US3612732A

US3612732A - Catalyst pump

Info

Publication number: US3612732A
Application number: US37762A
Authority: US
Inventors: Larry C Stephans
Original assignee: Quaker Oats Co
Current assignee: Qo Chemicals Inc
Priority date: 1970-05-15
Filing date: 1970-05-15
Publication date: 1971-10-12
Anticipated expiration: 1988-10-12

Abstract

A pump for pumping catalyst and the like is disclosed. The pump has a variable stroke piston. Variation in the stroke of the piston is accomplished by incrementally adjusting the attachment of the piston rod at various locations substantially along the entire length of a pumping arm. the pump piston is hollow with an outlet at the uppermost portion thereof and with means for directing flow from the inlet to the outlet thereof.

Description

United States Patent Larry C. Stephans Crystal Lake, lll.

May 15, 1970 Oct. 12, 1971 The Quaker Oats Company Chicago, Ill.

lnventor Appl. No. Filed Patented Assignee CATALYST PUMP 1 Claim, 3 Drawing Figs.

U.S. Cl 417/554,

92/135, 417/426 Int. Cl F04b 13/00 Field of Search 417/426,

[56] References Cited UNITED STATES PATENTS 3,499,387 3/1970 Zippel 92/135 x 3,430,576 3/1969 Tyree, Jr. 417/554 x 2,925,780 2/1960 Tear 417/399 Primary Examiner-Carlton R. Croyle Assistant Examiner-Richard J. Sher Attorneys-Milton C. Hansen and Donnie Rudd ABSTRACT: A pump for pumping catalyst and the like is disclosed. The pump has a variable stroke piston. Variation in the stroke of the piston is accomplished by incrementally adjusting the attachment of the piston rod at various locations substantially along the entire length of a pumping arm. the pump piston is hollow with an outlet at the uppermost portion thereof and with means for directing flow from the inlet to the outlet thereof.

PATENTEDHBI 12 I97! 3.612.732

INVENTOR. LARRY C. STEPHA/VS Afforney CATALYST PUMP BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a variable stroke catalyst pump having a hollow piston as the pumping mechanism.

2. Description of the Prior Art Many attempts have been made to provide a pump for use with the catalysts which will supply catalyst outputs in a wide range of pumping rates. Generally, this has been accomplished by either changing the diameter of the piston or else altering the stroke frequency. This invention may utilize a change in stroke frequency but changes pumping rate primarily by altering the piston stroke.

- SUMMARY OF THE INVENTION It is an object of this invention to provide a catalyst pump which can easily be adjusted to give a wide range of pumping outputs.

The objects of this invention are accomplished by a pump for pumping catalyst and the like, said pump comprising: a horizontal baseplate having a hinge end, a middle portion and a reciprocating end, said middle portion of said base plate having means for attaching a pump housing at various locations thereon; a horizontal pumping arm having a hinge end, a middle portion and a reciprocating end, said middle portion of said pumping arm having means for incrementally moving substantially the entire length thereon and attaching thereto a piston rod; a vertical connecting plate having an upper end and a lower end; said lower end being movably connected to said hinge end of said horizontal baseplate and said upper end being movably connected to said hinge end of said horizontal pumping arm; means for moving the reciprocating end of the pumping arm and the reciprocating end of the baseplate alternately toward and away from each other; a pump housing having an inner portion and an outer portion, said pump housing being movably attached to said means for attaching a pump housing to various locations on said baseplate, said pump housing having an inner cylindrical cavity extending from the inner portion of the pump housing to the outer upper portion thereof; an intake passage extending from the outer portion of the pump housing to the bottom of the inner cylindrical cavity; a discharge passage extending from the outer portion of the pump housing to the upper portion of the inner cylindrical cavity; a hollow piston having a cavity extending from its lower outer side substantially into upper portion of the piston, said piston having substantially the same cross-sectional shape as the cross-sectional shape of the inner cylindrical cavity of the housing, said piston having a piston rod extending therefrom and said piston being movably located in said cylindrical cavity, and said piston rod being movably attached to said means for incrementally moving thereon and attaching thereto a piston rod; a piston discharge port extending from the upper portion of the piston cavity to the outside of the piston at a point adjacent to the discharge passage of the pump housing; means for permitting fluid flow only into said intake passage; means for permitting fluid flow in said hollow piston only in a direction from the intake passage to the discharge passage; means for permitting fluid flow only out of said discharge passage; and a surge tank, said surge tank being hydraulically connected to the discharge passage of the pump housing.

