Optical fiber heat shrink tube

Abstract

The utility model relates to the technical field of optical cable connection, in particular to an optical fiber heat shrink tube, which comprises a heat shrink tube, a hot melting tube, a first clamping piece, a second clamping piece, a first protective hose and a second protective hose, and is reasonable and compact in structure and convenient to use, and the first protective hose and the second protective hose can provide support when an optical fiber is bent. The first clamping piece and the second clamping piece are arc-shaped, so that a gap between the heat shrink tube and the hot melting tube after heat shrinkage can be effectively reduced, air entering the heat shrink tube is reduced, the service life of the hot melting tube is prolonged, and meanwhile, force conducted to the hot melting tube in the hot melting process is more uniform and symmetrical; therefore, the problem that the optical fiber in the hot-melt tube is easy to break due to the fact that the hot-melt tube is stressed unevenly and distorted due to the fact that a column is used as an internal support in the existing optical fiber heat-shrinkable tube can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cable connection, and is an optical fiber heat shrink tube. Background Art

[0002] During the optical cable splicing process, the bare optical fiber that has been fused is very fragile and has low tensile strength because it has no surface nylon coating protection. The discharge needle of the fusion splicer generates an arc through high-voltage discharge to fuse the two cut sections of the optical fiber together. However, the surface of the fusion point of the optical fiber after fusion is not smooth. According to the surface stress characteristics of glass, the fusion point is most likely to break under stress. In order to enhance the physical strength of the optical fiber after fusion and reduce external stress bending and breakage, after the fusion is completed, it is necessary to use optical fiber heat shrink tubing to shrink the fusion point and a section of bare fiber without coating to protect it.

[0003] Before heating, traditional optical fiber heat shrink tubing usually places a stainless steel rod or ceramic rod next to the optical fiber as an internal support. However, such a cylindrical shape is not conducive to the outer heat shrink tubing to shrink tightly and wrap the hot melt tube and steel rod. After the heat shrinkage is completed, there is often a gap between the side of the steel rod and the heat shrink tubing and the hot melt tubing. Air can easily enter the gap and oxidize the hot melt tubing, causing the heat shrink tubing to age prematurely or the internal stress change to cause the optical fiber loss to change. At the same time, the internal stress of the optical fiber in the heat shrink tubing is uneven, which can easily cause the optical fiber in the hot melt tubing to break after long-term use. Summary of the invention

[0004] The utility model provides an optical fiber heat shrink tube, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing optical fiber heat shrink tube uses a columnar object as an internal support, which causes the heat-melting tube to be unevenly stressed and twisted, and easily causes the optical fiber in the heat-melting tube to break.

[0005] The technical solution of the utility model is achieved through the following measures: an optical fiber heat shrink tube, comprising a heat shrink tube, a hot melt tube, a first clamp, a second clamp, a first protective hose and a second protective hose, the heat shrink tube is sleeved on the outside of the hot melt tube, the left part of the heat shrink tube is provided with a first protective hose capable of reducing the bending angle of the optical fiber, the second protective hose and the first protective hose are consistent in structure and are symmetrically distributed, a first clamp is provided above the hot melt tube corresponding to the inner side of the heat shrink tube, the first clamp is in an arc shape with an opening downward, a second clamp is provided below the hot melt tube, the second clamp is consistent in structure with the first clamp and are symmetrically distributed.

[0006] The following are further optimizations and / or improvements to the above utility model technical solution:

[0007] The first protective hose may include a connecting section and a protective section. The connecting section is mounted on the left side of the heat shrinkable tube. The left end of the connecting section is fixedly connected to the right end of the protective section. The protective section is in a stepped shape with a diameter gradually decreasing from right to left.

[0008] The above-mentioned heat shrink tube may include a main body section and a shrinking section, the main body section is tubular, and the left and right ends of the main body section are fixedly connected with the truncated cone-shaped shrinking section.

[0009] A plurality of grooves extending from left to right may be provided at intervals along the circumference of the inner side of the first clamp, and each groove is in a V-shape with its opening facing inwards.

[0010] The first clamp may include a fixed soft plate and a ceramic plate. The fixed soft plate is arc-shaped. A plurality of ceramic plates with inverted trapezoidal cross-sections are installed along the circumference of the lower part of the fixed soft plate. The upper and lower end surfaces of each ceramic plate are arc surfaces with openings facing inward.

