RU2309109C1 - Device for winding fiber-optic cablke on carrying wire - Google Patents

Abstract

FIELD: electric power lines.

SUBSTANCE: invention relates to air laying of fiber-optic cables, particularly, to devices for winding fiber-optic cable on carrying wire, including devices for winding fiber-optic cable onto current-carrying wire or overhead ground-wire cable of power line. Proposed device for winding fiber-optic cable on carrying wire contains frame coupled with rotary drive found outside the frame and made for rotation around carrying wire, and reel for winding fiber-optic cable installed inside frame for rotation square to axis of rotation of frame. With device moving along carrying wire, fiber-optic cable is wound off reel and is wound on carrying wire at definite pitch along spiral. Reel is made in form of two drums secured on common shaft symmetrically relative to carrying wire, shaft being fastened by ends of frame from inner side. Fiber-optic cable is wound on both drums and transitions of fiber-optic cable from one drum to the other are provided so that angle between point of slipping of fiber-optic cable from one drum and point of getting of fiber-optic cable onto other drum in projection onto plane perpendicular to axis of rotation of reel is approximately 180 degrees. Inner walls of drums are provided with cutouts of definite form with rounded off edges which provide smooth winding off of fiber-optic cable when changing over from one drum to the other, and radius of curvature of fiber-optic cable not less than critical radius of vending of fiber-optic cable. Tensioner is used to maintain required tension of fiber-optic cable being wound on carrying wire. To kill jerks of fiber-optic cable when changing over from one drum to the other, spring jerk damper is used. To preclude rotation of rollers through which drive rests on carrying wire, around carrying wire balancer is used being attached to rotary drive.

EFFECT: provision of reliable and quick winding of fiber-optic cable.

11 cl, 4 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of aerial laying of fiber optic cables (FOC) and, in particular, to devices for winding a FOC on a carrying wire, including devices for winding a FOC on a current-carrying wire or lightning cable of an overhead power transmission line (LEP).

State of the art

The standard and most common technologies for laying a wok over an overhead power line are suspension of a dielectric self-supporting optical cable and replacing a ground wire with a ground wire with an integrated optical cable. However, these technologies are inconvenient or practically not applicable for transmission lines of low and medium voltage classes. In particular, on a power transmission line of voltage up to 35 kV inclusive, in most cases there is no lightning cable and the addition of a lightning cable with an integrated optical cable is impossible. Self-supporting optical cable often does not fit into the design of power lines, reduces its reliability due to additional wind and ice loads. In many countries, the use of self-supporting optical cable is prevented by another problem - vandalism. A self-supporting optical cable, suspended at a small height on the poles of power lines, looks like a cable with copper pairs and often becomes the subject of theft. Other technologies for laying a wok over an overhead power line (replacing a current-carrying wire with a current-carrying wire with an integrated optical cable, attaching the optical cable to the carrier wire with special clamps or tape, etc.) is rarely used because of its high cost and for other reasons.

An effective alternative to replacing a ground wire or using a self-supporting wok is the technology of winding a thin optical cable onto a current-carrying wire or ground wire of a power transmission line. This technology can be used on power lines of low, medium and high class voltages.

The installation of fiber optic cable by the method of winding can be performed using a universal winding machine.

For this type of installation, specialized devices have been developed - winding machines (see DE 3702781 A1, 08/11/1988 and DE 3228227 C2, 02/02/1984). Their principle of operation is as follows: one mechanism (traction) allows the device to move evenly along the cable, the second mechanism (winding) in this case rotates the drum mounted on the machine with a cable construction length around the cable. Fiber optic cable is simultaneously unwound from the drum and wound onto a cable.

Before the passage of the next passage on the supports, special bridges are strengthened, necessary for preparing the mechanisms for work.

The winding machine rises to the support and hangs on the cable with a towing device in the direction of movement. A drum with a cable is installed on the machine. In places of approach to the support, the cable is fixed with a special clamp, which prevents it from unwinding from the cable.

After that, the traction and winding devices are started. The construction length of the cable is wound on the span between the two supports.

When the winding machine approaches the next support, the cable is again fixed with a clip that prevents it from unwinding, after which the machine is dismantled and can be used on the next span.

On the support itself, the cable is fixed on both sides by anchor clamps.

Improving the design of machines for winding fiber optic cable allowed to create a device disclosed in RU 21315 U1, 01/10/2002 and which is the closest analogue of the claimed invention. A device for aerial laying of fiber-optic cable (FOC) on a carrier wire contains two coils designed for winding FOCA and connected with a rotation drive, while the coils are mounted on the shaft with the possibility of joint rotation and are located symmetrically relative to the carrier wire, FOCA is wound on both coils while the transition was made wok from one coil to another.

