NO328538B1

NO328538B1 - Clamping sleeve connection

Info

Publication number: NO328538B1
Application number: NO19995223A
Authority: NO
Inventors: Peter Bauer; Roland Lederer; Walter Helf
Original assignee: Gabo Systemtech Gmbh
Priority date: 1998-10-29
Filing date: 1999-10-26
Publication date: 2010-03-15
Also published as: HU222722B1; CZ383399A3; NO995223L; HU9903940D0; PT997678E; DE19849941C1; PL191168B1; ES2179583T3; EP0997678A1; NO995223D0; DK0997678T3; HRP990330A2; EP0997678B1; CZ294014B6; SK148099A3; SK283512B6; HRP990330B1; RU2174636C2; DE59901910D1; PL336258A1

Abstract

The two half-shells(11,12) of the sleeve fitted over the oppositely lying pipe ends are braced on both sides by two sealing clamps(31-34) and in their final position a defined gap remains between the two clamps on the lower side and between the two clamps on the upper side. On the inside of the half-shells, on both sides of the inlaid sealing mats, clamping elements(42,44) are installed in a corresponding groove which is closed in relation to the planes of separation of the half-shells.

Description

Oppfinnelsen vedrører en av to halvskåler bestående klemmuffeforbindelse for hele rør og slike som er sammensatt av to halve rør, såsom kabelkanalrør, reparasjonsrør eller lignende, med en tetningsmatte mellom rørytterveggen og klemmuffe-innerveggen, hvilken ldemmuffeforbiridelse holdes i utstillingen ved hjelp av låsekiler. The invention relates to one of two half-cups consisting of a compression sleeve connection for whole pipes and such which are composed of two half pipes, such as cable duct pipes, repair pipes or the like, with a sealing mat between the pipe outer wall and the compression sleeve inner wall, which joint sleeve assembly is held in the exhibition by means of locking wedges.

Slike, av to halvskåler bestående rørmuffer er i og for seg kjent. Således viser DE 78 33 835 Ul en rørmuffe som angitt i innledningen til patentkrav 1, hvor det i hulrommet mellom røret og muffemidtdelen såvel som i skjøtene mellom de to halvskåler er lagt inn en høyviskøs tetningsmasse. Pipe sockets of this type consisting of two half-cups are known in and of themselves. Thus, DE 78 33 835 Ul shows a pipe sleeve as stated in the preamble to patent claim 1, where a highly viscous sealing compound is inserted in the cavity between the pipe and the middle part of the sleeve as well as in the joints between the two half-shells.

Disse rørmuffer har vist seg praktisk anvendbare og benyttes i et stort antall, fremfor alt for avtetting av kabelkanalrør. I den senere tid har teknologien med hensyn til legging av kabelkanaler endret seg vesentlig, idet det nå anvendes glideoljer for inntrekking av ka-belen, hvilke glideoljer angriper tetningsmassen kjemisk, hvorved tetningsmassen opp-løses og det ofte meget hurtig oppstår utettheter. Videre har det vist seg at viskositeten til de anvendte tetningsmasser varierer meget sterkt under ekstreme temperaturer og en-ten blir for myk eller for hård. These pipe sleeves have proven to be practically applicable and are used in large numbers, above all for sealing cable duct pipes. In recent times, the technology with regard to the laying of cable ducts has changed significantly, as lubricating oils are now used for pulling in the cable, which lubricating oils chemically attack the sealing compound, whereby the sealing compound dissolves and leaks often occur very quickly. Furthermore, it has been shown that the viscosity of the sealing compounds used varies greatly under extreme temperatures and either becomes too soft or too hard.

Fra EP 0650007 Bl er det kjent en ytterligere, av to halvskåler bestående rørmuffe, hvor man unngår disse ulemper. Det er lagt inn en på langs delt tetningsmatte mellom røret og rørmuffen, og denne tetningsmatte er sperret i et spor i en av de to halvskåler. From EP 0650007 B1, a further tube socket consisting of two half-cups is known, which avoids these disadvantages. A longitudinally divided sealing mat has been inserted between the pipe and the pipe sleeve, and this sealing mat is blocked in a groove in one of the two half-cups.

