DK156744B - PACKAGE FOR USE IN A FLUID VALVE - Google Patents

Description

DK 156744 BDK 156744 B

Opfindelsen angâr en pakning af den i krav l's indled-ning angivne art.The invention relates to a package of the kind specified in the preamble of claim 1.

En pakning af denne art er kendt fra USA patentskrift 5 nr. 3 532 123. Pakningen if0lge dette patentskrift om-fatter en muffe og et ventileleraent eller en staminé, som er drejelig i muffen. Gummibelægning er vulkaniseret eller limet til indersiden og ydersiden af muffen, idet sammenhaengende dele af den indvendige og udvendige be-10 lægning strækker sig gennem muffens indl0bs- og udl0bs-porte. Den indvendige tætningsbelægning omslutter den bevægelige stamme og udg0r eh tætning mod stammen ved hjælp af tryk fra det elastiske tætningsmateriale. Som f0lge af at gummibelægningen er vulkaniseret eller limet 15 til muffen, kan vandtrykket ikke pâvirke tætningstryk- ket, som ud0ves af tætningen mod stammen. Ingen bevægel-se kan forekomme imellem tætningen og muffen, sâledes at det n0dvendige tætningstryk blot kan fremkomme som f0lge af elasticiteten i selve tætningsmaterialet. En væsent-20 lig ulempe ved en sâdan konstruktion er, at det tætningstryk, som skal ud0ves mod stammen, er sâ stort, at fri og uhindret relativ bevægelse imellem stammen og muffen vanskeligg0res. Dette skyldes, at tætningstrykket skal udvikles af elasticiteten i tætningen. Den kendte 25 konstruktion har derfor vist sig kommercielt utilfreds-stillende.A package of this kind is known from US Patent No. 5,532,123. The package according to this patent comprises a sleeve and a valve element or a stamen which is rotatable in the sleeve. Rubber coating is vulcanized or glued to the inside and outside of the sleeve, with continuous portions of the inner and outer coating extending through the inlet and outlet ports of the sleeve. The inner sealing coating encloses the movable stem and constitutes a seal against the stem by pressure from the resilient sealing material. As a result of the rubber coating being vulcanized or glued to the sleeve, the water pressure cannot affect the sealing pressure exerted by the seal against the stem. No movement can occur between the seal and the sleeve, so that the necessary sealing pressure can only arise as a result of the elasticity of the seal material itself. A major disadvantage of such a construction is that the sealing pressure to be exerted against the stem is so large that free and unobstructed relative movement between the stem and the sleeve is made difficult. This is because the sealing pressure must be developed by the elasticity of the seal. Therefore, the known construction has proved to be commercially unsatisfactory.

If0lge opfindelsen undgâr man nævnte ulemper ved den kendte teknik ved at den indledningsvis angivne pakning 30 er ejendommelig ved det i krav l's kendetegnende del angivne.According to the invention, the disadvantages of the prior art are avoided in that the package 30 initially mentioned is characterized by the characterizing part of claim 1.

Som f0lge af at pakningens portparti er bevægeligt i forhold til muffen, kan det ud0ve et tætningstryk som 35 direkte résultat af vandtrykket fra vandet, som passerer gennem kanalâbningen. Derved opnâs, at ventillegemet kanDue to the port portion of the gasket being movable relative to the sleeve, it may exert a sealing pressure as a direct result of the water pressure from the water passing through the duct opening. This provides that the valve body can

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2 bevæges væsentlig lettere i ventilmuffen. Opfindelsen skal i det f0lgende nærmere beskrives med henvisning til tegningen/ hvorpâ: 5 fig. 1 viser et længdesnit gennem en væskeventil, hvor enkelte dele - for en tydeligheds skyld - er udeladt, og med en pakning if0lge opfindelsen, fig. 2 viser et sidebillede af den ene af to identiske 10 dele, soin danner pakningen, fig. 3 viser et snit gennem-pakningen, .....2 is moved much easier in the valve sleeve. BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to the accompanying drawings, in which: FIG. Figure 1 is a longitudinal section through a liquid valve in which individual parts - for the sake of clarity - are omitted and with a gasket according to the invention; 2 is a side view of one of two identical parts forming the gasket; FIG. 3 shows a section through the gasket, .....

