Патент USA US2405734код для вставки
Au. is, w46. ` H. s. COE ’ PUMPING APPARATUS 2 66 75‘75 65 7 î è 6g , 7265 67 53 70 74 « / 4,/ . ` /60 /6/ 76 @à lNVg-:NTOR Har/'won .i Coe www YI ATTORNEY Au., n, ma H. s. COE ,405,73 PUMPING APPARATUS Filed Aug. 19, 1944 2 Sheets-Sheet 2 40» 42'l /0 47v . „ ï 65, U 57 / v k /0/, D 95 o ? ~ __93 Ñ , , Í lNyENToR . ?/arr/son 5. Coe 'BYWMZMM ATTORNEY Patented Aug. 13, 1946 UNITED 2,405334; STATES ` PATENT . OFFICE 2,405,734' Y " . ~ PUMPING APPARATUS Harrison S. Coe, Palo Alto, Calif. Application August 19, 1944, Serial vNo. :550,240 14 Claims. 1 This invention relates to a pumping apparatus of the type in which an impelling liquid body which is actuated by a piston in a cylinder acts against a diaphragm, causing_it to pulsate in alternate suction and pressure strokes and there by to admit and expel the liquid being pumped from a pumping compartment formed at least (ci. 10s-_44) ` ' 2 to provide means to prevent air from accumulat ing in the impelling liquid compartment and to replace liquid escaping therefrom. It is a further object of the present invention to provide means to introduce liquid into the impelling liquid compartmentl and to expel liquid in part by said diaphragm. The diaphragm in therefrom ’and thereby .remove heat generated therein. this type of pump serves principally to separate _ Other objects and advantages will appear from the liquid being pumped from the impelling liquid 10 the following specification and drawings .in and prevent the former from contacting the piston and cylinder and cause undue wear or which: Figure 1 is a side view, in cross-section, of a corrosion where abrasive or corrosive iluids arev diaphragm'vpump incorporating the preferred To obtain eñicient operation in a pinnp of this embodiment of my invention. Figure 2 is a cross-sectional detail taken along being pumped. type, the .diaphragm must pulsate freely, or with out undue strain, in its expansion and contrac tion .of the pumping compartment. Since, for like .positions of the piston in the cylinder, the the line 2-2 of Figure 1. ~ Figure 3 is a cross-sectional'view taken along the line 3-'3 of Figure v1`. Figure 4 is a modification of the invention degree of expansion or contraction 'of the pump 20 illustrated in Figure 1 'in which a diiïerent type ing compartment depends entirely upon the vol of diaphragm is used. ume of impelling liquid in the pump, it will be As shown in Figure 1 there is provided Va cham obvious that the free movement of the `dia ber lIU of oblong oval form, which is provided phragm, throughout a stroke of the piston, can with annular flanges l! and I2 at its upper and only be lmaintained if the impelling liquid re 25. lower ends. Mounted above chamber Iû is a suit mains constant within narrow limits. able outlet valve body I3 which is secured ‘thereto While this class of pump has marked advan by suitable bolts 'through cooperating flanges I2 tages over ordinary piston pumps where abrasive and Ill. An airtight and liquid-proof seal b'e or corrosive liquids are to be handled and is used tween these members is obtained by the use of under some especially severe` conditions i-n the a' suitable gasket I 5. Mounted within valve body pumping of mud in drilling of oil wells and like rI3 I have provided a poppet type valve I6 adapted services, its application, up to the present, has to move longitudinally and to Vbe operated by been very restricted, because of leakage of fluid differential pressure thereon. Valve I6 is >nor past the piston that actuates the impelling liquid. mally maintained in the position shown in vFig This leakage is never completely avoidable and 35 ure 1 b-y gravity. When the pressure in body I3 has kmade it necessary to stop the pump ai', inter below valve I6 sufliciently exceeds the pressure vals, dependent upon the rate of leakage, and in the larea above the valve, the same is opened. adjust the volume of impelling liquid and dis When .the pressure in body vI3 below valve I6 is place any accumulated air in the impelling liquid less vthan the pressure in the area above the valve, compartment. Another factor tending to limit 40 the same maintains the position shown in Fig the application of the type of pump under con ' ure 1. vValve‘lbody I3 extends downwardly into sideration has been the deleterious effect on the chamber I0 forming a cylindrical projection Il, apparatus and its operation produced by the the use of which will hereafter .be explained. overheating of the impelling liquid due to its Secured to the lower end of chamber Il@ and friction in the pump. projecting inwardly thereto I have provided a Another factor which has heretofore presented ' cylindrical member I8 provided with orifice I9. difficulty in this type of pump arises from the Also secured to the lower end of chamber IU by