US1331504A - Pump - Google Patents

Description

W. B. HEW-ITT.

' PUMP.

P i l I .l 1,331,504. A PLICATION FILED OCT 30 1915 Patented Feb. 24,

2 SHEETS-Snam 1.'

w. BpHEwlTT.

PUMP.

APPLICATION FILED OCT. 30, I9l5. 1,381,504. Patented Feb. 24,1920.

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MENTS, To woRTHINGroN PUMP AND MACHINERY CORPORATION, or NRW' YORK vice, because of UNITED STATES` PATENT OFFICE.

N'. Y., A` CORPORATION OF VIRGINIA.

PUMP.

To all whom z't may concern.' Y

Be it known that I, WILLIAM B. HEWITT, a citizen of the United States,'residing at Holyoke, county of Hampden, and State of Massachusetts, `have invented certain new and useful Improvements in Pumps, fully described and represented in the following specification and the accompanying drawings forming a part of the same. i

This yinvention relates tothat class of pumps used especially for the transportation of oil through pipe lines. 'In this servthe necessity for continuous operation, the penetrating nature of the material handled, and the factthat pumping plants arelocated in many cases at a great distance fromthe base of supply and repair, these pumps must be extremely rugged, simple in construction and with 'their parts readily accessible.

Thel especial object of this invention is I the production of a pump of this class which shall meet these requirements with approximately straight ,direct flow of the oil through the pump, small clearances and, large valve area, whereby higher plunger velocities 'may be obtained and tortuous passages and large Aclearance spaces be avoided. For use with a pump of this kind a special valve construction has been developed in which the valve parts are readily accessible and easily remfvable, and this forms in itself a specific feature of the invention.

In the accompanying drawings forming a part 0f this specification an oil line pump embodying all the features of the invention in their preferred form is shown,and this construction will now be described in detail and the features forming the invention then specifically pointed out in the claims.

In the drawings- Figure 1 is a side elevation, tion, to show the struction;

Fig. 2 is a plan view showingpa two pump construction. j I

Fig 3 is a section on the line 3-3 of Fig. 1, showing the' valve construction in detail;

Fig. 4 is asimilar view showing a modi fied valveQconstruction.

Referring tothe drawings, A is the pump head frame carrying crank-shaft B shown cylinder and valve con- Specication of Letters Patent. Application filed oeteber so, 1915.

with the suction and covers are partly in sec- 'of the bolt 3.

seat.

Patented Feb. 24, 1920. Serial No. 58,776.

rods 15. Suitable cradles 16 with cross-head guides are provided. The pump cylinder is made up onf two pump cylinder sections 18 having thelr force chambers 24'integral with the cylinders,the cylinders being bolted together at their force chamber ends, and provided` with flanges 19 for connection to the cradles 16, the usual outside packed plunger lglands 20`being shown. 18 with their individual valve chambers are cast integral and the cylinders are interchangeable. A common suction breeches 21 forms thersuction chamber for the inlets 22 of the two cylinder sections and connects pipe line 23. The suction valves 29 preferably open into the cylinder beyond vthe plunger stroke, thus reducing the clearance. The force chamber 24 has discharge ports 25 for the pump cylinders controlled by discharge valves 30, and discharge openings 26 connected by common discharge pipe '27 to the discharge pipe line 28. The discharge ports 25 are slightly larger than the suction ports 22 and are in alinement therewith. Suitable hand holes provided above the discharge valves to provide a ready access to the valves.

Fig. 3 shows a'valve construction well adapted for use in a pump of this kind, in which 22 and 25 are, respectively, the suction and discharge ports having valve seats l and 2 mounted therein. Through the valve seats passes a heavy rod or bolt 3 which also passes throu h the bottom of the Cylinder sections suction chamber 2l and 1s secured by cap nut 4. Below the valve seat 14 the bolt 3 carries collar 6. Suction valve 29 moves upon a hollow valve stem 7 provided with a head 8 screwthreaded on the threaded portion 5 A spring 9 between. the valve 8 presses the valve upon its The discharge valve construction is identical with that of the suction valve7 eX- cept that the valve stem for the discharge valve is provided with a loop 10 above the nut portion to enable the entire valve conand the head stru'ction to 'be withdrawn `from the pump of the valve cap 34 and passes cylinder upon the release of cap nut 4.

Fig. 4 shows a variation of the valve construction shown in Fig. 3, in which 1 and 2 are respectively the suction and discharge valve seats. Upon the valve seats 1 and 2 are seated, respectively, suction and dis-` charge valves formed of ball valves 31, 32, and caps 34, 35. A rod-or bolt 36 screw threaded on each end is screwed into the top through the valve seat 2 and cap 35, and is capped by a cap nut 37. Into the bottom of the valve cap 34 is screwed a rod or bolt 38 carrying a collar 6. A collar nut 39 passes through stuing boX 40 in the bottom of the suction chamber 21 and engages the screw threaded end of the bolt 38.