fig. 4 viser et sidebillede af en modificeret udf0rel-15 sesform for en pakning if0lge opfindelsen, fig. 5 viser et længdesnit af en yderligere, modificeret udf0relsesform for en pakning if0lge opfindelsen, 20 fig. 6 viser et snit af pakningen if0lge fig. 5, og fig. 7 viser et sidebillede af pakningen if0lge fig. 6.FIG. Figure 4 is a side view of a modified embodiment of a package according to the invention; 5 shows a longitudinal section of a further modified embodiment of a package according to the invention; FIG. 6 is a sectional view of the gasket according to FIG. 5, and FIG. 7 shows a side view of the gasket according to FIG. 6th

Fig. 1 viser én anvendelse af pakningen if0lge opfindel-25 sen. Et hus er angivet ved 10 og kan være generelt cy-lindrisk udformet med en bund 12 og en âben top 14. In-den i huset 10 er anbragt en blandingsventil, som inde-holder en muffe 16 og en indre staminé 18. Stammen 18 er drejelig. i forhold til muffen for at styre passagen af 30 fluidum fra ventilen. En hætte eller et lâg 26 kan være skruet pâ det udvendige af huset 10, og et betjenings-hândtag kan passende være fastgjort til den udadragende ende af- stammen. 18.FIG. 1 shows one application of the package according to the invention. A housing is indicated by 10 and may be generally cylindrical in shape with a base 12 and an open top 14. Inside the housing 10 is a mixing valve containing a sleeve 16 and an inner stem 18. The stem 18 is rotatable. relative to the sleeve to control the passage of 30 fluid from the valve. A cap or cover 26 may be screwed to the exterior of housing 10, and an actuating handle may conveniently be secured to the outwardly extending stem. 18th

35 Stammen eller stemplet 18 er huit og kan hâve indl0bs-porte 20 og et bundudl0b 22. En pakningsring 24, som er 3The stem or piston 18 is hot and can have inlet ports 20 and a bottom outlet 22. A sealing ring 24 which is 3

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anbragt omkring det udvendige af stammen, udg0r en pak-ning imellem stammen og det indre af muffen 16.disposed around the exterior of the stem forms a gasket between the stem and the interior of the sleeve 16.

Muffen 16 kan indeholde et par fluidumindlpbsporte, af 5 hvilke den ene er vist ved 30, som er generelt pâ linje med indl0bsportene 34 og 36 i huset 10. Nâr ventilen an-vendes som en blandingsventil, vil portene 34 og 36 f0re forskellige fluider imod muffeindl0bsportene og den hule stamme. Bunden af muffen er âben og er i forbindelse med 10 husets bundudl0b 40.The sleeve 16 may contain a pair of fluid inlet ports, one of which is shown at 30, which is generally in line with the inlet ports 34 and 36 of the housing 10. When the valve is used as a mixing valve, the ports 34 and 36 will conduct different fluids against the sleeve inlet ports and the hollow stem. The bottom of the sleeve is open and is connected to the bottom outlet 40 of the housing.

Pakningskonstruktionen, som er angivet heri, kan vaere udformet i to identiske parter eller halvdele, angivet ved 50 og 52. Hver af pakningshalvdelene indeholder en 15 hoveddel 54, som er anbragt inden i en fordybning i muffen, angivet ved 56. Pakningssektionerne 50 og 52, som tilsammen udg0r en cylinder, kan hâve en indvendig, ind-adrettet skulder ved hver ende, angivet ved 58, som er anbragt inden for en tilsvarende rille 60 pâ det udven-20 dige af muffen. Kombinationen af skuldrene 58 og riller-ne 60 er i stand til at forankre pakningen til muffen for derved at tillade, at muffen indf0res og fjernes fra huset. Fordi muffen er forankret, undgâs enhver mulighed for, at den bliver tvunget igennem udl0bsporten ved en 25 pludselig trykforandring.The gasket assembly disclosed herein may be formed in two identical portions or halves, designated at 50 and 52. Each of the gasket halves contains a main body 54 located within a recess in the sleeve, indicated by 56. Gasket sections 50 and 52 , which together constitute a cylinder, may have an inner, indented shoulder at each end, indicated at 58, which is disposed within a corresponding groove 60 on the exterior of the sleeve. The combination of the shoulders 58 and grooves 60 are capable of anchoring the gasket to the sleeve thereby allowing the sleeve to be inserted and removed from the housing. Because the sleeve is anchored, any possibility of being forced through the outlet port is prevented by a sudden change in pressure.