tendency of solids and air, separating from the suitable bolts and gaskets, is a valve body 20 and material rbeing pumped, to accumulate in parts its cooperating poppet valve 2I of the same type of the pumping compartment .and interfere with 50 as vvalve I6 and likewise operated .by differential eñicient operation. ~ It is an object of the present invention to pro - pressures within body 26. The entire device is ' suitably connected .to a source of material to be vide means to maintain the diaphragm in posi pumped as "by means of flange 22. tion to pulsate freely .and without strain. Within chamber -I0 I have provided a -dia It is a further object of the present invention 55 phragm .or tube 30 made .of ilexiblematerial such 2,405,734 3 Y as natural or synthetic rubber, which is secured at its ends to members I1 and I8 respectively by any suitable means to provide a liquid-proof seal. As shown in Figure 1, diaphragm 30 may be se cured to members I1 and I8 by clamps 3|. Ex tending downwardly from member I1 within tube 3l), I have provided an annular guard tube 32 to prevent the collapse of tube 30 into valve body I3. Chamber Ill is provided with a cylindrical >out let 4Il'which is in communication with cylinder 4I. Within cylinder 4| there is a reciprocating piston or plunger (not shown) adapted to re ciprocate longitudinally therein as indicated by the arrow. On that portion of diaphragm 30 op posite oriñce 40 I have provided a metal plate 42 which is adapted to act as a shield against the direct impact on diaphragm 3D cf'liquid entering chamber I0 through orifice 40 during the pressure stroke of the piston and to prevent diaphragm 30 from being drawn unduly toward or into oriñce 40 during the suction stroke of the piston. Dia phragm 30 is preferably iluted as shown in Figure 3 in order that the same may be expanded and contracted with the minimum of “stretching” As will hereinafter more fully be explained the space within chamber l0 and outside of dia phragm 30 is termed an impelling liquid compart ment, and the same is ñlled with liquid herein after called impelling liquid. of the piston within cylinder impelling liquid is alternately of the cylinder 4I thereby 4 means of circular orifice or passage 62. Valve means 60 is suitably secured to chamber III to in sure a liquid and air-proof seal therewith. Co axially mounted within housing 6I I have pro vided a cylindrical member 63. Extending into the impelling liquid compartment through orifice 62 I have provided a push rod 64 adapted to op erate valve member 65, which cooperates with valve seat 66. Valve 65 is mounted adjacent one side of a piston 61 which is slidably mounted within cylindrical member 63. Valve 65 is Aadapted to close against seat E6, and when in engagement therewith prevents communication between housing 6I and chamber Iû. In order to maintain push rod 64 accurately aligned within orifice 62 to prevent jamming of the same, I have provided an axially aligneddnember 1I) adapted to cooperate with a cylindrical extension 1| upon piston 51. , Spring 12 is >adapted to urge piston 61 and valve 65 into closed position, that is, against valve seat 65. The interior of cylinder 63 is in communication with the space surround ing cylinder 63 by restricted orifice l13 in piston 61 and by oriñces 14 and 15 in cylindrical mem ber 63. Orifices 14 are provided with closure members 16 of the “pinched tube” type which permit expulsion of liquid 4from Within the cylin der 63 through orifices 14 but do not permit re turn of liquid into said cylinder through said Upon reciprocatìon 4I a portion of the 30 orifices. Orifices 13 and 15 are simple openings permitting inñow and outflow therethrough. It drawn into and out is obvious therefore that liquid may be expelled creating alternate suction and pressure pulsations within chamber I0. Alternate suction and pressure within cham ber I0 expands and contracts the area within diaphragm 30, known vas the pumping or im pelled liquid compartment thereby increasing or decreasing the pressure and volume within the from within cylinder 63 much more rapidly` than it may enter. Oriñces 68 are provided in cylin drical extension 1I to permit the entry of liquid therein and prevent creation of a vacuum. Hous ing 6I is also in communication with a source of liquid supply 5I through passage 11 and check valve 18. Check valve 1S permits the fiow of same. As will be obvious to those skilled in the art, compression of tubular diaphragm 30 causes 40 liquid from chamber 5I into housing 6I through the impelled liquid ,therein to be forced through conduit I3'past'valve I8. Expansion of tubular diaphragm 30 creates differential pressure within the same and draws liquid into the same through . valve 2|. As has previously been pointed out, on suction strokes of the piston within cylinder 4I a small