US1777647A - Valve - Google Patents

Description

Oct. 7, 1930. J. P. MARCHAL 1,777,647

VALVE Filed May 4, 1928 4, INVENTOB.

flY 0940216.

.11 TTOEJYEY Patented Oct. 7, 1930 r JOSEPH P. MARCHAL, or s'r. PA L, MINNESOTA {VALVE i Application filed May 4, was; Serial mama.

I-My invention relates to plate valves particularly adaptable for use in ammonia plants, compressors or other places :Where liquids, gaseous element or saturatedgases areipumped, asby means of a piston, from one placeto another The main object ofthe invent-ion'is to provide a very simple, highly eflicient but inexpensive valve einbodyin'gcertain features of construction and simplicity suchthat its operation is not subject to clogging by metal particles and the flow ofliquid or other elements is freeand unobstructed. An importantfeature is the single and simple valve plate so seated and operatedthat its a 11? opening movement is very short yet allowing for maximum flow of gases or liquid, The plate stroke being very short itlis obvious that'the slapping action of al'ong stroke actionis eliminated.- Further objects and advantages of my valve will be fully set forth in the following spcificatiommeference being' had to the accompanying drawing, in

:bFig. 1 isa'front end elevation of my improved valv'ez c w M Fign E isa side-elevationof my device, shown partlyin section. 1 Fig. 3 is a; rear endclevation, or might be considered as a-right-hand end elevation of Fig. 4 I is mainly a longitudinal, central, section of what may be considered the head or compression chamber,; intake and outlet partsof an ammonia pump as usedfor refrigeratingplants and illustrated as an example ofthe meet my devices, two of said devices forming amodi fication ofthe valve in Fig. 1 being shown inoperative position inlongitudinal section. T t, -f Referring to thedrawing by reference numerals I will. first describe the-compressor head of an ammonia pump engine used as an illustration o'f -the-use of my device though it is obvious that the ,device maybe used either singly :in straight 2 bore conveying means not shown, or inpairs in ahead as shown. 3 .The compressor head comprises a casing 5,,bored as 6for a reciprocable piston 7-,," Sand 9 are respectively intake and outlet Qha bQ si he h ad -th former ha ng an intake port 10. Each chamber has a bore communicating with the compression chamber 13, said bore from chamber 8 being designated as 11 and the bore from chamber 9 designated 12. Both said bores are enlarged toward the chamber end providing a circular shoulder 14 serving as a seat for my valve cage, said seat may be provided with a circular groovefor a packing ring 150f any suitable compressible material. Thehead end the compressor may be threaded andclosed centrally of each chamber with a threaded cap 16having a polygonal outerpart 16H to be engaged by a wrench. 1

My device comprises a round cage of cylindrical appearance inserted in the chambers 8 9 toward the piston and has a shoulder adapted to engage the seat 1401 its vpacking ring15and be pressed toward the seat 14 by means presently to be described. V

In the form of my devices shown in Fig. 4

each device comprises two similar cylindrical body members or casings ofidentical diameter towardtheir free ends, said members hereinafter designated as the front casing member '17 F and the rear casing member as 17R, both casings being formed with enlarged circular flange at their adjacent faces, one casing providedwith femalethread and; the other withmale thread to connect them concentrically, saidthreads being designated as 18in Fig. 4, to flange of casing 17F designated as 17F and the corresponding flange of17R designated as-17Rt .Intthe' upper partof Fig. 4,chamber 9 isoccupied by a removable metal sleeve r19 slidable into the, large part ofbore'12 andits inner perimetral edge arranged tobear against flange 17R, its outer edge beingengaged bythe'threaded plug or cap 16 which maybe adjusted to thus press-my device securely and air-tight against the seat 14 and its packing15; In the lower part'of Fig.4 my device is the same as in the upperchamber but instead of a sleeve19 I use a center pin 20 threaded in cap 16H 95 i and extending inwardly to engage asmall central counterbore 21 in the end of my de vicel 20H is the head of this pin exteriorly of the cap 16H and 22 is a lock nut under it. Ih xs y l9JIl St e men edth s i bl outlets 23 for free passage of liquids or gases to chamber 9.

In Figs. 1, 2 and 3 my device is shown with no exterior flange, it being made with a plain cylindrical eXterior, the casings 17R17F threaded together as in Fig. 4 but only the abutting edgesbeing indicatedby line 24. At the perimeter of the opposite end faces they are chamfered, as 25 and said angular faces preferably each having a groove 26 to receive a circular packing ring such as 15 in Fig. 4. It will be understood that these faces 25 are angular or curved to correspond to the shape of seats to which the device'is to be clamped.

