An optical fiber excess length cutting test bench device

Abstract

The present invention discloses a fiber excess length cutting test bench device in the technical field of fiber processing and detection equipment, comprising a test seat, a V-shaped positioning groove, and a cutting mechanism, wherein the cutting mechanism comprises two brackets, two linear drive elements, two mounting posts, two cutters, and a plurality of clamping units, wherein the two brackets are respectively mounted at both ends of the length direction of the test seat, the two linear drive elements are respectively vertically mounted on the two brackets, the two mounting posts are respectively driven and connected with the two linear drive elements, and the two cutters are respectively mounted on the two mounting posts. Through the synchronous action of the linear drive elements, the two cutters can synchronously cut the ends of the optical fibers, and by setting a clamping unit, the optical fiber is in a clamped state in the V-shaped positioning groove, so that the optical fiber will not have uneven edges, and by setting a straightening unit, the optical fiber is straightened and then clamped, so that the detection accuracy of the optical fiber excess length is higher.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber processing and testing equipment, in particular to an optical fiber excess length cutting test bench device. Background Art

[0002] The excess length of optical cables mainly comes from the secondary coating and cabling process, which together determine the size of the excess length of optical cables. The secondary coating process is the most important process for the excess length of optical cables and the adjustment of excess length. It can achieve the purpose of adjusting the excess length by adjusting other process parameters. The optical fiber is released from the pay-off frame under a certain pay-off tension, enters the main machine extrusion system through the oil gun, and then enters the pull-out through the hot water tank for cooling. In this process, the optical fiber moves in a straight line. Because the optical fiber grease is thixotropic, the chemical bonds break under shear force, the viscosity of the fiber grease decreases, and it has good fluidity. The optical fiber is straightened in the hot water tank section, and no excess length is formed, or negative excess length is formed. Because the optical fiber has a certain amount of stretching when it is stressed (generally <1%), on the other hand, when the optical fiber is pulled in the pull-out, the optical fiber is close to the inner side of the bundle tube, and the relative length of the bundle tube is longer than the optical fiber, which is a negative excess length. The cold water tank section is the main stage for the formation of excess length. The bundle tube shrinks greatly when it is cooled, and the excess length is formed, which offsets the previous negative excess length and forms the required excess length.

[0003] The excess length of optical fiber in the casing is directly related to the tensile, temperature cycle and attenuation performance of the finished product. The calculation formula is (optical fiber length in the tube - casing length) mm / casing length mm*100%; the general control layer twisted casing is 0-0.6‰, and the central tube is 0.8-1.5‰; therefore, it is very important to accurately cut the casing length. The existing mainstream excess length test is basically two people standing on the platform (generally 10 meters long) holding blades at both ends, one person shouts the slogan "1, 2, 3" and cuts it immediately at the end of 3. Because the human receiving response signal needs to be converted (even if there is a 0.01S delay) and the manual cutting of the casing is not synchronized, the casing cuts will be uneven (slightly missing edges, beveled edges, etc.), which ultimately leads to unequal fiber differences between the fibers taken out of the casing after cutting, and there are certain differences in fiber length. Therefore, solving the fiber difference problem after casing cutting requires starting from the delay of receiving signals and the synchronization of blade cutting, which has become the key to the problem to be solved urgently.

[0004] In order to solve the above problems, we propose an optical fiber excess length cutting test bench device. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an optical fiber excess length cutting test bench device. In order to solve the technical problems mentioned in the above background technology, the present invention provides the following technical solutions:

[0006] The present invention provides an optical fiber excess length cutting test bench device, comprising:

[0007] The test seat is horizontally mounted on the placement surface and has a V-shaped positioning groove in the form of a notch on the top thereof, wherein the length of the V-shaped positioning groove spans the length direction of the test seat;

[0008] The cutting mechanism is used to cut the end of the optical fiber placed in the V-shaped positioning groove. The cutting mechanism includes two brackets, two linear drive elements, two mounting columns, two cutters, and a plurality of clamping units. The two brackets are respectively mounted at the two ends of the length direction of the test seat, the two linear drive elements are respectively vertically mounted on the two brackets, the two mounting columns are respectively driven and connected to the two linear drive elements, and the two cutters are respectively mounted on the two mounting columns.

