EP0724511B1 - A mixer - Google Patents

A mixer Download PDF

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Publication number
EP0724511B1
EP0724511B1 EP94930152A EP94930152A EP0724511B1 EP 0724511 B1 EP0724511 B1 EP 0724511B1 EP 94930152 A EP94930152 A EP 94930152A EP 94930152 A EP94930152 A EP 94930152A EP 0724511 B1 EP0724511 B1 EP 0724511B1
Authority
EP
European Patent Office
Prior art keywords
brake
mixing
vessel
scraper blade
scraper
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
EP94930152A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0724511A1 (en
Inventor
Iwer Dall
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.)
Skako AS
Original Assignee
Skako AS
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 Skako AS filed Critical Skako AS
Publication of EP0724511A1 publication Critical patent/EP0724511A1/en
Application granted granted Critical
Publication of EP0724511B1 publication Critical patent/EP0724511B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B28C5/16—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 the stirrers having motion about a vertical or steeply inclined axis
    • B28C5/166—Pan-type mixers
    • B28C5/168—Pan-type mixers with stirrers having planetary motion

Definitions

  • the invention concerns a mixer for a material, such as concrete, and comprising a stirring unit as well as a mixing vessel with a closable discharge opening.
  • a typical example of a mixer of this type is a concrete mixer.
  • aggregates usually in the form of stone and sand are first added, and then the cement is added under continued dry mixing. Finally, optional additives plus water are added, and the mixing process now continues as a wet mixing until the concrete mix has obtained the desired state ready for use. Until then, frequently about 2.5 minutes will have elapsed from the moment when filling was initiated.
  • the vertical shaft of the stirring unit pivotably mounts an ejector in the form of a rectangular plate which extends vertically from the bottom of the vessel up to the maximum height of the mixture.
  • the pivot shaft of the plate is located somewhere between the center of the mixing vessel and its side wall, there being provided a biassed spring which is so adapted as to try to pivot the plate outwardly transversely to the direction of rotation of the stirring unit.
  • the strength of the spring is not so great that it can overcome the resistance which the plate meets when it is driven through the material during the mixing process. During this process the plate is therefore automatically aligned in the direction of rotation.
  • the discharge opening in the bottom is opened, and the material then begins running out of the vessel in the normal manner.
  • the level of the material hereby gradually sinks below the upper edge of the plate, so that the pressure of the material on the plate successively decreases, thereby causing it to begin pivoting outwardly and to be transverse to the direction of rotation in the final phase where the vessel is empty or almost empty.
  • This structure can give a certain reduction in the discharge time with respect to the previously known art, but the time gained in this manner is relatively modest.
  • the reason is that the plate per se is only capable of contributing to emptying the vessel by degrees in step with the material sinking in the vessel. Only in the final phase when the vessel is empty or almost empty is the plate reasonably effective.
  • the plate During filling and initially also during the mixing process, the plate will almost be in the way and tend to increase the overall time required by the mixing process.
  • This problem is solved according to the invention by means of a scraper mechanism which is caused to describe an orbital movement about a central axis in the vessel by the stirring unit in operation and which is adapted to raise at least one scraper blade above the material during mixing and to lower it down into it during emptying.
  • This structure ensures that the scraper blade is entirely free of the material while the mixing vessel is filled and the material is mixed, so that this part of the process is in no way disturbed by the presence of the scraper blade.
  • This property is of decisive importance in particular when mixing takes place according to the counterflow principle. During emptying the scraper blade is effective from the beginning. The discharge time is hereby minimized.
  • the mixing vessel typically has a round side wall and a bottom which closes it downwardly.
  • the scraper blade in the lowered state forms a negative acute angle with a radius through the inner edge of the blade, and its outer edge is present at or in the vicinity of the side wall.
