NO743558L

NO743558L -

Info

Publication number: NO743558L
Application number: NO743558A
Authority: NO
Inventors: A P Jones
Original assignee: Saunders Valve Co Ltd
Priority date: 1973-10-02
Filing date: 1974-10-01
Publication date: 1975-04-28
Also published as: SE7412330L; ZA746018B; CH594841A5; FR2246794B1; FR2246794A1; ES430534A1; AU7362174A; DE2445518A1; IT1019383B; CA1014136A; BE820491A; GB1450917A; AR202320A1; DK515274A; AT345047B; ATA792374A; JPS5082632A; NL7412978A

Description

Fjærende tetningsholderelement. Resilient seal holder element.

Denne oppfinnelse angår forbedringer ved tetningsholder-innretninger og særlig kuleventilsete-holderinnretninger og kule-ventiler innbefattet i slike innretninger. This invention relates to improvements in seal holder devices and in particular ball valve seat holder devices and ball valves included in such devices.

Det har vært foreslått en kuleventil med en stort sett sfærisk kik eller kule anordnet i ventilboringen med et parr ventilseter, ett på hver side av ventilen, som er ringformet og A ball valve has been proposed with a generally spherical poppet or ball arranged in the valve bore with a pair of valve seats, one on each side of the valve, which are annular and

danner tettende inngrpp med kiken og boringen. Kiken kan roteres for å bringe en boring som strekker seg gjennom den i flukt med gjennomløpende som avgrenses av de ringformede seter og med ventilboringen eller ut av flukt med gjennomløpende som avgrenses av setene, idet setene i alle tilfeller tetter mot kiken og ventilboringen for å hindre enhver strømning gjennom ventilboringen rundt forms a sealing engagement with the peephole and the bore. The yoke can be rotated to bring a bore extending through it flush with the through-hole defined by the annular seats and with the valve bore or out of flush with the through-hole defined by the seats, the seats in each case sealing against the yoke and the valve bore to prevent any flow through the valve bore around

Det er kjent et slikt ventilsete hvor et elastisk organ så som en spiralfjær anvendes for å tvinge setet aksialt med ventilboringen og mot kiken,, idet fjæren ligger en mot en stoppering (circlip) anordnet i ventilboringen eller en brystning i boringen., Such a valve seat is known where an elastic member such as a spiral spring is used to force the seat axially with the valve bore and against the check, the spring lying against a stop ring (circlip) arranged in the valve bore or a parapet in the bore.,

Ifølge foreliggende oppfinnelse tilveiebringes et elastisk eller fjærende tetningsholderelement for en tetning, omfattende: et stumpkjegle-element med en ende med stor diameter og en ende med mindre diameter og med avbrudd fordelt rundt enden av den større diameter slik at elementet i denne ende kan deformeres fjærene radielt innover og derved fjærene trykkes til anlegg mot et stopporgan i ventilboringen, og tetningskontaktende organer som rager radielt ut fra stumpkjegle-elementets ende med mindre diametér. According to the present invention, an elastic or springy seal holder element for a seal is provided, comprising: a frustoconical element with one end of a large diameter and one end of a smaller diameter and with interruptions distributed around the end of the larger diameter so that the element at this end can be deformed the springs radially inwards and thereby the springs are pressed into contact against a stop member in the valve bore, and seal contacting members which project radially from the end of the blunt cone element with smaller diameters.

De tetningskontaktende organer kan være fjærende forskyvbare aksielt i forhold til elementet. The seal contacting members can be resiliently displaceable axially in relation to the element.

Oppfinnelsen vil lettere forstås ut fra følgende be-skrivelse av et foretrukket utføringseksempel under henvisning til vedlagte tegning som bare omfatter én figur og viser et snitt gjennom en kuleventil i et plan langs ventilboringsaksen og kulens rotasjonsakse. The invention will be more easily understood from the following description of a preferred embodiment with reference to the attached drawing which only includes one figure and shows a section through a ball valve in a plane along the valve bore axis and the ball's axis of rotation.