Disse kjente rørmuffer kan imidlertid bedres. De er riktignok tette, men bare opptil en However, these known pipe sleeves can be improved. They are indeed dense, but only up to one

grense på rundt 3 bar. Dette er ikke tilstrekkelig for mange nye anvendelsesområder. Et ytterligere trekk er at muffeforbindelsenes sammenholding i lengderetningen kan trenge en bedring. Det har nemlig vist seg at kabler, særlig glassfiberkabler med større lengder innføres i kabelkanalrørene under et høyt trykk. Det kan i denne forbindelse forekomme at kabelkanalrørene trekkes ut fra muffen, særlig i en reparasjonsstrekning, fordi lengde-sammenholdet ikke er tilstrekkelig. Er tetningsvirkningen utilfredsstillende, kan en rrykkreduseritig ved kabelinnføringen til og med fullstendig hindre gjennomføringen av fremgangsmåten, helt bortsett fra at vann ved anlegg i dypere sjikt eller på våte steder vil kunne trenge inn i kabelkanalrøret og hindre den ønskede kabelbenyttelse. limit of around 3 bar. This is not sufficient for many new areas of application. A further feature is that the connection of the sleeve connections in the longitudinal direction may need improvement. Namely, it has been shown that cables, in particular fiberglass cables with longer lengths, are introduced into the cable duct pipes under a high pressure. In this connection, it may happen that the cable duct pipes are pulled out of the sleeve, particularly in a repair section, because the length consistency is not sufficient. If the sealing effect is unsatisfactory, a jerk reducer at the cable entry can even completely prevent the procedure from being carried out, except that water in the case of installations in deeper layers or in wet places will be able to penetrate the cable duct pipe and prevent the desired use of the cable.

Hensikten med foreliggende oppfinnelse er å tilveiebringe en rørmuffeforbindelse som har en bedret tetthet, opptil ca. 10 bar, og som har den nødvendige lengdesammenhol-dingskraft for innføring av kabler med høye trykk. The purpose of the present invention is to provide a pipe socket connection which has an improved tightness, up to approx. 10 bar, and which has the necessary longitudinal cohesion force for introducing cables with high pressures.

De fordeler man oppnår med oppfinnelsen består særlig i at den økede tetnmgsvkkning gjør det mulig å pådra kabelkanalrøret med et høyt trykk og dermed muliggjøre bruk av moderne innblåsingsmetoder henholdsvis innspylingsmetoder for meget lange kabler, med samtidig virksom høy lengdekraftsammenholding i området ved rørmuffeforbindel-sen, slik at man på sikker måte hindrer at rørendene rives ut av muffen. The advantages achieved with the invention consist in particular in that the increased tightness makes it possible to apply a high pressure to the cable duct pipe and thus enable the use of modern blow-in methods or flush-in methods for very long cables, with at the same time effective high longitudinal force integration in the area of the pipe sleeve connection, such that the pipe ends are reliably prevented from being torn out of the socket.

Oppfinnelsen skal nå forklares nærmere under henvisning til tegningene som viser et ut-førelseseksempel av oppfinnelsen. The invention will now be explained in more detail with reference to the drawings which show an embodiment of the invention.

På tegningene viser The drawings show

Fig. 1 et perspektivriss av en rørklemmuffe, Fig. 1 a perspective view of a pipe clamp sleeve,

fig. 2 viser et halvsnitt gjennom rørklemmuffen, fig. 2 shows a half section through the pipe clamp sleeve,

fig. 3 viser et halvsnitt gjennom en mufferørforbindelse, fig. 3 shows a half section through a sleeve pipe connection,

fig. 4 viser et perspektivriss av en muffe-halvskål, og fig. 4 shows a perspective view of a socket-half cup, and

fig. 5 viser et perspektivriss av en låseklammer. fig. 5 shows a perspective view of a locking clip.

Som vist i fig. 1 er rørklemmuffens 1,2 halvskåler 11 og 12 spent slik sammen ved hjelp av respektive på de øvre og nedre halvdeler påskjøvne låseklammer 31,32 henholdsvis 33, 34, at tetningsmatten 2 er presset mellom de to halvskåler 11 og 12. For de to låseklammer 31,32 henholdsvis 33,34 er bragt i sine respektive endestillinger vil det mellom dem foreligge en aksial avstand omtrent svarende til 25% av en klammerlengde L, slik at man om nødvendig kan foreta korreksjon av presstrykket. Klemelementene 41,42,43,44 for oppnåelse av klemmuffeforbindelsens lengdekraftsammenholding er anordnet i sporene 51 henholdsvis 52, som er lukket mot skilleplanet 61,62 mellom halvskålene 11,12. As shown in fig. 1, the half cups 11 and 12 of the pipe clamp sleeve 1,2 are clamped together by means of locking clamps 31,32 and 33, 34 respectively pushed onto the upper and lower halves, so that the sealing mat 2 is pressed between the two half cups 11 and 12. For the two locking clamps 31,32 and 33,34 respectively have been brought to their respective end positions, there will be an axial distance between them approximately corresponding to 25% of a staple length L, so that if necessary, correction of the pressing pressure can be carried out. The clamping elements 41,42,43,44 for achieving the longitudinal force balance of the clamping sleeve connection are arranged in the grooves 51 and 52, respectively, which are closed against the dividing plane 61,62 between the half cups 11,12.

