EP0633831A1 - Misch- und druckluftfördergerät. - Google Patents
Misch- und druckluftfördergerät.Info
- Publication number
- EP0633831A1 EP0633831A1 EP93907853A EP93907853A EP0633831A1 EP 0633831 A1 EP0633831 A1 EP 0633831A1 EP 93907853 A EP93907853 A EP 93907853A EP 93907853 A EP93907853 A EP 93907853A EP 0633831 A1 EP0633831 A1 EP 0633831A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- mixing
- air
- compressed air
- hydraulic
- 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
Links
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
- B28C5/0806—Details; Accessories
- B28C5/0831—Drives or drive systems, e.g. toothed racks, winches
- B28C5/085—Hydraulic drives
-
- 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
Definitions
- the invention relates to a mixing and compressed air conveying device, in particular for mortar or concrete as mixed and conveyed material, with a mixing tank, which can be loaded with the mixed and conveyed material, connected to a conveying line, contains a motor-driven agitator and can be acted upon with compressed air - Drive motor and a screw compressor which can be driven by the drive motor for generating the compressed air, the agitator being drivable by means of a hydraulic motor which can be pressurized with pressure oil via at least one hydraulic pump driven by the drive motor and together with this is arranged in a hydraulic circuit containing an oil cooler and an oil filter, and wherein the screw compressor is arranged in an oil / air tank with air separator and oil sump, an oil cooler and an oil filter containing lubricating and cooling oil circuit.
- Mixing and compressed air conveyors of this type are used in the construction industry for mixing and conveying thick matter such as mortar, screed, concrete or the like.
- the mixture for example consisting of sand and a binder, is fed to the mixing kettle through the addition of water through a filling opening. There, the mix is thoroughly mixed while the agitator is running.
- the lid of the mixing kettle is closed and compressed air is fed to the mixing kettle via the screw compressor. leads. Under the influence of the compressed air, the mixed and conveyed material is conveyed through the delivery line in the form of plugs separated from one another by compressed air cushions.
- the hydraulic power transmission between the drive motor and agitator has considerable advantages in terms of its freedom from wear, both in terms of service life and in the feasibility of a hydraulically controlled overload protection for motors and mixers (EP 367 912 AI).
- a hydraulic circuit with relatively complex components such as an oil tank, oil filter and oil cooler, is required for this.
- the known mixed and compressed air conveyors usually contain a screw compressor with oil injection cooling and lubrication.
- the screw compressor is arranged in a lubricating and cooling oil circuit which contains, inter alia, an oil / air container with an air separator and oil sump, an oil filter and an oil cooler.
- the invention is based on the object of improving the known mixing and compressed air conveying device of the type specified at the outset in such a way that a lighter design, less assembly and piping effort and less maintenance effort can be achieved.
- the solution according to the invention is based on the idea that the hydraulic circuit of the agitator drive and the lubricating and cooling oil circuit of the screw compressor can be combined to form a uniform hydraulic system despite the fundamentally different tasks.
- the hydraulic circuit of the agitator drive and the lubricating and cooling oil circuit of the screw compressor have a common oil tank, which is preferably formed by the oil sump of the oil / air container.
- a further simplification in this respect is achieved in that the hydraulic circuit and the lubricating and cooling oil circuit also have a common oil filter and / or oil cooler.
- a preferred embodiment of the invention provides that the hydraulic pump of the agitator drive can be acted upon directly on the suction side or with oil from the oil sump of the oil / air container of the screw compressor via a pre-compressor pump. If a pre-compressor pump is used, any air that is still contained in the sucked-in oil is separated before the oil is fed to the hydraulic pump. With the pre-compressor pump, the hydraulic oil is pre-compressed to 30 bar, for example, and the air contained in it is separated off. The separated air can be returned to the oil / air tank via a compressed air line. To improve the air separation, at least one air separation stage can additionally be provided in the oil / air container. can be seen, which can consist of perforated plates, of which several can be arranged one behind the other in the oil / air tank.
- the screw block of the screw compressor can be either an integrated or a separate component of the oil / air container.