[0009] In the optical fiber excess length cutting test bench device as described above, the minimum lateral distance between the two cutting knives is set to 10m.

[0010] In the optical fiber excess length cutting test bench device as described above, the linear drive element is a telescopic cylinder, the telescopic cylinder is vertically mounted on a bracket, and the cylinder rod of the telescopic cylinder is threadedly connected to the mounting column.

[0011] In the above-mentioned optical fiber excess length cutting test bench device, the pressing unit comprises:

[0012] A cross plate, horizontally connected to two mounting posts;

[0013] A clamping rod, which is vertically arranged on the horizontal plate and can slide freely up and down;

[0014] A pressing block, fixedly connected to the lower end of the pressing rod and corresponding to the V-shaped positioning groove;

[0015] The elastic buffer structure is used to buffer the upward movement of the pressing block.

[0016] In the optical fiber excess length cutting test bench device as described above, the material of the pressing block is set to be brass.

[0017] In the optical fiber excess length cutting test bench device as described above, the elastic buffer structure includes a spring wrapped around the clamping rod, and the two ends of the spring elastic force direction elastically press against the cross plate and the clamping block respectively. The upper end of the clamping rod is sleeved with a limiting ring, and the limiting ring is used to limit the downward movement of the clamping rod.

[0018] The optical fiber excess length cutting test bench device as described above further includes a straightening unit for straightening the optical fiber, and the straightening unit includes:

[0019] A sliding block is horizontally slidably connected to the test seat;

[0020] A clamping block is arranged on the sliding block, and a limiting groove corresponding to the V-shaped positioning groove is opened on the clamping block;

[0021] A clamping structure, used for clamping the optical fiber inserted into the limiting groove;

[0022] The gas spring has two ends pivotally connected to the mounting column and the sliding block respectively.

[0023] In the above-mentioned optical fiber excess length cutting test bench device, the clamping structure includes a clamping bolt with a vertical thread penetrating through the clamping block, and the lower end of the clamping bolt penetrates into the limiting groove and is fixedly connected to a flexible clamping block.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: through the synchronous action of the linear drive element, the two cutters can synchronously cut the ends of the optical fiber. In addition, by providing a clamping unit, the optical fiber is in a clamped state in the V-shaped positioning groove, so that the optical fiber will not have uneven edges. In addition, by providing a straightening unit, the optical fiber is straightened and then clamped, which makes the detection accuracy of the optical fiber excess length higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the assembly structure of an optical fiber excess length cutting test bench device of the present invention;

[0027] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at point A;

[0028] Figure 3 for Figure 1 A schematic diagram of the structure from a side view;

[0029] Figure 4 for Figure 3 An enlarged schematic diagram of the local structure at point B.

[0030] In the figure: 1-test seat, 2-V-shaped positioning groove, 3-cross plate, 4-bracket, 5-telescopic cylinder, 6-gas spring, 7-clamping block, 8-guide column, 9-sliding block, 10-clamping block, 11-spring, 12-clamping rod, 13-limiting ring, 14-mounting column, 15-cutter, 16-limiting groove, 17-flexible clamping block, 18-clamping bolt. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example

