Heating device for heat shrink tube of optical fiber fusion splicer

Abstract

The utility model provides a heating device for a heat shrink tube of an optical fiber fusion splicer, which relates to the field of optical fiber fusion and heat shrink, and comprises a lower heating cavity plate, an upper heating cavity plate and a fusion optical fiber, the fusion optical fiber penetrates through the inner sides of the lower heating cavity plate and the upper heating cavity plate, the upper heating cavity plate is hinged and covered on the upper end face of the lower heating cavity plate, and the lower heating cavity plate is hinged and covered on the lower end face of the upper heating cavity plate. Small fans are installed on the lower surface of the lower heating cavity plate and the upper surface of the upper heating cavity plate, hot air cavities are formed in the lower heating cavity plate and the upper heating cavity plate, electric heating pipes are installed in the hot air cavities, and hot air notches are formed in the inner side arc faces of the lower heating cavity plate and the upper heating cavity plate. And the small fan is communicated with the hot air notch through the small fan. The utility model solves the problems that the heating surface of the heating assembly in the prior art is in a fixed position, and the welding firmness of the optical fiber welding point is easily influenced when the optical fiber sleeved by the heat shrink tube is turned over and moved.

Description

Technical Field

[0001] The utility model relates to the field of optical fiber fusion heat shrinkage, in particular to a heat shrink tube heating device for an optical fiber fusion splicer. Background Art

[0002] Heat shrink tubing is a special polyolefin heat shrink tubing, also called EVA material. The outer layer is made of high-quality soft cross-linked polyolefin material and the inner layer is made of hot melt adhesive. The outer layer has the characteristics of insulation, corrosion resistance, and wear resistance, while the inner layer has the advantages of low melting point, waterproof sealing, and high adhesion. Heat shrink tubing is a necessary tubing during the use of optical fiber fusion splicers. The heat shrink tubing is used to protect the fusion joints of optical fibers after fusion splicing by the optical fiber fusion splicer. After searching, the prior art (application number: CN202220119049.9) records that "the heat shrink tubing heating device described in the utility model has a simple structure and is easy to move. The device directly heats the heat shrink tubing through a heating assembly to reduce heat loss during heat transfer and prevent hot air from causing harm to the operator. At the same time, the position of the heating assembly is adjusted by sliding between the first base plate and the second base plate to adapt to the heating requirements of heat shrink tubing under different lengths and usage environments, and to heat key areas to reduce heat consumption." However, the heating surface of the heating assembly in the prior art is in a fixed position, and flipping or moving the optical fiber connected to the heat shrink tubing can easily affect the firmness of the fusion joint at the optical fiber fusion joint. Utility Model Content

[0003] In order to overcome the defects of the prior art, a heat shrink tube heating device for an optical fiber fusion splicer is provided to solve the problem that the heating surface of the heating component in the prior art is in a fixed position, and flipping or moving the optical fiber sleeved with the heat shrink tube can easily affect the firmness of the optical fiber fusion point.

[0004] To achieve the above object, a heat shrink tube heating device for an optical fiber fusion splicer is provided, comprising: a lower heating cavity plate, an upper heating cavity plate and a fusion optical fiber, wherein the fusion optical fiber is penetrated through the inner sides of the lower heating cavity plate and the upper heating cavity plate.

[0005] The upper end surface of the lower heating cavity plate is hingedly covered with an upper heating cavity plate, and small fans are installed on the lower surface of the lower heating cavity plate and the upper surface of the upper heating cavity plate. Hot air cavities are provided inside the lower heating cavity plate and the upper heating cavity plate, and electric heating pipes are installed in the hot air cavities. Hot air slots are provided on the inner curved surfaces of the lower heating cavity plate and the upper heating cavity plate, and the small fan is connected to the hot air slots through the small fan.

[0006] Furthermore, a heat shrink tube is sleeved at the fusion point in the middle of the fusion-spliced ​​optical fiber, and cylindrical cavities are arranged inside the lower heating cavity plate and the upper heating cavity plate; and the fusion-spliced ​​optical fiber and the heat shrink tube are located in the cylindrical cavity.

[0007] Furthermore, the hot air slots are distributed in a ring shape on the inner arc surfaces of the lower heating cavity plate and the upper heating cavity plate; and the hot air slots face the surface of the heat shrink tube.

[0008] Furthermore, support blocks are welded on the left and right sides of the lower heating cavity plate, and positioning pressure plates are connected to the left and right sides of the upper heating cavity plate via adjusting studs.

[0009] Furthermore, the upper concave surface of the support block and the lower surface of the positioning pressure plate are both bonded with rubber pads, and the front surface of the upper heating cavity plate is provided with a handle.

[0010] Furthermore, an arc-shaped filter screen is attached to the inner arc surface of the lower heating cavity plate, and the electric heating tubes are equidistantly arranged in the hot air cavity.

[0011] Furthermore, the lower heating cavity plate, the upper heating cavity plate, the small fan and the electric heating tube constitute a heat shrinkage heating device at the fusion joint of the fusion-joined optical fiber.