Der er en indadvendt portpakningsdel 62, som straekker sig ind i hver af portene 30 og 32. Porttætningsdelene antager portenes form, f.eks. cirkulær, oval eller rek-30 tangulær, og kan hâve en indre kant 64, fortrinsvis rund, set i tværsnit, sâledes at den har minimal kon-takt, fortrinsvis linjekontakt, med stemplet eller stammen 18. Fordelen ved den minimale kontakt er, at den holder friktionen mellem stemplet og pakningen pâ et mi-35 nimum. Det er vigtigt, at stemplet kan dreje frit inden i muffen for ventilbetjeningen. Hver af pakningshalvde-There is an inward-facing door gasket member 62 which extends into each of the ports 30 and 32. The door seal members assume the shape of the gates, e.g. circular, oval or rectangular, and may have an inner edge 64, preferably round, in cross-section, so as to have minimal contact, preferably line contact, with the plunger or stem 18. The advantage of the minimal contact is that it keeps the friction between the piston and the seal at a minimum. It is important that the piston can rotate freely within the valve control sleeve. Each of the packaging halves

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t lene 50 og 52 har en perferiel vulst 66, soin straekker sig langs enderne af hver halvdel og langs de aksialt forl0bende kanter for derved at danne en fuldstændig pakning mellem muffen og det indre af huset. En anden 5 vulst 68 strækker sig omkring hver portpakningsdel 62, men har afstand fra kanten af portpakningsdelen for sam-men med det indre af huset 10 at begrænse et kammer 70.The tines 50 and 52 have a peripheral bead 66 which extends along the ends of each half and along the axially extending edges, thereby forming a complete gasket between the sleeve and the interior of the housing. A second bead 68 extends around each port gasket portion 62, but has a distance from the edge of the gate gasket portion for restricting a chamber 70 together with the interior of housing 10.

Hvert af kamrene 70 er rettet pâ linje med portpaknings-delene 62, sâledes at fluidum, som er tilstede ved por-10 tene i bâde âben og lukket stilling, er i stand til at str0mme ind i kamrene og derved frembringe et indadret-tet tryk pâ portpakningsdelene 62 og sâledes stramt tvinge kanterne 64 i tætnende ber0ring med stemplet 18.Each of the chambers 70 is aligned with the gate packing members 62 so that fluid present at the ports in both open and closed positions is capable of flowing into the chambers, thereby producing an inward pressure. on the gasket parts 62 and thus tightly force the edges 64 into sealing contact with the piston 18.

Vulsten 66 danner en rundtgâende pakning mellem muffen 15 og huset. Vulsten 68 medvirker til dannelse af en pakning mellem det indre af huset og det ydre af pakningen og begrænser kammeret 70, som frembringer indadrettet tryk for stramt at tvinge kanten 64 i tætnende ber0ring med stemplet 18.The bead 66 forms a circumferential gasket between the sleeve 15 and the housing. The bead 68 assists in forming a gasket between the interior of the housing and the exterior of the gasket and limits the chamber 70, which produces inward pressure to forcely force the edge 64 into sealing contact with the piston 18.

20 I ventilens âbne stilling forhindrer vulsterne 66 og 68 udvendig udsivning og tværstr0mning. I den lukkede stilling er bâde vulsterne og portpakningerne i stand til at forhindre udsivning og tværstr0mning.20 In the open position of the valve, the beads 66 and 68 prevent external leakage and cross flow. In the closed position, both the beads and door gaskets are capable of preventing leakage and cross flow.

2525

Den i fig. 4 viste udf0relsesform omfatter en anden pe-riferiel vulst 72, som tilf0jer et yderligere periferisk tætningsomrâde til pakningshalvdelene 50 og 52. I nogle konstruktioner vil den anden vulst 72 ikke strække sig 30 periferisk omkring hver halvdel, men kun strække sig langs enderne, idet der intet behov er for at hâve dob-belt vulst langs de to halvdeles tilst0dende kanter.The FIG. 4, another peripheral bead 72 includes a further peripheral sealing area for the packing halves 50 and 52. In some designs, the second bead 72 will not extend circumferentially about each half but only extend along the ends, there is no need to have double bead along the two half-adjacent edges.

