SK148099A3 - Coupling sleeve provided with locking means for pipes connection - Google Patents

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

-Interior connection of the tubes by means of a faithful sleeve

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a clamp connection of pipes by means of a clamp for whole pipes or pipes composed of two half pipes, such as cable ducts, repair pipes or the like, with a clamp sleeve consisting of two half shells. the ends of the tubes to be joined and connected by holding clamps clamping the half-shells in a wedge-like manner and with a sealing mat arranged between the outer walls of the tube ends and the inner walls of the clamping sleeves.

BACKGROUND OF THE INVENTION

Such tubular sleeves consisting of two half-shells are already known. Thus, DE 78 33 835 discloses a pipe sleeve according to the concept of claim 1, in which a high-viscosity sealant is applied to the hollow space existing between the outside diameter of the pipe and the inside diameter of the sleeve part, as well as between the contact points of the two half shells.

These pipe clamps have proven themselves in practice and are used in large numbers in particular for sealing conduits of cable ducts. More recently, cable ducting technology has changed so completely, as now by using sliding oils to draw cables, that sealants are chemically attacked, thereby dissolving, and so leaks often occur very quickly. Furthermore, the viscosity of the sealants used has been shown to undergo severe fluctuations at extreme temperatures, so that they are either too soft or too strong.

EP 0650007 discloses another tubular sleeve consisting of two half-shells which eliminates these disadvantages. Here, a longitudinally divided sealing mat is inserted between the outer wall of the pipe to be sealed and the inner wall of the pipe sleeve, which is pressed into the grooves in both half-shells.

However, these known pipe clamps still need improvements. They are tight, but only to the extent of about 3 bars. This is not enough for many emerging applications. A further feature to be improved is the longitudinal closing force of such a collar connection. Indeed, it has been shown that in the new methods known today, the cable, in particular a long-length glass fiber cable, is laid into the duct channel under high pressure. In this case, it may happen that the cable is pulled out of the sleeve, for example when replacing parts during repairs, since the longitudinal closing force is not sufficient. If the sealing effect is insufficient, the pressure drop during cable entry can even prevent this method completely, despite the fact that in the operating state in deeper layers or in water, water penetrates into the conduit tube and can prevent the cable from being used as intended.

The object of the invention is to remedy these drawbacks. The invention, as described in the claims, provides a pipe connection by means of a sleeve which provides improved tightness up to about 10 bar and has the desired longitudinal closing force for the introduction of high pressure cables.

SUMMARY OF THE INVENTION

This is accomplished by a clamp clamp for whole pipes which consists of two pipe halves, such as cable ducts, repair pipes or the like, with a clamp clamp consisting of two half-shells, the two half-shells enclosing the ends of the pipes to be connected and connected by clamping clamps clamping the half-shells by a wedge-like action and with a sealing mat arranged between the outer walls of the pipe ends and the inner walls of the clamping sleeves according to the invention, which is based on two radially outer longitudinal sides retaining clips, starting from both axial ends of the clamping sleeves, that in their final position a distance between them is defined that the half-shells have along their inner circumference on both sides of the sealing mat against the separating planes The grooves are closed in the half-shells in which the clamping elements are arranged and that the clamping connection of the pipes by means of the clamping sleeve is designed so that the clamping elements are clipped before the sealing mat is pressed.

pipe joints or pipes

The advantages achieved by the invention are based in particular on the fact that by means of the increased sealing effect it is possible to inject medium under higher pressure into the cable duct tube, thereby enabling a modern method of blowing air or flooding to introduce larger cable lengths. a clamping force in the region of the sleeve connection of the tubes, so that the pulling of the ends of the tubes from the sleeve is safely prevented.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in more detail below with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of a clamp tube; FIG. 2 is a partial cross-sectional view of a pipe clamp; FIG. 3 is a partial cross-sectional view of a sleeve pipe connection; FIG. 4 is a perspective view of the sleeve half-shells; and FIG. 5 is a perspective view of a closure clip.