amount of air may be drawn into the impelling ' liquid compartment and ultimately this air seeks passage 11 but prevents the expulsion of liquid from housing 6I through passage 11 into liquid chamber 5 I. ' . Operation of the device and method may vbriefly be described as follows: A quantity of `impelling liquid is placed in the pump suñîcient to establish pumping operation. The pump is attached to a source of material to be pumped by suitable con nection to ñange 22 on valve body 28. A quan the highest point therein. To provide an escape 50 tity of impelling liquid is placed in liquid supply chamber 5I, and valve A52 is opened. Reciproca for this air I have provided an oriñce 45 con tion of the piston within cylinder 4I as has pre nected by suitable piping 46 to a resistance means viously been explained, draws a portion of the 41 vconsisting of cylinder 48 within which I have impelling liquid within the impelling liquid com mounted a screw member 49.' Passage of liquid through orifice 45 is retarded thereby. Ball-_ 55 partment into cylinder 4I causing expansion of tubular diaphragm 30 creating a differential check valve 50 >within liquid holding chamber 5I pressure therein and drawing liquid into the prevents the sucking of liquid into the impelling pumping compartment through valve 2I. A liquid compartment on the suction stroke. A pressure stroke of the impelling ñuid contracts suitable valve 52 is provided in the event it is found desirable to adjust or close the escape sys 60 diaphragm 3i] and expels liquid from the pump ing compartment outwardly through valve I6. tem. As will be pointed out hereinafter, at times Air entering the impelling liquid compartment it may be desirable to vent a portion of the im would be trapped in chamber II! at its highest peiling liquid from chamber I0, and in that event point and would cause the difñculties previously bañie41 and check valve 50 would operate in the same manner as with the escape 0f air. I con 65 enumerated. Air would tend to be` expelled upon a pressure stroke through orifice 45 and resist template that liquid chamber 5I may at times ance means 41 into liquid chamber 5I. As a function as a heat exchange unit to supply cool liquid to the impelling liquid compartment. To permit the introduction of liquid into the matter of fact, under some conditions, air and liquid or liquid would be expelled through orifice impelling liquid compartment surrounding dia 70 46 to liquid chamber 5I. The flow through or iñce 45 may be controlled by resistance 41 and phragm 30, I have provided a novel valve means designated generally at 60. Valvermeans 6I! con siste generally of a cylindrical housing or inter valve 52 as desired. In the event liquid within the impelling liquid compartment escapesl through orifice 45 or mediate compartment BI which is in communica tion with the impelling liquidcompartment by 75 around the piston within cylinder 4I', it is ob 5 2,405,734“ 6 vious-thattubular `diaphragm 36 will expand and -will strike -push rod 6d and urge valve 65 Vaway 88 is slightly different in the modification shown in Figure .2i than as shown in Figure 1. Upward movement of diaphragm t1 upon a suction stroke causes diaphragm ‘8l to strike push rod 90 and from its seat 66, -thereby permitting communi cation between housing El , and chamber l0, through oriñce 62. When valve E5 is forced away from its seat yESS, piston 61 is moved into raise valve 9| from itsseat 92 thereby permit ting communication between impelling iluid com cylinder .63, forcing liquid outwardly -therefrom partment 82 and valve chamber 93. Y Upward through oriiices 13 and M. When, upon the fol movement of valve 9! causes expulsion ci liquid lowing pressure stroke, tubular diaphragm 3Q is above double piston arrangement 94 through the contracted, it is no ~longer in contact with push 1k rubber nipples `95 as previously explained in con rod 64, and spring 'l2 urges valve E5 toward closed nection with the operation of valve means '60. position. Valve `65 is prevented from closing in Figure 1. However the return of valve SI to rapidly by virtue vof the fact that the sole route its closed position issolely by gravity.l Rein by which liquid can reenter cylinder 63 is through troduction of liquid into the area above the dual> metering orifice 'F3 in piston Si' and oriiices 15. piston arrangement 94 is through orifices 96 Ori?ices 'l5 will be closed by piston Sl until valve therein. The dual piston arrangement is to in 65 isfnearly closed. When piston S'Iwopens ori sure perfect alignment of push rod @il in. the fices 15, they will permit a substantial increase orifice it@ in chamber 93. When impelling :fluid in the flow of liquid into cylinder t3 and allow compartment 82 and chamber '93 are in com-l spring 12 to accelerate the closure of valve S5. 