GB2410538A

GB2410538A - Lever operated pinch valve

Info

Publication number: GB2410538A
Application number: GB0423112A
Authority: GB
Inventors: Barrett Morley Musgrave Payne
Original assignee: PAYNE CAROLE ANN
Current assignee: PAYNE CAROLE ANN
Priority date: 2004-01-27
Filing date: 2004-10-18
Publication date: 2005-08-03
Anticipated expiration: 2024-10-18
Also published as: NZ537464A; GB0423112D0; WO2005071295A1; AU2005206584A1; GB2410538B

Abstract

A pinch valve comprises a flanged tubular valve body 19 into which is inserted a replaceable resiliently deformable sleeve 10. The sleeve 10 is secured in position by retaining rings 11 and compression seals 16 between flanges 20 and 36. A slot 17 is provided in the tubular body 19 which accommodates a sliding closing gate 14. A hand operated lever 25 rotates around pivot 28 to actuate the gate 14.

Description

HALF TURN LEVER OPERATED PINCH VALVE

This nvcnhon Is concerned vth valves known as pick salves being those Which are opened and closed by pmchng or relcasrng a rcsrhentl deformable sleeve The sleeN es are used In the control of abrasive and corrosive lands The slce,es are dscardcd vvhen om out allo\vnTg the N,ale to operate with repeated sleeve replacements In the nature of presently known hand operated pinch valves the opcmug and closing Is accornplshed by a threaded \alvc spmdlc rotated by a luand vhccl This rcqnres many hand wheel rotations and Is hone consuming It Is knovvn that most abrasive damage Is done to these slee,cs during tiers slow openmg and closing The prime oblect of this nvenhon Is to replace the slow hand \vheel operated pinch valve with a fast action half turn leNcr operated pmclT valve In order to acconplsh this a new type of pinch valve has been dcs eloped and Is described as follows A valve body fabricated from standard tubes and flanges of dl'ferent matenalsmuto which the sleeve Is Inserted and locked by retaining rings The closing action Is provided by a half turn lever operating through a pivot and fulcaum movement producing progressively rncreasmg closing forces mto the locked closed posrhon \vluch can only be disengaged by a reverse movement to the hand lever The locked closed position occurs hcn the fulcrum has been pushed by the lever to the very bottom of It's IX() degree arc of travel and shghtlN beyond the valve's center line to the fulcaum's offcenter stop position Tlus Is the closed position and the fulcrum Is locked In by the up thrust of the elastic resilience of the clamped shut sleeve Most Importantly the fulcrum movement thorough the bottom half of It's arc of travel produces high clarnpmg forces to pinch the sleeve shut against pipe line fluid pressures The reslentlv de-formable sleeve further provides elastic shock absorption areas m the clamped shut posher This shock dampening Is most Important as surge pressures and accornpanyng pipe hne hardener Is a product of the quick closing achorT. The resiliently de-formable sleeve further provides abutments w.,hclT are compressed Into static seals between Ganges when the valve IS bolted to opposing pipe hne flanges The quick acting lever operated closing assembly incorporates a double disc brake packed with sticky viscous grease to slow the valve's opening action The elastic and pressured sleeve snaps out of the valve's closed and locked positron when the hand lever Is pushed to the valve's open position It Is cssenhal to brake the lever whiplash The viscous grease also provides lubrrcahon to the pivot and fulcrum and pre\ ents Ingress of dirt.

Two alN es of true mvcnhon positioned side by side and with their closing assemblies back to back and their hand levers,ntcrconnected and flanges on one side Interconnected to a common mlet mill give lever selection of one of two pipe Ime outlets A gentle. safe dispersion selection by half turn hand lever Is acluevcd as both closmg gates smultancously open and close benefiting from a neutral pressure balanced mid position Fig I represents the cross section side vied' valve closed Fig 2 represents tote cross section end view valve closed Fig 3 represents the cross section of the body only side vied. \alvc open Fig 4, represents the cross section end vied. valve open Fig shows the cross section of the sleeve and retamung nags Fig 6 shows hvo N elves interconnected end vice. one open. one closed Fig 7 shoves two valves interconnected end vreNv, both half open in neuhra