The objective of the claimed invention is to provide a device that provides reliable and fast fastening of a fiber optic cable on a current-carrying wire or ground wire of an overhead power line.

SUMMARY OF THE INVENTION

The technical result of the claimed invention is achieved using a device for winding fiber optic cable (FOC) on a carrier wire containing a frame associated with a rotation drive that is located outside the frame, and configured to rotate around the carrier wire, and a coil for winding FOCA installed inside the frame with the possibility of rotation perpendicular to the axis of rotation of the frame.

In one of the embodiments of the invention, the coil is made in the form of two drums rigidly mounted on a common shaft and spaced symmetrically relative to the carrier wire, while the shaft is fixed at its ends on the frame from the inside.

In another embodiment of the invention, the wok is wound on both drums, while the transition of the wok from one drum to another is made in such a way that the angle between the point of departure of the wok from one drum and the point of entry of the wok to the other drum, in projection onto a plane perpendicular to the axis of rotation coil, is 180 degrees. In this case, the length of the wok section between the vanishing point from one drum and the entry point to another drum is approximately equal to half the circumference of the drum.

In yet another embodiment of the invention, the inner walls of the drums (“cheeks”) have special cutouts with rounded edges that ensure smooth wok winding when moving from one drum to another and guarantee a bend radius of the wok no less than the critical bend radius of the wok.

In one embodiment of the invention, the rotation drive, which is located outside the frame, provides the translational movement of the frame into the rotational movement of the frame so that when moving along the main wire, the frame with a coil installed inside it rotates around the main wire.

In another embodiment of the invention, the device for winding the wok additionally contains a weight attached to the frame and designed to maintain a given tension of the wok. The wok passes through the weighting device, on the one hand, the weighting device provides the wok tension necessary for laying the woks on the supporting wire, and on the other hand, the woker tensioning the woks in the section between the heavy weight and the coil is no more than necessary for winding the woks from the coil.

In one embodiment of the invention, the device for winding the wok includes a back support, and the device for winding the wok relies on a supporting wire with two points: the rollers of the drive rotation and the rear support.

In one embodiment of the invention, the rear support is made in the form of a system of rollers mounted on the frame with the possibility of rotation relative to the frame in a plane perpendicular to the axis of rotation of the frame, while the center of gravity of the device is located below the point of contact with the rear support of the carrier wire.

In another embodiment of the invention, the rear support is made in the form of a sleeve mounted on the frame, while the carrier wire passes inside the sleeve, and when the device moves along the carrier wire, the sleeve slides along the carrier wire.

In yet another embodiment of the invention, the wok wound device further comprises a springy jerk absorber designed to dampen the wok jerks when switching from drum to drum.

In yet another embodiment of the invention, the wok winding device further comprises a balancer mounted on a rotation drive that prevents rotation of the rollers by which the rotation drive rests on the carrier wire around the carrier wire when the device moves along the carrier wire.

Brief Description of the Drawings

Figure 1 shows a device for winding a wok on a carrier wire, top view.

Figure 2 presents a device for winding a wok on the supporting wire, side view.

Figure 3 presents the coil, a top view.

Figure 4 presents the coil, side view.

DETAILED DESCRIPTION OF THE INVENTION

A device for winding a wok on a carrier wire, shown in figure 1, 2, contains the following main structural elements:

- frame 1 associated with the rotation drive 4,

- a coil 2 mounted inside the frame 1 with the possibility of rotation,

- back support 6,

- heavy 5,

- springy damper jerk 8,

- balancer 9.

The frame 1 is supported on the supporting wire 7 at two points - by the rollers of the rotation drive 4 and the rear support 6. The frame 1 is driven along the supporting wire 7 either from the ground using a tow rope or using a special tractor (the tractor can be mounted on a supporting wire in front of the device, and the traction of the tractor can be transmitted to the device by means of a hitch). A coil 2 is installed inside the frame 1, which can rotate freely on the shaft, and the coil shaft is fixed at its ends on the frame from the inside. The rotation drive 4 provides the translational movement of the frame 1 in the rotational movement of the frame 1 so that when moving along the main wire 7, the frame 1 with the coil 2 installed on it rotates around the main wire 7.