I'will now describe the plate valve, its'automatic actuating means and the arrangement and operation of ports in the opposite members 17F and 17 R. 1

Considering casing member 17F as the frontmember ofmy device, I provide a single row of circularly spaced holes 27 longitudinally therein, the inner ends of said holes communicating with a circular recess 28 in the inner face of said casing. Concentric of this recess is provided smaller outer recess 29 and a like inner recess 30 the circular faces thus provided between the recesses 2829-30 comprising a seat for the valve plate 31 which resembles a common washer normally pressed against its seat by a single helical coil spring 32, made either of flat spring material as shown in the upper valve in Fig. 4 or of spring-wire as shown in the lower valve in said Fig. 4.' Said spring is seated in a circular pocket or counterbore 33C in casing1-7R, and said counterbore being simply an inward continuation of a larger bore or pocket 33 in the inner face of casing 17B (see Fig 4) Said casing is provided with two circular concentric rows of holes of which the outerones are designated 34 and the inner ones as 35, (see Figs. 3 and 4), said outer holes being arranged in a circle of such diameter that they communicate vwith the recess 29 of casing 17F and the inner holes (ligilrrlmunicate with recess v30 of said casing It will be readily seen that the valve plate can only travel as'much' as the depth of bore 33 in casing17 R will permit against the pressu're of th'espr'ing. The area of holes 34 and 35 must be greater than the area of holes'27 in casing 17F," In Fig." 4 it will be'seen that thelower valve plate 31 is drawn back from its seat, and although the distance it travels is short there is ample opening thus provided for liquids or gases to be drawn through apertures 27 andthence by said valve plate and 1 through the holes 34 and 35 into chamber 13 when the piston moves away'as to the left,

I indicated by arrow36 (Fig. 4) and creating a semi-vacuum'or suction which causes the valve plate to be moved against thespring action." The area of holes or ports 34-35 beliquids in the chamber will be expelled from the pump as through theupper valve in Fig. 4, said upper valve being mounted to operate in the opposite direction to the lower one and the gases or liquids pass through it under compression, out of cage 19 through its ports '23 and chamber 9 and to any suitable outlet (notshown) from said latter chamber.

From the above description the use and operation of my improved valve will be readily understood. a

'I claim:

1. Ina valve comprisin two casing mem bers adapted to be detacha 1y connected face to faceand means for securing said valve in a bore and to regulate passage of gases or liquids therethrough; said casing members comprising an intake member provided with a large circular recess in its inner face and two concentric smaller recesses one outwardly and one inwardly of said large recess and a row of-ports in said member communicating with said large recess; the other member comprising an outlet'member provided with two concentric circular rows of ports aligned to communicate with said outer and inner recesses of the inner face of the intake casing, a ring shaped valve plate normally closing said large recess of the intake member, spring means pressing said plate to seating position thereon, said valve plate adapted to yield from its seat position against the pressureof said spring means when the pressure thereon through the ports of the intake casing is greater than the pressure in the portsof the outlet casing.

2. The structure specified in claim 1 in which said plate valve is of washer shape, and said outlet casing is provided with a similarly shaped shallow recess for the said plate to reciprocate in, and a' secondary deeper recess concentric of said shallow recess, a helical compression coil spring seated in said latter recess and normally pressing said valveplate to position against the adjacent face of the intake casing.

'3. The structure specified in claim 1 in which said plate valve is of washer shape, and'sa'id outlet casing is provided with a similarly shapedshallow recess for thesaid plate to reciprocate in, and a secondary deeper recess concentric of said shallow recess, a helical compression coil spring seated in said latter recess and normally pressing said valve plate to position against the adjacent face of the intake cas'ing, said valve plate being'of outside and inside diameters of such size as to leaveofree communication betweenthe ports of the outlet casing and the smaller recesses of the intake casing, and said plate arranged to open free passage from said ports in the intake casing and through both sets of ports in the outlet casing.

hThe structure specified in claim 1 in which the combined cross sectional area of the portsin the outletcasing are greater than the corresponding area of the ports in the intake casing, for the purpose set forth.

In testimony whereof I aifix my signature.

JOSEPH P. MARCHAL.

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