CA1066240A - Valve - Google Patents

Abstract

ABSTRACT:

A valve intended to open in response to a pressure difference between the in-terior of the valve and the exterior thereof comprises a diaphragm which in its closing position is conical. The diaphragm has an opening which is normally closed by means of a valve stem. Arrangements are made to prevent communication between the interior of the valve and the exterior thereof until said dia-phragm has been deformed to a substantially planar shape.

Description

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Tl7i~ ~e a divl~iorlal appllc~t~Qn ot Patent Applicatlen SeriPl NunbeP 223~757 by 13illy Nilsun~ ~lled April 3~ 1975~ ea~itled~
tlVALVE~o lhl~ inV~Q~iOn reP~s to a vslue inten~6d to be opera~iva bot~esn a rir3t and ~ ~cond 9p~1ClE~ hor~y or~e o~' ~ld speces may b~
the Op81'1 sir~ and haa the ability to up~a in ~esyGnse to a prea3u~
~erenoe bst~a~n 813id epace~ n~d, ~s this 0nd~ ha~ a di~phr~lgm~ ~hloh in th~ ~3orlRal 013~ing po~ition th~reo~ ie ao~hat 6WlliC~Il and do~n~ardly eleping toward~ th~ oa~tr~ said diaphr~lg~ h~ing an ope~ g ~hlch i~
nor~elly k~pt olosed by a po~t~ or the lllte9 Jl ped aql la vatlve eteal~.
Wb~n a valve ot l;hi8 typlE1 i8 oonn~otad for ~x~ple ta a tU~ oont~iQin9 ~ ~luid ~d th~ interior o~ tha tube de~ines o~e ot the ~pa~e~ ~ationsd iEI tha proa~ble an~ ths op~n 9il` ds~iRe3 th~ seo~rld ~pac~ the valve will ~OEII~ a sd~-s;:ls0:Lng C108U~E~ tor the ~uboO By : .
~nudly ~qu~szing ff~ ~ùbe~ the pr~ura require~ Por ope~ng tha ualva ~ be g~n~r2ted u~d it is ~mdar~tood th~t ths3 oo~0~t ~1' th~ tubo : .
~11 thereby b~ d~schsrgad thr~ h tha v~ op~ning~ l~hon the pre&8Uæe7 ex~æt~d upon t.ha ~lul~ c~nt~n~d la ttls ~ube i~ rsl~ d, t~ disphr~gn ret~rF~ to th~ origin~ po~ltion ~beEsof by ~nG of lt~ tl3xibllity and therellby~ th~ vflllv9 openlng 18 cle~ed. :-In or~r to d~r~r~ the di~phr~ ro~ th~ abov0~entioned : .
orlgirl~ pooition in whlch th~ dl~phr~g~ ~ngle 018y be oell~d n~3~tlve to ~ pls~r o~ ~lst poel~lon~, lt i~ neo~sary thl~ a rele~iv~l~ lar3æ ~::
toroa ~B ~ppll~d to the diaphr~ , Whon ~he d~phrag~ rs~l~h~ he pl~n~r pooition (z~o 4agls) ~nd ~o~tinu0~ to~2~ pooi1;1v0 æagl~ ~nd th~
expoairl3 oS' the vd.v~l opening hso begun~ the cun~6nt o1' the tub~ h~s . ~ .
1~ high pr~ss8ure at th0 811U~ 8 th8 v~lve oponing i8 ~ Iry ~la~
A ~es~lt ther~r la th~t ~b~ dloch~r3~ ocours r~h~ like ~ 90 and th~ ~uec~esiv~ly lncre~aino v~lvo t3p81~ g ¢o~bîned with a so~ewh~t reduced preeaure ns a 001182qUellOel h~r~y re3ult~ in ~ spu~t end un~sntroll~d disch~rgs. Fbr this re~on, alves ol' th~ ~rore~arltioned type h~s/s only found li~ited use. :

