US1231506A

US1231506A - Valve mechanism for pumps.

Info

Publication number: US1231506A
Authority: US
Inventors: John Dick; Thomas H Rutter; Charles E Lewis
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-12-02
Filing date: 1916-12-02
Publication date: 1917-06-26
Anticipated expiration: 1934-06-26

Description

J. DICK, T. H. BUTTE-R & C. E. LEWiS.

VALVE MECHANISM FOR PUMPS.

APPLICATION FILED DEC.2,1916- Patented J 11116 26, 191K m mw 7 m- 8 Z 3 3 6 Z 2 5 v 21527 5 44 3 2 3 may 7 WITNESSES JOHN DICK, OF EAST PITTSBURGH,

THOMAS H. BUTTER, 0F HOMESTEAD, AND CHARLES E. LEWIS, OF SVJISSVALE, PENNSYLVANIA.

vanvn MECHANISM son PUMPS.

memos.

To all whom it may concern:

H. BUTTER, and CHARLES E. Lew s, citizens of the United States, and residents, respectively of East Pittsburgh, Homestead, and

Swissvale, all in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Valve Mechanisms for Pumps, of which the following is a specification.

Our invention relates to the construction of-va-lve mechanisms for pumps, is adapted for use on both the suction and discharge sides of the pumps-and although not limited to such apparatus,- isprimarily intended for use with high pressure pumps employed in pumping water and other fluids at high or more than average pressures.

l 'Heretofore, so far as we are aware, it has been the practice to inclose the valve mechanism of such pumps within the valve cas-' ing so that the operation of the valves is not visible when the pump is in use, and it is necessary to stop the operation of the pump and uncover the valve mechanism in order to ad ust the valve mechanism, as be comes necessary from time to time in the operation of such pumps and to determine whether or not the valve and its seat are in working order and the valve is closing tightly on its seat.

One object of our invention is to provide a valve mechanism for pumps having novel means for controlling the opening and. closing movements of the 'alves, and for adjusting the valve mechanism in positioning and regulating the extent of lifting movement of the valve.

Another object of the invention is to provide a "alve mechanism having improved means whereby theextent of lifting movement of the valve is made visible andpadjustment of the valve and valve operating mechanism is made possible without interruption of-the operation of the pump.

A further objectof this invention is to provide a valve mechanism for pumps having novel means whereby the extent of lift- I movement of the valve is lessened or inf ing movement of the valve in opening is varied without change in the force oppos ing the lifting movement of the valve, and I whereby the force opposing the lifting Specification of Letters Patent.

by bolts 7 and nuts 8. The casing 2 Patented June 2%, 1911 it,

Application filed December 2, 1916. Serial No. 134,710.

, creased at will without variation in the e1;- Be it known that we, JoHN DIeK,TnoMAs tent of lifting movement.

A further object of the invention is to provide a valve mechanism for pumps havmg mproved means whereby the friction between the sliding parts of the valve mechanism is reduced and. leakage at the joints between relatively moving parts of the apparatus is avoided and overcome.

Still further objects of our invention consist in the provision of the novel construe tions, combinations, and arrangements of parts shown in the drawing, to be described in detail hereinafter, and to be particularly pointed out in the appended claims.

The drawing forming part of this specification is a sectional elevation showing a pump casing having a valve mechanism constructed and arranged and applied for use thereon in accordance with our invention, the construction shown being adapted for use-on either the inlet or suction siee,-or the outlet or discharge side of the pump.

In the accompanying drawing, the numeral 2 designates the body or casing of a pump valvechamber having openings 3 and a connected to one end and adjacent to the opposite end of a transverse opening 5 which forms the valve chamber. One end of the opening forming the chamber extends to the exterior of the casing and is closed by means of a removable flange or cap 6 which is detachably secured in place may be located on either the suction side or discharge-side of the pumpgso that the opening 3 will form either the valve chamber inlet to, or outlet from the valve chamber 5, depending upon the side of the pump on which the chamber 5 is positioned.