I det halve snit i fig. 5, 6 og 7 er kun vist den del af 35 ventilen, som er i nærheden af pakningen. Som det var tilfældet ved de andre udf0relsesformer if0lge opfindel-In the half section of FIG. 5, 6 and 7, only the portion of the valve located near the gasket is shown. As was the case with the other embodiments of the invention,

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5 sen, kan pakningskonstruktionen fremstilles af to i det væsentlige identiske parter. Pakningsdelen 80 i fig. 5 kan hâve en topvulst 82, en bundvulst 83, en cirkulær vulst 84 og kan være anbragt i en fordybning 86, soin er 5 udformet i det ydre af muffen 88. Udvendige vulster 82 og 83 er i det væsentlige af sarame art som vulsten 68.In this case, the gasket assembly can be made of two substantially identical parts. The gasket portion 80 of FIG. 5 may have a top bead 82, a bottom bead 83, a circular bead 84 and may be disposed in a recess 86, so 5 is formed in the exterior of the sleeve 88. Exterior beads 82 and 83 are substantially of the same kind as the bead 68 .

Indadrettede skuldre 81 ved de modstâende ender af pak-ningen standser kort f0r fuldstændig fyldning af riller-ne 85 og efterlader derved et lille mellemrum. Nâr der-10 ved ventilen bliver indfprt eller fjernet, kan pakningen falde sammen, nâr den f0res forbi portene for at undgâ at folde eller beskadige den. Huset 90 kan hâve en port 92, som retter vand indefter gennem porten 94 i muffen imod den frem- og tilbagegâende og roterende stamme 96.Inwardly shoulders 81 at the opposite ends of the gasket stop shortly before complete filling of the grooves 85, leaving a small gap. When the valve is inserted or removed at the valve, the gasket may collapse as it passes past the gates to avoid folding or damaging it. The housing 90 may have a port 92 which directs water inwardly through the port 94 of the sleeve against the reciprocating and rotating stem 96.

15 Pakningen 80 har en portpakningsdel 98, der som vist pâ tegningen har en aksial forlængelse, hvis længde er be-tegnet ved 100, og som er st0rre end bredden af overfladen 102, som danner kanten af porten 94 i muffen 88. Nâr derved ventilen er i den lukkede stilling, som er vist 20 pâ tegningen, vil portpakningsdelen blive tvunget udef- ter af stammen. Pakningen deformeres bort fra sin natur-lige stilling, hvilken deformation frembringer en udad-rettet kraft, som stramt holder den indre kant 104 af portpakningsdelen i tætnende kontakt med stammen 96.The gasket 80 has a gate gasket portion 98 which, as shown in the drawing, has an axial extension whose length is denoted by 100 and which is greater than the width of the surface 102 forming the edge of the port 94 of the sleeve 88. As a result, the valve is in the closed position shown in the drawing, the gate packing portion will be forced outside the stem. The gasket is deformed away from its natural position, which produces an outward force which tightly holds the inner edge 104 of the gate gasket member in sealing contact with the stem 96.

25 Idet stammen b0jer og tætner bort fra sin naturlige stilling, er der en voksende kraft eller en forspæn-dingskraft, som spger stramt at pâvirke tætningskanten 104 i tætnende kontakt med stammen. Idet tætningen er længere end npdvendigt, er der ogsâ kompensation for 30 pakningsslid.As the trunk bends and seals away from its natural position, there is a growing force or biasing force which tightly affects the sealing edge 104 in sealing contact with the trunk. Since the seal is longer than necessary, there is also compensation for 30 gasket wear.

Den viste pakning kan anvendes inden for et stort antal ventiler. Den kan være bueformet, cylindrisk eller til- spidset eller konisk. Den kan hâve en eller flere port- 35 pakningsdele. Det er vigtigt, at der er tilvejebragt et indadrettet tryk imod portpakningsdelen.The gasket shown can be used within a large number of valves. It may be arcuate, cylindrical or tapered or tapered. It may have one or more port packing parts. It is important that an inward pressure is provided against the gate packing member.