, ,, . . , , . ' ' Thus, the objoot o~ the inv0~ti~n is pri~rily to ali~iaEItl3 th2su dra~backs 3n~ to prov~de a ~i~pl~ Qad ~'Plcl~n~ v~ a that ~ay be utilizsd Por ~ n~b3r ot application~ st~cb ~a a sal~
closing clo~slre~ A ~afety vsl~ a cor~trol valv~ eto.
To acco~pli~h th~a~ and ~tho~ ob~ots~ th~ ventioFI has the charact~ri~tics ~isdo~d in th~ 1~ollo~ing Gl~
In tb~ accoolpan~i~g drawin~s7 thr~e ex~plitrillg ~bodi~sts o~ the inY~tia~l ar~ t~at~d.
Figur~ a 91!1i~iQI) through a ~r~l~ a~bo~ nt oP th~
~ nvsntlo~
figure 2 i~ a seotioE~ ~h~ou~h ~ oacond ~b~di~n4 and Figur~ ~1 ia a a~c~lo~ tbPo~g~ ~ thlrd eebod~0Rt in the ~hap~ o~ ~ 8~1t`0t~ UI~lV
ll~o~rdlng ~ th~ lnv0~tio~ ~t~ps ~re l~ak~ to pr0v~Mt ;
oo~un~c~tian bat~a~ he t~o 8p&U:lEU3 b~t~0ea ~bloh tb~ v~lva 1~ ~ounted tb~ po~tio~ h l;h~ diaphr~g~ i8 in tbo r~ p~ lon thsreo~ ~n~ga~s ~ ) un~il th~ ~a ba~ been derl~oted to a a~b~t~ntlally plzr~ar o~ndiltiD~ (ze~ ~ngla) ~bsn th~ v~lve op~
iR th~l ~bodi~t at~ figtlre 1~ gh18 io ~oocap1i~hed ~ .
by :~las~ o~ a part~ whil~ bodi~ accord~g to : :
Fig~e~ 2 snd 5~ ~his i~ ~oh1~e~ by ~sk1ng the ~lue po8~ IOVI!IblQ~
Ttlo valv~ Illua~r~t~d 1n Fi~ura 1 oo~pri~a~ a fir~ ~ber h~Ylng 'cho g~n-r~l ra~0rence nu~lar~ nd a ao~ond IR0~b~3r with l;he :
gsn~r~ ra~rsnce r~ ora1 2" In 'cha ~bodl~nt aho~n~ w~er 1 oo~priaes ann~lar pu~c~o~ 3 ~h~ch ha~ a p~ripb2rd out~rd1y dir001:0~ f1ang~, :
or be~d 4~ in the upper p~rt 'ch~root. Th~ ann~laP portion 3 oo~ usliosta~
~th ~ o~trol botts~ paPt 6~ pre1'`ar~bly by ~0~n~ o1? thr0~ rib~ or ~poko~ 5~ ~h0 rirst ~b0~ h~o ~ Dtflllll po~tion ino1~Jdlng ~n annu1a~
rlange 7 ~ l aa ~ po~3t 8 proJ~ctlng frow ~ald o~tltral botto~ p~rt 3~ ~nd tho po~ ultably ha~ ~ber 9 of redu¢~d di~Rstor.
5~il~1y, th~ s~cond ~bor 2 of' tho v~lv~ h~ ~n ~naul~
portion 10 prov1d~d ~lth an intsrn~l g;row0 11 into ~hich th~ out~rdly ' , ' ;2~e~
direoted tlsng~ part, or be~d 4~ of th~ ~in m~ber 1 may ~nRp. A
'6hln~ d disc~hap~d part 12~ actlrlg as a di~phr~ proJ00t sald an~lular portion aad said ~iaphragm ~ont~nues in th~ ceF~ral p~t~on th~re~t in~o 8 ~le~ve 137 the low~ porti~n oP ~hich being subetantially cylindrio~l ~n~ 3~alingly ~urrDundiag the a~nul~r flang~
7 of m~aber 1- 7he slsav~ h~l8 an upp0r and wall 14 pro~id~d blith 4 di~ob~rg~ cp~n~ag 15 wbich~ as ~sy b~ ~ in Flgo 1; no~ally i~
kçpt c~ver~d by the erld portion 9 o~ the post.
Th~ t~ a~bers u~ the v~l~e ~oording to the e~bodi~ant 10 ~ho~n ~ay be 0~ o~ a ~Ed'c~b1~ thor~p1~o~io ~at~rial by an ln~etion noulding prQo~ snd thu~ ~ay be ~abrioa~sd to a lo~ co31; at the 118111e 18 ths d~ai~d e1EI~ti~3ity eharaoteris~io3 are ~ohi~vsd. In a ~nner not disc10s~d~ ths va1ve is conn~ot~d t~ ~ tube 16" or tha 1ike.
Whea a p~s~ure is appli~d t~9 the oont~ o~ the t~Jbe~ ~aid oonte~t will bo pr~ssed i~to tha ~p~Ge la through the opaning8 17 ~ .
bet~2an th~ spokas ~nd~ as ~ resu1t th~r~o~ tb0 c~nt~al portion o~
tha di~pb~g~ 12 ~ill b~ d1sp1ao~d in tha dir~otioa o~t~rdly ~rom th~ tubs~ Upu~ thls d1sp1~oQE~isnt~ the ~ o op~ning w111 b~
succossiv~ posed bu~ pr~esuriz~ ODntsnt of the tube i~ by ~eans 20 of the oo-operstl~g ~l~age 7 ~d ~l~av~ 13 preve~t~d ~u~ r~Æ~blng the ap~ws lg. ~o~e~er, wh~ tho lobl~r portion nP eleGve 13 paso~s th~ :
upper ~dg~ of th~ enn~r flange 7~ th~ p~s~l~rizo~ rlu~d 1~1 spaea 18 ~ay t'lo~ lnto op~ce 19. H~ever~ ~h~n this ooc~r~ ope~ing 15 io totally oloar o~ th~ post 8 ~nd the ~scha~e o1' the ~luid there~o~e oooura at a relakivelr loq~ ~p00d ~nd with a sub~turltl~lly CoQ0~t op~ning ~ea~ Aa a r~ult th~3roo~ ven end corltroll~d t1ow ot ~te~id th~owgh ~0 Yalve ~3pqlllit~9 15 t~kes p1oQe~ A~
tion~d~ a ~bstant1al1y si~ r efP~ot ~y b0 obt-1ns~ for ~x~np1e by th~ ~10sur~ shown in Figa 2~ hioh basioal1y hal~ th~ ~s~e 30 ~tr~cture a~ the e10~ur~ d~sor1bed above~ ~1th ~hs except~on~
01so10sed be10~. me p~rts cf the o10~wra bo~ng ~re or 1-8B