The chamber of,the casing 2, which is shown located on the suction or inlet side of the pump, is provided at one end with a removable annular seat 9, and positioned on the seat 9 is'a lifting valve 10 of the mushroom. type. The valve 10 has, on its lower face, a spider 11 which projects downwardly intothe opening in the annular seat and forms a guide to maintain the valve in axial alinement with its scat during the opening and closing movements of the valve. The valve 10 also has a beveled face 10 on itsiperipherv which engages with a si1niried in adjusting the seating position of the valve with respect to the casing. 2, as'becomes necessary when the seat 9 and valve 10, after extendeduse, are ground or faced.

The head of the cap screw 13 has a conical recess therein which is engaged by the conical end of the valve needle 14', this needle forming a neat sliding fit with and extending through the axial opening in the adjusting stem 15 to form means for connecting the valve 10 which is inclosed within the valve chamber 5,to the valve spring 16 on the exterior of the valve chamber. A counterbore 17 in the lower end of the stem 15 provides clearance for the head of the cap screw 13, to enable the valve stem 12 to engage with the end of the adjusting stem 15. I

The flange or cap 6 has an annular projection 18 on one face, which projects into the valve chamber 5, and the opposite face of this flange has a counter-bored axial open ing 19 therein, the counterbore 20 of this axial opening being provided with internal screw threads and forming a stuiiing box for the adjusting stem 15 which extends through the axial opening 19 and counterbore 20.

The stutling box formed by the counterbore 20 is provided with a removable seat 21 and with a packing nut or gland 22,

which is polygonal in transverse section at its upper end for the attachment of a wrench. The gland 22 is screwed into the stufiing box and engages with the annular ring 23 to compress the packing in forming a tight joint around the adjusting stem 15. The gland 22 also has an internally threaded recess 24 in one end, the threads of which engage with the screw threads 25 the stem 15.

on the adjusting stem 15 to hold this stem in ad usted position on the flange 6. A am nut 26 on the stem 15, winch engages with the end of the gland 22, locks this stem in adjusted position. v

The outer end of the adjusting stem 15 also is screw threaded and has a shoulder 2'2 thereon against which the internally threaded end of the hollow spring post 28 is jammed in' fastening the post on the adjusting screw, the shoulder 27 being made polygonal in transverse section to afford means for applying a wrench in adjusting The spring post 28 has a set screw 2) in its opposite end for securing the valve spring 16, which is located within the hollow post, in place, and for adjusting the compression on the spring. The jam nut 30, by engagement with the end of the post 28, locks the set screw 29 in adjusted position.

The openings 31 in the side wall of the the packing in the stutling box and form a tight joint around the lengthwise movable needle. The needle 14 is made small in diameter so as to lessen the friction between it and the-packing in the stutfing box 32, and as the major portion of the length of the needle forms a neat .sliding fit within the openings in the gland 33 and adjusting stem 15, the needle cannot bend and'bind when transmitting power or force from the spring 16 to the valve 10, or vice versa.

A spring centering cap or follower 35 is positioned between the outer end of the needle 14 and one end of the spring 16, and a similar follower 36 connects the other end of the spring with the conical end of the set screw 29 in the outer end of the spring post 28, the valve spring 16 being held in position within the hollow spring post 28 by engagement with the

projections

37 and 38 on the faces of the

followers

35 and 36.

By reference to the drawing it will be readily seen that the operation of the valve 10 within the valve chamber 5 is indicated or made visible by the movement of the outer end of the needle lei, and the spring 16, which are on the exterior of the valve chamber 5.