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Fig. 1 shows the cross section of the side view of the valve In the fully closed position with the sleeve pinched shut and a pipe line flange bolted to one of the valve s flanges and the opposite valve flange Is open The cross section shoves the valve body 19 with the bracket IX and end flanges 20 acid cross section of the reslenIl; de-formable sleeve 10 secured In it s central position vvthn the Naive body 19 b-N the retamng rings 11 situated \\ Thin their valve body recess 15 with the sleeve 10 clumped shut producing elastic pressure absorplo', areas A and A The sleet e It) Is shown clamped shut at 23 beta een the bottom of the closing gate 14 and the bottom of the value boa; 19 producing an elastic up thrust force at 23 and a locked closed position of the off center located fulcrum at 2') The left side of v al\ e s cross section shows pipe hue Range 36 bolted to it s opposing valve flange 20 with the flexible abutment of the sleeve 1() compressed and contained mto a static fluid seal 16 within recess 15 The right side of the valve Is shown open and not bolted to a pipe Ime flange and therefore it shows the flexible sleeves abutment 13 protruding beyond the face of the flange 20 It shows the sleeve 1() secured In a central position by the retaining ring 11 which Is clipped Into the sleeve's moulded grooves 12 and further chpped Into the recess I 5 wtlun both valve flanges 2() It shoves the retuning rings 11 solidly backed up against the step 22 at both machined ends of the steel tube body 19 which In tune Is welded at 21 to the salve s Ganges 2t) The closmg gate 11 Is seen protruding through the crosswise slot 17 situated between slot 26 of bracket 18 The bracket 18 Is In cross section and shows the rmlled let) degree slot 31 containing the fulcrum 29 whuch Is locked In it s down thrust valve closed position The guide slot 26 reveals one of the thrust anus 30 which Is also In the down thrust position This view also shows the pivot 28 with It's grease dispersal channel 33 and the Inside of the containing disc 32 through slot 31 with the hand lever 25 attached on the far side Fig. 2 shows a cross section of the valve with sleeve 1() clamped shut between the rounded leading edge of (he closing gate 14 and the rounded bottom half of the valve body 19 The sleeve 10 Is pmched shut at 23 and has also been doubled m thickness at both folds 2 at each side of the closing gate The closing gate I Is fully extended to the valve's pinched shut position and it protrudes through the crosswise slot 17 situated between bucket 18 and guides 26 The sleeve's elastic pressure absorption areas A and A are shown and so Is the elastic up thrust at the sleeve's pinched shut position 23 The relation of both containing discs 32 to the thrust anns 3() and fulcrum 29 pivot 28 and connecting pin 27 Is shown Grease dispersal nipple 34 and channel 33 and the nterfacmg greased areas between bracket 18 and discs 32 provide a brake action or dog to prevent the backlash of the hand lever 25 The hand lever 25 Is shown welded at 35 to the outsides of the containing discs 32 Fig. 3 shows the cross section of the side vow of the alve boas] 9 and It s flanges 20 with the resTITently de-formable sleeve 1() m the fully open full flow position The valve closing gate 14 has been fully extended upwards by hand lever 2: allowing the reslentiv de- fonnable sleet c I () to push the closmg gate asscTnbly outwards and upwards and the reshent sleeve has returned IO it s f 11 flow open position The sleeve 10 Is shown vvlhout pplne flanges bolted on and with it s tremble proJectmg abutments 13 uncontamed and uncompressed The sleeve 10 Is shown centrally locked m position by retain ng ring 11 This cross section short s the retaining ring 11 solidly backed up against tire step 22 at both macluncd ends ol the tube 19 \\hch fonns the Nalve s boa! 1') Which In tunn Is welded to the calve s flanges 20 at weld 21 The h elf turn le\cr 2: Is \\cidcd at 3 to the outside ol contamng disc 32 \shch m tunn Is connected at fulcmu 29 b\ thrust anns,() to connecting pm 27 Tle closing gate 14 Iras been pulled up. sldmg between parallel guides 26 Fig. I shows a cross section of the valve with the sleeve 1() In the fuliv open position gTvmg f 11 flow of the pipe Inure fluid The Fared lever 2: can be placed at any position and can be arranged to open and close the valve through unv arc of 180 degree travel backwards or fonvards or under or over Fig. 5 shows the cross section of the side view of tire moulded resiliently de-fonnable sleeve 10 and al either end of the sleeve 10 are external circular grooves 12 moulded Into the outside diameter of the sleeve The retamng rings 11 slip mto these grooves 12 and also mto the recess provided m the valve flanges 1: The protruding flexible abutment of the sleeve 13 will on the boltmg on of the opposing pipe line flanges compress Into lugh pressure fluid seals 16 which contun the pressured fluid \'thm tire valve s sleeves 1() and In the pipe Ime The sleeve has no mtemal or extenral reinforcement Fig. 6 shows tin o valves Jomed together by bracket 36 with their closing assemblies positioned back to back Both valNes have their closing levers 25 interconnected by sleeve 37 and locked by pins 38 Both ha 1d levers 25 are positioned to face m the same direction throughout their half turn arc of travel Therefore as one valN e Is locked Into It s fully opened position the other vat\ e is automatically locked mto it s fulls closed position When the hand lever Is reversed to the end of it s opposite half turn arc of travel both salNcs open and closed positions are agam reversed Fig. 7 shows the limo valves Joined together as shown and described m Fig. 6 The interconnected hand levers 2: are shown m their neutral position half way between each valves fully open auld fully closed position Both valves closing gates 14 and their reslentiv de- fonnabic sleeves 10 are respectively half open and half closed depending on the direction of movement of their Rand lee ers 2:

