US2240371A - Pump - Google Patents

Description

April 29, 1941. H. A. UNCH ETAL PUMP Filed Dec. 14, 1939 7 Sheets-Sheet 2 GMM,

ATTORNEY.

April 295 1941. H. A. LxNcH ETAL. 2,240,371

PUMP

Filed Dec. 14, 1939 '7 Sheets-Sheet 3 v f/l/f/VTOP/S.'

v7/PPV 6. UVC/f, @H4/afs H. 50077,

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ATTORNEY.

April 29, 1941. H. A. LlNcH ETAL PUMP Filed Dec. 14, 1939 '7 Sheets-Sheet 4 ATTORNE i.

April 29, 1941. H, A UNCH ETAL 2,240,371

PUMP

Filed Dec. 14, 1939 7 Sheets-Sheet 6 .5)/n' L ATTORNEY.

Apri] 29, 1941.` H. A; UNCH ETAL 2,240,371

PUMP Y Filed Dec. 14, 1939 7Sheets-Sheet '7 Fl l m un 76.10.

i 25 n d IIIIIIIIIIIIIII' ATTORNEY.

Petented Apr. 29, 1941 PUMP Harry A. Linch and (lharles- H. Scott, Westport, Conn., assignors to The Dorr Company, Inc., New York, N. Y., a corporation of Delaware Application December 14, 1939, serial No. 309,138

Claims.

This invention relates to sngleor doubleacting pumps and more particularly to diaphragm pumps.

Some of the broader objects are to produce a pump which is simple, compact, and yet accessie ble with respect to the renewal of parts that are subject to wear and require inspection, such as the diaphragms and the valves; which pump furthermore is volumetrically ecient.

More specific objects are to facilitate the maintenance of the valves, such as ball valves; and to provide pump diaphragms which are conveniently and expeditiously exchangeable.

The above mentioned more general objects are attained by having the power drive means and drive elements supported directly by the pump housing.

The more specific objects are realized in that there are provided valve seats which are exchangeable through a hand-hole in the pump housing; and in that the annular diaphragm elements are formed with special inner and outer marginal portions enabling them to be conveniently clamp-fastened in the pump 4substantially without necessitating the dismantling of parts of the pump.

According to one feature a double-acting pump housing has its two pump chambers arranged side by side in a unit, and above and supported by the `housing extends ai frame upon which are mounted the drive and the drive elements.

According to another feature, the membrane plungers or rods are disposed at an angle, that is to say, in V-arrangement with respect to one another, and hence in a manner to avoid the entrapment of air underneath the diaphragms, and toinsure volumetric efllciency of the pump. Other features reside in the construction of the pump housing per se, in that each pump chamber is represented by an individual-castinxboth castings being substantially identical and bolted together to form a symmetrical two-chamber hous-` ing construction. More specifically, the flanged portions whereby the two castings are bolted together, also form a pan forY collecting any possible leak water from the diaphragms.

Still other features have to do with the arrangement of the drive elements.

According to another feature the annular pump diaphragms are formed with beaded inner and outer edge portions whereby they can be conveniently and expeditiously clamp-fastened to their respective portions of the pump substantially without dismantling of any parts thereof. Also a diaphragm thus constructed represents a new article of manufacture per se.

According to one of a number of embodiments, this is a self-contained power driven* unit, each end of the two-chamber pump housing having an upwardly extending portion constituting the bowls for the respective outlet valves, and at the same time constituting supporting posts or the like for a horizontally extending frame construction to extend above the pump housing and upon Awhich the drive is mounted. The pump plungers are arranged at an angle or in V-shape with respect to one another, and the planesv of the respective membranes are correspondingly inclined toward one another and towards the center of the pump'housing. A rocker shaft works the plungers in alternating fashion, and a' power-driven crankshaft also mounted on the frame, through a connecting rod oscillates the rocker shaft, motor and reduction gearing, etc. also being "placed on that frame, making this a self-contained power-driven unit.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description. In the following description and in the claims, parts will be identified by specic names for convenience, but they are intended to be as generic in their application to similar partsv as the art will permit. In the 'accompanying drawings there has beenillustrated the best'embodiment of the invention known to me, but such embodiment is to be regarded as typical only of many possible embodiments, and the invention is not to be limited thereto.

