FI95091B - Pressure-tight sleeve - Google Patents

Abstract

In the case of a pressure-proof sleeve for connecting two cables having two half-shells, by means of which a cavity for splice reception is constructed, having transition pieces for the cable ends, which are placed on an inner cable sheath, and clips for clamping on the armouring wires or strain relief elements, it is provided that the transition pieces are constructed as corrugated tubes and are arranged over the conically constructed ends of the divided sleeve and the de- sheathed ends of the cable, that a first shrink-on collar is applied which extends over the sleeve and the corrugated tubes and closes sealingly against the inner cable sheath, that the strain relief elements are distributed over the circumference of the first shrink-on collar, that there are provided in each case at the ends of the cone and in the middle of the sleeve clips which non-positively connect the strain relief elements to the sleeve, and that a second shrink-on collar is applied over the entire structure.

Description

1 95091 β

Pressure-tight sleeve

The invention is a pressure-tight sleeve according to the type definition of claim 1. In cable joints 5 sleeves are used in both underground cables and submarine cables. They must keep moisture away from the joint of the sleeve for long periods of time and also when the temperature varies. They must be protected from the outside so that they are potentially corrosion-resistant. If the sleeve has a me-10 stable shell, this must be connected to the cable's n-conductor or the metal cable sheath or shield. The shell of the sleeve thus becomes contact-resistant and at the same time acts as an earth.

EP-A-0 071 482 discloses a sleeve connection 15 for an energy cable, in which the transition area of the sleeve body and the cable sheath is covered by a shrink tubing. The transition area of the cable and sleeve body forms a fitting cylinder consisting of a rigid steel or aluminum tube.

In the solution according to DE-U-6 605 680, the metal sheath and the sleeve body of the cable 20 are connected to each other by a waveguide soldered at one end to the metal sheath and at the other end to the sleeve body. Such soldering prevents access to the sleeve body.

The object of the invention is to provide a pressure-tight sleeve of the type described above, which guarantees protection against corrosion and pressure-tightness not by means of cable mass but by means of throttling rings.

The advantage of such a sleeve is that the joint is easier to reach in connection with the necessary repairs. It has been found that when using cable pulp, repairs cannot be carried out quickly, as it takes a lot of time to remove the pulp.

This object is solved in the case of the sleeve described above according to the invention by means of the features mentioned in the characterizing part of the claim. Preferred alternative embodiments of the invention 2 95091 are described in subclaims 2 and 3.

Areas of application of the invention include land and submarine cables, especially for telecommunications. The invention is preferably suitable for use in splices of optical fibers.

The advantage over the sleeves used so far is that the sleeve is easier to install and that in tele-games, especially LWL cables, the sleeve is easy to get into and repair can take place very quickly.

An embodiment of the invention will now be considered with reference to the drawing. The figure shows a sleeve body 1 consisting of two half-shells, which connects the ends of the sleeve to the cable ends by means of conical bodies 3 at their ends and metal sheaths formed on them, formed as a corrugated sheath 4. The corrugated sheaths 4 then act as deflection protection. At the ends 12 of the cables, the sheath is stripped off, and the strain relief elements 8 are evenly distributed on both sides on the outer circumference of the sleeve. During installation, the first choke ring is first pushed over the peeled ends and the aal-20 sheaths and the sleeve body, and the sleeve shells are slidably pressed against each other at the end of the installation of the extension joint. In submarine cables, the strain relief elements consist of reinforcing wires that are unloaded over a distance of about 1.5 m. The strain relief elements extending on both sides over the sleeve-25 body are fastened to each other and to the sleeve by means of three fasteners 5, 6, 7. The middle fastener presses the strain relief elements 8 into a recess 10 which rotates the sleeve and which serves to fasten the strain relief elements against the sleeve body 30. This is done at this point by tightening the fastening; 5, since the strain relief elements must then follow the contours of the recess, resulting in a particularly strong joint.

The sleeve is formed laterally as a sliding member by means of a strip running along the dividing line of the sleeve-35 shells, li 3 95091 formed overlapping with the adjacent counter-shell. This bar is not illustrated in the drawing. The bar may comprise projections on the side of the second shell, while on the opposite side of the shell there are recesses for fixing the shells also in the direction of the axis 5. However, the conical shape alone considerably limits the possibility of axial sliding. A gasket made of rubber-elastic material can be placed between the shells.

The tensile strength of the tensile strength of the invention and the pressure-tight sleeve 10 is high regardless of the shape of the cable, because the reinforcement is reinforced over the entire cross-sectional area of the sleeve. The sleeve preferably consists of connectors formed of metal as well as corrugated tubes, which ensure a flexible connection to the sleeve. The sleeve can be used especially as a repair sleeve in destroyed cables.

The preferred area of application for the sleeve is inland lake cables, but also submarine cables laid on a continental shelf, since the sleeve in any case has pressures up to 30 bar and achieves at least 90% of the tensile strength of the cable.

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Claims (3)

1. Pressure-tight sleeve for joining two of two half-shell-resistant cables, the half-shell forming a 5 hollow space for the joint, comprising reducers (4) for the cable ends (2), which are peeled all the way to the innermost cable jacket, and clamps (5, 6 , 7) for clamping reinforcing trees or tension relief elements (8), characterized in that the reducers (4) 10 consist of corrugated pipes and are arranged around the conically arranged ends (3) of the split sleeve (1) and on the peeled the cable ends (2), and provided therewith a first throttle ring (9) which extends over the sleeve (1) and the corrugated pipes (4) and seals tightly against the innermost cable sheath, and that the tension relief elements are distributed on the first the outer periphery of the throttle ring, and that the ends of the cone (3) and the middle part of the sleeve (1) are provided with respective clamps (5, 6, 7) which firmly secure the tension relief elements (8) in the sleeve (1), and that a second 20 groove (11) is provided on this entire structure. Pressure-proof sleeve according to claim 1, characterized in that the sleeve (1) consists of shells which can be pushed against each other. Pressure-tight sleeve according to claim 1 or 2, characterized in that a recess (10) is arranged in the center of the sleeve body around its outer periphery. • • t Λ Λ »