- the hydraulic motor of the agitator drive is connected on the return side via the oil cooler and oil filter in the manner of a series connection to the lubricant and oil inlet of the screw compressor.
- the hydraulic motor of the agitator drive can open directly or indirectly via the oil filter and / or oil cooler into the oil / air container, while the screw compressor directly or indirectly via a further oil cooler and / or oil filter from the oil sump of the oil / air container with lubricant. and cooling oil can be applied.
- the hydraulic motor of the agitator drive it is also possible for the hydraulic motor of the agitator drive to open directly into the oil / air container on the return side, during the Screw compressor from the oil sump of the oil / air container with the interposition of the oil filter and / or oil cooler can be acted upon with lubricating and cooling oil.
- Figure 1 is a hydraulic circuit diagram of a mixing and compressed air conveyor.
- FIG. 2 shows a hydraulic circuit diagram of a mixing and compressed-air conveying device modified compared to FIG. 1;
- FIG. 3 shows a hydraulic circuit diagram of a further mixing and compressed air conveying device modified compared to FIG. 1.
- the mixing and conveying devices shown schematically in the drawing essentially consist of a mixing vessel 18, which can be fed with mixed material via the closable filling opening 10, is connected to a conveying line 12, contains an agitator 14 and can be pressurized with compressed air via the openings 16 preferably designed as a diesel engine drive motor 20, a screw compressor 22 which can be driven by the drive motor for generating the compressed air, and two hydraulic pumps 24, 26 which are driven jointly by the drive motor 20 and which are driven by a hydraulic motor. Hydraulic control block 28 act on a hydraulic motor 30 for driving the agitator 14 with pressure oil.
- the screw compressor 22 comprises a screw compressor 32 and an oil / air container 34 with compressed air separator 36 and oil sump 38.
- the screw compressor 32 is on the suction side via an air filter 40 and a shut-off throttle valve 42 with atmospheric air and via an injection line 44, 44 '. can be loaded with lubricating and cooling oil.
- the oil / air mixture emerging from the screw compressor under a pressure of 5 to 7 bar reaches the oil / air container 34 via a channel or a line 46.
- compressed air reaches the air inlet openings 36 via the air separator 36 and the compressed air line 46 16 and conveys the mixed and conveyed material located in the mixing container 18 in drops through the conveying line 12 to the outside.
- the hydraulic circuit leading to the hydraulic pump 30 and the lubricating and cooling oil circuit of the screw compressor are jointly supplied with oil from the oil sump 38 of the oil / air container. Likewise, only one oil cooler 50 and one oil filter 52 are provided for both oil circuits.
- the low-pressure side of the hydraulic pumps 24, 26 is connected directly to the oil sump 38 via the supply line 54, while in the embodiment according to FIG. 2 a pre-compressor pump 56 is arranged in the supply line 54, in which the Pre-compressed oil from the oil sump 38 to a pressure of approx. 30 bar and thereby from the air contained therein is freed.
- the compressed air separated in the pre-compressor 36 is returned to the oil / air tank via line 58.
- a cooler 50 'and an oil filter 52' are additionally arranged in the oil injection line 44 'branched off from the oil sump 38'.
- the oil sump is divided by an air separator 64 or a bulkhead into an entrance zone 60 and an exit zone 62. Thereby it is achieved that the air-laden oil coming into the oil / air container via the lines 46 and 48 is degassed at the air separating screen 64 or the bulkhead so that the exit zone 62 to which the lines 44, 44 'and 54 are connected are largely gas-free oil.
- the invention relates to a mixing and compressed air conveying device, in particular for mortar or concrete as mixed and conveyed material, with a material which can be mixed with the mixed and conveyed material and is connected to a conveying line 12
- Motor-driven agitator 14 containing and can be pressurized with compressed air mixing vessel 18, a drive motor 20 and a screw compressor 32 which can be driven by the drive motor for generating the compressed air.
- the agitator can be driven by means of a hydraulic motor 30 which can be pressurized with pressure oil via at least one hydraulic pump 24, 26 driven by the drive motor 20.
- the screw compressor 32 is arranged in a lubricating and cooling oil circuit containing an oil / air container 34 with an air separator 36 and an oil sump 38.