It should be understood that some of the features of this invention, such as the 4pump housing with its superposed drive supporting frame, are not limited to diaphragm pumps but may include other types of plunger displacement pumps.

The novel features considered characteristic of my invention are set 'forth with particularity in the appended claims. The invention itself, however, both as to its organization and its method of operation," together with additional objects and advantages thereof, will best be understood from the following description of a specific einbodiment when read in connection with the accompanying drawings in which:

Fig. 1 is a longitudinal part sectional View of the pump, with frame elements or beams supported directly `by and fastened to the pump hous ing,"for supporting the drive.

Fig. 2 is a plan view taken upon Fig. 1.

Fig. 3 is a partial end view taken along the line 3-3 on Figs. 1 and 2 respectively.

Fig. 4 is a partial cross-section along the line 4 4 in Figs. 1 and 2 respectively.

Fig. 5 is a view similar to that of Fig'. 1, of a pump in which the supporting frame for the drive constitutes a manifold for common delivery from both discharge valves.

Fig. 6 is a plan view of the machine shown in Fig. 5.

Fig. '1 is a cross-section along the line 1-1 taken in Figs. 5 and 6 respectively.

Fig. 8 is an enlarged detailed perspective view of the plungers in V-arrangement taken from Fig. l, and some of the driving elements therefor.

Fig. 9 is a sectional viewtaken from Fig. 1, showing details of the exchangeable valve seats.

Fig. 10'is a section taken along the line IIJ-I8 in Fig. 9.

Fig. 11 is a section taken along the line II-II of Fig. 9.

way of the hand hole. 25a for inspection or the like. The parts in the valve I1 are substantially the same as the ones just described for the outlet valve I8, and accordingly the inlet valve com-v prises a loosely movable valve body or ball 21,

l are held in place by means of lugs 3I and 3io Fig 12 is a section taken along the line I2I2 of Fig. 9.

According to Figs. 1 and 2 the pump housing is collectively designated by numeral I0. It'consists of two symmetrically arranged pump chambers II and I2 respectively, each in the form of a casting or housing portion I3 and I4 respectively, and each constituting one-half of the pump housing I0, bothhalves being bolted together' at the center of the housing as indicated by flange and bolt connection I4a. Each half also has splash walls I4b, all splash walls in assembly constituting a splash trough and also serving as reinforcements to make this a rigid unit. The housing portions I3 and I4 are symmetrical to one another, each having an inlet and outlet valve comprising a loosely movable valve body in the form of a ball. The inlet or suction responsive valve in the lefthand housing portion I3 has the collective numeral I5, the outlet or pressure responsive valve in that housing portion having the numeral I8. In the righthand housing portion I4 the inlet valve is Vat I1 and the outlet valve at I8. Inasmuch as the respective valves for both halves of the double lacting pump are identical it will suffice to describe those of the righthand halfor housing portion I4. The outlet valve I8 is located upwardly of the pump chamber I2 in a valve chamber I9 here shown to be part of the casting or housing portion I4 and to connect and communicate through a neck 2U with the pump chamber I2. The valve |18 proper comprises a loosely movable valve body in the form of a ball 2I, an annular valve seating element 22 for the ball, which seating element in turn is removably seated in the housing portion I4, an annular securing member 23 overlying the seating element 22 and held down and in place by a set of rods 24 rigidly connected with and extending downwardly from a hand hole cover 25 closing the hand hole 25a., provided inthe top of the valve chamber I9 (see also Figs. 9 to 12). Theannular securing element 23 has attached to its upper face resilient loop members 26 as of iiat spring steel and representing slightly re' `the diaphragm itself as 40.

extending from the interior of the wall of Vthe pump housing, and by a third lug 32 extending from a hand hole cover 33 closing a hand hole 34 in the pump housingnnext to the valve I1. The three lugs 3|, 3Ia, 32 normally engage each upon a corresponding resilient loop element 30, thus keeping under a certain resilient pressure the valve seating element 28.

The pump housing I0 as a whole has a pair of inlets 35 and 36, one for each of the pump chambers II and I2, and accordingly a pair of outlets 31 and 38 located above.