[0012] The beneficial effect of the utility model is that the heat shrink tube heating device of the optical fiber fusion splicer of the utility model utilizes the lower heating cavity plate and the upper heating cavity plate which are hinged up and down to cover the optical fiber fusion point and the heat shrink tube of the optical fiber fusion splicer, and heats the cavity plate and the internal hot air cavity of the upper heating cavity plate downwardly through a small fan, so that the blown air is heated by the electric heating tube and then discharged from multiple groups of hot air slots to the surface of the heat shrink tube, so that the evenly distributed wind direction blows to the heat shrink tube at the optical fiber fusion point, thereby ensuring that the heat shrink tube shrinks evenly and fully, reducing the external force on the optical fiber fusion point during the heat shrinking process, preventing the optical fiber fusion point from shifting or breaking during heat shrinking, and improving the processing quality and welding firmness of optical fiber fusion heat shrinkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of the heat shrink tube heating device of the optical fiber fusion splicer embodiment of the present utility model.

[0014] Figure 2 It is a front view cross-sectional structural schematic diagram of a heat shrink tube heating device for an optical fiber fusion splicer according to an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the partial cross-sectional structure of a side view of a heat shrink tube heating device for an optical fiber fusion splicer according to an embodiment of the utility model.

[0016] Figure 4 The utility model is a schematic side view of the heat shrink tube heating device of the optical fiber fusion splicer according to the embodiment of the present invention.

[0017] In the figure: 1. Lower heating cavity plate; 11. Support block; 12. Arc filter; 2. Upper heating cavity plate; 21. Positioning pressure plate; 22. Adjusting stud; 23. Rubber pad; 24. Hot air cavity; 25. Hot air notch; 26. Handle; 3. Small fan; 31. Electric heating tube; 4. Fusion optical fiber; 41. Heat shrink tube. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 4 As shown, the utility model provides a heat shrink tube heating device for an optical fiber fusion splicer, comprising: a lower heating cavity plate 1, an upper heating cavity plate 2 and a fusion optical fiber 4, wherein the fusion optical fiber 4 penetrates the inner sides of the lower heating cavity plate 1 and the upper heating cavity plate 2.

[0019] The upper end surface of the lower heating cavity plate 1 is hingedly covered with an upper heating cavity plate 2, and small fans 3 are installed on the lower surface of the lower heating cavity plate 1 and the upper surface of the upper heating cavity plate 2. Hot air cavities 24 are provided inside the lower heating cavity plate 1 and the upper heating cavity plate 2, and electric heating tubes 31 are installed in the hot air cavity 24. Hot air slots 25 are provided on the inner curved surfaces of the lower heating cavity plate 1 and the upper heating cavity plate 2, and the small fan 3 is connected to the hot air slots 25 through the small fan 3.

[0020] Working principle: first, put the heat shrink tube 41 on the surface of the optical fiber, and then use the optical fiber fusion splicer to perform fusion splicing. After fusion splicing, move the heat shrink tube 41 to the fusion point of the fusion optical fiber 4, open the upper heating cavity plate 2, place the fusion optical fiber 4 on the lower heating cavity plate 1 and the support block 11, and then cover the upper heating cavity plate 2, rotate the adjustment screw 22, so that the positioning pressure plate 21 presses the two ends of the fusion optical fiber 4 on the support block 11, start the small fan 3 and the electric heating tube 31, so that the wind blown in by the small fan 3 is heated and discharged from the hot air slot 25, thereby heating the heat shrink tube 41 on the inner side of the lower heating cavity plate 1 and the upper heating cavity plate 2, so that the heat shrink tube 41 is heat-shrunk and wrapped at the fusion point of the fusion optical fiber 4. After the heat shrinkage is completed, take out the fusion optical fiber 4 for cooling to complete the optical fiber fusion heat shrinkage process.

[0021] In this embodiment, a heat shrink tube 41 is sleeved at the middle fusion point of the fusion optical fiber 4, and cylindrical cavities are provided inside the lower heating cavity plate 1 and the upper heating cavity plate 2; and the fusion optical fiber 4 and the heat shrink tube 41 are located in the cylindrical cavity.

[0022] As a preferred implementation, the heat shrink tube 41 protects the fusion point in the middle of the fusion-spliced ​​optical fiber 4 by heat shrinkage, thereby preventing the fusion point in the middle of the fusion-spliced ​​optical fiber 4 from being easily broken.

[0023] In this embodiment, the hot air slots 25 are distributed in a ring shape on the inner arc surfaces of the lower heating cavity plate 1 and the upper heating cavity plate 2 ; and the hot air slots 25 face the surface of the heat shrink tube 41 .

[0024] As a preferred embodiment, multiple groups of hot air slots 25 discharge the hot air heated by the electric heating tube 31 to the surface of the heat shrink tube 41, so that the heat shrink tube 41 is evenly shrunk and firmly wrapped around the welding point of the fused optical fiber 4.