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i~entical with tbe corr~pondiag parts ot th~ closure shown in ~i9~ 1 ar0 thu8 not expla~rlad~, The clo~ure aoo~r~ing ta Fig. 2 thus lacks the an~ular ~l~ng~ 7 and the xib3 S~ ~r~ relatiudy thin and ccn~equsntly ~ xibl~ in eontr~d~etlnction to th~ ribs nr spoka4 5 ln Fig. 1.
In thG Flo~asse~blsd ~d unt~nslonsd condition o~ th~ :
closL~re, th~ spokes ten~ to oco~py th~ positioa ~hows~ in dott~d lin~
lr~ Fig. 2 tllod lt ic ulldor~tood that, oDn~4u~ntly~ th~ spl~ko~ ar~ ;~
pr~t~n~ioned in the ~s~bl~d oo~ditian ot I;ha ~losl~o. SiQil~rly to tba e~nbodi~enb in Fig. 1" 1;he diaphr~ pa~t 12 i9 p~ n~io~d ill i1;8 ~o~nte~ condi~ o that it sag~ge~ ~hY pos~ B5, 9 by ooPta1Q prsse~r~ in order ~o ~ns~rs a 91~CUX13 ~ 19 ~ctlon.
pr~t~n~ion of the diaphr~s~ part i8 ~uPficie~lt that th~3 ribs 5 ~ill t~ke tho p~ioa ~ho~ Pwll lina ir~ Fig~ 2.
Wh~n the ccnt~n~ oP th~ ~ubs lo oxpQs~d to a pra3surs, thu dl~phr~gla 12 ~ill b~ suco~sil/~ly flstt~n0d cut to~ard~ a pla~lar : -pos~ti~n tro~ its origirl31 positlon bllth z s~g~tive a~gl0 Qnd ~11 thar~tt~ oooupy ~ pos~ti~s angl~. ~y th~ p~t~sionl~g o~
spok~o thay tend t~ oc~upy th~ po~itien iholon i~ dott~d lia~3e9 ~h:lch ~s~ ths~ th~y durlrJg tho Sirs~ of th~ mov~lat of ~h~ di~pbrag~
1'ollow tbe dl~phrag~ Thuo~ th~ post wil~ not leav~ i~s grip wlth the openi~g 15 durlng thi- tir~t d~tor~tion ~f tbs diaphr~ 0 The pro-t0neioning and di~ensionln~ ~r~ h~r~by 80 a01~oted ~h~t th0 spokee 5t r~ach their ~nlo~d~ po~itiona~ ~hown in d~ eo wbot~n~ially Illhon th0 dlaphr~go p~soee th~ z~Po angl~ 1.H~ ~hsa th~ diaph~4g~ i8 ~ubot~n~i~lly rl~t. When p8U!li519 th1e anQle,~ th~ d0for~ation ot th0 di~phcag~ ooour~ at ~ rel~tiv~y lo~ pressure ~d raoidly up to or~ up~u:~ly bant po~it;ion ~lth a positivo angl0 ~r th~ di~phr~g~ u~d thi0 l~ads to a rapld expo3ure o~' th~ Dpas~in~ 15. It ls o~vioue th~t by th~ w~e oP ~ d~vic~ na~