In the left-hand housing portion I3 an opening of the pump diaphragm is designated as 39 and Similarly in the right-hand housing portion I4 thereis an opening 4I for a diaphragm 42. There is a pair of alternately reciprocal actuating or plunger rods 43 and 44, each of which is connected with a respective diaphragm or 42 in a manner exemplified in the right-hand housing portion I4 and presently to be described.

'I'he diaphragm 42, similar to diaphragm 40, is of annular construction and its outer and its inner margin is formed with a beaded portion 45 and 46 respectively. The housing I4 is formed with an annular depression, and so is an annular clamping member 41, the beaded portion 45 of the diaphragm thus being closed in between respective annular depressions and securely held when the clamp member 41 is screw bolted to the housing as indicated at 48. Similarly the inner beaded portion 46 of the diaphragm is held clamped between a disc-like pory tion 49 xedly connected with the actuating rod 44, and an annular member 50 screw bolted as at'5I to the disc-like portion 49.

There follows now the description of the frame construction supported upon and by the pump housing I0, and in turn supporting the drive means mounted on the frame:

The frame construction comprises a pair of parallel beams here `shown to be channel irons 52 and 53 placed symmetrically over both chambers of the pump housing III (see Figs. 1 and 2), in that the beams 'at one end aremounted upon lthe valve housing I9 and at .the other end are mounted similarly upon the opposite valve housing .I 9a,

A rocker shaft 54 is mounted centrally uponand extends transversely of the beams 52 and 53 i n journals 52a and 53a, and it has a pair of silient footings upon which the" rods 24 are'deopposedly arranged arms 51 and 58 rockable therewith and pivotally connected with Ithe actuating rods 43 and 4.4 to reciprocate the same when the rocker shaft 54 is rocked. The rocker shaft 54 has fixed to it an arm 59 having thereon a slide block positionable'for pump stroke adjustment, the position of the slide .block being controllably xed by a spindle 6I. 'I'he rotation of the spindle by manipulation ofthe crank handie 62 will positionthe sliding block 60 anywhere along the arm. depending upon what length pump stroke is desired.

` The sliding block 66 is pivotally connected with a connecting rod 63'to oscillate the arm 59 due to Ithe rotation of a crank shaft 64 horizontally spaced from the rocker shaft 54 and journalled in bearings 65 and 66 upon the beams 52 and 53 of the frame construction.

In between the rocker shaft 54 and the crank shaft 64 Ithere is-a countershaft 61 mounted upon .the beams 52 and 53 by way of journal bearings 66 and 69, and having fixed at one of its free ends a pinion 10 meshing with a companion spur gear 1I. The other free end of the countershaft 61 has xed thereto a sheave 12 driven by a belt 13 from the pulley 14 of 'a motor 15 which motor again is mounted upon the beams 52 and 53 and horizontally spaced from -the rocker shaft 54 in a direction opposite to the spacing therefrom of The construction of a' double acting pumpv according to Figs. 5 and 6 differs from the construction of Figs. 1, 2, 3, 4.and 8 mainly by the design of the frame construction -that supports the driving elements.

In the embodiment of Figs. 5, 6 and '1, a horizontally extending frame construction 16 is shown to rbe in the way of a casting integral with a valve housing 11 at one end and a valve housing -18 at the other end, .the frame as a whole being placed upon a two chamber lpump housing 19, thereby connecting the one valve housing 11 of the frame with an upwardly extending neck portion 66 of the pump housing, and correspondingly connecting the other valve housing 16 with an upwardly extending neck portion 6I of the pump housing. 1

The frame or casting 16 has a hollow conduit portion 82 (see Figs. 6 and 7) serving as a manifold interconnecting both loutlet valve housings 11 and 16 to lead their respective discharges into a common outlet 63, and a. solid portion 62a, the

`portions 62 and 62a otherwise serving as beam elements for Ithe support of the drive elements, similar to the drive supporting functions of the beams 52 and 53 in Figs. 1 and 2.

Another modification of parts over the arrangement of Figs. 1 and 2 is found in the arrangement of some of the drive elements in Fig. 6, namely, in that a rocker shaft 84 h-as an oscillator arm 65 disposed outside the frame coning plane and aligned with respect to one another. 96 and 91 in Fig.v 7 designate beams upon which the pump as a whole is mounted.

It is a common feature of both embodiments of this double acting pump, namely, 'that of Fig.

