US1675199A - Pump - Google Patents

Description

w. T. SMITH June 26, 1928.

PUMP

Filed April 2, 1927 Patented June 26, 1938.

UNITED STA PATENT oFFicE.

some,

A pncaneii filed April 2,

This invention relates to pumps, more particularly to pump inil'ie'llers or runners used in connection more particularly with hydraulic dredging operations.

Heretoforc it has been quite usual to pump up the Water and solid matter into the bins of seu going barges or dredges and allow the solid matter to settle out. This proced uie iiiy'olves considerable delay in settling out process. The broad object of this invention is to proVide a pump having such construction that in the pumping operation the liquid will befmostly separated from the solid matter, the liquid being discharged from one outlet and the solid orsemi-solid matter being discharged through another outlet and thence into a suitable bin or storage section. V 7

Further objects are to provide a novel runner or impeller for drawing in the mate'- r'ial to be actedvupon, separating it, and forcing it out in its separated state; to provide a cheap readily renewable screen element; to provide simple means on the runnerrmconfining the screen radially and causing it to turn with and, as part of, the runner or impeller; to provide a runner or inipeller .oomprisi'ng impeller blades and a circuniferentially arranged straining means disposed at an interval from the path of travel of the radially outer ends of said blades to consti'tut-e an inner annular chain her, in combination with a casing in which said runner is mounted, said casing having a discharge outlet communicating with said inner chamber and having" its inner p'eripheral face arranged at an interval from said straining means to provide an outer annular chamber between said inner face and said straining element, said outer chain} her being adapted to receive liquid forced through said straining element and said casing being formed with a separate dis-'1 charge outlet communicating with said outer chamber, Wlie'reby' the materials in said annular chambers will be discharged through separate outlets in their separated state; to provide a runner comprising blades, 21 straining eleli'nent and means for confining said straining element radially so as to hold it to form and c'ause' it to rotatejas a part of said runner, in combination ivith a casing in which said runnerarranged, said casiiig having a removable partnorinally preventingiinial movement of said strainer element While permitting easy access there'- 192'7'. Serial 1%.. 130,553.

to and removal thereof in anaxiai direction;

to provide a construction of runner blades curvilinear in shape With their 'conveX faces nted in the direction of rotation to foite the materials outward radially and create a strong: pressure to force the mater'ials, as separated, under pressure out of their separate outlets Without other means ofpropulsion; to provide readily rem'ov able and renewable liner element provided with a relatively fixed spade element projec'tii g, as assembled, into the inner annular chaniber', preferably the upper: portion thereof, and registering with the discharge thereof to aid in discharging the material therefrom and to act as ascrape'r in keeping the strainer element unobstructed or clean; and to otherivise improve and simplifyth'e construction and operation, all of which ob ject's, "among others, are accomplished by the construction, combination and arrange ment of parts, all as hereinafter set forth and described. I p

In the accompanying drawings in which onlygseyeral of the possible embodiments of my invention are shown and described for the purpose of illustrating my invention and a the practice thereof as by law required, but with no intention of being limited thereto,

it being recognized by me that it is capable of embodiment in a number of other forms:

Fig. 1 represents a sectional view of a de-' v'ice e bouyng my invention taken on line 1'1 of Fig. 2; I, l I

I Fig. 2 represents a sectionalyiew thereof taken at right angles to'Fig. l;' on line 22 of said said figure;

Fig. 3 represents a fragmentary sectional View of a modified strainer construction having two nesting cylinders With an intervening layer of gu'nny sacking or other suitable straining material and l i'gf'iire 4 representsa detail fragmentary View on line of Fig. 2, looking in the direction of the anew, omitting, however, all parts ei'cept the liner 2 and the spade shown integral therewith,

Referring'now in detail to the drawin s,

the casing comprises an annularineinberA, side plates and'B secured to the n'ieiiiber by" of in any Qtliefusual Side platefB is centrally b'o ed and provided with a bushing E ehieh ieives eering r packed, by the usualglafidnut G. I The side plate B is provided was a central in'lejt' H.

and with a discharge port 1 inoltli peeps eral member A is provided with a liquid discharge port D, and base I. The runner or impeller shaft 5 extends through the central bore of plate B and has its inner end 6 reduced and preferably externally screw threaded to receive the preferably internally screw threaded hub 7 of the runner comprising preferably, an imperforate disk 8 having the preferably equi-distantly spaced strainer holdingfingers 11 extending from its edge axially toward the intake side of the casing, and curvilinearly disposed vanes 9 having their convex faces presented in the direction of rotation indicated by the arrow, Fig. 2, said vanes preferablyhaving end faces 10 arcuate in shape struck on the circle described by said ends, and said vanes extending equally to a point radially at a distance from the strainer to leave an annular space between the strainer 12 and the path of travel of the ends 10 of said vanes 9 which, however, turn together with said strainer 12, practically as a single part.

