SU885041A1

SU885041A1 - Mixer

Info

Publication number: SU885041A1
Application number: SU792871553A
Authority: SU
Inventors: Евгений Ильич Кромский; Сергей Николаевич Киселев
Original assignee: Челябинский Политехнический Институт Им.Ленинского Комсомола
Priority date: 1979-11-11
Filing date: 1979-11-11
Publication date: 1981-11-30

Description

Изобретение относится к промышленности строительных материалов, а именно к устройствам для приготовления бетонных смесей.The invention relates to the building materials industry, and in particular to devices for preparing concrete mixtures.

Известно устройство для перемешивания бетонных смесей, содержащее корпус, внутри которого размещен лопастной вал с при- ⁵водом его вращения и вибровозбудителем [1].A device for mixing concrete mixtures, comprising a housing inside which is placed a shaft with paddle pri- ⁵ vodom its rotation and exciter [1].

Ниболее близким к предлагаемому является смеситель, содержащий корпус, в котором расположен полый вал с имеющими кронштейны лопатками, магнитострикцион- ₁₀ный вибратор и привод вращения вала [2).Closest to the proposed is a mixer containing a housing in which a hollow shaft with blades having brackets, a magnetostrictive _10th vibrator and a shaft rotation drive is located [2].

Общим недостатком известных устройств является невысокое качество бетонных смесей.A common disadvantage of the known devices is the low quality of concrete mixtures.

Цель изобретения — повышение качества бетонных смесей. 15The purpose of the invention is improving the quality of concrete mixtures. fifteen

Указанная цель достигается тем, что смеситель, содержащий корпус, в котором расположен полый вал с имеющими кронштейны лопатками, магнитострикцонный вибратор и привод вращения вала, снабжен расположенным параллельно основному допол- W нительным полым валом с лопатками и волноводом, выполненным в виде коаксиально расположенного в нем стержня, причем маг- нитострикционный вибратор размещен в полости основного вала, а лопатки дополнительного вала соединены со стержнем посредством кронштейнов и смонтированы по его длине с шагом, равным или кратным длине полуволны колебаний вибратора.This goal is achieved by the fact that the mixer, comprising a housing in which a hollow shaft with blades having brackets is located, a magnetostrictive vibrator and a shaft rotation drive, is provided with a parallel additional hollow shaft with blades and a waveguide arranged in the form of a coaxially located in it rod, moreover, a magnetostrictive vibrator is placed in the cavity of the main shaft, and the blades of the additional shaft are connected to the rod by means of brackets and are mounted along its length with a step equal to or a multiple of the half-wavelength of vibrations of the vibrator.

На фиг. 1 изображен смеситель, общий вид; на фиг. 2 — выполнение волновода.In FIG. 1 shows a mixer, a general view; in FIG. 2 - the implementation of the waveguide.

Смеситель содержит корпус I, в котором расположен полый вал 2 с лопатками 3 и размещенным в его полости магнитострикционным вибратором 4. Смеситель снабжен расположенным параллельно основному дополнительным полым валом 5с лопатками 6 и волноводом, выполненным в виде коаксиально расположенного в нем стержня 7, причем лопатки 6 соединены со стержнем 7 посредством кронштейнов 8 и смонтированы по его длине с шагом, равным или кратным длине полуволны колебаний вибратора. Валы 5 и 2 приводятся во вращение от двух синхронизирующих шестерен 9. На другом конце вала 5 расположено волноводное вращающееся сочленение 11, соединяющее его с генератором СВЧ-энергнн, а на конце вала 2 — вращающее контактное устройство (ВКУ). 10 для подвода энер-The mixer comprises a housing I in which a hollow shaft 2 with blades 3 and a magnetostrictive vibrator 4 located in its cavity is located. The mixer is equipped with parallel to the main additional hollow shaft 5 with blades 6 and a waveguide made in the form of a rod 7 coaxially located in it, and the blades 6 connected to the rod 7 by means of brackets 8 and mounted along its length in increments equal to or a multiple of the half-wavelength of vibrations of the vibrator. The shafts 5 and 2 are driven by two synchronizing gears 9. At the other end of the shaft 5 there is a waveguide rotating joint 11 connecting it to the microwave energy generator, and at the end of the shaft 2 there is a rotating contact device (VKU). 10 for supplying energy

гии к магнитострикционному вибратору 4. В полом валу 5 выполнены окна 12 из диэлектрика, в которых закреплены лопатки 6.gii to the magnetostrictive vibrator 4. In the hollow shaft 5, the windows 12 are made of dielectric, in which the blades 6 are fixed.

Высота h рабочей части лопатки 6 определляется соотношениемThe height h of the working part of the blade 6 is determined by the ratio

где λ -длина волы в воздухе;where λ is the length of the ox in the air;

£ -диэлектрическая проницаемость смеси.£ is the dielectric constant of the mixture.

В связи с избирательным поглощением электромагнитной энергии бетонной смесью СВЧ-колебаниями создается возможность разрушать гидратные пленки при меньших затратах мощности магнитострикционного вибратора и доводить разрушение микрокомочков цемента до полного их разрушения.In connection with the selective absorption of electromagnetic energy by a concrete mixture by microwave oscillations, it is possible to destroy hydrated films at a lower cost of power of a magnetostrictive vibrator and to bring the destruction of cement micro-lumps to their complete destruction.

Применение предлагаемого смесителя позволяет значительно повысить качество бетонных смесей.The use of the proposed mixer can significantly improve the quality of concrete mixtures.