The objects of this invention are further accomplished by a design such is shown in the accompanying drawings and made reference to herein.

BRIEF DESCRIPTION OF THE DRAWINGS This invention may be more fully described but is not limited by the attached drawings wherein:

FIG. 1 is a perspective view of the pump of this invention.

FIG. 2 is a view along the line 2--2 of FIG. 1.

FIG. 3 is a cross-sectional view taken along the line 3-3 of FIG. 1 illustrating the details of the pump mechanism.

In the drawings l have found the numeral 10 to refer to the baseplate. The middle portion of the baseplate 10 has means for attaching a pump housing at various locations therein illustrated by the groove 11 and the plurality of holes 12. A vertical connecting plate 13 is shown being movably attached by a pin 14 to the baseplate. The upper portion of the vertical connecting plate is movably attached by a pin 15 to a pumping arm 16. The pumping arm has means for incrementally moving substantially the entire length thereon and attaching thereto a piston rod illustrated by grooves 17 and 18 in which a locking plate 19 slides. The locking plate 19 passes through both grooves and is threaded in the form of a'bolt 20 on the side opposite the adjustment side. A wingnut 21 is used to tighten and secure the adjustment when the proper pumping rate is achieved. The grooves 17 and 18 are substantially the entire length of the-pumping arm 16. The locking plate 19 is adjusted in the grooves by loosening the wingnut and turning knob 22 which turns screw 23. As the screw 23 turns in the threaded pumping arm extension 24, it forces the locking plate 19 along the grooves. The locking plate is movably attached to screw 23 at the point 25 by having the rod pass through a larger diameter hole and not by having the

locknuts

26 and 27 completely tightened on the locking plate. The piston rod 28 is movably connected to the locking plate by a connection piece 29 which has a hole therein and fits around the cylindrical portion of the connecting plate.

Any conventional method may be used for moving the pumping arm toward and away from the baseplate thereby moving the piston up and down in the piston cylinder cavity. For purposes of illustration, I have shown this mechanism to be a cam 31 which rotates about cam shaft 32 by pushing the rod 33 down. The rod is then forced upward by the spring 34. The rod is in turn connected to the pumping ann pin 35.

The pump is best illustrated by its cross-sectional view in FIG. 3. The pump has a pump housing 36 which is attached by pin 37 in holes 12. The pump housing has an intake fitting 3,8 which is hydraulically connected to the intake passage 39. The intake passage 39 is hydraulically connected to the bottom inner cylinder cavity 40. The hollow piston 41 moves in the inner cylinder cavity and is provided with seals in the fonn of O-

rings

42 and 43. A discharge passage 44 is connected to the upper part of the inner cylindrical cavity and has a fitting 45 attached thereto. This fitting is in turn connected to a surge tank 46. The piston has a hollow portion 47 which extends from the bottom thereof substantially upward into the upper portion of the piston. The upper portion of the piston has discharge port 48 which is merely an opening in the piston wall. This discharge port 48 corresponds to the discharge passage 44 in the pump housing. Flow is directed through the pump in one direction by check valves illustrated here by

springs

49, 50, and 51 and

balls

52, 53, and 54.

In operation, the pump housing is adjusted to the desired holes 12. The wingnut 21 is then loosened and knob 22 is turned to move the piston rod to adjust to the proper stroke and thereby effect the proper pumping rate. The wingnut 21 is then tightened to insure that the rate remains steady. As cam 31 turns, it forces the pumping arm 16 up and down with relation to the stationary base plate 10. This movement causes the piston rod 28 to move up and down and consequently the piston 41 to move up and down in the cylinder cavity. When the cylinder is down, all of the check valves are closed. As the piston moves up, the ball 52 opens allowing the cylinder cavity to fill with catalyst. As the piston moves down, ball 52 closesthe cylinder cavity and ball 53 opens filling the piston with catalyst. After repeated strokes downward movement of the piston forces catalyst out of the discharge port 48 and into the discharge passage 44. Ball valve 54 then opens allowing catalyst to move into the surge tank. As the catalyst fills the surge tank, it exits in a substantially uniform constant rate of flow.

