SU1701557A1 - Device for the activation of cement and technique applied - Google Patents

Abstract

This invention relates to a construction technique for activating a cement slurry and will increase the degree of cement activation. A method for activating a cement slurry involves feeding the cement slurry and creating cavitation zones while rotating the blades, the supersuspension space is evacuated. Each cavitational gon is created in the plane perpendicular to the axis of the valg of the blades, v. communicated with the supersuspension space at the exit of the rotating blades from the cement slurry. A device for activating a cement slurry comprises a housing 1, a shaft 2 with blades 4, loading and unloading nozzles 6.7. It is equipped with vacuum system. The housing 1 is made with an oval cross section. The blades 4 are made in the form of wedge-shaped plates with longitudinal grooves. The shaft 2 is located inside the housing 1 horizontally. 1 hp ff, 3 ill. cl

Description

sl sl xj

Inventions include :; For construction equipment, you may be interested in activating cement suspensions in the process of preparing concrete demolition.

The invention is an increase in the degree of cement activation.

FIG. 1 shows a device for activating a cement slurry; FIG. 2 is a section A-A in FIG. on Fig.Z - kvvitatsiok-on the blade.

The device for the cement slurry ahtachtion is sealed, the body 1 has an oval cross section. In the lower part there is a drive, horizontal shaft 2, on which are supported the 3 strut with ZiCanna ;. blades 4. Racks 3 are located along a helical line to ensure the dynamic equilibrium of shaft 2. Blades 2 on the links 3 are fixed on different horizontal levels,

For sale | ; Alternate :: -;: - Ј: the destruction of the walls and the bottom of the housing 1 when creating a cavitating mode; the shaft 2 with the blades 4 is set so that the trajectories of the blades 4 pass 100-150 mm from the bottom of the housing 1.

The axis of the shaft 2 can pass through the point of the lower focus of the cross section of the housing 1.

When moving the blades 4 at a linear speed of 30 m / s or more, the distance is less than 100 mm PP / :: hl :: -; t -. the potential of ionic erosion is capacious; i,, prr p; -n; one hundred: / more than 150 mm and all lower points are involved in the kmt- tional zone. The bottom surface of the housing 1 can b-; P 1 .. wic; linearly stepped. In place rchho.pa blades 4 of the suspension due to ezyln;, transverse section of the body 1 scrapping susg en; l ;; / | they continue moving not along CKpyjiCHocTi i, but tangentially and then freely and prevent the creation of a mass movement of the suspension by ycTOMH / iiiiorc KpyruЈ 0ro. JK- O CTb -: i zygylm-energy s-form: LINE / DNO :: i S8CH8g 1 PLASTIN WITH SUSAGULA HW aepius sHbi of the wedge in the direction of the light 4. K; ; the plate has grooves 5 in the transverse direction of movement of the plate. CAPACITY 1 /: ievt nozzles loading and unloading 5.7. Through pipe 8, the water supply capacity with an avacun pump (shaft drive -, aaivVv - pump is not shown).

The method for extracting a cement slurry is as follows.

Suspension is supplied to housing 1. Nadsuspensiones- ;. CTRU cancer is simply vacuumed.

The low-pass shaft 2 with mpastlmi j is transmitted from the drive torque. -. When the blades rotate the blades 4. completely immersed in the suspension, r, 0oa ;; tirot; : Hg.;, Pyo-cavitation

zones in which the dispersion of cement grains. Creating a mode in which cavitation cavities are formed communicating with the supra-fluid part of the evacuated vessel and cavitation zones inside the suspension increases the degree of cement activation, both by dehydrating the cement particles and by crushing the active surface of the cement. The suspension entering the housing 1 is first processed in closed cavitation zones, and then as the suspension progresses, the crushed grains are released

5 from the air envelope and thereby the cement capacity is significantly increased; hydration.

When moving in a solution of a wedge-shaped blade 4, its transverse grooves generate

0 hydroacoustic oscillations up to 10 kHz. The oscillations spread throughout the entire volume of the solution and facilitate the movement of air bubbles into the zone of cavitation cavities with reduced pressure.

5When the blades 4 rotate, whose span is higher than the slurry level, air-liquid cavitation cavities are formed at the inlet and outlet of the solution, communicating with the evacuated over-fluid part of the housing 1. In this mode, not only is the destruction of the grain centers. coping in a cavitational zone with reduced pressure, but an intensive suction of air bubbles is also carried out.

5 with cement particles. The transition of the blade 4 from Hizd environment to the air and vice versa can lead to the unbalance of the mechanical system, the occurrence of vibration.

In order to provide a dynamic balance of the shaft 2 and the device as a whole, and thus to create a robust and efficient construction of the rack 3 with blades 4, it is impractical to position it on the shaft 2 along a helical line so that

5, in the upper part of the housing 1 there was the same number of blades 4. In addition, at the interface of the shaft 2 and the housing 1 there is an elastic gasket. Also, elastic gaskets are applied when installing the housing 1 on the Fun0 Dament.

A device for activating a cement slurry works as follows.

Case 1 is filled with an initial portion of cement slurry through pipe 6 at

5 to the closed pipe 7 to the level at which a part of the blades 4, when they are in the upper position, will be completely immersed in the suspension. The housing 1 is sealed, connected to a vacuum system and an ox drive 2 is switched on. After 5-10 minutes from the lid-pipe 7, and then the suspension is fed continuously. Portion activation of cement can also be carried out.

Claims (3)

1. A method of activating a cement suspension, including feeding a cement suspension and creating cavitation zones during rotation of the blades, characterized in that, in order to increase the degree of cement activation, the super-suspension space is evacuated, and each cavitation zone is created in a plane perpendicular to the shaft axis of the blades, and communicate with the supersuspension space at the exit of the rotating blades from the cement slurry. 2. A device for activating cement pi suspension, comprising a case, a drive shaft located therein with cavitation blades, loading and unloading pipes, which is characterized by the fact that, in order to increase the degree of activation of cement, the case is made with an oval cross section a nozzle for connection with the ampli fi cator system, and the blades in the form of a wedge-shaped prominent plates, the lateral working surface of which has longitudinal grooves, the shaft being installed horizontally and its axis parallel to the axis of the housing. 3. The device according to claim 2, characterized by the fact that the lower surface of the body is stepped, and the shaft axis passes through the lower focus of the oval of the cross section of the body. Aa FIG. 2 Fig.Z