US2021092A - Improved method and means for incorporating a fluid to a stream of a fluid or of a pulverulent solid - Google Patents

Description

Nov. 12, 1935. J. A. M. TELIET 2,021,092

IMPROVED METHOD AND MEANS FOR INCORPORATING A FLUID TO A STREAM OF A FLUID OR OF A PULVERULENT SOLID Filed Feb. 1, 1952 o a double suction-pump eifect within a closed Patented Nov. 12, 1935 UNITED STATES.

IMPROVED METHOD AND FOR IN- CORPORATING A FLUID TO A STREAM OF A FLUID OR OF A PULVERULENT SOLID Jean Antoine Marcel Tliet, Arcueil, France Application February 1,1932, Serial No. 590,265 In France February 9, 1931 2 Claims. (or 83-73) My invention has for its object a method and means which allow the incorporation'of a fluid (or if required of two or more fluids) to a stream of another fluid or of a pulverulent solid, through mixer casing, the shape of the mixer casing being such thatit produces practically the physical phenomenon consisting in the formation inside a cylindrical duct through which. the first fluid is forced, of a zone wherein the fluid is stationary whereby the path of the fluid is sub stantially frusto-conical. v

My invention finds in particular its application in cement guns and the like apparatuses for projecting moist concrete wherein a current of pulverulent concrete urged by the compressed air is projected outwardly after it has been moistened. The mixture of the water with the pulverulent concrete should be very intimate so as to form after interpenetration a homogeneous fluid vein of a substance and not a mere mixture of the components (cement, sand and gravel water). This intimate mixture is not properly obtained with the apparatuses now in use which provide in fact a dispersion of the free component materials, with the consequent material loss and reduction of the contents. The device according to my invention which may be adapted to the concreteprojectors now in use, produces this mixture through a double suc tion effect arising under the action of the con- Crete stream itself. Tothis end this stream passes first inside the tube through the centre J of a first annular container fed with the fluid to be incorporated and allowing it to escape in the direction of progress of the stream. Then the stream widens over a central duct also fed fluids if twofluids are to be'incorporated to the stream. I

I have described hereinbelow by way of example and shown in accompanying drawing a diagrammatic axial cross-section of a form of execution of my invention.

Inside the tube l forming the-mixer casing, a Y stream .3 moves in the direction of the arrow 2, this stream being for instance a stream of dry pulverized concrete urged forwards by compressed air. This stream passes first through the center of an annular container 4 which is fed with liquid, say water, through a duct 5. A series of apertures 5 in the bottom of the cong tainer facing the direction of flow lets the water escape.

' towards the central outlet Q. The central duct I is fed with water through a pipe 9 and is provided in its surface facing the direction of flow it with a series of holes H which lets the water escape.

There is thus provided an elongated mixer casing comprising a forwardly tapering chamber provided at an end with an axially located 20 outlet 8 and, in the rear of said chamber and coaxial therewith, a hollow extension provided at its end opposite the tapered chamber with an axially located opening 2 for admission into said'hollow extension of the stream of at least its one of the components of the mixture to be made within the mixer casing I.

It will be noted that the annular container d constitutes a supplying means opening within the casing extension substantially around the 3C! central opening thereof for discharging into said extension at least one .of the materials to be mixed, water in the present instance.

The working of the device is obvious: The

- stream 3 exerts a first sucking action on the aper- 38 tures B of the container 4 and a certain amount of water is thus admixed to this stream. As it passes over the central duct 1, the shape of which conforms with the theoretical path of the fluid threads, the stream exerts on the apertures i I 40 another sucking action and the water contained in this duct'is in its turn mixed with the stream. I consequently obtain through this double suction action and the special shape of the reservoirs used, an intimate mixture of the fluid in the con- 45 tainer 4 andJthe duct I with the stream 3. In the case of a stream of concrete, the concrete passes out of the end 8 of the tube I perfectly moist and ready for projection. The additional driving fluid such as compressed air, which car- 50 ries the cement or the like, into the device, is discharged automatically out of the mixture of '-'cement and water after said mixture has passed out of the outlet of the mixer and before it enters the receiver adapted to receive the mixture. 5c

area. afforded for the outlet or the stream being substantially equal to t 01 the admitting means, a pear-shaped container for the material arranged axially 01' said casing inside the casing with its point inifront of the rear end thereol. said container being provided with perforations at its front end and adapted to open the stream annularly as it enters the casing and to comstrain it to flow. along the foremost portion of the sidewalls of the casing and an annular container for the material, which annular container has its wall provided with a plurality of outlets affording communication between said annular container and the mixer casing located in a wall portion not bathed by the stream and so arranged that the material will flow from said annular container into the mixer casing in a direction substantially parallel to the axis of the casing.

2. A device for intimately mixing at least two materials in a state adapted for circulation within pipes, comprising an elongated mixer casing deilning an empty forwardly tapering, chamber pro-. vided at its forward end with an axially located outlet and an hollow extension in the rear of said chamber and coaxial therewith, said extension 5 being provided at its rear end with cover means and with an axially located inlet therein the crosssection of which is substantially equal to that of the outlet, said extension having further an'inner cross-section far greater than that ot'said inlet, 10 channel means provided within said extension around the inlet and adapted to be supplied with at least one of the materials to be mixed, said channel means directed to let said material. escape substantially towards the tapering chamber, l5

means located within said extension and adapted to open a stream of material entering the casing through said inlet-and to direct the opened part thereof towardsthe tapering chamber by acting only inwardly on the stream and leaving the 20 stra n outer surface free from any constraint within said extension, whilst the empty tapering chamber guides the opened stream by acting only on its outer surface, and channels providedin the front or said means and adapted to be supplied :5 I

with at least one of the materials to be mixed and directed to let said material escape forwardly.

JEAN ANTOINE MARCEL TELIE'I

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