20 munication, expulsion of liquid therefrom upon However, flow of liquid Írcm'the impelling liquid the pressure stroke is prevented by the operation compartment into housing »6l through orifice 62 of ball-check valve IUI. However under condi upon the pressure stroke is prevented by check tions of suction, introduction of liquid from valve T8. Therefore upon a pressure stroke no liquid chamber 88 into liquid chamber 812 through liquid or pressure in chamber iii is lost Áby virtue of the opening of valve 65. However upon the .\ valve 9i is permitted. The cycle of operation and introduction of start of the following suctionstroke, liquid is liquid into the impelling liquid compartment .is drawn from liquid chamber 5| through conduit the same as has been previously explained in 'Il into housing 6i and from there, through connection with Figure l. oriñce A62, into the impelling liquid compartment n I claim: within-chamber l0. l. In a pump having a chamber and a dia If liquid drawn in during the period when phragm within said chamber and dividing the valve 65 is open balances the liquid being lost same into an impelling liquid compartment and from the impelling liquid compartment, the oper a pumping compartment, inlet and outlet valves ation is in equilibrium and the position of the di.. permitting the inflow and outñow of liquid from aphragm at the end of the succeeding suction said pumping compartment upon movement of` stroke remains Stabilized. If Valve 55 closes too said diaphragm, a liquid holding chamber, valve quickly to admit liquid to balance this loss the means adapted to function in response to the ac diaphragm 3i] expands and increases the range tion of the diaphragm to allow 0r prevent com of movement of piston 67 thereby causing the munication between said impelling liquid com period during which valve `65 remains open to partment and said liquid holding chamber, said be extended and in turn causing more liquid to be drawn in through valve 18. This progressive valve means including means adapted to retard the closure of the valve through an interval of time dependent in duration on the volume of liq expansion of diaphragm 30 will cease when the liquid drawn in balances »the liquid loss. In rare cases liquid may enter through valve ’I8 during the period when valve 61 is open as diaphragm 30 approaches the end of the suction stroke. Under most conditions pressure exists in the im pelling liquid compartment during this period and all passage of liquid through oriñce 52 will occur following the succeeding pressure stroke. In the modiñcation of my invention illustrated in Figure 4, the tubular diaphragm 39 of Figure 1 is replaced Iby a simple ñexible sheet-like dia phragm 8l. Impelling liquid compartment 82 is suitably connected to a reciprocating piston ar rangement, not shown, by conduit 83. Opera tion of the impelling liquid within compartment 82 operates diaphragm 8l in much the same manner as the operation of diaphragm St as has heretofore been explained. Pulsation of di aphragm 8l creates alternate pressure and suc tion within impelled liquid or pumping compart ment 84 thereby causing the entry of material through poppet valve 85 upon a suction stroke and expulsion of material through poppet valve 86 upon a pressure stroke. Escape .of air or liquid through orifice 6l and into liquid chamber 4.3 uid in the impelling liquid compartment. 2. In a diaphragm pump wherein the dia phragm is adapted t0 move in response to the ac tion of impelling liquid in contact therewith, a chamber adapted to act as a source of impelling liquid but spaced from the impelling liquid in con tact with said diaphragm, a valve responsive to the position of said diaphragm to permit or pre ventV communication between said chamber and said impelling liquid in contact with said dia phragm, and means adapted to retard the closure of said valve through an interval of time depend ent upon the position of the diaphragm at the conclusion of its suction stroke. f 3. In a diaphragm pump wherein a diaphragm dividing an enclosed space into a pumping com partment and an impelling liquid compartment is adapted to move in response to the action of impelling liquid in said impelling liquid compart ment; a chamber adapted to act as a source ofY impelling liquid and spaced from the impelling liquid compartment, valve means responsive to the position of said diaphragm and adapted to open and close a passage between said chamber and said impelling liquid compartment, and 88 is identical to the escape of the same through 70 means adapted to retard the closure of said pas oriiice 45 as pointed out .in connection with sage through an interval of time dependent on Figure l. However the device permitting the introduc tion of compensating liquid to the impelling liquid 'in compartment 82 from liquid chamber the position of the diaphragm at the conclusion of its suction stroke. ' 4. 