  • the scraper blade For the bottom to be scraped completely clean of residues, it is moreover expedient to position the scraper blade with its lower edge close to the bottom. Since the scraper blade is substantially transverse to the direction of rotation, it pushes the material along for each rotation. Owing to the negative acute angle with the radius, this material will simultaneously be pushed out toward the periphery, and when the scraper blade meets the discharge opening, which is usually positioned in an area at the side wall, the material drops out through this opening.
  • the blades of the mixing stars pass the center and thereby ensure that no residues are left in this area, even though the scraper blade itself does not extend beyond the center.
  • the scraper blade optionally in cooperation with conventional side scrapers, hereby ensures rapid and effective emptying and cleaning of the mixing vessel for each mixing cycle.
  • the stirring unit is based on a planet gear having a ring-shaped planet housing which is caused to rotate about a central axis by means of one or more motors during rotation.
  • This planet housing rotatably mounts mixing stars which are in gear wheel engagement with the stationary sun wheel of the planet gear and therefore rotate with respect to the planet housing when this rotates about the central axis.
  • the mixing stars carry blades which directly serve to mix the material.
  • the scraper mechanism may advantageously be provided on the ring-shaped planet housing. Then the scraper mechanism and thereby the scraper blade will follow the rotation of the planet housing and always be at an unchanging relative distance - seen in vertical projection - from the rotating mixing stars and their blades. Both the mixing stars and the scraper blade must have a great radius of action in order to be able to touch all the material during the mixing process and afterwards to be able to discharge it rapidly and effectively. The mixing blades and the scraper blade will therefore work close to each other. The above arrangement effectively ensures that the blades and the scraper mechanism with its scraper blade do not collide with each other in operation.
  • the scraper mechanism When the scraper mechanism is provided on the planet housing, it may have a lifting rod in a preferred embodiment which is pivotally journalled on a pivot provided on the planet housing. The other end of the lifting rod then carries the scraper blade, and a drive mechanism is operative between the planet gear and the lifting rod to pivot the lifting rod up and down between a lower discharge position and an upper free position.
  • This structure is simple and sturdy and is of a size permitting it to be easily incorporated in the restricted space between the mixing stars and the side scrapers.
  • the drive mechanism may be a pneumatic or hydraulic drive cylinder.
  • said mechanism consists of a combined rod and gear wheel connection which can be engaged and disengaged with the main gear wheel of the planet housing by a dynamic brake, thereby causing the scraper mechanism to lower and raise the scraper blade respectively.
  • the only component to be directly activated in this connection is the brake which is stationarily mounted on the mixing vessel. The brake can therefore easily be connected to a power supply, while it is somewhat more difficult to run a power supply to the above-mentioned pneumatic or hydraulic drive cylinder via the planet housing which is rotatably mounted in the mixing vessel.
  • the brake may be a pneumatic or hydraulic drive cylinder having a piston which, in the activated state, serves as a brake disc against another brake disc which is connected with the combined rod and gear wheel connection of the drive mechanism. In the activated state, the two brake discs transfer the necessary force by means of friction, whereby they simultaneously slidingly rotate with respect to each other.
  • a brake lining may advantageously be interposed between the brake discs.
  • a conventional hydraulic brake or a magnet brake may be used as a brake.
  • the drive mechanism may generally be characterized in that it must be adapted to lower the scraper blade toward the bottom of the mixing vessel upon braking and to raise the scraper blade to its upper position when braking ceases.
  • Figs. 1 and 2 show a concrete mixer which is generally designated 1.
  • This concrete mixer is of the type which is described in the applicant's European patent application 89 908 400.8 "A method and an apparatus for mixing materials".
  • the concrete mixer comprises a mixing vessel 2 having a side wall 3 and a bottom 4.
  • the mixing vessel serves to receive the material which is to be mixed, and which reaches the level N when the vessel is filled. Upwardly, the vessel is covered by a solid superstructure 5, which carries a stirring unit 6 and a central pipe 7 through which the materials to be mixed are fed to the mixing vessel. Further, the bottom 4 of the mixing vessel is formed with a discharge opening 8 (fig. 1) for removal of the mixed concrete.
