US1867876A - Eductor - Google Patents

Description

y 19, 1932- a w. T. CLARK 1,867;876

\ EDUCTOR Filed Nov. 22. 1929 Patented July 19, 1932 UNITED STATES PATENT OFFICE WILLIAM CLARK, OF CHICAGO, ILLINOIS, ASSIGNOR T0 WHITING' CORPORATION, OF- HARVEY, ILLINOIS, A. CORPORATION OF ILLINOIS EDUCTOB Application med November 22, 1929. serial No. 409,105.

The present invention'relates generally to eductors of the type in which an operating medium of liquid under pressure flows velocity jet which is used to entrain granular material, such as sand, and to project the same into a body consisting of-a mouth, a tapered discharge nozzle orthroat-piece and an outlet chamber. More, particularly the invention relates to those eductors which are designed to be submerged in the granular material and in which the casing that forms the inlet conduit for the liquid under pressure is associated with and connected directly to the body which receives the liquid mixture that is caused to be created by. the pressure nozzle. v

.One object of the invention is to provide an eductor of the aforementioned type in which the tapered throat-piece that is disposed between the mouth and the outlet chamber of the body is formed as a separate part and is laterally removable so that it may be readily replaced in the event that it becomes in ured or worn.

Another object of the invention is to provide an eductor of the character under consideration embodying means of an improved character for securing the throat-piece in its operative position between the mouth an outlet chamber. 4 A further object of the invention is the provision of an eductor throat-piece which is in the form of a tubular insert and comprises a cylindrically shaped shell and a sectional liner of hard wear-resisting metal. A still further object of the invention is to provide an eductor which is generally of new and improved construction, consists of a comparatively small number of parts, and may be manufactured at a low and reasonable cost.

Other objects of the invention and the various advantages and characteristics of the present construction will be apparent fromfeatures hereinafter set forth and more par-.

clusion hereof.

. In the drawing which accompanies and through a pressure nozzle to produce a hlgh .forms a part of this specification or disclosure Figu-re 1 is a vertical sectional diew of an eductor embodying the invention F igure 2 1s a transverse section taken on the line 22 of Figure 1 and disclosing in detail the construction of the throat-piece and the manner in which the latter is removablyheld in its operative position; and

Figure 3 is a perspective view of the afore said throat-piece. 4

The invention is exemplified in aneductor comprising an elongated casing 5 which is adapted to be submerged in'thesand or other granular material that is to be handled, and is held in a vertical position, during operation thereof. The casing has formed therein a vertically extending liquid conduit 6 and is provided at its lower end with 'a laterally projecting extension 7. The latter is hollow and communicates directly with the lower end of the conduit 6. The upper end of the casing 5 is connected by a screw thread conduit 6 and into the extension 7. A pressure nozzle 9 for producing a high" velocity jet is associated with the extension 7 and is arranged so as to discharge upwardly the liquid that is delivered by the supply pipe 8 into the conduit 6. The nozzle 9 is connected to the top or upper part of the extension 7 by a screw thread connection 10 and is provided at its lower end with a shoulder 11. A washer or gasket 12 is interposed between the shoulder 11 and the upper part of the extension 7 to prevent leakage of liquid around the screw thread connection 10. The nozzle 9 is inserted into place through an opening" 13 in the bottom or lower part of the extension 7. This opening is normally closed by a plug 14.

The high velocity jet of liquid that emanates from and is formed by the nozzle 9 entrains the granular material that surrounds thecasing and projects the same into a body connected to the upper end of the member 17 by a screw thread connection and forms an' the granular material that is drawn into con tact with the high velocity jet of liquid. The member 17 is formed integrally with the casing 5 and is positioned with respect to the mouth 15 so that there is an intervening space in which the throat-piece 16 is disposed. Said member 17 is so constructed that the chamber which is formed therein and is designated by the numeral 18 communicates with the throat-piece 16 and is adapted to receive the liquid mixture therefrom. A pipe 19 is outlet for the chamber 18.