1n a diaphragm pump wherein a diaphragm dividing >an `enclosed space into a pumping com--> 2,405,734 7 partment and an impelling liquid compartment is adapted to move in response to the action of im- ' pelling liquid in said impelling liquid-compari',-> ment; a chamber adapted to act as an interme diate source of impelling liquid, a passage leading from said chamber to an exterior source of-sup adapted to move in response to the action of the impelling liquid in said impelling liquid compart ment, a chamber adapted to act as intermediate source of impelling liquid, apassage leading from said chamber to an exterior source of supply of impelling liquid, a valve adapted to close said passage under the influence of pressure in said ply of impelling liquid, a valve adapted to close chamber and to open it under the influence of said passage under the iniluence of pressure'in suction therein, a second passage communicating said chamber and to open said passage under the influence of suction therein, a passage communi 10 said chamber with said impelling liquid compart ment, valve means responsive to the position of cating said chamber with said impelling liquid said diaphragm andA adapted to open and close compartment, and means responsive to the po said second passage comprising a compartment of sition of said diaphragm adapted to open and close variable space, a member adapted to contract said passage. 5. In a diaphragm pump wherein a diaphragm 15 said space in response to an action of the dia phragm, means adapted to exert a force against dividing an enclosed space into a pumping com partment and an impelling liquid compartment is , said member tending to expand said space, a valve adapted'to maintain a controlled position in rela adapted to move in response to the action of im tion to the position of said member and to open pelling liquid in said impelling liquid compart ment, a chamber adapted to act as an interme 20 said passage on the contraction of said space and to close it on the expansion, of said space, and diate source of impelling liquid, a passage lead means adapted to control the rate of expansion of ing from said chamber to an exterior source of said space. , supply of impelling liquid, a valve adapted to close 9. A diaphragm pump embracing an enclosed said passage under the influence of pressure in space divided by a diaphragm into a pumping said chamber and to open it'under the influence 25 compartment and an impelling liquid compart of suction therein, a passage communicating said ment, an intermediate compartment separatingY .chamber with said impelling liquid compartment, the impelling Yliquid compartment from a source valve means responsive to the position of said of liquid supply, a passage leading from said diaphragm and adapted to open and close said source into said intermediate compartment, a passage, said valve means including a cylinder en 30 valve in said passage adapted to admit liquid into closed at one end, a piston in said cylinder, means and to close against the flow of liquid out of said adapted to cause a movement of said piston in compartment, a passage leading from said inter-l said cylinder in response to an action of the dia mediate> compartment into said impelling liquid phragm, means adapted to establish a force compartment, a valve adapted to open and close against said piston in the opposite direction to 35 said passage, means adapted to open- said valve said movement, a valve adapted to maintain a in response to an action of the diaphragm, and position in controlled relation to the position of means adapted to close said valve. said piston and to close said passage between said l0, A diaphragm pump embracing an enclosed chamber and said impelling liquid compartment space divided by a diaphragm into a pumpingin response to movement of said piston under the 40 compartment and an impelling liquid compart influence of said force, and means adapted to con ment, an intermediate compartment separating trol the movement of the piston due to said force the impelling liquid compartment from a source including an oriñce adapted to admit liquid into of liquid supply, a passage leading from said said cylinder. " source into- said intermediate compartment, a 6. In` a diaphragm pump wherein the dia 4:3 valve in said passage adapted to admit liquid into phragm is adapted to move in response to the ac and to close against the flow of liquid out of said tion of impelling liquid in contact therewith, a compartment, a passage leading from said inter» chamber adapted to act as a source of impelling mediate compartment into said impelling liquid liquid and spaced from the impelling liquid in compartment, a valve adapted to open and close contact with said diaphragm, valve means respon said