It will be seen that the valve mounting provides for the convenient removal of the discharge valve andits seat independently of thesuction valve and its seat, that both .the valves and their seats may be removed successively without removing the rod on which the partsarevlmounted, and that by removing the cap `nut`4 of Fig. 3 or unscrew ing the'nut 39 rom'rod 380iL Fig. 4, the entire valve and valve seat construction may be removed as a lunit with the rod. In the it will be seen that without removing they nut39 and its pack ing40, so that the suction 'chamber 21 is not opened by the removal ofthe rod. Ihe-entire valve and valve seat construction can thus be removed without draining the sucp v secured on the rod for holding-the rod in tion chamber. l Y

The pump construction is very simple manufacture, requires a minimum of care' in :foundry work, 'assuresa leak-proofl casting by the integral valve chambers and the cylinder sections are readily interchan eable. The distance from lthe floor to the un' erside of the discharge valve is minimized thereby materially reducing' the total suction `lift from that vused in the ordinary type of pot valve where the discharge valves are located, high above the oil cylinder. p The simplicity of the cylinderk section casting is increased by the separate valve seats, eliminating the likelihood of breakage and increasing the accessibility of `all 'the valve parts for removal. l v

What I claim is:

1. A double acting center discharge pump having a cylinder formed 4of two cylinder sectionsneach-cylinder section formedin a single casting with itsvalve chamber in line with the plunger and beyond the plunger movement, and suction and discharge ports in the valve chamber ends of the cylinder sections.

2. A 'double acting center discharge pump having a cylinder formed, of two cylinder sections, each cylinder section formed in abe withdrawn single casting with its valve chamber in line with the plunger and beyond the plunger movement and the sections being bolted t0- lgether at` their valve cham'ber ends, and a the discharge ports and beyond the plunger movement.

4. A pump having a cylinder formed or i two cylinder sections, each cylinder section and its discharge chamber formed in a single casting and bolted together at their discharge chamber ports in the discharge chamber ends of t e ends, suction and dischar e v cylinder sections and beyond the plunger 4 movement, suction valves mounted to open inside. the cylinder sections opposite the discharge ports and beyond the plunger movement, and suction and discharge valve seats and valves connected together to be in- A serted and removed as a unit. preferred construction shown in Fig. 4,' also,

lrod 38' may be released 5. A pump cylinder having a valve chamber integral therewith, suction and discharge valve seats formed se arately' from the cylinder yandarranged in ine with each other, suction and discharge valves, a valve rod on which the suction and discharge valves and valve seats are mounted, devices place and engaging the valves and valve seats thereon, arranged for the removal of one valve and its seat'from the rod while retaining the other valveand or removing both vlaves from the rod successively, andI removable holding devices for the rod whereby the rod with the valve and valve seats thereon may fromthe valve chamber.

6. A pumppcylinderhaving a valve chamber integral therewith, .suction and discharge valve seats formed separately from the cylinder and arranged vertically in line with each other with thesuction valve seat .'lbelow, suction and discharge valves, a valve rod on which the suction and discharge valves and valve seats are mounted, devices for holding the rod in place and engaging the valves and valve seats thereon arranged for the removal of the discharge valve and its seat from the rod while retaining the suction valve and its seat in place or removing both valves and their seats from the rod successively, and holding devices for securing the lower end of the rod in the suction chamber wall, including a packing device arranged to release the,I rod without permitits seat in place A and their seats ting escape of fluid, whereby the "rod with the valves and valve seats thereon maybe withdrawn from the valve chamber without draining the suction chamber.

7. A valve chamber having suction and' discharge valve seats settherein in line with each other, a rod on which the valve seats are mounted, suction and discharge valves mounted on the rod, independently removable holding devices secured on the rod for the discharge valve and for the suction valve whereby one of the valves and its seat may beremoved from the rod independently of the other or both valves may be removed successively, and removable holding devices for securing the rod in place whereby the rod may be removed with both the valves and their seats thereon.

8. A valve chamber having suction and discharge valve seats set therein in line with each other, a rod on which the valve seats are mounted, suction and discharge ,valves mounted on the rod, independently removable holding devices on the rod for the discharge valve and for the suction valve whereby the discharge valve and its seat may be removed upward from the rod independently of the suction valve and its seat or both valves and their seats may be removed successively, and removable holding devices for securing the rod in place in the suction chamber wall including a packing device arranged to release the rod without permitting escape of fluid from the suction chamber, whereby the rod may be moved with both valves and their seats thereon without draining the suctionrhamber.

l 9. `A valve chamber having suction and discharge valve seats and valves therein in line with each other, a rod on which the valves and valve seats are mounted, holding devices for the valves on the rod, and Lholding 'devices for securing the rod in place in the suction chamber wall including a packing device arranged to release the rod without permitting escape of fluid from the suction chamber, whereby the rod may be removed with both valves and their seats lt)hereon without draining the suction cham- In testimony my hand in the witnesses.

whereof, I have hereunto set presence of two subscribing WILLIAM B. HEWITT. Witnesses:

WALTER D. HANLEY, THos. NEIL.

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