DETAILED DESCRIPTION OF THE INVENTION

The clamping collar essentially consists of two halves of the sealing couplings 31.32.33. and the tubes shown in the drawing are aligned in the half-shells 11 and 12, the mats 2a and 2b inserted therein, and the four closing 34 and clamping elements 41, 42, 43, 44.

As shown in FIG. 1, the two half shells 11 and 12 of the tubular clamp sleeve 1 are clamped to one another by means of the clamps 31, 32 and 33, 34, respectively, slid on its upper and lower halves two by compressing the mat 2 between the two half shells. If the two clamps 31, 32 and 33, 34 respectively are moved to their final position, an axial distance of about 25% of their length L remains between them so that, if necessary, the pressure pressure corrections can be made. Z faithful elements 41.42.43. 44 to achieve the longitudinal closing force of the clamp sleeve connection are arranged opposite the edge and the divider planes 61, 62 of the closed grooves 51 and 52 of the half-shells 11, 12, respectively.

Fig. 2 shows the tubular clamping sleeve 1 in partial cross-section, with the two lower closing clamps 31 and 32 already in their final position, but the two upper closing clamps 33 and 34 are moved in the direction of the arrows to the tubular clamping 1.

From the partial section of FIG. 3 shows a pressure-tight and longitudinally clamped clamp connection of the tubes in which the two tube ends 6 and 7 contact each other inside the sleeve body 1 and are joined together by a clamping tube sleeve and also with a sufficient longitudinal clamping force. The sealing takes place by means of an axially divided sealing mat 2a. 2b. which is, as shown in FIG. 4, inserted into the axial groove 63, extending in the splitting planes 61, 62 of the half-shells and is supported or is disposed in the region

21. 22 deepening. In FIG. 3, a defined distance A between the closing terminals 31 and 32, about 25% of the length L in the final position, is indicated. Closing clips 31 and 32 are preferably made of reinforced plastic and are externally provided with reinforcements 37.

Fig. 5 shows the surface of the region of the bridges 35 of the clutch closure 32, 33, 34 facing the sleeve body 1. This surface has a smooth surface 36 to facilitate the displacement of the closure clips onto the sleeve body.

Claims (5)

PATENT CLAIMS l.Connection of pipes by means of a clamp to the whole pipe or to pipes composed of two pipe halves, such as cable ducts, repair pipes or the like, with a clamp sleeve consisting of two half-shells, the two half-shells enclosing the ends of the pipes; to be joined and connected by clamping clamps clamping the half-shells by wedging action and with a sealing mat arranged between the outer walls of the pipe ends and the inner walls of the clamping sleeves, characterized in that two radially outer longitudinal sides of the separating planes between the two axial ends of the clamping end position, it remains between them that the half-shells have closed grooves along their sides on the split plane of the half-shells, in which the clamping elements are arranged and that the clamping connection of the By means of the clamping sleeve, it is made in such a way that, when the closing clamps are inserted, the clamping elements are switched on by pressing the sealing mat. The shells are against the clamps, starting from the sleeves, that in their defined spacing, the inner circumference after Pipe clamp according to claim 1, characterized in that, in the end position, the distance (A) between the closure clips (31, 32 and 33, 34) is about 25% of the length (L) of the closure clips. Clamping connection according to claim 1, characterized in that the sealing lip (2a, 2b) in the separation planes (61, 62) is mounted in the recessed area (21, 22). Clamping connection according to claim 1 and one of the following, characterized in that the bridge (35) of the closing clamps (31, 32, 33, 34) is in dovetail shape with an outer reinforcement (37) and an inner smooth surface (36). Clamping connection according to claim 1 and one of the following, characterized in that the clamping clips (31, 32, 33, 34), the sealing mats (2a, 2b) and the half-shells (11, 12) consist of plastics of different degrees hardness.