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de9crib0d~ it; i8 not pos~ibls t~ ~bta~n l~uoh ~ g~lltlo ~nd ~qual di~
cha~ge flow ~8 i~ ~de posslbl~ wi~h th~ 6~bodi~ent ~ccor~ing to flg~
1~ but experi~sRts have ~bo~n th~t tho i~provs~ent o~ th~ ~low ch~racteristics co~par0d with known V~lVe8 ot this typ~ i8 consid~rable~
an~9 iQ ~o~t c~s~ lly s~lci~t~
A third possibility to realiz0 th~ ~b~oot o~ the iRVentiOn ~8 the val~ str w ~ according to Fi~. 3. I~ t~is 0~3e~ t~e valve i~
i~tendsd to oon~tlt~te a ~tety ~alvs and co~p~l~e~ ~our ~e~ber8 g~or~lly d~signatsd 1~ 2~ m 3~ ~d ln4~ pr~rably ~11 o~ ~h~
1~ b~lng ~ade ~ro~ a ~etsl.
The P~rst ~s~ber 101 ie a ~upport ~nd ha~ a ooa~0ctlo~ piec0 105~ pre~erably pro~ided ~ith threada os~ the like, pro,~set~ng ~om ;
a bt3tten~ 106 ar~ p~ rdly ~ireot~d f'l~nge port~n 11~7 tormils~ a~
outer r~ al~o proJ~ots thers1?ro~. Fl~gl3 portiws lE17 ha~ ~n 0xternal ~hrosdlng 10~ and th0 ~pp~r ~dge portlon lQ9 th0r~0P l8 obl~que. Th0 bo~m 106 i8 per~or~ed by ~ r o~ obllqae b~r~B ll~o Th~l eecend ~:
me~b~r 102 ceillpri8l33 Ul anne31ar ~oo~ portlors 111~ ~hicb Go~inu~s iato - :
el ~o~n~rdl~ dir~gte~ ngs 112~ ha~ing an i~t~ra~l thr- ding llS to ~ngsge tha threading lOB ot th~ ~ir~ bl3r 101. Ibe tt~ bar ln3r 2n cO~pri~ di~phrag3ll~ io as alay be so~ Fig~, 3~ o1' oonioal ~h4pn in its inltial pooition ~ith a aeg~'ciue ~n~10 ~nd ttl~ inclinod a~yla in r~lstion to th~ borizoa~al pl~s~ ollb~n~ally corre~pond~ ~o the :
atiDn of tbe obllqu~ ~dy~ portiun lU9. Th~ c~rltr~l p~r~ 114 o1' th~ diaphr~p 18 prer~ræbly th~oka~lfld to ~or~ the lip o~ op~ni~g 115" ~9 pe~ph~ry oi' th0 diaphr~ 103 i~ r~at~ d bo~ th3 :
~pp~r ~dgo porti~n lC9 ot 'che outer rillR 107 aad th~ ~nul~r roo1' portlon 111 lsa~ g ~ nexibl~ body port~o~ ~xteadlr~g iaw~rdly. The rs 101 ~d 103 foro ~ ~al~ity ln tb~ v~lwO
Th~ rourth ~e~ber 104 ot th~ vdvo ~noltJd~s a pro~octio~ ::
havitlg ~n e~d porélon 116 ~hioh i~ v~d in tbe oponing 115 ot th~ ~

