EP0037555B1 (de) 1980-04-05 1981-04-01 Misch- und Fördergerät

Country Status (3)

Country Link
EP (1) EP0037555B1 (es)
DE (2) DE3013373C2 (es)
ES (1) ES501705A0 (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3836930A1 (de) * 1988-10-29 1990-05-03 Putzmeister Maschf Misch- und druckluftfoerdergeraet
DE3919838A1 (de) * 1989-06-17 1990-12-20 Putzmeister Maschf Verfahren und vorrichtung zur entsorgung von kontaminiertem bauschutt
DE4211139A1 (de) * 1992-04-03 1993-10-07 Putzmeister Maschf Misch- und Druckluftfördergerät
DE4301474A1 (de) * 1992-10-02 1994-04-07 Putzmeister Maschf Misch- und Fördergerät
PL172465B1 (pl) * 1992-10-02 1997-09-30 Putzmeister Maschf Urzadzenie mieszajaco-podajace PL PL PL PL PL

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069050B (es) * 1957-03-22 1959-11-12
DE1230704B (de) * 1958-03-19 1966-12-15 Rudolf Kalich Vorrichtung zum selbsttaetigen Mischen und Foerdern von hydraulisch erhaertenden Bindemitteln
DE1684458B1 (de) * 1966-08-12 1970-03-05 Schlecht Dipl Ing Karl Betonfoerdervorrichtung
DE2005787A1 (en) * 1970-02-09 1971-09-02 Rittmeier, Werner, 3400 Gottingen Mixing and transport plant for quicksettingplasters
DE2717224A1 (de) * 1977-04-19 1978-10-26 Mahle Gmbh Regeleinrichtung fuer drucklufterzeuger

Also Published As

Publication number Publication date
DE3013373C2 (de) 1986-09-11
DE3013373A1 (de) 1981-10-08
ES8202284A1 (es) 1982-02-01
EP0037555A2 (de) 1981-10-14
ES501705A0 (es) 1982-02-01
EP0037555A3 (en) 1983-03-16
DE3171189D1 (en) 1985-08-08

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