The runner assemblage as arranged in the casing is spaced from the plate B by removable liner 4: and from the plate B by removable liner 2 and the strainer 12 is disposed at an interval from the inner face of the element A, said interval being substan tially the same as the interval between the ends 10 of the runner vanes 9 and the strainer 12, thus in effect constituting an inner and an outer annular chamber concentrio with each other and with the axis of the runner or impeller, the outer chamber discharging its liquid contents through the discharge D and the inner chamber discharging through the opening 1.

The liner 2 is provided with a preferably integral projection or spade 3 having a curved and radially outwardly inclined inner face and is so formed and positioned as to register with one side of, and extend into, the opening 1 and as thus positioned and arranged itsinncr portion extends into the inner annular chamber between the strainer 12 and the runner vanes 9 for a distance nearly the actual width of said chamber and so as to be in, or almost in, contact by its radially outer face with said strainer 12 so as to intercept any solid or semi-solid.

material in said chamber as the same is carried around by said strainer 12 and to 10 and will be of a size tojust fit tightly between said equi-distantly spaced fingers 10, the fit being so tight as to prevent relascreen and creates a pressure that forces the 7 water in the outer chamberoutward through discharge D and also forces the solid and semi-solid matter outward through discharge 1, this latter operation being facilitated by the spade 3. r

The liners 4: and 2 may be held in place by screws 13 extending through their respective plates B and B as illustrated in Figure l, or by any usual and suitable means now commonly employed forthat, or similar purposes.

The discharge 1 communicating with the inner chamber may be, and preferably will be, defined by a removable liner or wear bushing 14, held in place in any suitable manner, as by screws 15, and the intake opening H may similarly be, and preferably will be, defined by a removable liner or wear bushing or lip 16, which extends slightly beyond the inner face of the liner 2 and which may be similarly held in place by similar screws 15.

The supply and discharge pipes not shown may be connected with their inlet and discharge ports in any suitable manner.

While it is preferred that the runner should have an imperforate part such as disc 8, this is not essential, but it is important that some means, rotating with the vanes 9, be provided for maintaining the strainer 12 in proper position with relation to the ends of said vanes 9 and the member A so as to provide the inner annular chamber for the solid or semi-solid matter and the concentric outer annular chamber for the liquids, substantially as above described.

In the modified form in Figure 3 the construction and operation are in all respects the same as in the preferred form above described, except that instead of the strainer 12 a composite screen comprising an annular outer perforated band 12 and a similar band 12 nesting in-said outer band 12 and an intervening layer of gunny sacking or other suitable material 12, is substituted for the strainer 12, the perforations in bands 12 and 1.2 being considerably larger, or several times larger, than the perforations in the strainer 12.

In both forms illustrated the runner will preferably have a'disc 8 on its intake end, said disc 8 being, of course, formed with a central intake opening concentric with the intake opening in the end plate B and of such size as to receive, and be centered by the inner end of the intake lining or removin saidcasing, andi'neans for: rotating'said impeller, said impeller comprising impeller vanes, and anannular strainer element immovable with relation to said blades and spaced between the radially outer ends thereof and the opposed face ofsaid casing, whereby two concentric annular chambers are provided, the inner chamber discharging through one ofsaid discharge ports and'the outer chamber discharging" through theotherof said discharge ports,

2. A: pump casing having an intake port and two independent discharge ports, in combination-with a rotary impeller arranged in said casing, and means for rotating saidimpeller, said impeller comprising impeller vanes, and an annular strainer element immovable with relation to said blades and arranged substantially equi-distantly, in a radial direction, between the radially outer ends thereof and the opposed face of said casing, whereby two concentric annular chambers are provided, the inner chamber discharging through one of said discharge ports and the outer chamber discharging through the other of said discharge ports.