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~laphragm 103 in the cJo~ed puRitien o~ tha ~ V1~17 ~B8 ill~8trQtl3d in Flg. 3. ~ w th~ ~nd portion 116 o~ v~lve ~ r 104 i~ d~ Qd aa ~bu~ent porti~n 117 ~hi~h angQgo3 the lower cide o~ the ~dgs~s oS`
~ha opening llS o~ the ~iaphr~g~ 1~3 i~9 th~ pOsi~Qn illastrat~d in Fig~ 3. As ~ar b~ ~en in FigO 3, the~ up~er op6nlngs o~ ~h~ obliqu~ly po~itioned hole~ 110 ~re p~rtiLally co~ered br th~ lo~sr 0a1r~ 91~ ef' ~ .
th~ abu~ant po~ti~n 117~ ~ha~ the ~J~lve io clo~e~O Further~ ~he ~ve ~nbor 104 has ~ v~lv~ st~ 2~nnill~ thwtlgh a s~nt~
openi~sl 119~ nad0 ~r thls purpo~e~ in th~ ho~tc~ o~ the ~upport ~bor 101. ~e ~ree ~d o1' ~ ~alve s~n 118 n~y b~ 1:hPead~d 8e t~t ~ . -.
8top ~e~a 120~ suGh ~8 ~I RlUt an~ loGkin~ ~aut9 a~ay be attu:h~d to tho ma at ~ daoi~0d hdQht l~val.
Whsn thc a~1'ety v~lve E~ OdilUallt i8 utili~e~ euch aa ln a cors~in~ or pr~ssuri2ed s~lr~ th~ pre~eure tænd~ to d~leot gh~ dia_ -phrag~ 1~3~ oae~ th~ praesur0 ~t ~hl~h the ~lve opene ~a ox~eded~ th~ diaphr~ deneotsd to ~uo~ ext~r~'c th~t th~
di~pbragm ~OY00 ~raR~ the p~sit~an shobJn i~ Fig., 5 deti~iag R nog~tive ~ln Sir~ bsoo~ g subsl;anti~r planar Qn~ ttlB~I ~ontinl3~n~ i~to 8 p~8it:iU~ angle. D~ri~ thls ~o~m~t tn 'ch~ 2ero po~itloa~
213 pltl~ar pos~tion of th~ dl~phr~ th6~ VellV8 ~bær 104 h~ b~aF~ rri3d ~loa9 ~ith th~ d~Qphræg~ h ~o~n~ th~t th~ valu~ ~0~ ~I?Dt 5p Tbe p~lti~ ot tho stop II~JD 120 i~ thor9r~re 85~ :~
~olo~t~d tb~t it wl~,l ~g~ge the ~otto~ of ~h~ Gen~otlon pl~O~D 103 wh~n ths dlcphrag~ r~ohes the ~ub~atantilally pl~nQr po~1tion~ ~y the ooatinu~d daforwation a~ th0 body psrtio~ oP the d~aphr~g~ 10 ~hich~ in ths vlcinlty ot th~ pl3n~r positio~ oocurs rapldly and with lo~ reelstonoe~ th0 opening 115 ot the dl~phr~9~ ~111 be dis~Rgaged rrom tha pro~00~ion 116 and a prs~eure reduotion ln tho u~lva cavl~y ~kea placo. ~y the dis~n~e~n~ af the opsning 1159 J0 the disoharge ~ill becoma gr~t~ aincs the d~ ction o~ the diaphrQg~
bsyond the plenar po~ition ooourD r~pidly~ a~ d~soribed. Upoa th~

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rapid pr~s~ure r3duotion in ~h~3 v~u0 cavit~ tha vsl~le m~b~r 1a4 t~nds te bs pr~s3ad ~o~n~ardly to it8 initial positio~a~ thu~ ~lvln~
~ aximu~ disohE~rge opening 115. Whan the pres~ure h~s re~ch~
a prsdetermined lo~ ualu~ th~ dl~phrag~3 ~gain r~tl~rns to ilt8 laitial pO8i1;iOrl~ thereby olosing the valve-It ha~ b~en ub~ervad that ~lo spet:i~l ea~ling ~n~~ra r~quirod i~ th~ ualv~ str~c~s~re~ which~, n~tu~lly~ 19ald5 ~CO
a con~idersble ~dvant~g~ ia i~R~alf. In ord~ to obtslR a ba1'fling~
3tlch a~ a noiee b~f~ling~ o~ th~ gas or ~luidetr~ s~plng rrOo 10 th~ cpeQin~ ~ s~table do~laoti3n ~n~ may ~e provid~d ia ~r~r~t Or the ~peni~ig~ to tor~e ~h~ ~tre~DI oP i8~119 ~luid to revYr~
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Claims (3)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED,ARE DEFINED AS FOLLOWS:

1. A valve opening in response to a predetermined pressure and closing upon release of said pressure comprising:
an integral diaphragm mounted at its periphery and having a discharge opening therein;
stem means extending toward said opening, said stem means including a projection and a support for said projection, said support having an outer rim and being provided with apertures between the outer rim and the projection, annular flange formed on said support and in engagement with said diaphragm to isolate said discharge opening from said support apertures when said valve is in the closed position, said diaphragm having a flexible body portion inclined inwardly from its periphery toward said stem means when the valve is in its closed position and moving outwardly through a planar position in response to pressure thereon in the direction of discharge; and said flange coming out of engagement with said diaphragm upon movement of the diaphragm through its planar position.

2. A valve as claimed in claim 1, wherein said diaphragm includes an upright sleeve connected at the center of said body portion of the diaphragm, said discharge opening being formed at the top of said sleeve, and said annular flange being in sealing engagement with said sleeve when said valve is in the closed position.

3. The valve of claim 1 or 2, wherein said stem means is unbiased.