  • the stirring unit is built on the basis of a planet gear 9 (fig. 2) having a ring-shaped planet housing 10 which is rotatably mounted on the superstructure 5.
  • a top plate 11, secured upwardly on the superstructure 5, mounts two motors 12, each of which is connected with a gear 13 having an output shaft 14 with a gear wheel drive 15 which engages an outer toothed rim 16 on the planet housing 10.
  • An isolating screen 17 for dampening the noise from the gear 13 is arranged around the gear 13.
  • Each output shaft 18 is mounted downwardly on the planet housing 10.
  • the lower end of each output shaft 18 carries a mixing star 21 having inclined downwardly directed arms 22 whose lower ends mount mixing blades 23 close to the bottom 4.
  • the planet housing 10 mounts side scrapers 24 which are pulled along the side wall 3 and serve to scrap off material that might stick to the side wall.
  • the motors 12 When the motors 12 are connected, they cause the ring-shaped planet housing 10 to rotate at a speed of rotation which is typically 10 revolutions per minute in the above European patent application. Simultaneously, the mixing stars 21 are caused to rotate against the flow in the direction shown by the arrows in fig. 1 because of the gear wheel engagement with the stationary sun wheel 20.
  • the mixing stars have slightly different diameters and correspondingly rotate at slightly different speeds of rotation with 43 and 48 revolutions per minute, respectively. This results in the greatest possible mixing efficiency, since the mixing blades pass beyond the center of the mixing vessel and get in contact with all the material present in the mixing vessel.
  • the mixing stars 21 have a considerable radius of action, and in combination with the side scrapers 24 they therefore restrict the space available in the vessel for incorporation of other components.
  • the mixing vessel 2 moreover accommodates a scraper mechanism 25 which is mounted on the planet housing 10 by means of a bracket 26.
  • the bracket has a pivot 27 about which a lifting rod 28 can pivot up and down.
  • a scraper blade 29, whose function will be described more fully below, is provided at the opposite end of the pivot 27 or the free end of the lifting rod 28.
  • a pneumatic or hydraulic drive cylinder 30 operates between the bracket 26 and the lifting rod 28. This drive cylinder is pivotally suspended from the bracket 26 by means of a pivot 31.
  • the piston rod 32 of the cylinder is simultaneously connected with a point on the lifting rod 28 by means of another pivot 33.
  • the pivot 31 of the drive cylinder is spaced above the pivot 27 of the lifting rod, so that the drive cylinder when activated will affect the lifting rod 28 with a torque around the pivot 27 and can thereby pivot the scraper 29 from the bottom position shown in fig. 2 to a position above the level of material N, and vice versa.
  • the motors 12 When a charge of materials is to be mixed to finished concrete, the motors 12 are connected first.
  • the motors hereby cause the planet housing 10 to rotate via the gear wheel engagement between the gear wheel drives 15 and the toothed rim 16 on the planet housing.
  • the side scrapers 24 are pulled along the side wall 3 of the mixing vessel at the same speed of rotation as the planet housing, and the mixing stars 21 with the mixing blades 23 are simultaneously caused to rotate with respect to the planet housing because of the gear wheel engagement between the gear wheel 19 of the mixing stars and the stationary sun wheel 20.
  • the scraper blade 29 has been lifted by the drive cylinder above the level N which the material reaches when the vessel is filled. In this position the scraper blade does not interfere with the mixing process, which can therefore proceed optimally.
  • the materials are fed through the central pipe 7. However, it is no condition of the present invention that the materials are fed in this manner.
  • Other embodiments of the concrete mixer structure may e.g. have side openings (not shown) for the introduction of the materials.
  • the aggregates stone and sand are added first and are dry mixed. Then cement is added with continued dry mixing, and finally optional additives as well as water is added, and then the total amount of material is wet mixed until the mix is ready for use.
  • the overall period of time spent on this part of the mixing cycle is typically about 2.5 minutes.
  • the discharge opening 8 is opened, and the drive cylinder 30 is activated. This initiates the discharge, which takes place without stopping the motors 12.
  • the side scrapers 24 and the mixing stars 21 therefore continue to work in the same manner as during the actual mixing process.