[0011] The utility model has a reasonable and compact structure and is easy to use. When in use, the hot-melt tube is sleeved on the outside of the optical fiber. During the hot-melting process, the diameter of the heat-shrinkable tube is reduced, and the first clamp and the second clamp are squeezed so that the front lower side and the rear lower side of the first clamp are respectively in contact with the front upper side and the rear upper side of the second clamp to form a tubular protective shell; the first protective hose and the second protective hose can provide support when the optical fiber is bent to prevent the optical fiber from breaking due to excessive bending angle; the first clamp and the second clamp are both arc-shaped, which can effectively reduce the gap between the heat-shrinkable tube and the hot-melt tube after heat shrinkage to prevent air from entering the gap and affecting the service life of the hot-melt tube, and at the same time make the force transmitted to the hot-melt tube during the hot-melting process more uniform and symmetrical, preventing the hot-melt tube from twisting due to uneven force, and can effectively solve the problem that the existing optical fiber heat-shrinkable tube uses a columnar object as an internal support, which causes the hot-melt tube to be twisted due to uneven force, and easily causes the optical fiber in the hot-melt tube to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of the first embodiment.

[0013] Attached Figure 2 It is a schematic diagram of the side cross-sectional structure of the main section of the heat shrink tube after enlargement.

[0014] Attached Figure 3 It is a schematic diagram of the side cross-sectional structure of the main section after the heat shrink tube is melted.

[0015] Attached Figure 4 It is a schematic diagram of the side structure of the first clip in the fourth embodiment.

[0016] Attached Figure 5 It is a schematic diagram of the side structure of the first clip in the fifth embodiment.

[0017] The codes in the attached drawings are: 1 is the main section, 2 is the necking section, 3 is the first clamp, 4 is the second clamp, 5 is the hot melt tube, 6 is the optical fiber, 7 is the connecting section, 8 is the protection section, 9 is the fixed soft board, 10 is the ceramic board, and 11 is the groove. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0020] The present invention is further described below in conjunction with the embodiments and drawings:

[0021] Embodiment 1, as attached Figure 1 , 2 As shown in Figure 3, the optical fiber heat shrink tube includes a heat shrink tube, a hot melt tube 5, a first clamp 3, a second clamp 4, a first protective hose and a second protective hose. The heat shrink tube is sleeved on the outside of the hot melt tube 5, and the left part of the heat shrink tube is provided with a first protective hose that can reduce the bending angle of the optical fiber 6. The second protective hose and the first protective hose have the same structure and are symmetrically distributed. A first clamp 3 is provided above the hot melt tube 5 at the inner side of the heat shrink tube, and the first clamp 3 is in an arc shape with an opening downward. A second clamp 4 is provided below the hot melt tube 5, and the second clamp 4 has the same structure as the first clamp 3 and is symmetrically distributed.

[0022] When in use, the hot melt tube 5 is sleeved on the outside of the optical fiber 6. During the hot melting process, the diameter of the heat shrink tube is reduced, squeezing the first clamp 3 and the second clamp 4 so that the front lower side and the rear lower side of the first clamp 3 are in contact with the front upper side and the rear upper side of the second clamp 4 respectively, forming a tubular protective shell; the first protective hose and the second protective hose can provide support when the optical fiber 6 is bent to prevent the optical fiber 6 from breaking due to excessive bending angle. The first clamp 3 and the second clamp 4 are both arc-shaped, which can effectively reduce the gap between the heat shrink tube and the hot melt tube 5 after heat shrinkage to prevent air from entering the gap and affecting the service life of the hot melt tube 5. At the same time, the force transmitted to the hot melt tube 5 during the hot melting process is more uniform and symmetrical, preventing the hot melt tube 5 from twisting due to uneven force, and can effectively solve the problem of the existing optical fiber heat shrink tube using a column as an internal support, which causes the hot melt tube 5 to be twisted due to uneven force, and easily causes the optical fiber 6 in the hot melt tube 5 to break.

[0023] The above optical fiber heat shrink tubing can be further optimized and / or improved according to actual needs:

[0024] Embodiment 2, as attached Figure 1 As shown, this embodiment is a further optimization of the above embodiment. The first protective hose includes a connecting section 7 and a protective section 8. The connecting section 7 is mounted on the left side of the heat shrink tube. The left end of the connecting section 7 is fixedly connected to the right end of the protective section 8. The protective section 8 is in a stepped shape with a diameter gradually decreasing from right to left.

[0025] When the bending angle of the optical fiber 6 is too large, it is easy to break, and the signal transmission loss of the optical fiber 6 will increase. In this embodiment, the protective sections 8 of the first protective hose and the second protective hose are in a stepped shape with a diameter gradually decreasing from right to left, which can provide multi-section support when the optical fiber 6 is bent, so that the bending angle of the optical fiber 6 is smaller, preventing the optical fiber 6 from breaking due to excessive bending, and reducing the transmission loss of the optical fiber 6 caused by the excessive bending angle.

[0026] Embodiment 3, as attached Figure 1 As shown, this embodiment is a further optimization of the above embodiment, the heat shrink tube includes a main body section 1 and a necking section 2, the main body section 1 is tubular, and both ends of the main body section 1 are fixedly connected with a truncated cone-shaped necking section 2. The necking section 2 is truncated cone-shaped, which can limit the first clamp 3, the second clamp 4 and the hot melt tube 5, so that the first clamp 3, the second clamp 4 and the hot melt tube 5 are kept in the correct position without moving or falling off.