3. A pump casing having an intake port and two independent discharge ports, in combination with a rotary impeller arranged in said casing, and means for rotating said impeller, said impeller comprising impeller vanes, fingers carried by said'impeller and extending at points about the axis thereof axially toward the intake side of said casing, and an annular strainer element fitting between said fingers and held substantially immovable with relation to said blades and as thus mounted being arranged between the radially outer ends thereof and the opposed face of said casing, whereby two concentric annular chambers are provided, the inner chamber discharging through one of said discharge ports and the outer chamber discharging through the other of said discharge ports.

at. A pump casing having an intake port and two independent discharge ports, in combination with a rotary impeller arranged in said casing, and means for rotating said impeller, said impeller comprising curvilinearly disposed impeller vanes, having their convex faces presented in the direction of rotation of said impeller, and an annular strainer element immovable with relation to said blades and spaced between the radially: outer ends" thereof and the opposed face of saidlcasing, whereby two concentric annular chambers are provided the inner chamber discharging through one of said dIS QhtIIgG ports and the other chamber discharging,

through the other of said, discharge ports.

5, A pump casing having an intake port and two independent discharge orts, in combination with a rotary impeller arrangedin saidcasing, and meansfor rotat ing, said impeller, said impeller comprising curvilinearly disposed impeller vanes having their convex faces presented in, the direction of rotation of said impeller, and an annular strainer element immovable with relation to said: blades and arlangedsubstan-v tiall-,- e ui distantl 1 in a radial direction .a

between the radially outer ends thereof and the opposed face of said casing, whereby two concentric annular chambers are provided,

theinner chamber discharging through one of said discharge ports and the, outer-chem} ber discharging throngl'i the other )of' said discharge ports. 7'

6. A pump casing: hav ng an intake port and two independent discharge ports, con'ib nationwith a rotary impeller arranged.

in said-casing, and means for rotating said impeller, said impeller comprising impeller vanes, an annular strainer element immovable with relation to said blades and spaced bet-ween the radially outer ends thereof and the opposed face of said casing, whereby two concentric annular chambers are provided, the inner chamber discharging through one of said discharge ports and the outer chamber discharging through the other of said discharge ports, and a spade element held immovable with relation to said casing, and

registering with one of said discharge ports and extending axially into said inner annu: lar chamber in proximity to said strainer element to scrape the more solid matter therefrom and to direct the solid and semisolid matter in.said inner chamber outward through its co-operating discharge port. I

7. A pump casing having an intake port, a radially outer discharge port and a radially inner discharge port in combination with a rotary impeller arranged in said casing, and means for rotating said impeller, said impeller comprising impeller vanes, an annular strainer element immovable with rela tion to said blades and spaced between the radially outer ends thereof and the opposed face of said casing, whereby two concentric annular chambers are provided, the inner chamber discharging solid and semi-solid material through the radially inner discharge port and the outer chamber discharging fluids through the radially outer discharge port, a normally fixed removable liner plate, and a spade carried by said liner plate, immovable with relation thereto ion registering with said radially inner discharge port and extending in an axial directioninto said inner annular chamber in close proximity to the radially inner face of said strainer element. I

8. A rotary pump impeller comprising vanes, a portion turning with said vanes, immovable with relation thereto and extending to at least a plurality of diametrically opposite points radially beyond the radially outer ends of said vanes, parts extending from said diametrically opposite points,and an endless band perforated sheet metal strainer held by said parts so as'to extend concentrically about the axis of said impeller and so as to turn with said vanes.

9. A rotary pump impeller comprising vanes, a disc turning with said vanes and extending radially beyond the radially outer ends of said vanes, fingers extending at equidistant points about the edge of said disc in an axial direction toward said vanes,'and an endless band perforated sheet metal strainer applied in an axial direction between said fingers and of such diameter as to be held tightly thereby to turn therewith.

10. A rotary pump impeller comprising vanes, a portion turning with said vanes, immovable with relation thereto and extending to at least a plurality of diametrically 11. A removable liner plate for a pump casing, said plate being formed with a lateral discharge opening, and a spade element immovable with relation to said plate projecting laterall therefrom away from, and registering wit 1, said discharge opening.

12. A removable liner plate for a pump casing, said-plate being formed with a lateral discharge opening and an integral spade element immovable with relation to said plate projecting laterally therefrom away from, and registering with,'said discharge opening.

13. A removableliner plate for a pump casing, said plate being formed with an integral spade element adapted, in the arranged relation of said liner plate, to project into the interior of said casing.

In testimony whereof, I have signed my name to this specification at New Orleans,

Louisiana, this 22 day of March, 1927.

' WALTER T. SMITH.

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