  • the drive cylinder 30 now activated pivots the lifting rod 28 downwardly so that the scraper blade 29 is forced down toward the bottom 4 of the mixing vessel 2, as shown in fig. 2.
  • the scraper blade 29 is now rotated in the concrete mix at the same speed as the planet housing 10.
  • the scraper blade acts as a kind of plough which pushes the concrete mix in front of it around, while the concrete mix is moved out toward the lateral wall.
  • the latter function is due to the fact that, as shown in fig. 1, the scraper blade 29 is positioned with an obliquely rearwardly directed inclination with respect to the direction of rotation, or at a negative angle a with respect to a radius through the inner edge of the scraper blade.
  • the usually stiff concrete mix has a very viscous consistency and can therefore normally be discharged only slowly from the mixing vessel. Now the emptying takes place as a combined process, during which the scraper blade cooperates with the side scrapers and the blades of the mixing stars.
  • the side scrapers pull down the concrete mix from the side wall 3 of the vessel, while the blades of the rotating mixing stars bring along the concrete mix, present above the central area of the bottom 4, in an outward direction, so that also this part of the concrete mix will be within the reach of the scraper blade 29, which therefore does not have to extend beyond the center.
  • the compressed air or oil must be fed to the drive cylinder via a rotatable pipe joint, since the entire scraper mechanism is mounted on the planet housing 10 which rotates with respect to the mixing vessel 2 in operation. It is relatively difficult to establish such a rotatable pipe joint, in particular when the central area of the concrete mixer is occupied by the central pipe 7 for the charging of the materials. This drawback is remedied by the embodiment of the scraper mechanism which is shown in figs. 3, 4 and 5.
  • the scraper blade 29 is arranged at the end of a lifting rod 28 capable of pivoting up and down about a pivot 27 on a bracket 26 which is firmly mounted on the planet housing 10. This entire part of the scraper mechanism is therefore rotated in the mixing vessel at the same speed of rotation as the planet housing.
  • the lifting rod 28 is pivotally connected via a pivot 46 with a connecting rod 34, which is in turn pivotally connected with a moment arm 35 via another pivot 47.
  • the moment arm 35 itself is moment-connected with a horizontal shaft 36 which is rotatably mounted in the planet housing 10.
  • a screw spring 37 is wound around the shaft 36 and is biassed by a spring force, which acts on the lifting rod 28 in the lifting direction via the moment arm 35 and the connecting rod 34 and has a sufficiently great strength to lift the scraper blade 29 above the level of material N.
  • a first toothed segment 38 is fixed on the end of the shaft 26 disposed opposite the moment arm 35 and engages a second toothed segment 39 which is fixed on the underside of a toothed rim 40.
  • This toothed rim 40 is in turn rotatably mounted on the planet housing 10 in an area below its toothed rim 16.
  • the toothed rim is formed with a slot 44 which extends concentrically with the toothed rim 40 and the planet housing 10.
  • a pin 45 which, as shown best in fig. 5, extends freely up into the slot 44, is moreover fixed on the planet housing 10.
  • the rotation of the toothed rim 40 with respect to the planet housing 10 is hereby restricted to an angle whose size is determined by the relative displacement of the pin 45 in the slot 44 being stopped by the slot ends 44a and 44b, respectively.
  • a vertical shaft 41 is rotatably mounted on a stationary part of the mixing vessel.
  • a gear wheel 42 engaging the toothed rim 40 is secured on the lower end of this shaft.
  • the upper end of the shaft 41 is affected by a dynamic brake 43.
  • this brake is mounted on the top plate 11 which forms a fixed component of the mixing vessel 2.
  • the brake 43 with associated parts therefore do not participate in the rotation of the planet housing 10 in operation.
  • the brake consists of a pneumatic or hydraulic drive cylinder 48 having a piston 49 which can be moved axially up and down in the cylinder 48, but is fixed against rotation with respect to it by means of a key and keyway connection 53.
  • the piston 49 is pushed up into the upper end of the cylinder 48 by a compression spring 52.
  • the piston serves as a first brake disc 49.
  • the upper end of the shaft 41 is shaped as a second brake disc 50 having a brake lining 51.
  • the drive cylinder receives compressed air or oil via a conduit 55 which is connected with the drive cylinder by means of a union 54. Further, a valve 56 is inserted into the conduit 55.
  • the brake described above may also be arranged in the manner that the piston or the first brake disc is mounted axially slidably, but fixed against rotation on the upper end of the shaft 36, while the second brake disc is stationarily secured in the drive cylinder.
