CN201408154Y - An indoor optical cable repeated bending test equipment - Google Patents

Abstract

The utility model relates to an indoor optical cable repeated bending test equipment, which comprises a frame and a swing rod. The swing end of the swing rod is provided with an upper clamp, and the frame is provided with a counterweight slide block which can slide vertically. A lower fixture is provided, and both upper and lower fixtures include base plates with symmetrical shapes. A winding wheel is fixed on the symmetrical line of the base plate, and a winding groove is arranged on the circumference of the winding wheel. A pressing device and a guide device are provided. The guide device is provided with an arc-shaped wire groove. The symmetry line of the substrate intersects the axis of the winding wheel perpendicularly. The plane formed by the axis of the wire wheel is tangent; when the swing rod is in the vertical direction, the tangent surface between the bottom surface of the arc-shaped groove of the guide device of the upper fixture and the bottom surface of the arc-shaped groove of the guide device of the lower fixture is a vertical plane, ensuring The clamping effect of the indoor optical cable during the test avoids damage to the optical cable at the clamping part, making the experimental data accurate and effective.

Description

An indoor optical cable repeated bending test equipment

technical field

The utility model relates to optical cable detection equipment, in particular to an indoor optical cable repeated bending test equipment.

Background technique

The current optical cable repeated bending test equipment is designed for the characteristics of outdoor optical cables. As shown in Figure 1, it includes a frame 1 and a swing rod 3. The end of the transmission device 8 of the driving device 2, the driving device 2 drives the swing rod 3 to swing back and forth at an equal angle on a vertical plane with the end of the transmission device 8 as the swing fulcrum; The vertical slide rail 10 fixed on the frame 1 is slidably equipped with a counterweight slider, and a pair of curved rails fixed on the frame are arranged between the counterweight slider and the swing fulcrum The test wheel 6 is equipped with an upper clamp 11 on one side of the swing end of the fork 3, and a lower clamp 12 is fixedly installed on the counterweight slide block. During the test, the two ends of the optical cable sample 9 are respectively fixed on the upper and lower fixtures, the middle part of the optical cable sample 9 passes through the bending test wheel 6, the optical cable between the two fixtures is in a tensioned state, and the weight is used to slide the tension The block 7 is suspended in the air, and the mutual position of the upper and lower clamps and the bending test wheel should ensure that when the swing bar is in the vertical position, the optical cable sample 9 is in the vertical state. When working, the motor 2 drives the pendulum 3 to reciprocate at equal angles left and right. The optical cable sample 9 is repeatedly bent at the bending test wheel 6. During the repeated bending process, the lower fixture 12 slides up and down slightly. The performance of the optical cable sample 9 is tested, and then the corresponding mechanical properties of the tested optical cable are analyzed.

The ideal test state is that in the test process, the optical cable sample 9 only changes the structural performance of the tested part of the optical cable, and the clamping part of the optical cable sample 9 should keep the structural performance intact. Both the upper and lower clamps are suitable for clamping the outdoor optical cable. The sheath layer of the outdoor optical cable has a layer of metal support. It is relatively easy to clamp the optical cable, as long as it is pressed tightly, and it is not easy to damage the optical fiber inside. At present, the upper fixture 11 and the lower fixture 12 in the optical cable repeated bending test equipment are composed of two splints. One end of the two splints is connected together and can rotate around a fixed shaft. There is an arc-shaped groove at the center line of the two splints. The positions of the two arc-shaped grooves correspond to each other. During the test, place one end of the optical cable between the two grooves. For non-circular cables or optical cables with particularly small diameters, they need to be tightly packed with a bag before placing them. Close the two splints, and finally fix the two splints with fixing bolts. Fixed clamping, the clamping of the optical cable style is realized through the splint; the other end of the optical cable is clamped and fixed by the same device, and a certain counterweight is added under the device to tension the optical fiber.

