DK142378B

DK142378B - Socket pipe assembly.

Info

Publication number: DK142378B
Application number: DK288975A
Authority: DK
Inventors: Sven Nyman
Original assignee: Polyputki Oy
Priority date: 1975-06-25
Filing date: 1975-06-25
Publication date: 1980-10-20
Also published as: DK142378C; DK288975A

Description

(11) FREMLÆGGELSESSKRIFT 142378 \rb[/ DANMARK «D 'm.ci.s f is l 17/02 «(21) Ansøgning nr. 2889/75 (22) Indleveret den 25· jUH. 1975 (24) Løbedag 25· jUH. 1975 (44) Ansøgningen fremlagt og fremlæggeteesskriftet offentliggjort den 20 · OKfc . 1 980(11) PRESENTATION LETTER 142378 \ rb [/ DENMARK «D 'm.ci.s f is l 17/02« (21) Application no. 2889/75 (22) Filed on 25 · jUH. 1975 (24) Running Day 25 · jUH. 1975 (44) The application was submitted and the petition published on 20 · OKfc. 1 980

DIREKTORATET FORDIRECTORATE FOR

PATENT- OG VAREMÆRKEVÆSENET ^ ^00181 1,8,1 (71) POLYPUTKI OY, Kalevagatan 5 00100 Helsingfors 10, PI.THE PATENT AND TRADEMARK SERVICE ^ ^ 00181 1,8,1 (71) POLYPUTKI OY, Kalevagatan 5 00100 Helsinki 10, PI.

(72) Opfinder: Sven Nyman, Mathesiusgatan 6, 66900 Nykarleby, FI.(72) Inventor: Sven Nyman, Mathesiusgatan 6, 66900 Nykarleby, FI.

(74) Fuldmægtig under sagens behandling:(74) Proxy during the proceedings:

Dansk Patent Kontor ApS.Dansk Patent Kontor ApS.

(54) Mufferørs amli ng.(54) Mufferørs amli ng.

Den foreliggende opfindelse angår en mufferørsamling mellem en med muffe forsynet rørende og en i muffen indskydelig spidsende og af den art, hvor muffen har et med hovedsagelig radiale ringformede flader udført ringformet spor med en længst fra muffens åbning anbragt sporafsats, hvilket spor tjener til optagelse af en elastisk tætningsring med to ben, der går sammen i en mod muffens åbning vendende roddel, og hvor den aksiale længde og dybden af sporets radiale yderdel hovedsagelig svarer til tætningsringens radiale yderdel med det ene ben, medens tætningsringens inderdel med det andet ben i tætningsstilling rager ind i sporets inderdel, der hovedsagelig har tilsvarende aksial længde.The present invention relates to a sleeve pipe joint between a sleeve provided with a sleeve and a pointed end which can be pushed into the sleeve and of the type in which the sleeve has an annular groove formed with substantially radial annular surfaces with a groove ledge furthest from the sleeve opening, which groove serves to receive an elastic sealing ring with two legs joining together in a root part facing the opening of the sleeve, and where the axial length and depth of the radial outer part of the groove substantially corresponds to the radial outer part of the sealing ring with one leg, while the inner part of the sealing ring with the other leg projects in sealing position into the inner part of the track having substantially the same axial length.

2 1423782 142378

Indskydningen af en glat spidsende i en med muffe forsynet rørende stiller særlige krav til den mellemliggende tætningsring. Tætningsringen skal så tæt som muligt ligge an mod spidsenden, men der opstår ofte vanskeligheder, når denne skydes ind. Endekanten støder nemlig let mod tætningsringen, hvilket kan resultere i, at tætningsringen ruller, når spidsenden skydes videre ind i muffen. Det kan også ske, at spidsenden hlot skyder tætningsringen frem foran sig. Om der er opnået tætning, kan ikke konstateres udefra.The insertion of a smooth tip into a sleeve provided with a sleeve places special demands on the intermediate sealing ring. The sealing ring must be as close as possible to the tip end, but difficulties often arise when it is pushed in. The end edge abuts easily against the sealing ring, which can result in the sealing ring rolling when the pointed end is pushed further into the sleeve. It can also happen that the pointed end hlot pushes the sealing ring forward in front of it. Whether a seal has been obtained cannot be ascertained from the outside.