Claims

CLAIM I

A tuber salve body fabricated from standard tubes and flanges mto \hch is inserted a resiliently de fonnable sleeve hitch Is locked into place by two retiming rings i\ hitch are backed against the shoulder of the tubular calve body whom the recess In the flange bore into w hitch the sleeve abutments are compressed Into static seals CLAIM 2 A lubuhr valve boa\ according to Cla m 1 w lath a crosses use slot to accommodate the sldmg closing gate and to which Is \\ elded the bucket with it's vertical gate slot m ahgnment in oath the 18() degree off set half round fulcoum slot and central pivot location CLAIM 3 A half tuna lever operated closmg gate with a half round leadmg edge confonnmg to the contour of the \ ale e s tubular boa\ agamst \hch the sleeve Is pinched shut by pushing the top half of the sleeve Into it s bottom half giving an elastic up thrust force to lock the fulcrum Into the false closed position

CLAIM

A half lung lever operated closing gate i\ hitch shdes \\ thm it s guide slots according to Claun 2 and Is actuated by hand lever operating through a half tunn pivot and fulcrum action to produce a progressive mcreasmg closing force until the slccvc Is pmched tights shut and the fulcrum Is locked m the valve closed post CLAIM 5 A half tune hand lever closmg assembly \hch actuates pivoting brake discs situated on both sides of the bracket mto which viscous grease Is pumped providing a brake effect to prevent hand lever backlash when the le\ cr Is moved out of the locked closed position CLAIM 6 A mouldcd rcshcntly dc-formablc sleeve according to Claim I having substantial wall thickness and no mtcnnal or c;tcnnal rcmforcelncnt with moulded grooves around the outside diameter provdmg outward proJcctmg seal abutments CLAIM 7 A reshentl de-fonnable sleeve according to Claim 3 wluch m the pmched closed position gives an elastic up thrust force locking the valve m It's closed position.

CLAIM 8 A resiliently de-fonnable sleeve \vhICh lIT the pmched closed position provides elastic shock absorption areas at both sides of the closed gale CLAIM ') A combmaton of t\ o valves of this invention locked together side by side \1th their closing and openung half tuna Icvcrs Interconnected providing a flow diverter selection of one of two pipe line outlets.