In order to meet the requirements of laying and use, for the consideration of environmental protection and lightning protection, the indoor optical cable usually does not put metal parts in the optical cable, so the indoor optical cable is very soft, the outer diameter is very thin, the outer sheath is also soft, and the wall thickness is thinner. In order to ensure the quality of production, it is also necessary to test its mechanical properties. If the indoor optical cable is clamped by the direct compression method of the current outdoor optical cable, it will cause the optical cable to be flattened and deformed, and even the optical fiber will be broken; moreover, the outer sheath of the indoor optical cable is mostly made of soft materials. If the test is carried out, the outer sheath of the optical cable will have a certain elongation, and the part of the outer sheath after clamping will bend in a wave shape, and the inner fiber core will also bend accordingly, so that the attenuation of the entire optical cable before the test is equal to Large, resulting in inaccurate test data for the final measurement. What is more serious is that the current clamping method is difficult to grasp the tightness of the clamping, the operation is difficult and the clamping force is not easy to control. If the clamping force is not enough, the optical cable will slip and cannot be clamped. If the clamping is too large, the optical cable is easy to Pinched flat, causing increased attenuation.

Utility model content

The purpose of this utility model is to provide an indoor optical cable repeated bending test equipment to ensure the clamping effect of the indoor optical cable during the test, avoid damage to the optical cable at the clamping part, and make the experimental data accurate and effective.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an indoor optical cable repeated bending test equipment, including a frame and a swing rod, the swing end of the swing rod is provided with an upper clamp, and the frame is equipped with a vertical Sliding counterweight slider, the counterweight slider is provided with a lower fixture, the upper and lower fixtures include a symmetrical base plate, a winding wheel is fixed on the symmetrical line of the base plate, and a winding wheel is provided on the circumference of the winding wheel Groove, the substrate is provided with a pressing device and a guide device radially outside the reel, the guide device is provided with an arc-shaped wire groove, the symmetry line of the substrate intersects the axis of the reel perpendicularly, and in the lower fixture The bottom surface of the arc-shaped groove on the guide device is tangent to the plane formed by the symmetry line of the base plate and the axis of the winding wheel. The tangent plane of the bottom surface of the device arc groove is a vertical plane.

The pressing device includes a base with a U-shaped opening structure, one side of the U-shaped opening of the base is connected to the base plate, and the other side is provided with a threaded through hole, and a pressing screw is screwed in the threaded through hole.

As a further optimization, a rubber gasket is provided on the side wall of the U-shaped structure facing the end of the compression screw; the shape of the symmetrical base plate is a rectangle.

In the utility model, after the indoor optical cable is fixed by the pressing device, it is wound several times on the winding wheel, and then the outgoing direction of the indoor optical cable is limited by the guiding device. The force required for fixing the indoor optical cable in the upper and lower clamps is mainly determined by the winding The friction between the wheel and the winding indoor optical cable is provided, and the pressing device only needs to use a small pressing force to press the indoor optical cable, so it will not cause damage to the indoor optical cable; the arc groove on the guide device in the lower fixture The bottom surface of the groove is tangent to the plane formed by the symmetry line of the base body and the axis of the winding wheel. After such a lower fixture is installed on the vertical counterweight slider, the direction of the synthetic external force on the lower fixture is basically stable during use. The plane formed by the symmetry line of the base body and the axis of the winding wheel is vertically downward, which ensures that the counterweight slider can slide smoothly and flexibly in the vertical slide rail when the fixture is driven by the optical cable to move vertically during the experiment , which reduces the sliding resistance, thereby avoiding damage to the optical cable caused by the resistance causing the cable to stretch. In addition, the pressing device adopts the threaded through hole and the pressing screw to cooperate. In use, the fixing pressure can be adjusted according to the difference of the indoor optical cable, which is flexible and convenient to use; Used together, the frictional force of the clamping device to fix the optical cable is increased, and at the same time, it protects the glass core of the fixed part of the indoor optical cable.

Description of drawings

Fig. 1 is the schematic structural diagram of existing optical cable repeated bending test equipment;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is the structural representation of lower fixture;

Fig. 4 is a left side view of Fig. 3 .