passage, means adapted to open said valve in sive to the position of said diaphragm to permit >communication between said chamber and the impelling liquid in contact with said diaphragm, whereby the opening of said valve is controlled by the movement of said diaphragm and the closure of said valve is controlled by the metering of liq uid into a ñuid chamber associated with said valve means. ' 7. In a pump, a compartment, a tubular dia response to an action of the diaphragm, means adapted to close said valve, and means adapted to retard the closure of said valve, said means in cluding a. chamber, a passage communicating said chamber with a body of liquid in the pump and means adapted to vary the volume of the space enclosed in said chamber in response to an action of the diaphragm. Y Vll. A diaphragm pump embracing an enclosed phragm adapted to be mounted in said compart 60 space divided by a diaphragm into a pumping ment and to divide the same into an inside pump compartment and an impelling liquid _compart-V ing compartment and an outside impelling liquid ment, a passage leading from said impelling liquid compartment, an auxiliary supply chamber, valve compartment to a point exterior to the pump andv means adapted to permit or prevent the flow of adapted for the expulsion of fluid from the pump,v liquid from said auxiliary chamber to said im 65 an intermediate compartment separating the im pelling liquid compartment and from said im pelling liquid compartment from a source of liquid pelling liquid compartment tc 'said supply cham supply, a passage leading from said source into ber, the opening of said valve means being con said intermediate compartment, a valve in said trolled by the position of said diaphragm at the passage adapted to admit liquid into and to closey end of its suction stroke and closure of said valve against the flow of liquid out of said compart means being controlled by metering of liquid into ment, a passage leading from said intermediate a fluid chamber associated with said valve means. compartment into said impelling liquid compart 8. In a diaphragm pump wherein a diaphragm ment, a valve adapted to open and close said pas-f. dividing an enclosed space into a pumping com partment and an impelling liquid Vcompartment is 75 sage, meansV adapted to open said valve in response,v 2,405,734 10 to an action of the diaphragm, and means adapted to close said valve. 12. A diaphragm pump embracing an enclosed partment, said diaphragm being adapted to pul space divided by a diaphragm into a pumping liquid in said impelling liquid compartment and compartment and an impelling liquid compart ment, a passage leading from said impelling liquid to cause successive periods of change in the vol ume of said pumping compartment; means compartment to a point exterior to the pump and adapted for the expulsion of fluid from the pump, an intermediate compartment separating the im pelling liquid compartment from a source of liquid supply, a passage leading from said source into said intermediate compartment, a valve in said passage adapted to admit liquid into and to close pelling liquid compartment and a pumping com sate in response to a reciprocating movement of adapted to admit liquid into said impelling liquid compartment, means adapted to function in re sponse to an action of the diaphragm and to cause said ñrst named means to admit said liquid, and means adapted to control the volume of liquid admitted by said first named means, said means being adapted to function in accordance with the against the flow of liquid out of said >compart ment, a passage leading from said intermediate position occupied by the diaphragm at the ter compartment into said impelling liquid compart the pumping compartment. ment, a valve adapted to open and close said pas sage, means adapted to open said valve in re sponse to an action of the diaphragm, means pumping chamber, an impelling liquidr chamber, mination of a period of change in the volume of 14. In a diaphragm pump incorporating a and a diaphragm forming a dividing Wall between adapted to close said valve, and means adapted to 20 said chambers, an intermediate chamber between retard the closure of said valve, said means in the impelling liquid chamber and a source of cluding a chamber, a passage .communicating said liquid supply, and means adapted to operate in chamber With a body of liquid in the pump »and response to the action of the diaphragm and to means adapted to vary the volume of the space cause the transfer of liquid from the intermediate enclosed in said chamber in response to an action 25 chamber into the impelling liquid chamber and of the diaphragm. ' from the source of supply into the intermediate 13. In a pump characterized by a chamber and chamber. a diaphragm dividing said chamber into an im HARRISON S. COE.