1 and that of Fig. 5; for the pump housing to b'e formedwith extra Wall portions enabling the housing to act as an interceptor or catch for liquid that may leak vout due' to'a defect of the diaphragm. In Fig. 1 such wall portions are 'designated by the numeral I4b, and there is also yshown .a drainopening I4c through which leak water may escape. Similar provisions for leak water interception and drainage are made in the embodiment of Fig. 5.A

In Figs. 1 and 2 it will be further noted that there are ' lateral flange portions 93 and 94 respectively extending inwardly from the wall portions I`4b, and whereby the housing portions I6 and I4 are bolted together. Another flange por.

tion, however, located at the center of the flange connection is-shown at 95 to extend outwardly and downwardly rather thanv inwardly, for convenience and so that the clamping rings 41 may be cleared. A similar connecting flange arrangement is shown in embodiment of Fig. 5.

The operation of this double acting pump as such is thought to be self-explanatory from the foregoing detailed description thereof. Other- Wise, it will be seen that Ithe machine as a whole is self-contained, and compact, and of low headroom requirements, and yet with all parts well accessible. The valve seats are accessible and exchangeable.

The pump diaphragms are capable of being .exchanged without necessity of dismantling the machine. For example the diaphragm 42 in Fig.

l can be removed and exchanged by simply loosening up on the bolts 46 and thereby releasing the annular clamping member 41 suillciently to permit the vbeaded portion 4 5 to slip out of its seat in the annular depressions. Similarly the inner beaded portion 46 can be released from between the portion 49 and the annular clamping ring 56. The material of the diaphragm as such i has sumcient stretch to permit it to be slipped struction 16 -rather Ithan inside, and accordingly has a crank shaft 86 provided with a crank at its free end from which to actuate the oscillator armv through a connecting rod 81. 'Ihe rocker shaft 64 is shown .to be journalled directly in the vframe or casting 16, an end bearing 61abeing part of the inner wall of the manifold portion 62, a journal 66 heilig part of ythe vframe portion 82a opposite to the manifold portion 62 of .the frame.

Numeral 96 designates a guide member (see Fig. 5), having lost motion connection with a pair of actuating rods `9| and 92, and intended to maintain these actuating rods in their operatdownward and out over the portion 49.

It will be further noted, for instance from Fig. 1 that castings I3 and I4 of the pump housing are identical and symmetrically arranged and connected with one another by means of the bolt connectionY I4b. Hence the form required for casting will be but one-half of the entire pumphousing, and the housing can be shipped in halves to be bolted together in assembly.

kOne operating feature is particularly indicated in Figure 5, namely the feature which is inherent to the inclined planes of the pump diaphragms. In Figure 5 are indicated the extreme operating positions of the diaphragms, in`full and dotted' lines respectively. 'Ihese are the end positions of the suction-and of the pressure stroke respectively of the pump. The drawing makes it clear that due to the inclined position of the diaphragms the pump will automatically displace whatever air may be trapped underneath the diaphragm, causing the same to escape upwardly to the pump outlet.. This makes for volumetric eiliciency of the pump.

It should further be understood that some of the features of the construction herein described for a double action or Duplex pump can be embodied with equal advantage in a single action or Simplex pump.

For instance, the feature of the inclined pump diaphragm may be visualized as being embodied in a single acting-or single chamber pump. Therefore the construction of Figure 1 may be interpreted as representing a single-acting pump chamber I2, while the other pump chamber Il may then be considered as a structural extension of the chamber l2, adapted to help supporting the frame structure 52, 53 above.

According to Figure 1, outlet openings 31 and 33 respectively may b provided at either side of the valve chambers I9a and I9 respectively. One pair of openings on one side may be closed, while the other pair of openings may be connected by a manifold (not shown). In this way it is optional which side of the pump to arrange for discharge. vAlso due to symmetry the same pattern can be used for both pump chamber castings, the same as with the symmetrical pump chambers in the construction of Figure 5,.

We claim:

1. A double acting pump comprising a twochamber pump housing having a pair of individual pump chambers side by side, a substantially horizontally extending frame disposed above and supported upon said pump housing at points represented by the respective outer end portions of the two pump chambers and which points are opposed to one another, a pair of re- Vciprocable liquid displacing elements operable in alternation in the respective pump chambers, drive means lmounted upon said frame, for actuating said 1iquiddisplacing elements.

