CZ4818U1 - Blowing means for optical cables - Google Patents

Description

(54) Utility model name:

Inflatable jig for optical cables

CZ 4818 Ul

Inflatable jig for optical cables

Technical field

The technical solution relates to an inflatable jig for optical cables.

BACKGROUND OF THE INVENTION

Successful laying of the cable by the blowing method depends mainly on such factors as the properties of the optical cable, the design of the protective cable pipe of the optical cable and the course of the route. Commonly laid cables have a diameter of 10 to 20 mm at a weight of 0.1 to 0.3 kg / m, the length of blowing depending on both the weight of the cable and its diameter and on the rigidity.

The prior art inflatable devices are only able to install tension-sensitive optical cables into the protective cable ducts in limited lengths by means of compressed air. For example, a device is known comprising a compressed air connection piece with a speed lock, a lubricant tank, a pressure regulator, a length and speed electronic evaluation block and a filter-water separator and an inflation piston. The construction is made of aluminum profiles. The integrated compressed air connection piece consists of a housing and split seals, which enclose the optical cable almost hermetically. In some embodiments, the front of the compressed air connection piece is adapted to accommodate adapters for different pipe diameters. The lubricant tank can be applied to the cable using a manually adjustable valve to reduce frictional resistance. The optical cable is blown into the protective tube by moving the inflatable piston fixed at its end with compressed air from the compressor by passing compressed air through the integrated pressure regulator to the connection piece in which it acts on the inflation piston that pulls the optical cable into the protective tube . The blow rate can be controlled by pressure control. The evaluation electronics block indicates the blown cable length and blowing speed. The disadvantage of this device is that after blowing a certain length of the optical cable about 2 km the clogging must be interrupted because the cable is already stressed by a force that can damage it. To avoid this, these devices are equipped with means for measuring the strain on the optical cable. This increases the safety of blowing, but at the same time it becomes complicated.

The purpose of the technical solution is to allow the optical cable to be blown with longer lengths than the existing devices allow by means of a device that is as simple as possible and not demanding on the operator.

The essence of the technical solution

These drawbacks are largely eliminated by the optical cable inflatable device consisting of a plurality of spacer inflatable rings and a removable longitudinally divided through bush having a threaded hole for compressed air supply, with the removable longitudinally divided through bush on its ends

4818 U1 sockets in which the split sealing rings are disposed and one of the sockets of the removable longitudinally divided through bushing is provided with a thread for the coupling nut and a clamping ring to secure the protective cable tube in the removable longitudinally divided through bush.

The device according to the invention enables easy blowing of the optical cable into the optical tube. Furthermore, the design of the jig allows the use of any number of spacers to replace the piston drive, and evenly distributing the tensile force of the flowing air will provide better blowing results at lower compressor performances, eliminating the known looping.

For proper operation of the jig it is advantageous that the spacer ring assembly is threaded on the optical cable before insertion into the jig.

In order to ensure a perfect seal, it is advantageous if the contact surfaces of the removable longitudinally divided through bush are ground.

For mounting the protective tube in the jig, it is also advantageous that a support surface is provided within the removable longitudinally divided through bushing for supporting the end of the protective cable tube in the removable longitudinally divided through bushing, which facilitates fixation of the tube by the coupling nut and clamping ring in the sleeve.

Overview of the drawings

The technical solution will be explained in more detail with the help of the drawing in which Fig. 1 shows the fixture according to the technical solution with the optical cable inserted and fixed in the protective tube.

Examples

The jig according to FIG. 1 comprises a system of spacers 2 and a removable longitudinally divided through bush 2, the contact surfaces 9 of which are ground. Detachable longitudinally split housing 2 through an opening 2 of the compressed air which is formed a thread 2 P ^ro connecting the compressed air supply. Inside the removable longitudinally divided through-sleeve 2, a support surface 10 is provided to support the protective cable tube 11. The removable longitudinally-divided through-sleeve 2 is further terminated at both ends with sockets 5, one of these sockets 5 having a thread 2 for a coupling nut 14; a clamping ring 15 for fastening the protective cable tube 11 in the removable longitudinally divided through bushing 2. In one piece, the removable longitudinally divided through bushing 2 is connected by screws 12.

For blowing, the removable longitudinally divided sleeve 2 is mounted at the end of the protective tube so that the protective tube 11 is supported on the abutment surface 10 in the removable longitudinally divided through sleeve 2 and fixed against displacement by clamping ring 15 and coupling nut 14 in thread 2. 5. Op-2E 4818 The U-cable 12 with one spacer ring 1 mounted on it by means of insulating tape 7 is inserted into the protective cable pipe 11 in a removable longitudinally divided through bush 2. The other spacer rings 1 are loosely mounted on the optical cable 12 The split sealing rings 6 seal both the optical cable 12 and the protective cable pipe 11 of the optical cable 12 in the sockets 5 of the removable longitudinally divided through bush 2. After introduction of the compressed air through the opening 2 of the compressed air supply, the optical the cable 12 is blown into the protective cable tube 11, wherein the spacer ring 1 fixed on the optical cable 12 functions as a piston. After blowing approx. 500 m of optical cable 12, the detachable split through bush 2 is disassembled on the optic cable 12 and a further spacer ring 1 is fixed in front of the mouth of the protective cable tube 1. After folding the detachable split through bush 2 as described, Due to the construction of the removable longitudinally divided through bush 2 and the use of spacer inflatable rings 1, it is possible to blow substantially longer cable lengths without the cable 12 being unduly stressed.

Industrial applicability

The device according to the invention can be used wherever it is necessary to install tension-sensitive cables in the protective cable pipes gently by means of compressed air.

Claims (4)

PROTECTION REQUIREMENTS An optical cable inflating device, characterized in that it comprises a set of spacers (1) and a removable longitudinally divided through bush (2) provided with a threaded bore (3) (4), wherein the removable longitudinally divided the passage sleeve (2) is terminated at its ends by sockets (5) in which the split sealing rings (6) are arranged, and on one of the sockets (5) of the removable longitudinally divided sleeve (2) is a thread (8) for the coupling nut; a clamping ring (15) for fastening the protective cable tube (11) in a removable longitudinally divided through bush (2). An optical cable inflatable device according to claim 1, characterized in that the spacers assembly (1) is threaded on the optical cable (12). Optical cable inflatable device according to claim 1, characterized in that the contact surface (9) of the removable longitudinally divided housing (2) is ground. -3GB 4818 U1 Optical cable inflating device according to claim 1, characterized in that a support surface (10) is formed inside the removable longitudinally divided through bush (2) for supporting the protective cable tube (11).