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66

Af vigtighed if0lge opfindelsen er den mâde, pâ hvilken pakningen er forankret til muffen, ikke blot for stramt at holde pakningen i stilling under indf0ring og fjer-5 nelse af ventilen, men ogsâ til at forhindre pakningen i at blive tvunget gennem en udl0bsâbning ved en pludselig trykpâvirkning.Of importance according to the invention, the manner in which the gasket is anchored to the sleeve is not only to keep the gasket in position during insertion and removal of the valve, but also to prevent the gasket from being forced through an outlet opening at an outlet. sudden pressure.

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Claims (5)

1. Pakning til anvendelse i en ventilkonstruktion for 5 væsker, især en cylindrisk ventil, omfattende et ven- tilhus (10), et i forhold til ventilhuset (10) bevæge-ligt ventillegerae (18) samt en mellemliggende muffe (16) med en portâbning (30), som kommunikerer med sammenfal-dende âbninger i ventillegemet (18) og ventilhuset (10), 10 for hvilken mellemliggende muffe (16) pakningen er ind-rettet med et portparti (62, 98), som strækker sig gen-nem portâbningen (30) i den mellemliggende muffe (16) og er udformet med en indre vulst (64, 104), som er indret-tet til at bringes i tætsluttende anlæg mod ventillege-15 met (18), samt et hovedparti (54), som omgiver portpar-tiet, og hvis modsatte sider er indrettet til at anbrin-ges i tætsluttende anlæg mod ventilhuset (10) og den mellemliggende muffe (16), kendetegnet ved, at portpartiet (62, 9’8T er bevægeligt i forhold til den 20 mellemliggende muffe (16, 88), at pakningen omfatter en ydre vulst (68, 84), som danner et kammer (70, 112), sâ-ledes at væsketrykket i kammeret pâvirker portpartiet, og at den indre vulst (64, 104) er indrettet til at ud-0ve et tætnende tryk mod ventillegemet (18, 96). 25A gasket for use in a valve assembly for 5 liquids, in particular a cylindrical valve, comprising a valve housing (10), a valve bearing (18) movable relative to the valve housing (10), and an intermediate sleeve (16) with a port opening (30) which communicates with collapsed openings in the valve body (18) and valve housing (10), for which intermediate sleeve (16) the gasket is provided with a port portion (62, 98) extending the door opening (30) in the intermediate sleeve (16) and is formed with an inner bead (64, 104) adapted to be sealed into the sealing system against the valve body (18), as well as a main portion (54 ), which surrounds the port portion and the opposite sides of which are arranged to be placed in tightly adjacent abutments against the valve body (10) and the intermediate sleeve (16), characterized in that the port portion (62, 9'8T is movable in proportion to the intermediate sleeve (16, 88), said gasket comprising an outer bead (68, 84) forming a chamber (70, 112), It is seen that the fluid pressure in the chamber affects the port portion and that the inner bead (64, 104) is adapted to exert a sealing pressure against the valve body (18, 96). 25 2. Pakning if0lge krav 1, kendetegnet ved, at den omfatter skulderpartielementer (58), som er anbragt i riller (60) pâ muffens (16) yderside.Package according to claim 1, characterized in that it comprises shoulder portion elements (58) arranged in grooves (60) on the outside of the sleeve (16). 3. Pakning if0lge krav 1, kendetegnet ved, at portpartiets (62, 98) indre vulst (64, 104) er sâledes udformet, at der dannes en minimal ber0ringsflade imel- lem vulsten (64, 104) og ventillegemet (18, 96). *Packing according to claim 1, characterized in that the inner bead (64, 104) of the door portion (62, 98) is designed to form a minimal contact surface between the bead (64, 104) and the valve body (18, 96). . * 4. Pakning if0lge krav 3, kendetegnet ved, at den indre vulst (64, 104) er bueformet. DK 156744 BGasket according to claim 3, characterized in that the inner bead (64, 104) is arcuate. DK 156744 B 5. Pakning if0lge krav 1# kendetegnet ved/ at den del af portpartiet (98)/ som er indrettet til at strække sig igennem portâbningen (94) i den mellemlig-5 gende muffe (88), har en radial udstrækning (100), som overstiger bredden af den flade (102), som danner portâbningen i den mellemliggende muffe (88). 10 15 20 25 30 35Gasket according to claim 1, characterized in that the part of the door portion (98) / which is arranged to extend through the door opening (94) in the intermediate sleeve (88) has a radial extension (100). exceeding the width of the surface (102) forming the port opening in the intermediate sleeve (88). 10 15 20 25 30 35