2. A pump according to claim 1, in which each said frame.

3. A pump according to claim 1, in which each of the liquid displacing elements comprises a diaphragm and a plunger rod connected substantially at right angles therewith, the plunger rods being disposed in the way of an inverted V with respect to one another, the planes of the diaphragm being correspondingly downwardly inclined towards one another and towards the middle of the pump housing, and in which said drive means comprise a rocker shaft having a pair of opposedly direotedarms each of which is connected with a corresponding plunger rod, an actuating arm fixed to said rocker shaft, a crank shaft parallel to and horizontally spaced from said rocker shaft and a connecting rod driven'by the crankof said vcrank shaft and connected with said actuating arm for rocking the rocker shaft.

' comprises a diaphragm and a plunger rod connected substantially at right anglesV therewith, the plunger rods being disposed' in the way of an inverted V, the planes of the diaphragms being correspondingly, downwardly inclined towards one another and towards the middle of the pump housing, and in, which said drive means comprise a. rocker shaft journaled on said beam elements and having a pair of opposedly directed arms each of which is connected with a corresponding plunger rod, anactuating arm fixed to said rocker shaft and extending downwardly between the said beam elements and directly towards said housing, a connectlngrod pivotally connected with said actuating arm, a crank shaft operatively connected with said connecting rod for driving the same, which crank shaft is horizontally spaced from and parallel to said rocker shaft and also journaled on said beamelements, and means comprising a threaded spindle for adjusting the connecting rod t9 various positions along the actuating arm for varying the pump stroke.

6. A pump according to claim 1in which the pump housing comprises a pair of symmetrically disposed castings each of which represents a pump chamber, both castings having at their inner ends a ange connection whereby they are bolted together.

7. A pump according to claim 1, in which each pump `chamber has a discharge outlet portion at the outer upper end thereof, and in which the frame itself constitutes a common manifold for the discharge outlets of both pump chambers.

8. A pump according to claim l1, in which each pump chamber has an outlet portion, and in which said frame is a unitary casting each end of which is supported upon a respective outlet portion, said frame representing a' common manifold for said discharge outlet portions, which frame has each of its end portions formed in the way of a discharge valvechamber adapted to connect and communicate with a respective pump outlet portion on theassociated pump chamber.

e 9. In a double acting pump a two chamber pump housing comprising a. pair of symmetrically disposed castings each of which represents a pump chamber, both castings having at their inner ends between them a flange connection whereby they are bol-ted together, each casting having a diaphragm opening, the planes of which openings are inclined downwardly towards one another and towards the central portion of the housing, and a pump diaphragm associated with each opening.

10. A pump housing according to claim 9, in which said castings are formed with anged together wall portions forming a liquid collecting pan having its greatest depth substantially at the central portion of the housing.

11. A pump housing according to claim 9; in which each chamber has an inlet portion at the bottom and an outlet neck portion extending outwardly and upwardly at 4the free'end thereof.

12. A pump housing according to claim 9, in which each chamber has an outwardly and up- 'wardly extending outlet portion formed as a valve housing.

13.*In a diaphragm pump, a housing representing a pump chamber having an inlet and anV outlet, and in which the diaphragm is disposed intermediate said inlet and said outlet, characterized by the fact that the plane of the diaphragm is inclined relative to the horizontal and thereby adapted to displace air trapped underthe diaphragm, that the inlet portion is provided at the bottom of the housing, the outlet portion provided at the top ofthe housing and extending upwardly from adjacent to the upper edge portion of the diaphragm, and' that the housing has a structural extension-comprising a vertical flange portion disposed'thereon oppol site to said. outlet portion.

14. A diaphragmpump comprising a housing having a pump chamber, a pump diaphragm connected with said housing and disposed at an angle relative to the horizontal, said housing having an upwardly directed outlet portion, an extension part extending rigidly from said housing opposite to said outlet portion, a. frame construction extending above said housing and having its respective ends supported by said outlet portion and said extension part respectively, an 10 actuating element` for reciprocating said' diaphragm, and drive means disposed upon and supported by said frame, for actuating said diaphragm.

15. A diaphragm pump according to claim 14, inliwhich the extension part has a vertical flange connection with the housing.

HARRY A. LINCH. CHARLES H. scoTT.

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