Coil 2 is made in the form of two drums rigidly mounted on a common shaft and spaced symmetrically relative to the carrying wire 7. The wok is wound on both drums to maintain balancing of the device when moving along the bearing wire 7. When wok is wound on the drums, wok transitions from one drum to another are performed , so that the angle between the point of departure of the wok from one drum and the point of entry of the wok to another drum, in the projection onto a plane perpendicular to the shaft of the coil, is 180 degrees, Fig.3, 4. In this case, the inner walls of the drum s ( "cheeks") 10 has special recesses S1 and S2 with rounded edges which provide a smooth coiling FOC when changing from one reel to the other and provide bend radius EQA no less than the critical bend radius of the EQA. In this case, the length of the wok section between the vanishing point from one drum and the entry point to another drum is approximately equal to half the circumference of the drum.

When moving along the main wire 7, the frame 1 with the coil 2 installed on it rotates around the main wire 7, as a result of which the wok is wound off the coil 2 and spirals onto the main wire 7 with a certain winding pitch. In this case, the wok is wound alternately from different drums, which minimizes the displacement of the center of gravity of the device when it moves along the supporting wire 7.

To maintain the specified tension of the wok when winding on the supporting wire 7 in the inventive device uses a weight 5.

The weight 5 is a system of rollers, which ensures the maintenance of the specified tension of the wok when wound wok on the supporting wire. The wok passes through the weighting device, on the one hand, the weighting device provides the wok tension necessary for laying the woks on the supporting wire, and on the other hand, the woker tensioning the woks in the section between the heavy weight and the coil is no more than necessary for winding the woks from the coil. The tractor is fixed on the frame and when the device moves along the carrier wire rotates around the carrier wire together with the frame. When moving in the opposite direction (rollback), the heavier also maintains the specified wok tension, choosing a surplus wok.

The rear support 6 can be made in the form of a system of rollers, which can be mounted on the frame with the possibility of rotation relative to the frame in a plane perpendicular to the axis of rotation of the frame, or in the form of a sleeve mounted on the frame so that the carrier wire passes inside the sleeve.

In addition, to suppress jerks of the wok during the transition from drum to drum, a special additional device is used - a springy damper of jerks 8.

In addition, to prevent rotation of the rollers, which the rotation drive rests on the carrier wire, a special additional device is used around the carrier wire when the device moves along the carrier wire - a balancer 9 mounted on the rotation drive.

Claims (11)

1. A device for winding a fiber optic cable (FOC) onto a carrier wire containing a frame associated with a rotation drive and configured to move along the carrier wire and rotate around the carrier wire, and a FOC coil for winding mounted inside the frame to rotate perpendicular axis of rotation of the frame, while the coil is made in the form of two drums rigidly mounted on a common shaft and spaced symmetrically relative to the carrier wire, and the wok is wound on both drums, while the wok transitions are made from one drum to another, in which the rotation drive provides the translational movement of the frame into the rotational movement of the frame so that when moving along the main wire the frame with the coil installed inside it rotates around the main wire, while when the device moves along the main wire, the FOC is alternately wound with drums and spiral spirals onto the supporting wire, and the angle between the wok vanishing point from one drum and the wok entering point on another drum, in projection onto a plane perpendicular to the roll shaft ki is approximately 180 °. 2. The device according to claim 1, characterized in that the inner walls of the drums have cut-outs with rounded edges, which ensure smooth winding of the wok during the transition from one drum to another and guarantee a bending radius of the wok no less than the critical bending radius of the wok. 3. The device according to claim 2, characterized in that the length of the wok section between the vanishing point from one drum and the entry point to another drum is approximately equal to half the circumference of the drum. 4. The device according to claim 1, characterized in that it further comprises a weighting unit mounted on a frame that maintains a specified wok tension, wound on the carrier wire, and provides a wok tension between the weight and the coil no more than is necessary for winding the wok from the coil. 5. The device according to claim 4, characterized in that the heavier is configured to maintain a predetermined wok tension, wound on the carrier wire, also when the device stops and when the device rolls back. 6. The device according to claim 1, characterized in that it contains a rear support. 7. The device according to claim 6, characterized in that the rear support is made in the form of a system of rollers mounted on the frame with the possibility of rotation relative to the frame in a plane perpendicular to the axis of rotation of the frame. 8. The device according to claim 7, characterized in that the center of gravity of the device is located below the point of contact by the system of rollers of the carrier wire. 9. The device according to claim 6, characterized in that the rear support is made in the form of a sleeve mounted on the frame, while the carrier wire passes inside the sleeve, and when the device moves along the carrier wire, the sleeve slides along the carrier wire. 10. The device according to claim 1, characterized in that it further comprises a springy jerk absorber designed to dampen the wok jerks when switching from drum to drum. 11. The device according to claim 1, characterized in that it further comprises a balancer mounted on a rotation drive, designed to prevent rotation of the rollers, which the rotation drive relies on the carrier wire around the carrier wire when the device is moving along the carrier wire.

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