[0032] See also Figure 1-4 , Figure 1-Figure 4A fiber excess length cutting test bench device is shown, comprising a test seat 1, a cutting mechanism, and a straightening unit. The test seat 1 is horizontally mounted on a placement surface and a V-shaped positioning groove 2 in the form of a notch is provided on its top. After the optical fiber is straightened, it is placed in the V-shaped positioning groove 2, and the inner walls on both sides of the V-shaped positioning groove 2 will have a limiting effect on the optical fiber, so that the optical fiber can be positioned in the V-shaped positioning groove 2. The length of the V-shaped positioning groove 2 spans the length direction of the test seat 1. A fixing plate is provided at the bottom of the test seat 1, and the fixing plate can be mounted on the horizontal placement surface by means of screws, expansion bolts, etc. In addition, the straightness of the V-shaped positioning groove 2 needs to be guaranteed to be within 1-3mm, so that the straightness of the test seat 1 meets the detection requirements, and the cutting mechanism is used to cut the end of the optical fiber placed in the V-shaped positioning groove 2. The cutting mechanism includes two brackets 4, two linear drive elements, two mounting columns 14, two cutters 15, and a plurality of clamping units. The two brackets 4 are respectively mounted at both ends of the length direction of the test seat 1. The two linear drive elements are respectively vertically mounted on the two brackets 4. The two mounting columns 14 are respectively driven and connected with the two linear drive elements. Preferably, the linear drive element can be set as a telescopic cylinder 5. The telescopic cylinder 5 is vertically mounted on the bracket 4, and the cylinder rod of the telescopic cylinder 5 is threadedly connected with the mounting column 14. The telescopic cylinder 5 is connected to an external solenoid valve through a pipeline. The solenoid valve controls the movement of the telescopic cylinder 5, thereby controlling the extension or contraction of the cylinder rod of the telescopic cylinder 5. The telescopic cylinder 5 is connected to an external air compression device through a pipeline. The two cutters 15 They are respectively installed on two mounting columns 14. When the solenoid valve controls the cylinder rod of the telescopic cylinder 5 to extend, the mounting column 14 is driven to move downward, and the cutter 15 cuts the end of the optical fiber. In addition, the minimum horizontal spacing between the two cutters 15 is set to 10m, so that the length of the optical fiber after cutting meets the detection requirements. The clamping unit includes a cross plate 3, a clamping rod 12, a clamping block 10, and an elastic buffer structure. The cross plate 3 is horizontally connected to the two mounting columns 14. A threaded column is provided at each end of the cross plate 3. A threaded sleeve is provided on each of the two mounting columns 14. The two threaded columns are respectively threaded in the two threaded sleeves, so that the cross plate 3 can be quickly connected to the two mounting columns 14. The clamping rod 12 is vertically penetrated through the cross plate 3 and can slide freely up and down. A through hole is provided on the plate 3 for the clamping rod 12 to pass freely. In addition, a bushing can be embedded on the cross plate 3. The bushing is slidably mounted on the clamping rod 12, so that the clamping rod 12 will not wear the cross plate 3 when sliding on the cross plate 3. The clamping block 10 is fixed to the lower end of the clamping rod 12 and corresponds to the V-shaped positioning groove 2. The clamping block 10 can be arranged at equal intervals along the length direction of the test seat 1. The clamping block 10 is located directly above the V-shaped positioning groove 2, so that the clamping block 10 can compress the optical fiber in the V-shaped positioning groove 2. The elastic buffer structure is used to buffer the upward movement of the clamping block 10. In this way, when the clamping block 10 compresses the optical fiber, it will not cause a large squeeze on the optical fiber, so that the optical fiber will not be worn. The material of the clamping block 10 is set to be brass.Since the brass material is ductile, the pressing block 10 will not cause wear to the optical fiber when it is pressed. Specifically, the elastic buffer structure includes a spring 11 wrapped around the pressing rod 12. The two ends of the spring 11 in the elastic direction elastically press against the cross plate 3 and the pressing block 10 respectively. The upper end of the pressing rod 12 is sleeved with a limiting ring 13. The limiting ring 13 is used to limit the downward movement of the pressing rod 12. The spring 11 is used to elastically press against the pressing block 10. In this way, when the pressing block 10 presses the optical fiber, when the pressing force is too large, the spring 11 will expand and contract, so that the pressing After the block 10 presses the optical fiber tightly, no large extrusion wear will occur. The straightening unit is used to straighten the optical fiber. The straightening unit includes a sliding block 9, a clamping block 7, a clamping structure, and a gas spring 6. The sliding block 9 is horizontally slidably connected to the test seat 1. Specifically, a guide column 8 can be horizontally fixed on the test seat 1. The sliding block 9 is mounted on the guide column 8 and can slide freely horizontally, so that the sliding block can be horizontally slidably connected to the test seat 1. The clamping block 7 is arranged on the sliding block 9. A limit groove 16 corresponding to the V-shaped positioning groove 2 is opened on the clamping block 7. The optical fiber is exposed from the V-shaped positioning groove. One end of the positioning groove 2 penetrates into the limiting groove 16, and the clamping structure is used to clamp the optical fiber penetrated into the limiting groove 16, so that the optical fiber can be reliably clamped and installed in the limiting groove 16. The two ends of the gas spring 6 are respectively pivoted on the mounting column 14 and the sliding block 9. Since the gas spring is retractable and can produce a buffering effect during the expansion and contraction process, when the mounting column moves downward, the gas spring will push the sliding block to move on the guide column. During the movement, the sliding block will move toward the outside of the test seat, so that the clamping structure generates a clamping force on the optical fiber, and the optical fiber can be pulled. Straightening effect, so that the optical fiber can be straightened. Specifically, the clamping structure includes a clamping bolt 18 with a vertical thread penetrating the clamping block 7. The lower end of the clamping bolt 18 penetrates the limit groove 16 and is fixed with a flexible clamping block 17. The clamping bolt 18 is screwed on the clamping block 7, so that the flexible clamping block 17 generates a clamping force on the optical fiber. Since the flexible clamping block 17 has the ability to deform, it avoids generating a large clamping force on the optical fiber. After the end of the optical fiber is cut, the excess length of the optical fiber is detected by the detection principle in the prior art, which will not be repeated here.

