US1681620A - Strainer - Google Patents

Description

Aug. 21, 1928. 1,681,620

A. W. MORSE ET AL STRAINER Filed July so, 192'? 2 Sheets-Sheet 1 Alberf W Morse \J' Wa/fe'rE kl ollheim INVENTORS BY Ma f mzm ATTORNEY Aug. 21, 1928. 1,681,620

A. w. MORSE ET AL STRAINER Filed July 30, 1927 2 Sheets-Sheet 2 23 Z 6 F Z5 1-: A/berf W Morse 5/ Wa/fer E. Wall/veim IN V EN TORS- ATTORNEY Patented Aug. 21, 1928.

PATE

ALBERT W; MORSE AND WNIAT ERE. WOLLHEIM, OF NEW YORK, N. Y. SAID WOLLHEIM:

assienon 'ro 'rnn anrr nonn COMPANY,

application; fi ed: July 30,

This invention relates to strainers for liquids and is particularly adapted for use in fuel oil systems.

It is one of the objects, of the invention to provide a structure for i a' strainer of this kind with'aduplicate set of strainer screens for the arresting of.dirt orpother foreign particles in the liquid; andis' equipped with means by which oneiof the strainer screens may be cut out for cleaning or; repairing without interrupting: the flow; of? the liquid through the other screen: Another object is to provide in a structure of' this kind a single air or'steam blow out connection which in combination with the peculiar construction of the cut-out means admits the air, steam or other-purging medium to clean or blow out that-particular strainer screen only which is not in use. Astill further object "is to malre the operation: of" the out-out means verysimple. and by its direction of its handling mechanismindicate which: of the two strainer screens is in use. Still other objects will become apparent in the following specification and the accompanying drawings forminga part thereof.

In the drawings,

Fig. l is a vertical sectional View through the strainer structure showing a preferred embodiment of the'invention; f

Fig.2 is a horizontalsectional View, a the plane of line 2+2 wiin Fig. 1 ;v t

Fig. 3 is a horizontal sectional view alongthe plane line 33 in Fig; 1; and- Fig. 4c is a vertical cross sectional view along the plane'of line 4: 4 in Fig. 3;

like characters of reference denote simi-' lar parts i throughout the several views and the following specification. 1

10* is a hollow casingfof' substantially obs longi shape; '11 is a bridgeit'wallextending across the upper part-'of l the inside of the casing 10 dividing the same 'into a lower or inlet chamber 12 and" anfuppe'r ori outlet chamber 13L Symmetric-ally (llSPOSeClL at eacli-side'of' the toppf the casinglO is a hollow cap-14 ,closedat itstop; projecting through the outlet chamber-13;and-being threaded into the wall 11' at 15, av shoulder 16' making a tight seat againstthe top ofthe casing. The vertical Wally'of the cap 14: between the" top o'f the ca' singiand its Wall 11- is protidedy with openings .17; The lower" a and 'of cap- 14 terminates in a long or tone ISLAND CITY, NEW YORK, A; con- STFQINEB;

1927; Serial No. 209,455;

cylindrical extension 18 somewhat smalle1 in itsouter diameter than thethreadedportion 15. 19 is a cup shapedstrainer basket made of perforated sheet metal or the like; having its open end fitted tight-y over the extensionlS. I r p v v Casing 10 is provided at its front with a cylindrical extension 20,- internally threaded at 21 for a pipe, in communication-g with: the "outlet chamber .13 by passages 22, 23 and 24e, Casing 10 is provided witha similar extension'25 at-its'back, similarly threaded at 2 6, thisextension beingin com municatio-n with the inlet chamber 12 by passages 27. 28 29- and f 31 is atapei'ing cut out key, rotatably fitted in the casing'lO, preferablyfcentrally between caps 1 L, between its top; wall111 and its bottomwall, 32is asolid ,wall extending across the central part of the key 31 about in line with'wall 11 ofthe casing-I 10. Theupper part of the key 31 between the top wallof: casing 10 and wall 1 1;has a substantially rectangular openingp33 into a hollow center 341.; This opening is of such width that it forinsa continuouspas] sage from opening 23-to opening 22, or from opening 24L to opening 22-; when a rotated revolution, Attention is particularly drawn to the factRthatjwhen openings 23; melee are in communicationthrough hollow; center ing 24, and vi'ce versa, when rotated A, rev; olution; wall 35- closesopemng 23; while;