Kuleventilen vist på tegningen er konvensjonell ved at den omfatter en boring 1, en sfærisk kik eller kule 2, en raanøver-spindel 3 og to ringformede ventilseter 4 som hver er forsynt med en §-ring 5. Et stopporgan 6 avgrenser det ene ventilsete i aksial-retnihgen. Det andre ligger an mot en flens 7 som strekker seg radielt ut fra den minste ende til et fjærende stumpkjegleformet element 8 på et tetningsholderelement 10 som kan være av metall eller syntetisk plastmateriale. Den største ende av det stump-kjeglede element 8 er utformet med avbrudd eller innsnitt 9. En leppeflens 11 ved denne ende ligger an mot et stopporgan, her en side 12 i en kanal 13 i ventilboringen. I sin avlastede eller uspente tilstand htr den største ende av stumpkjegle-elementet en utvendig diameter som er større enn boringens innvendige diameter. Ved anbringelse av elementet 10 i boringen trykkes det inn i boringen med den minste ende først, og med den største ende deformert radielt innover. Når leppeflensen 11 når kanalen vil den største ende ut-vides til inngrep med leppeflensen i kanalen. Trykk rundt kjeglen vil utlignes, på grunn av innsnittene som er fordelt rundt elementet 10. Flensen 7 er fortrinnsvis slik utformet at den gir fjærende etter når elementet presses bakover aksielt i boringen slik at leppen The ball valve shown in the drawing is conventional in that it comprises a bore 1, a spherical peephole or ball 2, a taper spindle 3 and two annular valve seats 4, each of which is provided with a §-ring 5. A stop member 6 delimits one valve seat in axial retnihgen. The other rests against a flange 7 which extends radially from the smallest end to a springy truncated cone-shaped element 8 on a seal holder element 10 which can be made of metal or synthetic plastic material. The largest end of the blunt-conical element 8 is designed with an interruption or incision 9. A lip flange 11 at this end rests against a stop member, here a side 12 in a channel 13 in the valve bore. In its unloaded or unstressed state, the largest end of the frusto-cone element has an outside diameter that is greater than the inside diameter of the bore. When placing the element 10 in the bore, it is pressed into the bore with the smallest end first, and with the largest end deformed radially inwards. When the lip flange 11 reaches the channel, the largest end will be extended to engage the lip flange in the channel. Pressure around the cone will be equalised, due to the notches which are distributed around the element 10. The flange 7 is preferably designed in such a way that it gives springy when the element is pushed backwards axially in the bore so that the lip

kommer til inngrep i kanalen og danner et aksielt fjærende trykk mot setet. engages in the channel and forms an axial resilient pressure against the seat.

I en modifisert kuleventil (ikke vist) er stopporganet 6 utelatt og hver av seteringene 4 holdes på plass ved hjelp av In a modified ball valve (not shown) the stop member 6 is omitted and each of the seat rings 4 is held in place by means of

respektive tetningsholder-elementer 10 i inngrep i en respektiv kanal 13 i ventilboringen. I dette tilfelle er kiken 6 anordnet i boringen under påvirkning av de innbyrdes motvirkende krefter fra de to holdereleraenter. respective seal holder elements 10 in engagement in a respective channel 13 in the valve bore. In this case, the peephole 6 is arranged in the bore under the influence of the mutually counteracting forces from the two holding bearings.

Claims

1. Resilient seal holder element for a seal, characterized in that it comprises: a blunt cone shaped element with an end with a larger diameter and an end with a smaller diameter and with incisions distributed around the end with a larger diameter so that the element at this end can be deformed springily radially inwards and thereby the springy end is pressed into contact against a stop means in a valve bore, as well as seal contacting means which project radially from the smaller diameter end of the blunt cone element.

2. Resilient seal holder element as specified in claim 1, characterized in that the seal contacting members are resiliently displaceable in the element's axial direction.

3. Resilient seal holder element as stated in claim 1 or 2, characterized in that the seal contacting members are a flange.

4. Resilient seal holding element as specified in one of the preceding claims, characterized in that the frustocone the element's end with a larger diameter is provided with a radially outward, directed lip flange for engagement in a channel formed in the valve bore.

5. Ball valve including a valve body defining a valve bore, a generally spherical poppet rotatably mounted in the valve bore, at least one annular valve seat in sealing engagement with the poppet and the valve bore wall and a resilient seal retainer element according to one of the preceding claims, which holds the valve seat in place, the larger diameter designed end of the frusto-cone element of the seal holder element engaging with a stop means in the valve bore*

6. Ball valve as specified in claim 5, characterized in that the sealing contact elements in the seal holder element are a flange, the flange abutting a surface on said valve seat"

7. Ball valve as specified in claim 5 or 6, characterized in that it includes two annular valve seats, in that each valve seat is retained by means of a seal holder element according to one of claims 1 to 4.