[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical fiber excess length cutting test bench device, characterized in that: include: A test seat (1) is horizontally mounted on a placement surface and has a V-shaped positioning groove (2) in the form of a notch on its top, wherein the length of the V-shaped positioning groove (2) spans the length direction of the test seat (1); a cutting mechanism is used to cut the end of the optical fiber placed in the V-shaped positioning groove (2), wherein the cutting mechanism comprises two brackets (4), two linear drive elements, two mounting columns (14), two cutters (15), and a plurality of clamping units, wherein the two brackets (4) are respectively mounted at the two ends of the length direction of the test seat (1), the two linear drive elements are respectively vertically mounted on the two brackets (4), the two mounting columns (14) are respectively connected to the two linear drive elements for driving, the two cutters (15) are respectively mounted on the two mounting columns (14), and the clamping unit comprises: a horizontal plate (3) horizontally connected to the two mounting columns (14); a clamping rod (12), wherein the clamping rod (12) is vertically penetrated through the two mounting columns (14); The invention relates to a test base (1) and a test base (2) comprising a plurality of optical fibers, wherein the plurality of optical fibers are connected to the test base (1) and are capable of sliding freely up and down; a pressing block (10) fixedly connected to the lower end of the pressing rod (12) and corresponding to the V-shaped positioning groove (2); an elastic buffer structure for buffering the upward movement of the pressing block (10), and also comprising a straightening unit for straightening the optical fiber, wherein the straightening unit comprises: a sliding block (9) horizontally slidably connected to the test base (1); a clamping block (7) arranged on the sliding block (9), and a limiting groove (16) corresponding to the V-shaped positioning groove (2) is formed on the clamping block (7); a clamping structure for clamping the optical fiber inserted into the limiting groove (16); a gas spring (6) having two ends pivotally connected to the mounting column (14) and the sliding block (9) respectively; the clamping structure comprises a clamping bolt (18) vertically threaded and inserted into the clamping block (7), and the lower end of the clamping bolt (18) is inserted into the limiting groove (16) and is fixedly connected to the flexible pressing block (17).

2. The optical fiber excess length cutting test bench device according to claim 1, characterized in that: The minimum lateral distance between the two cutters (15) is set to 10m.

3. The optical fiber excess length cutting test bench device according to claim 1, characterized in that: The linear drive element is a telescopic cylinder (5), the telescopic cylinder (5) is vertically mounted on a bracket (4), and a cylinder rod of the telescopic cylinder (5) is threadedly connected to a mounting column (14).

4. The optical fiber excess length cutting test bench device according to claim 1, characterized in that: The material of the pressing block (10) is set to be brass.

5. The optical fiber excess length cutting test bench device according to claim 1, characterized in that: The elastic buffer structure comprises a spring (11) sleeved on a clamping rod (12), with the two ends of the spring (11) in the elastic force direction elastically pressing against the cross plate (3) and the clamping block (10) respectively, and the upper end of the clamping rod (12) is sleeved with a limiting ring (13), and the limiting ring (13) is used to limit the downward movement of the clamping rod (12).

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