It will also be seen thgt the valve 10 may be positioned within the valve chamber 5 invarious locations to suit the seat when the valve and seat are re-ground or re-faced, without changing the amount of compression on the valve spring 16, by suitably adjusting the cap screw 13 in the end of the stem 12 of the valve. The extent of lifting movement of the valve 10 is regulated by means of the adjusting stem 15, as the end of the valve stem 12 engages with the ad jacent end of the adjusting stem 15 so that by: varying the position of the adjusting stem 15 in the casing 2 relative to the valve 10 the lifting movement of the valve may be changed. hen the lifting movement of the valve 10 is changed the compression of the spring 16 will be regulated by means of the set screw 29 in the upper endof the opening therein, an adjusting stem mounted in theaxial opening and having an axial opening therein, a hollow spring post on the outer end of said stem, a coil spring within the hollow post, and a sliding needle extending through the axial opening in said stem and operatively connecting said spring and lifting valve.

2. A valve mechanism comprising a valve casing -having a valve chamber, a lifting valve in the chamber, said chamber having .inlet and outlet openings extending thereinto, said openings being on opposite sides of said valve, a cap closing one end of the valve chamber and having an axial opening. therein, an adjusting stem mounted in the axial opening and having an'axial opening therein, means for adjusting the stem on said cap, a hollow spring post on the outer end of said stem, a coil spring within the post, and a slidingjneedle extending through the axial opening in said stem and operatively connecting said spring and lifting valve.

3.. A valve mechanism comprising a valve casing having a valve chamber, a lifting valve in said chamber, an adjusting screw on said valve to regulate the lifting movement of the valve relative to the adjusting stem, said chamber having inlet and outlet openings extending thereinto, said openings be ing on opposite sides of said valve, a removable cap closing one end of the valve chamber and having an axial opening therein, an adjusting stem mounted in the axial opening and having an axial opening therein, a hollow spring post on the outer end of said stem, a coil spring within the hollow post, and a sliding needle extending through the axial opening in said stem and operatively' connecting said spring and lifting valve.

4. A valve mechanism comprising a valve casing having a valve chamber, a lifting valve in said chamber, said chamber having inlet and outlet openings extendingthereinto, said openings being on opposite sides of said valve, a removable cap closing one end of the valve chamber and having an axialopening therein, an adjusting stem mounted in the axial openingand having an axial opening therein, means for adjusting the stem on said cap, means for locking the stem in adjusted position, a hol low spring post on the outer end of said stem, a spring within the hollow post,'and a sliding needle extending through the axial opening in said stem and operatively connectmg said spring and lifting valve.

, 5. A valve mechanism comprising a valve casing havmg a valve chamber, a lifting valve in the chamber, said chamber hav-- ing inlet and outlet openings extending thereinto, said openings being on opposite sides of said valve, a cap closing one end of the valve chamber and having an axial opening therein, an adjusting stem mounted in the axial opening and having an axial opening therein, a hollow spring post on the outer end-of said stem, a coil spring within the hollow post, a sliding needle extending through the axial opening in said stem to connect the spring and valve, and adjusting means on the spring post to engage the spring in regulating the compression on said spring.

' 6. A valve mechanism comprising a valve casing having a valve chamber, a lifting valve in said chamber, said chamber having inlet and outlet openings extending thereinto, said openings being. on opposite sides of, the valve, a cap closing one end of the valve chamber and having an axial open ing therein, an adjusting stem mounted in the axial opening and having an axial opening therein, means;- for packing the joint between said cap and adjusting stem,

a spring post on the outer end of said stem,

.a spring on the post, a sliding needle'extending through the axial opening in said stem and connecting said valve with the spring, and means for packing the joint between said stem and needle.

7. A valve mechanism comprising a valve casing having a valve chamber, a lifting valve in the chamber, said chamber having inlet and outlet openings extending there into, said openings being on opposite sides of said valve, a cap closing one end of the valve chamber, an adjusting stem adjustably mounted on the cap, said stem having an axial opening therein, a spring post on the outer end of said stem, :1 spring on the post, and a slidable needle extending through the opening in said stem to connect said liftingvalve with said spring.

In testimony whereof we have hereunto set our hands.

JOHN DICK. THOMAS H. BUTTER. CHARLES E. LEWVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latenta Washington, D. 0.