- the hydraulic circuit of the agitator drive and the lubricating and cooling oil circuit of the screw compressor 32 have a common oil tank formed by the oil sump 38 of the oil / air container and a common oil cooler 50 and oil filter 52 on.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Refuse Collection And Transfer (AREA)
- Fluid-Pressure Circuits (AREA)
- Nozzles (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4211139 | 1992-04-03 | ||
DE4211139A DE4211139A1 (de) | 1992-04-03 | 1992-04-03 | Misch- und Druckluftfördergerät |
PCT/EP1993/000764 WO1993019914A1 (de) | 1992-04-03 | 1993-03-30 | Misch- und druckluftfördergerät |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0633831A1 true EP0633831A1 (de) | 1995-01-18 |
EP0633831B1 EP0633831B1 (de) | 1996-09-11 |
Family
ID=6455935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93907853A Expired - Lifetime EP0633831B1 (de) | 1992-04-03 | 1993-03-30 | Misch- und druckluftfördergerät |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0633831B1 (de) |
AT (1) | ATE142553T1 (de) |
DE (2) | DE4211139A1 (de) |
WO (1) | WO1993019914A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50109837D1 (de) | 2000-01-27 | 2006-06-29 | Kaeser Kompressoren Gmbh | Verfahren und Vorrichtung zum Mischen und Fördern von Beton |
JP5649177B2 (ja) * | 2011-03-24 | 2015-01-07 | カヤバ工業株式会社 | ミキサドラム駆動装置 |
CN103174652B (zh) * | 2013-03-09 | 2015-08-12 | 宁德市优力维特电梯配件有限公司 | 一种螺杆空压机及其配套稀土永磁电机 |
CN106738317A (zh) * | 2016-12-13 | 2017-05-31 | 顾广才 | 一种高效水泥搅拌装置 |
DE102017104780A1 (de) | 2017-03-07 | 2018-09-13 | Putzmeister Engineering Gmbh | Druckloser Mischer mit Fördereinrichtung |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1240836A (fr) * | 1958-11-07 | 1960-09-09 | Ready Mixed Concrete Ltd | Installation de transmission de force hydraulique |
US3209850A (en) * | 1963-02-26 | 1965-10-05 | Gen Dynamics Corp | Trailer having longitudinally adjustable and driven rear wheels |
FR1374358A (fr) * | 1963-05-22 | 1964-10-09 | Richier Sa | Installation de malaxage à cuve fixe |
DE2302752C3 (de) * | 1973-01-20 | 1982-01-28 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Ringtrog-Zwangsmischer |
DE3013373C2 (de) * | 1980-04-05 | 1986-09-11 | Karl Dipl.-Ing. 7000 Stuttgart Schlecht | Misch- und Fördergerät |
DE8430087U1 (de) * | 1984-10-12 | 1985-01-10 | TEKA Maschinenbau GmbH, 6732 Edenkoben | Vorrichtung zum einfuehren von leitungen in ringtrogmischer |
DE3624832A1 (de) * | 1986-07-23 | 1988-01-28 | Teka Maschinenbau Gmbh | Vorrichtung zum antreiben eines zwangsmischers |
DE3836930A1 (de) * | 1988-10-29 | 1990-05-03 | Putzmeister Maschf | Misch- und druckluftfoerdergeraet |
-
1992
- 1992-04-03 DE DE4211139A patent/DE4211139A1/de not_active Withdrawn
-
1993
- 1993-03-30 DE DE59303765T patent/DE59303765D1/de not_active Expired - Fee Related
- 1993-03-30 WO PCT/EP1993/000764 patent/WO1993019914A1/de active IP Right Grant
- 1993-03-30 EP EP93907853A patent/EP0633831B1/de not_active Expired - Lifetime
- 1993-03-30 AT AT93907853T patent/ATE142553T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9319914A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4211139A1 (de) | 1993-10-07 |
DE59303765D1 (de) | 1996-10-17 |
WO1993019914A1 (de) | 1993-10-14 |
EP0633831B1 (de) | 1996-09-11 |
ATE142553T1 (de) | 1996-09-15 |
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