I fig. 2 er rørklemmuffen 1 vist i halvsnitt, med de to nedre lukkeklammere 31 og 32 i endestilling, mens de to øvre lukkeklammere 33 og 34 er under påskyving på rørmuffen 1 i pilretningen. In fig. 2, the pipe clamp sleeve 1 is shown in half section, with the two lower closing clamps 31 and 32 in the end position, while the two upper closing clamps 33 and 34 are being pushed onto the pipe sleeve 1 in the direction of the arrow.

Halvsnittet i fig. 3 viser den trykktette og lengdekraftsammenholdende rørklemforbind-else, hvor de to rørender 6,7 ligger overfor hverandre inne i muffelegemet 1 og holdes sammen på en lengdesammenholdt og tett måte ved hjelp av rørldemmuffen. Avtetnin-gen skjer ved hjelp av de i lengderetningen delte tetningsmatter 2a,2b som, slik det er vist i fig. 4, er lagt inn i et i skilleplanet 61,62 mellom halvskålene aksialt forløpende spor 63 og/eller er lagret inntrykket i et område 21,22. A betegner i fig. 3 den definerte avstand mellom låseklammerne 31 og 32, en avstand som utgjør omtrent 25% av klam-merlengden L, når låseklammerne er i sine endestillinger. Låseklammerne 31 og 32 er fortrinnsvis fremstilt av et armert plastmateriale og er på utsiden forsynt med avstivnin-ger 37. The half section in fig. 3 shows the pressure-tight and longitudinally cohesive pipe clamp connection, where the two pipe ends 6,7 lie opposite each other inside the sleeve body 1 and are held together in a longitudinally uniform and tight manner by means of the pipe sleeve. The sealing takes place with the help of the longitudinally divided sealing mats 2a, 2b which, as shown in fig. 4, is inserted into a groove 63 running axially in the dividing plane 61,62 between the half-cups and/or the impression is stored in an area 21,22. A denotes in fig. 3 the defined distance between the locking clips 31 and 32, a distance which makes up approximately 25% of the clip length L, when the locking clips are in their end positions. The locking clips 31 and 32 are preferably made of a reinforced plastic material and are provided with stiffeners 37 on the outside.

Fig. 5 viser den mot muffelegemet vendte overflate i en låseklammers 31,32,33,34 broområde 35. Denne overflate er fortsynt med en glideflate 36 for å lette påføringen av låseklammerne på muffelegemet. Fig. 5 shows the surface facing the muffle body in the bridge area 35 of a locking clip 31,32,33,34. This surface is provided with a sliding surface 36 to facilitate the application of the locking clips on the muffle body.

Claims

1. Clamping socket connection for whole pipes or such pipes which are composed of two half-pipes, such as cable duct pipes, repair pipes or the like, with a clamping socket (1) formed by one of two half-cups (11,12), which two half-cups (11,12) are placed around the pipe ends that must be connected and connected to each other by means of retaining clamps (31-34) acting with a wedge effect, with a sealing mat (2) being arranged between the tube ends and the clamping sleeve (1), characterized by the fact that from both axial clamping sleeve ends are two folding clamps (31,33 and 32,34) attached along the radially outer longitudinal sides of the half-shells (11,12) parting plane (61,62), which pair of retaining clips (31,33 and 32,34) in their respective end positions have a defined distance (A) that the holding clamps (31-34) along the inner circumference have on both sides of the sealing mat (2) towards the half-shell dividing plane (61,62) closed grooves (51,52), in which grooves clamping elements (41,43) are arranged, and that the clamp-socket connection is designed so that when the locking clamps (31 -34) are attached, the clamping elements (41,43) are tightened before the sealing mat is compressed.

2. Clamping sleeve connection according to claim 1, characterized in that in the end position the aforementioned distance (A) between the locking clips (31-32 and 33-34 respectively) constitutes approximately 25% of the locking clip length (L).

3. Compression sleeve connection according to requirement log2, characterized in that the sealing mat (2a,2b) in the separating planes (61,62) is stored in a recessed area (21-22).

4. Clamp connection according to one of the preceding claims, characterized in that a bridge (35) in the locking clamps (31-34) is designed with a dovetail shape, with an external stiffener (37), and with an internal sliding surface (36).

5. Clamp connection according to one of the preceding claims, characterized in that the locking clamps (31-34), the sealing mats (2a, 2b) and the half cups (11, 12) are made of plastic with different degrees of hardness.