This pump provides a new method for providing a wide range of pumping rates by simple adjustment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The accompanying drawings along with the description thereof may be taken to be a preferred embodiment of this invention.

Having fully described this new and unique invention, claim:

1. A pump for pumping catalyst and the like, said pump comprising: a horizontal baseplate having a hinge end, a middle portion and a reciprocating end, said middle portion of said baseplate having means for attaching a pump housing at various locations thereon; a horizontal pumping arm having a hinge end, a middle portion and a reciprocating end, said middle portion of said pumping arm having means for incrementally moving substantially the entire length thereon and attaching thereto a piston rod; a vertical connecting plate having an upper end and a lower end; said lower end being movably connected to said hinge end of said horizontal baseplate and said upper end being movably connected to said hinge end of said horizontal pumping arm; means for moving the reciprocating end of the pumping arm and the reciprocating end of the baseplate alternately toward and away from each other; a pump housing having an inner portion and an outer portion, said pump housing being movably attached to said means for attaching a pump housing to various locations on the baseplate, said pump housing having an inner cylindrical cavity extending from the inner portion of the pump housing to the outer upper portion thereof; an intake passage extending from the outer portion of the pump housing to the bottom of the inner cylindrical cavity; a discharge passage extending from the outer portion of the pump housing to the upper portion of the inner cylindrical cavity; a hollow piston having a cavity extending from its lower outer side substantially into the upper portion of the piston, said piston having substantially the same cross-sectional shape as the cross-sectional shape of the inner cylindrical cavity of the housing, said piston having a piston rod extending therefrom and said piston being movably located in said cylindrical cavity, and said piston rod being movably attached to said means for incrementally moving thereon and attaching thereto a piston rod; a piston discharge port extending from the upper portion of the piston cavity to the outside of the piston at a point adjacent to the discharge passage of the pump housing; means for permitting fluid flow only into said intake passage; mans for permitting fluid flow in said hollow piston only in a direction from the intake passage to the discharge passage; means for permitting fluid flow only out of said discharge passage; and a surge tank, said surge tank being hydraulically connected to the discharge passage of the pump housing.

Claims

1. A pump for pumping catalyst and the like, said pump comprising: a horizontal baseplate having a hinge end, a middle portion and a reciprocating end, said middle portion of said baseplate having means for attaching a pump housing at various locations thereon; a horizontal pumping arm having a hinge end, a middle portion and a reciprocating end, said middle portion of said pumping arm having means for incrementally moving substantially the entire length thereon and attaching thereto a piston rod; a vertical connecting plate having an upper end and a lower end; said lower end being movably connected to said hinge end of said horizontal baseplate and said upper end being movably connected to said hinge end of said horizontal pumping arm; means for moving the reciprocating end of the pumping arm and the reciprocating end of the baseplate alternately toward and away from each other; a pump housing having an inner portion and an outer portion, said pump housing being movably attached to said means for attaching a pump housing to various locations on the baseplate, said pump housing having an inner cylindrical cavity extending from the inner portion of the pump housing to the outer upper portion thereof; an intake passage extending from the outer portion of the pump housing to the bottom of the inner cylindrical cavity; a discharge passage extending from the outer portion of the pump housing to the upper portion of the inner cylindrical cavity; a hollow piston having a cavity extending from its lower outer side substantially into the upper portion of the piston, said piston having substantially the same crosssectional shape as the cross-sectional shape of the inner cylindrical cavity of the housing, said piston having a piston rod extending therefrom and said piston being movably located in said cylindrical cavity, and said piston rod being movably attached to said means for incrementally moving thereon and attaching thereto a piston rod; a piston discharge port extending from the upper portion of the piston cavity to the outside of the piston at a point adjacent to the discharge passage of the pump housing; means for permitting fluid flow only into said intake passage; mans for permitting fluid flow in said hollow piston only in a direction from the intake passage to the discharge passage; means for permitting fluid flow only out of said discharge passage; and a surge tank, said surge tank being hydraulically connected to the discharge passage of the pump housing.