openings 22 and 24s are registering, through the'hollo'w ceIIter SL, The lower part ofthe key 31' terminatesin; asolid endBGr fitted tightly in the; bottom wall} of -ithe casing 10,, A verticalcentral partition connects Wall V32witl1 end 36;,of the keyylil This partition is so disposed that it connects openingsl28 and29 whilecuttingput open ing 30 when tlieupper part of key3ll con nects openings ;22 &I1Cl;235}31l(lsimilarly; con nects'nopenings 28 and; 30 and cuts out open ing 29g1wlienrotatecl; A turn whil e its upkper part connects openings 22; and 2 1. 1 38 is an outwardly, projecting spindle of key 31having its terminal D -cshapd togreceivea conresponding ly shaped-socket ofga handle bar 39,.- Tliis bar; has a;dowmvardly projecting 1mg 40- adapted to; travel along ide the front of thecasin Ojin a *me'intal path tra 2 and is li nited lution by the ends 42 of the path 41 which is partially cut in the outer wall of casing 10. a2 is a bonnet over spindle 88 screwed into the top of casing 10 and is a stuffing box nut. 414 is a spring pressing against the top of the cut-out key 31 to cause its sides to fit tightly against their bearings in casing 10.

In the rear of the casing on top ofextension 25 is a boss 15 threaded to receive an elbow connection 4:6 and a valve 417. 48is a circumferential groove in part ofthe upper wall 35 in communication with boss 15' and connection 16 through an angula-rly disposed duct 49; as to register with opening 2% only when the same is cut off from registering with opening,

22 by wall 35, and sin'iilarly, when key 31 is rotated turn, groove e18 registers with opening 23. In both positions, however, groove 48 is in communication with elbow connection 46 through duct 419.

' 50 are clean-out plugs in the bottom wall of casing 10 below each of the strainer baskets 19. A similar plug 51 is provided below the cut-out key 31 for the purposeof facilitating the machining of the casing 10.

The operation of the strainer is as follows: hen the strainer is in the position shown in the drawings, oil or other liquid to be strained is admitted under pressure through a pipe screwed into extension 25, thence through duct 27 and opening 28, past wall 37 of the lower part of the key 31 and opening 29 into the lower or inlet chamber 12,- at the left side of casing 10. The oil then passes through the strainer basket 19 which being of very fine mesh causes any impurities or other foreign matter to accumulate around its outside. The clean oilris forced through the openings 17 in the'cap 14 into the upper or outlet chamber 13 at the left side of the casing and thence through opening 23 into the hollow uppercenter 34; of the, key 31, and thence through opening 22 into a pipe screwed'into extension 20. Openings 22 and 23 and openings 28 and 29 are of substantially the same area, as are also the pas-, sage for the oil through hollow center 3-1 and the space'alongside partition 37."'The passages in the upper part of the key 31 and openings '22 and 23 are wider and shorter than the passages in'the lower part of the key andopenings' 28 and-29 which are rela-' tively longer and narrower because of the tapering shape of the key and the importance of keeping these passages of a uniform area.

Attention is now particularly drawn to the fact that in the position indicated in the drawings and just now described, oil is ad mitted into the left" side of the casing and discharged therefrom by virtue of the cutout key 31 which deflects the flow of oil to and from that side of the casing, and that the handle bar 39 is so attached to the spin- This groove is so arranged and 30 at the right side of the casing adjacent the key 31 are cut out by, respectively,. walls 35 and 37. Opening24 is symmetrically disposed at the right side of key 31 to opening 23 and is of the same size and, similarly, opening 30 tov opening 29.