[0027] Embodiment 4, as attached Figure 4 As shown, this embodiment is a further optimization of the above embodiment. A plurality of grooves 11 extending left and right are provided at intervals along the circumference of the inner side of the first clamp 3 , and each groove 11 is in a V-shape with its opening facing inward.

[0028] The first clip 3 and the second clip 4 are both known metal clips. A plurality of grooves 11 are provided on the inner sides of the first clip 3 and the second clip 4 at intervals along the circumference. Each groove 11 is in a V-shape with the opening inward, which can effectively improve the bending performance of the first clip 3 and the second clip 4 and prevent the first clip 3 and the second clip 4 from breaking during the heat shrinking process. Specifically, when the heat shrink tube is heated and squeezed by the first clip 3 and the second clip 4, the front and rear ends of each groove 11 gradually approach and finally contact, so that the first clip 3 and the second clip 4 have a larger bending arc and are not easy to break, thereby enabling the first clip 3 and the second clip 4 to wrap the hot melt tube 5 more closely, effectively reducing the gap between the heat shrink tube and the hot melt tube 5.

[0029] Embodiment 5, as attached Figure 5 As shown, this embodiment is a further optimization of the first to third embodiments, the first clamp 3 includes a fixed soft board 9 and a ceramic board 10, the fixed soft board 9 is arc-shaped, and a plurality of ceramic boards 10 with inverted trapezoidal cross-sections are installed along the circumference at the lower part of the fixed soft board 9, and the upper end face and the lower end face of each ceramic board 10 are arc surfaces with an opening facing inward.

[0030] The fixed soft board 9 is an existing well-known plastic soft board. A plurality of ceramic boards 10 with inverted trapezoidal cross-sections are installed along the circumference at the lower part of the fixed soft board 9, so that a V-shaped gap with an opening facing inward is formed between adjacent ceramic boards 10 to prevent the plurality of ceramic boards 10 from being squeezed and broken from each other during the heat shrinking process. During the heat shrinking process, the fixed soft board 9 is bent by force, causing the gap between adjacent ceramic boards 10 to gradually shrink and eventually disappear, so that the plurality of ceramic boards 10 fit together, thereby making the first clip 3 and the second clip 4 have a larger bending arc, which can more closely wrap the hot melt tube 5 and effectively reduce the gap between the heat shrink tube and the hot melt tube 5.

[0031] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An optical fiber heat shrink tube, characterized in that It includes a heat shrink tube, a hot melt tube, a first clamp, a second clamp, a first protective hose and a second protective hose. The heat shrink tube is mounted on the outside of the hot melt tube, and the left part of the heat shrink tube is provided with a first protective hose that can reduce the bending angle of the optical fiber. The second protective hose and the first protective hose have the same structure and are symmetrically distributed. A first clamp is provided above the hot melt tube corresponding to the inner side of the heat shrink tube, and the first clamp is in an arc shape with an opening downward. A second clamp is provided below the hot melt tube, and the second clamp has the same structure as the first clamp and is symmetrically distributed.

2. The optical fiber heat shrink tube according to claim 1, characterized in that The first protective hose includes a connecting section and a protecting section. The connecting section is sleeved on the left side of the heat shrinkable tube. The left end of the connecting section is fixedly connected to the right end of the protecting section. The protecting section is in a stepped shape with a diameter gradually decreasing from right to left.

3. The optical fiber heat shrink tube according to claim 1 or 2, characterized in that The heat shrinkable tube comprises a main body section and a shrinking section. The main body section is tubular, and both left and right ends of the main body section are fixedly connected with truncated cone-shaped shrinking sections.

4. The optical fiber heat shrink tube according to claim 1 or 2, characterized in that A plurality of grooves extending left and right are arranged at intervals along the circumference of the inner side of the first clamp, and each groove is in a V-shape with its opening facing inwards.

5. The optical fiber heat shrink tube according to claim 3, characterized in that A plurality of grooves extending left and right are arranged at intervals along the circumference of the inner side of the first clamp, and each groove is in a V-shape with its opening facing inwards.

6. The optical fiber heat shrink tube according to claim 1 or 2, characterized in that The first clamp includes a fixed soft plate and a ceramic plate. The fixed soft plate is arc-shaped. A plurality of ceramic plates with inverted trapezoidal cross sections are installed along the circumference of the lower part of the fixed soft plate. The upper end face and the lower end face of each ceramic plate are arc surfaces with openings facing inwards.

7. The optical fiber heat shrink tube according to claim 3, characterized in that The first clamp includes a fixed soft plate and a ceramic plate. The fixed soft plate is arc-shaped. A plurality of ceramic plates with inverted trapezoidal cross sections are installed along the circumference of the lower part of the fixed soft plate. The upper end face and the lower end face of each ceramic plate are arc surfaces with openings facing inwards.

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