  • the drive cylinder shown in fig. 4 is single-acting with a compression spring 52 for the return movement. Instead, a double-acting cylinder may be used for displacing the piston in both directions.
  • brakes In addition to the brake structure described above, also other brake types may be used, e.g. hydraulic brakes or magnet brakes.
  • the brakes must be dynamic in all cases. They must therefore e.g. have two brake discs, one of which is to be mounted fixed against rotation in the brake and the other fixed against rotation on the shaft 41. When the brake is activated, and the brake discs have hereby been engaged mutually, they must be capable of transferring a sufficiently great frictional moment to drive the scraper blade 29 via the scraper mechanism down through a concrete mix in the vessel to its bottom 4 against the action of the screw spring 37.
  • a brake moment similarly enabling a mutual movement between two brake parts can also be obtained in other ways, e.g. by means of a pump in a liquid circuit which is throttled when the brake is to be activated.
  • the discharge opening 8 in the bottom 4 of the vessel is opened, and also the valve 56 is opened, so that the piston or the first brake disc 49 is moved down to frictionally touch the brake lining 51 on the second brake disc 50.
  • the two brake discs are now pressed against each other by a pressure which is determined by the pressure over the first brake disc 49 and its diameter.
  • the braking moment is transferred via the second brake disc 50, the shaft 41 and the gear wheel 42 to the toothed rim 40. This stops the rotation of the toothed rim 40 with respect to the planet housing 10, which continues to rotate.
  • the scraper blade has been present in its upper position over the level of material N. This position is always maintained when the brake is not activated.
  • the biassed screw spring 37 will then have rotated the moment arm 35 in a clockwise direction (fig. 5) and will thereby have lifted the pivotable rod 28 and thus the scraper blade 29 above this level via the connecting rod 34.
  • the first toothed segment 38 has simultaneously been rotated clockwise, so that the toothed rim 40, because of the toothed engagement between the first and the second toothed segments 38, 39, has been rotated counterclockwise with respect to the planet housing 10 until the pin 45 hits the end 44a of the slot 44.
  • the first toothed segment now rotates counterclockwise because of the toothed engagement with the second toothed segment 39 on the toothed rim 40, so that the scraper blade 49 is lowered to the bottom 4 of the vessel against the spring force of the screw spring 37.
  • the lifting height of the scraper blade is determined by the length of the slot 44.
  • the scraper blade 29 is maintained in its upper position by means of a passive force applied by the biassed screw spring 37 when the brake is not activated. This is the case when the concrete mixer stands still and during the part of the working cycle where charging and mixing takes place. The scraper mechanism uses no energy during this.
  • the brake when the brake is activated, the scraper blade is driven down to its lower position by means of an active force which is transferred from the planet gear and thereby from the motors 12. In this connection the brake just acts as a servomechanism.
  • a particular advantage obtained by means of this second embodiment of the scraper mechanism is that it is only necessary to feed power to the brake in order to activate the scraper mechanism. Since the brake is stationarily mounted with respect to the mixer, the cumbersome rotatable pipe joint required in order to feed power to the first scraper mechanism embodiment shown in figs. 1 and 2 is avoided.
  • the scraper mechanism of the invention provides a considerable reduction in the time it takes to empty the mixing vessel completely. This time can be reduced further by mounting two or more scraper mechanisms in the mixing vessel instead of just one.
  • the invention has been exemplified above by means of a concrete mixer. However, the invention may be applied in connection with many other mixers and for many other materials where rapid and complete emptying of the mixing vessel is desired.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Confectionery (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Vehicle Body Suspensions (AREA)
  • Disintegrating Or Milling (AREA)
EP94930152A 1993-10-21 1994-10-20 A mixer Expired - Lifetime EP0724511B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK1183/93 1993-10-21
DK931183A DK118393D0 (da) 1993-10-21 1993-10-21 Blandemaskine
DK118393 1993-10-21
PCT/DK1994/000388 WO1995011120A1 (en) 1993-10-21 1994-10-20 A mixer