Era det franske patentskrift nr. 1.149.513 kendes en mufferørsam-ling af den i indledningen nævnte art, der har en i tværsnit V-formet tætningsring, hvis radialt indre flade udgår fra den nærmest muffeåbningen liggende kant af sporet i muffen og strækker sig skråt indad mod rørets midte. Ulempen ved denne mufferørsamling er i og for sig den samme, som ovenfor anført, idet spidsenden ved indføringen, hvis denne ikke sker fuldstændig centreret i muffen, kan gribe fat i tætningsringens roddel og på grund af dennes elasticitet føre den med sig ved den videre indskydning, således at tætningen må anses for ret problematisk.French Patent Specification No. 1,149,513 discloses a sleeve pipe assembly of the type mentioned in the introduction, which has a cross-section V-shaped sealing ring, the radially inner surface of which extends from the edge of the groove in the sleeve lying closest to the socket opening and extends obliquely. inwards towards the center of the tube. The disadvantage of this sleeve pipe assembly is in itself the same as stated above, as the pointed end of the insertion, if this does not take place completely centered in the sleeve, can grip the root part of the sealing ring and, due to its elasticity, carry it with it on further insertion. , so that the seal must be considered quite problematic.

Formålet med den foreliggende opfindelse er at eliminere de nævnte ulemper og tilvejebringe en mufferørsamling af den angivne art, hvor spidsenden under indføringen i muffen først berører tætningsringen, når den har passeret roddelen.The object of the present invention is to eliminate the said disadvantages and to provide a sleeve pipe assembly of the specified kind, the pointed end during the insertion into the sleeve only touching the sealing ring when it has passed the root part.

Dette formål opfyldes af en mufferørsamling, der ifølge opfindel-.sen er ejendommelig ved, at tætningsringen, der har Y-formet tværsnit med ben af forskellig længde, har en roddel med ensartet tykkelse lig med eller mindre end sporets største radiale dybde, og at den mellem benene beliggende frie spalte har en sådan aksial længde, at den, når tætningsringen er presset ind i sporet, strækker sig i aksial retning fra sporafsatsens mod muffens åbning vendende radiale ringformede flade og i hovedsagen frem til det radialplan, der går gennem overgangen mellem den mod rørets indre vendende side af det længere ben og roddelens inderside.This object is achieved by a sleeve pipe assembly, which according to the invention is characterized in that the sealing ring, which has a Y-shaped cross-section with legs of different lengths, has a root part with a uniform thickness equal to or less than the greatest radial depth of the groove, and that the free gap located between the legs has such an axial length that, when the sealing ring is pressed into the groove, it extends in the axial direction from the radial annular surface of the groove ledge towards the opening of the sleeve and substantially up to the radial plane passing through the transition between the side of the longer leg facing the inside of the tube and the inside of the root part.

Ved at gøre tykkelsen af roddelen mindre end spordybden, kan spidsenden på det ene rør føres ind i muffen på det andet rør uden at påvirke den i sporet lejrede roddel, idet spidsenden først berører 5 142378 tætningsringen ved det tyndere og dermed mere fleksible, indre ben, der giver efter og lægger sig i den ringformede sporafsats.By making the thickness of the root part smaller than the groove depth, the tip end of one pipe can be inserted into the sleeve of the other pipe without affecting the root part mounted in the groove, the tip end first touching the sealing ring at the thinner and thus more flexible inner leg. , which yields and settles in the annular track ledge.

En foretrukken udformning af samlingen ifølge opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 viser en mufferørsamling, delvis i længdesnit, fig. 2 et tværsnit af tætningsringen i ubelastet tilstand, i større målestok, og fig. 3 et snit gennem muffedelen med spor, men uden tætningsring.A preferred embodiment of the assembly according to the invention is explained in more detail in the following with reference to the drawing, in which fig. 1 shows a sleeve pipe assembly, partly in longitudinal section, fig. 2 is a cross-section of the sealing ring in unloaded condition, on a larger scale, and FIG. 3 a section through the socket part with grooves, but without sealing ring.

De to rør, som skal forbindes og tætnes indbyrdes, er betegnet med 2 og 3.The two pipes to be connected and sealed together are denoted by 2 and 3.

Røret 2 er et rør, der har en spidsende, som er indrettet til at kunne sættes ind i muffen i det andet rør 3. Røret 3's ende er forsynet med en muffedel 1, hvis indre diameter er lidt større end røret 3's indre diameter, svarende til 2 gange vsgtykkelsen af røret 2, således at der opnås en jævn overgang mellem de to rørs indersider, når rørene er samlede.The tube 2 is a tube having a pointed end which is arranged to be able to be inserted into the sleeve in the second tube 3. The end of the tube 3 is provided with a sleeve part 1 whose inner diameter is slightly larger than the inner diameter of the tube 3, corresponding to 2 times the wall thickness of the pipe 2, so that a smooth transition is obtained between the insides of the two pipes when the pipes are assembled.