No oil therefore passes intotheright hand side of the casing and through the right hand strainer basket 19. The right hand I strainer can now be cleaned easily by admit ting steam through valve 47 (which is piped toa steam line), elbow connection 46, duct 49 and groove 4.8 into the inlet chamber 12 at the right hand sideof" the casing and through openings 17 into the insideof the stra-iner basket. Here it forces all foreign matter around the outside of the basket away from the screen and blows it out through the opening at the bottom from which the clean-out plug 50 has been removed. This blowing out can beachieved very efliciently, because thesteam is blown through the strainer mesh in a direction opposite to the normal flow of the oil whereby all sediment caked around the outside of the basket is ':very quickly loosened. The groove 18 does not communicate with the left hand side of the strainer; therefore steam does not enter that side and its functioning is not interfered with.

By giving the handle bar a turn to the right to the end of its travel as fixed by lug 10, the above described position and functioning is exactly reversed, and instead of the left hand strainer working and the right hand strainer being cutout, the right hand strainer is workingand the left hand strainer cutout. The handlebar 39 point ing toward the right side of the casing in dicates that the right hand strainer is functioning. In thisposition then, the left hand strainerbasket can be blown out exactly in the manner described before in reference to the right hand strainer basket. In other words, that strainer which is cutout of service can be cleaned by simply opening the single steam valve attached to the casing and permitting the. steam to blow out the impurities through an opening, at the bottom of-the'strainer. Itis impossible to admit steam into the working strainer, but the peculiar arrangement of steam passages permits only of cleaning that strainer which is cut out ofservice. WV-hile I have referred herein and inthe appended claims to the purging mediunr as being. steam, I do not want to be limited to steam only, but any other suitable purgingmedium, either liquid or aseous, such as air or water forinstance, may be employed equally as well, and the term steam is tobe interpreted broadly.

It is understood that various changes in the form, proportion and minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as de-' structure having an inlet, an "outlet and a st am connection, a pair ofstrainer s 'reens interposed. in passages'between the said inlet and outlet, and a key having means for alternatingly shutting oil one of the screens from the said inlet and outlet and admitting steam from the .aid steam connection. to that screen only which isshut otl and a blow-out connection for the steam, near the screen, to carryol'l accumulated sediment.

3. A strainer for liquids comprising a structure having an inlet, an outlet and a steam connection, a pair of strainer screens interposed in passages between the said inlet and outlet, and a key having walls and pas-. sages adapted to alternatingly shut oil one of the screens from the said inlet and outlet and to admit steam from the said steam connection to that screen only which is shut oil, and a blow-out connection for the steam, near the screen, to carry oli' accumulated sediment.

i. A strainer for liquids comprising a structure having an inlet, an outlet, and a steam connection, a pair of strainer screens interposed in passages between the said inletand outlet, a key having means for shutting off one of the screens from the said inlet and outlet and means for admitting steam from the said steam connection to that screen only which is shut oil, and a handle bar exterior of the said structure for operating thesaid key indicating by its direction that'strainer screen which is not shut oll V 5. A strainer for liquids comprising a structure having an inlet, an outlet and a steam connection, a pair of strainer screens interposed in passages between the said inlet and outlet, a key naving means for shutting ell one oil-he screens from the said inlet and outlet and means for admitting, steam from the said steam connection to that screen only which is shut oil, and a handle bar. exterior of the said structure for operating the said key having means forhmiting its travel, the

said key beingadapted to shut ol't one of the said strainer screens at one end of its travel and the other screen at the other end of its travel, the said handle bar indicating by its direction that strainer screen which is not ting off one of the baskets from the said inlet and outlet and means for admitting steam from the said steam connection to the inside of that strainer basket only which is shut oil, and a blow-out connection near this said basket.

In witness whereof we havehereunto set our hands. ALBERT V. MORSE. l VALTER E. lVOLLI-IEIM.

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