Publications (2)

Publication Number Publication Date
EP0724511A1 EP0724511A1 (en) 1996-08-07
EP0724511B1 true EP0724511B1 (en) 1998-07-29

Family

ID=8101919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94930152A Expired - Lifetime EP0724511B1 (en) 1993-10-21 1994-10-20 A mixer

Country Status (8)

Country Link
EP (1) EP0724511B1 (da)
AT (1) ATE168924T1 (da)
AU (1) AU7936894A (da)
CA (1) CA2174639A1 (da)
DE (1) DE69412115T2 (da)
DK (2) DK118393D0 (da)
ES (1) ES2121233T3 (da)
WO (1) WO1995011120A1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106179013A (zh) * 2016-09-09 2016-12-07 青岛迪凯机械设备有限公司 一种行星式轮碾搅拌机

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010004517A (ko) * 1999-06-29 2001-01-15 진찬호 콘크리트 믹서기
DE102009016897B4 (de) * 2009-04-08 2017-07-13 Vorwerk & Co. Interholding Gmbh Aufsatzteil für ein Gefäß
PL2558260T3 (pl) 2010-04-16 2015-09-30 Simem S P A Mieszalnik planetarny do produkcji betonu
US10041213B2 (en) 2014-11-06 2018-08-07 Richard Giles System and method for roadway maintenance and repair
DE102014117509A1 (de) * 2014-11-28 2016-06-02 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Vorrichtung zur Aufbereitung und Kühlung von Gießereiformsand
CN106827239B (zh) * 2017-02-14 2019-03-29 中恒建设集团有限公司 一种市政公路修筑用水泥砂浆制备装置
US10625227B2 (en) 2018-02-13 2020-04-21 Green Shield Products, Llc Mixer apparatus for mixing a high-viscosity fluid
FR3079770B1 (fr) 2018-04-09 2020-03-27 Skako Concrete Appareil de malaxage pour materiaux humides ou secs, notamment de composants pour la fabrication de beton
US10329719B1 (en) 2018-05-28 2019-06-25 Richard P Giles Composition and method for surface repair
CN110883944B (zh) * 2019-12-03 2021-06-29 安徽中坤节能新材料有限公司 一种干粉砂浆立式防离析设备
CN112356288A (zh) * 2020-11-13 2021-02-12 衡阳市泰盛环保建材有限公司 一种改进型水泥砂浆搅拌装置
CN112405853B (zh) * 2020-11-18 2023-02-10 合肥市日月新型材料有限公司 一种方便测量混凝土含水率的搅拌装置
CN112606201B (zh) * 2020-12-15 2022-06-17 莒县鼎力商品混凝土有限公司 一种混凝土制备系统及制备方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109632A (en) * 1959-09-15 1963-11-05 Wilhelm Eirich And Gustav Eiri Mixers
DE1683819B2 (de) * 1966-02-07 1977-06-02 Fetur Patentverwaltungsanstalt, Vaduz Austragvorrichtung fuer ringtrogmischer fuer baustoffe, insbesondere beton
DE2122371A1 (de) * 1971-05-06 1972-11-16 Techag Anstalt für Maschinen- u. Metallkonstruktionen, Vaduz Betonmischer
FR2527939B1 (fr) * 1982-06-04 1985-12-06 Couvrot Laine Cie Malaxeur a cuve fixe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106179013A (zh) * 2016-09-09 2016-12-07 青岛迪凯机械设备有限公司 一种行星式轮碾搅拌机

Also Published As

Publication number Publication date
ATE168924T1 (de) 1998-08-15
AU7936894A (en) 1995-05-08
EP0724511A1 (en) 1996-08-07
DK0724511T3 (da) 1999-05-03
DK118393D0 (da) 1993-10-21
DE69412115D1 (en) 1998-09-03
WO1995011120A1 (en) 1995-04-27
DE69412115T2 (de) 1999-03-11
CA2174639A1 (en) 1995-04-27
ES2121233T3 (es) 1998-11-16

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