Detailed ways

As shown in Figure 2, Figure 3 and Figure 4, the indoor optical cable repeated bending test equipment of the present embodiment comprises a frame 1, a rotating motor 2 is arranged on the frame, a swing rod 3 is arranged on one side of the frame 1, and a rotating motor 2 and the swing rod 3 are connected through a transmission device 8, and one end of the swing rod 3 is provided with an upper clamp 4, and a slide rail device 10 is installed on the frame wall on the same side as the swing rod 3, and the counterweight slider of the slide rail device 10 A lower fixture 5 is provided, and the two ends of the optical cable pattern 9 are clamped by the upper fixture 4 and the lower fixture 5 respectively, and the position of the optical cable pattern 9 is limited by a pair of test guide wheel devices 6, and a counterweight 7 is provided under the counterweight slider , when the fork 3 was in the vertical direction, the tangent plane between the bottom surface of the guide arc groove of the upper clamp 4 and the bottom surface of the guide arc groove of the lower clamp 5 was a vertical plane.

The lower clamp 5 comprises a rectangular substrate 51 in shape, on which a pressing device 54, a reel 52 and a guide 53 are successively fixed longitudinally, the circumference of the reel 52 is provided with a winding groove, and on the guide 53 An arc-shaped wire groove is provided, and a pressing device 54 and a guide device 53 are arranged on the radially outside of the reel 52 on the base plate 51, and the symmetry line of the base plate 51 intersects perpendicularly with the axis of the reel 52; The bottom surface of the groove is tangent to the plane formed by the line of symmetry of the base plate 51 and the axis of the winding wheel 52 .

The pressing device 54 includes a base 542 with a U-shaped opening structure, one side of the U-shaped opening of the base is connected to the base plate 51, and the other side is provided with a threaded through hole, and the threaded through hole is internally screwed with a pressing screw 541 A rubber gasket 543 is provided on the side wall of the U-shaped structure facing the end of the compression screw 541 .

After the optical cable pattern 9 is slightly fixed by the pressing device 54, it is wound five times in parallel on the winding wheel 52, and the friction force generated by the winding is used to cooperate with the pressing device 54 to realize the clamping and fixing of the optical cable pattern 9.

The structure of the upper clamp 4 and the lower clamp 5 is the same. In practical applications, since the quality of the clamp 54 itself is small, its position has little influence on the performance of the upper clamp in the system, so the position of the clamp 54 can be adjusted. Adjustment.

In this embodiment, the side surface of the guide device 53 is an arc-shaped surface, of course, it can also be other arc-shaped surfaces, such as an elliptical arc-shaped surface.

In this embodiment, the compression device 54 is fixed by the cooperation of the compression seat 542 and the compression screw 541 , of course, other compression methods, such as elastic clamping, can also be used for fixing.

In the present embodiment, the number of turns that the indoor optical cable is wound on the reel 52 is five, and it can be arbitrarily adjusted as needed, for example, for further reducing the tension on the indoor optical cable at 54 places of the pressing device, the number of turns can be for ten laps.

Claims (4)

1. An indoor optical cable repeated bending test equipment, comprising a frame and a swing rod, the swing end of the swing rod is provided with an upper fixture, and the frame is correspondingly provided with a counterweight slider that can slide vertically, and the counterweight slider is provided with There is a lower clamp, which is characterized in that: both the upper and lower clamps include a symmetrical base plate, a winding wheel is fixed on the symmetrical line of the base plate, a winding groove is provided on the circumference of the winding wheel, and the winding wheel is fixed on the base plate. A pressing device and a guiding device are arranged on the radially outer side, and an arc-shaped wire groove is arranged on the guiding device. The plane formed by the line of symmetry of the base plate and the axis of the winding wheel is tangent to the plane formed by the axis of the winding wheel. When the swing bar is in the vertical direction, the bottom surface of the arc-shaped groove of the guide device of the upper fixture is tangent to the bottom surface of the arc-shaped groove of the guide device of the lower fixture. for the vertical plane. 2. The indoor optical cable repeated bending test equipment as claimed in claim 1, characterized in that: the upper fixture includes a base with a U-shaped opening structure, one side of the U-shaped opening of the base is connected to the substrate, and the other A threaded through hole is provided on the side, and a compression screw is screwed in the threaded through hole. 3 . The indoor optical cable repeated bending test equipment according to claim 2 , wherein rubber gaskets are provided on the side walls of the U-shaped structure facing the ends of the compression screws. 4 . 4. The indoor optical cable repeated bending test equipment according to claim 1, 2 or 3, characterized in that: the shape of the substrate is rectangular.

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