The throat-piece 16 extends between the mouth 15 and the chamber-forming member 17 and is adapted 'to receive the liquid mix ture that is caused to be created by the nozzle 9. It comprises a cylindrically shaped shell 21 and a liner 22. The latter preferably consists of two complementary sections, is formed of hard wear-resisting metal and is pressed into engagement with or otherwise rigidly secured to the inner periphery of the shell 21. A characteristic and an advantage of forming the liner in this manner is that the throat-piece may be manufactured at a low cost and effectively resists wear. The inner peripheral portion of the liner 22 is so shaped that it tends to change the velocity of the liquid mixture into pressure of suificient magnitude to cause the mixture to be discharged from the chamber 18 through the outlet pipe 19. The throat-piece- 16, when in its operative position, fits against a semi-cylindrical seat 23. This seat is formed integrally with the casing 5 and extends between the lower end of the member 17 and the upper end of the mouth 15. The throat-piece 16 is held in place against the seat 23 by a pair of plates 24. These plates are preferably welded to diametrically opposite parts of the shell 21 and are extended so as to lap the sides of the seat 23. Bolts 25 extend through transversely extending sockets 26 in the seat 23 and serve to clamp the plates 24 in place. By utilizing the plates 24 and the bolts 23, the throat-piece is removably held in its operative position and consequently may be readily withdrawn for repair or replacement pur- I poses.

eavers through the conduit 6 to the pressure nozzle 9. The latter, by virtue of its shape, operates to produce a high velocity jet which creates a partial vacuum within the mouth 15 and thereby entrains the surrounding granular material and causes a flow of the liquid mixture up into the throat-piece 16. As the high velocity jet leaves the pressure nozzle 9 the liquid comes in contact with the granular material which has been drawn up into the month by the partial vacuum hereinbefore mentioned and imparts to such material sutficient energy to carry it through the tapered peripheral portion of the throat and into the outlet chamber 18 from whence ii is discharged into the outlet pipe 20. In t e event that the liner 22 becomes worn as a result of the material impinging thereagainst, the throat-piece maybe withdrawn and a new one substituted therefor simply by releasing the bolts 25 and sliding the shell 21 together with the plates 24 laterally out of engagement with the seat 23.

The eductor herein. disclosed and described may be manufactured at a comparatively low cost in that it consists of but a small number of parts. It constitutesan improvement over eductors of like character in that provision is made for quickly and readily removing the throat-piece in the event of wear.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. Man eductor, the combination of an elongated easing shaped to form a conduit for liquid under pressure and provided at one end thereof with a nozzle for discharging the liquid in jet form, a body connected to the other end of the casing and having a suction mouth positioned to receive the jet of liquid and adapted to receive material to be conveyed by the jet, said body also having an outlet chamber for the material andthe liquid, and a tubular throat having a liner of wearmetal between the mouth andthe chamber,

said throat beingv removable from the body transversely of the axis of the mouth.

2. In an eductor, the. combination mf an elongated casing adapted to extend vertically and shaped to form a longitudinal conduit for liquid under pressure, an upwardly extending nozzle connected to'the lower end of the casing and operating to discharge the liquidupwardly and in jet form, a body connected to the upper end of'the casing and having a suction mouth positioned to receive the jet of liquid and adapted to receive material to be conveyed by the jet, said body also having an outlet chamber for the material and the liquid and being constructed so that there is an opening between the mouth and the chamber, and a tubular throat forming a continuation of the mouth and secured in said opening and between the mouth and the chamber, said throat being removable from the body transversely of the axis of the mouth.

3. In an eductor, the combination of an elongated cast metal casing adapted to extend vertically and shaped to form a conduit for liquid underpressure, an upwardly extending nozzle connected to the lower end of the casing and operating to discharge the liquid upwardly and in jet form, a body formed integrally with the upper end of the casing and embodying a suction mouth positioned to receive the jet of liquidand adapted to receive material to be conveyed by the jet, said body also embodyingan outlet chamber for the material and the liquid and being constructed so that there is an opening between the mouth and the chamber, and a throat comprising a tubular shell and a liner of wear-metal, secured in the opening and removable from said opening transversely of the axis of the mouth.

4. In an eductor, the combination of a nozzle for discharging a jet of liquid under pressure, a body having a suction mouth positioned to receive the jet of liquid and adapted to receive material to be conveyed by the jet, said body also having an outlet chamber for the material and the liquid and for securing the plates body.

and throat to the Signed at Chicago, Illinois, this 5th day of September, 1929.

WILLI being constructed so that there is an opening by the jet, said body also having an outlet chamber for the material and the liquid and being arranged so that there is an opening between the mouth and' the chamber, and a tubular throat in the opening, comprising a shell and a liner of wear-metal, means on the shell lapping the body, and means for removably securing the shell to the body.

6. In an eductor, the combination of a nozzle for discharging a jet of liquid under pressure, a body having a suction mouth positioned to receive the jet of liquid and adapted to receive material to be conveyed by the jet, said body also having an outlet chamber for the material and theliquid and being arranged so that there is an opening between the mouth and the chamber, a tubular throat in the opening comprising a shell and a liner of wear-metal, plates secured to the shell and adapted to lap the body, and bolts AM 'r. CLARK.

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