Muffedelen 1 er forsynet med en ringformet del 4 med stor godstykkelse, i hvis indre overflade der findes et ringformet spor 5, hvori en tætningsring 6 er indsat.The sleeve part 1 is provided with an annular part 4 with a large wall thickness, in the inner surface of which there is an annular groove 5, in which a sealing ring 6 is inserted.

Tætningsringen 6 har i tværsnit form som et Y med en ringformet roddel 6c, hvis tværsnit er tilnærmelsesvis rektangulært, og hvorfra der udgår to ben 6a og 6b. Disse ben er fremstillet af et elastisk materiale, såsom formstof eller gummi; roddelen 6c kan bestå af samme materiale eller består om ønsket af et noget hårdere materiale. Benet 6a er noget længere end benet 6b og danner en større vinkel med roddelen 6c's aksiale midterlinie end benet 6b. Materialet til benene er så elastisk, at de kan presses mod hinanden, som vist i fig. 1. På grund afdets større frie længde rager benet 6a i tætningsringens sammenklemte tilstand ud over benet 6b's frie ende, som vist i fig. 1.The sealing ring 6 is in cross section in the form of a Y with an annular root part 6c, the cross section of which is approximately rectangular, and from which two legs 6a and 6b emanate. These legs are made of an elastic material, such as plastic or rubber; the root part 6c may consist of the same material or, if desired, consist of a somewhat harder material. The leg 6a is somewhat longer than the leg 6b and forms a larger angle with the axial centerline of the root part 6c than the leg 6b. The material for the legs is so elastic that they can be pressed against each other, as shown in fig. Due to the greater free length of the section, the leg 6a in the clamped condition of the sealing ring protrudes beyond the free end of the leg 6b, as shown in fig. 1.

Sporet 5 har vinkelret på røret 3's længdeakse en radial dybde, som i hovedsagen svarer til tykkelsen af roddelen 6c og til den samlede tykkelse af benene, når disse er presset mod hinanden. I ikke sammenklemt tilstand derimod er tætningsringens største radiale dimension ved benspidseme betydeligt større end sporets radiale dybde. Sporet 5 er udformet med en ringformet afsats 5a, som begrænser bevægelsenThe groove 5 has a radial depth perpendicular to the longitudinal axis of the tube 3, which substantially corresponds to the thickness of the root part 6c and to the total thickness of the legs when these are pressed against each other. In the non-compressed state, on the other hand, the largest radial dimension of the sealing ring at the bone tips is considerably larger than the radial depth of the groove. The groove 5 is formed with an annular ledge 5a which restricts the movement

Claims

142378 4 of the long lien 6a when this is pressed down into the groove. The axial length of the radial outer part of the groove corresponds to the total length of the leg 6b and the root part 6c. The vessel assembly must be mounted, the sealing ring 6 is placed in the groove 5 so that its legs are directed inwards into the sleeve. When the tube 2 is then inserted, its pointed end will slide along the inclined surface of the leg 6a, whereby the leg is pressed down into the groove 5a. Due to the elasticity of the leg, it tries to return to its free position and thereby comes to lie close to the tube

In the same way, the leg 6b will be pressed down into the groove part 5b and exert a pressure against the bottom of the track, the leg being somewhat thicker at the tip than at the root. Experiments have shown that this seal seals in an excellent way the inevitable clearance between the sleeve-provided touch and the tip end. The medium which is passed through the pipe provided with the joint penetrates via the gap towards the sealing ring and reaches the gap between the two legs. In addition to the resulting pressure pressing the root part 6c of the sealing ring against the wall of the groove 5 towards the free end of the sleeve, it also presses the two legs apart, which further improves the tightness between the leg 6a and the tube 2 and between the leg 6b and the bottom of the groove. It has even been found that this seal can withstand high pressures, the sealing effect increasing as the pressure in the pipe increases. Since the end of the leg 6a is sharply chamfered, the medium in the tube can also not penetrate through the clearance and into between the leg 6a and the tube 2, which further ensures the sealing ability. PAT EUTKRAV. Sleeve pipe joint between a sleeve provided with a sleeve and a pointed end which can be pushed into the sleeve, the sleeve (1,4) having an annular groove (5) made with substantially radial annular surfaces with a groove ledge (5a) arranged furthest from the opening of the sleeve (1,4) , which groove (5) serves for receiving an elastic sealing ring (6) with two legs, which merge into a root part facing the opening of the sleeve (1, 4), and where the axial length and the depth of the radial outer part of the groove substantially correspond to the radial outer part of the sealing ring with one leg (6b), while the inner part of the sealing ring with the other leg (6a) in the sealing position projects into the inner part of the groove, which has substantially corresponding axial length, characterized in that