Частота СВЧ-колебаний 1000...3000 мГц. Устройство работает следующим образом. Включают привод вращения валов. Ос-'*’ новной вал 2 излучает в бетонную смесь электромагнитную энергию, что позволяет ¹⁵при СВЧ-колебаниях направленно воздействовать на связи, формирующие прочность новообразований при гидратации и цементных агрегатов. В центральной зоне смесителя (пространство между смесительными , ₂q валами) лопатки при вращении валов перекрывают друг друга, поэтому обрабатываемая смесь находится здесь под одновременным воздействием СВЧ-энергии и ударных волн магнитострикционного вибратора. .The frequency of microwave oscillations is 1000 ... 3000 MHz. The device operates as follows. Turn on the shaft rotation drive. Os - '*' the new shaft 2 emits electromagnetic energy into the concrete mixture, which allows ¹⁵ when microwave oscillations to directionally affect the bonds that form the strength of tumors during hydration and cement aggregates. In the central zone of the mixer (the space between the mixing, ₂ q shafts), the blades overlap each other during rotation of the shafts, so the processed mixture is here under the simultaneous influence of microwave energy and shock waves of a magnetostrictive vibrator. .

Разупрочненные соединения (теперь уже 15 хлопья) разрушаются ударной волной магнитострикционного вибратора. При этом смесь непрерывно перемешивается, все время заменяя проработанные объемы смеси новыми, и повторно и многократно вновь воздействуя на обработанные локальные объемы.The softened joints (now 15 flakes) are destroyed by the shock wave of a magnetostrictive vibrator. In this case, the mixture is continuously mixed, constantly replacing the worked-out volumes of the mixture with new ones, and repeatedly and repeatedly affecting the processed local volumes.

Claims

(54) MIXER The invention relates to the building materials industry, namely to devices for preparing concrete mixes. A device for mixing concrete mixes is known, comprising a housing inside which a vane shaft is placed with a drive for its rotation and an exciter (1. The closest one to the present invention is a mixer comprising a housing with hollow shaft with brackets, magnetostrictive vibrator and a rotation drive shaft 2. A common drawback of the known devices is the low quality of concrete mixes. The purpose of the invention is to improve the quality of concrete mixes. This goal is achieved by the fact that the mixer, The holding body, in which a hollow shaft with blades with brackets is located, a magnetostrictive vibrator and a shaft rotation drive, is provided with an additional hollow shaft parallel to the main one with blades and a waveguide made in the form of a rod located coaxially in it, the magnetostrictive vibrator is placed in the cavity of the main shaft, and the blades of the additional shaft are connected to the rod by means of brackets and mounted along its length with a clamp equal to or a multiple of the half-wave length of the vibrator vibrations . FIG. 1 shows a mixer, a general view; in fig. 2 - waveguide execution. The mixer includes a housing 1, in which a hollow shaft 2 with blades 3 and a magnetostrictive vibrator 4 placed in its cavity is located. The mixer is provided with an additional hollow shaft 5c parallel to the main blades 6 and a waveguide made in the form of a rod 7, and the blades 6 connected to the rod 7 by means of the brackets 8 and mounted along its length with a clamp equal to or a multiple of the half-wavelength of the vibrator vibrations. Shafts 5 and 2 are rotated by two synchronizing gears 9. At the other end of the shaft 5 there is a waveguide rotating joint II, which connects it to the microwave generator, and at the end of shaft 2 - a rotating contact device (ICU) 10 for power supply to the magnetostrictive vibrator 4. In the hollow shaft 5, windows 12 are made of a dielectric in which the blades 6 are fixed. The height h of the working part of the blade 6 is determined by the ratio h -. - length of oxen in the air; - dielectric constant The frequency of microwave oscillations is 1000 ... 3000 MHz. The device works as follows. The shaft drive is turned on. The main shaft 2 emits electromagnetic energy into the concrete mix, which, with microwave oscillations, allows a directional effect on the bonds that form the strength of the tumors during hydration and cement aggregates. In the central zone of the mixer (the space between the mixing shafts), the blades during rotation of the shafts overlap each other, therefore the mixture being processed is under the simultaneous influence of microwave energy and shock waves of the magnetostrictive vibrator. . The softened compounds (now flakes) are destroyed by the shock wave of the magnetostrictive vibrator. At the same time, the mixture is continuously stirred, all the time of replacement, the worked volumes of the mixture with new ones, and repeatedly and repeatedly affecting the treated local volumes. In connection with the selective absorption of electromagnetic energy by the concrete mixture by microwave oscillations, it is possible to destroy the hydrated films at lower cost of the power of the magnetostrictive vibrator and to bring the destruction of the microentrum cement to their complete destruction. The use of the proposed mixer allows to significantly improve the quality of concrete mixes. Claims of invention A mixer comprising a housing in which a hollow shaft with blades with arms is located, a magnetostrictive vibrator and a shaft rotation drive, characterized in that (in order to improve the quality of concrete mixes, the shaft is provided parallel to the main additional hollow shaft with blades and a waveguide made in the form of a rod coaxially located in it, the magnetostriction vibrator is placed in the cavity of the main shaft, and the blades of the additional shaft are connected to the rod by means of and mounted along its length with a step equal to or a multiple of the half-wavelength of the vibrator vibrations.Sources of information taken into account in the examination 1. Authors certificate of the USSR No. 371075, class B 28 C 5/16, 1971.

2. USSR author's certificate No. 398398, class: B 28 C 5/16, 1972.: S $

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