[0025] In this embodiment, support blocks 11 are welded to the left and right sides of the lower heating cavity plate 1 , and positioning pressing plates 21 are connected to the left and right sides of the upper heating cavity plate 2 via adjusting studs 22 .

[0026] As a preferred embodiment, the support block 11 is convenient for supporting the two ends of the fused optical fiber 4. By adjusting the stud 22, the positioning pressure plate 21 is driven downward to press the fused optical fiber 4 on the surface of the support block 11 to prevent the fused optical fiber 4 from sagging and contacting the inner wall of the lower heating cavity plate 1.

[0027] In this embodiment, rubber pads 23 are bonded to the concave surface of the support block 11 and the lower surface of the positioning plate 21 , and a handle 26 is installed on the front surface of the upper heating cavity plate 2 .

[0028] As a preferred embodiment, the rubber pad 23 prevents the positioning pressing plate 21 from over-pressing and damaging the fusion-spliced ​​optical fiber 4. The handle 26 can be lifted to open the upper heating cavity plate 2, so as to facilitate taking out or putting in the fusion-spliced ​​optical fiber 4.

[0029] In this embodiment, an arc-shaped filter screen 12 is attached to the inner arc surface of the lower heating cavity plate 1 , and the electric heating tubes 31 are arranged equidistantly in the hot air cavity 24 .

[0030] As a preferred embodiment, the arc filter 12 is convenient for preventing foreign matter from falling into the hot air slot 25 of the arc surface of the lower heating cavity plate 1. The electric heating pipe 31 heats the air blown into the hot air cavity 24 to increase the temperature.

[0031] In this embodiment, the lower heating cavity plate 1 , the upper heating cavity plate 2 , the small fan 3 and the electric heating tube 31 constitute a heat shrink heating device at the fusion joint of the fusion-splicing optical fiber 4 .

[0032] As a preferred embodiment, the heat shrinkage heating device at the fusion joint of the fusion-joined optical fiber 4 facilitates evenly distributed wind blowing toward the heat shrinkage tube 41 at the fusion joint point of the optical fiber, thereby ensuring that the heat shrinkage tube 41 shrinks evenly and fully, reducing the external force on the fusion joint point of the optical fiber during the heat shrinkage process, preventing the fusion joint point of the optical fiber from shifting or breaking during heat shrinkage, and improving the processing quality and fusion firmness of the optical fiber fusion heat shrinkage.

[0033] The utility model discloses a heat shrink tube heating device for optical fiber fusion splicer, which can effectively solve the problem that flipping or moving the optical fiber connected with the heat shrink tube can easily affect the firmness of the fusion joint of the optical fiber, and facilitates evenly distributed wind to blow the heat shrink tube at the fusion joint of the optical fiber, thereby ensuring uniform and sufficient heat shrinkage of the heat shrink tube, reducing the external force on the fusion joint of the optical fiber during the heat shrinkage process, preventing the fusion joint of the optical fiber from shifting or breaking during the heat shrinkage, and improving the processing quality and fusion firmness of the optical fiber fusion splicing. The utility model is suitable for the heat shrink tube heating device of optical fiber fusion splicer.

Claims

1. A heat shrink tube heating device for an optical fiber fusion splicer, comprising: A lower heating cavity plate (1), an upper heating cavity plate (2) and a fusion-splicing optical fiber (4), wherein the fusion-splicing optical fiber (4) penetrates the inner side of the lower heating cavity plate (1) and the upper heating cavity plate (2), and is characterized in that: The upper end surface of the lower heating cavity plate (1) is hingedly covered with an upper heating cavity plate (2); a small fan (3) is installed on the lower surface of the lower heating cavity plate (1) and the upper surface of the upper heating cavity plate (2); a hot air cavity (24) is arranged inside the lower heating cavity plate (1) and the upper heating cavity plate (2); an electric heating pipe (31) is installed in the hot air cavity (24); a hot air slot (25) is opened on the inner arc surface of the lower heating cavity plate (1) and the upper heating cavity plate (2); and the small fan (3) is connected to the hot air slot (25) through the small fan (3).

2. The heat shrink tube heating device for an optical fiber fusion splicer according to claim 1, characterized in that: A heat shrink tube (41) is sleeved at the middle fusion point of the fusion optical fiber (4), and cylindrical cavities are arranged inside the lower heating cavity plate (1) and the upper heating cavity plate (2); and the fusion optical fiber (4) and the heat shrink tube (41) are located in the cylindrical cavity.

3. The heat shrink tube heating device for optical fiber fusion splicer according to claim 1, characterized in that: The hot air slots (25) are distributed in a ring shape on the inner arc surfaces of the lower heating cavity plate (1) and the upper heating cavity plate (2); and the hot air slots (25) face the surface of the heat shrink tube (41).

4. The heat shrink tube heating device for an optical fiber fusion splicer according to claim 1, characterized in that: Support blocks (11) are welded to the left and right sides of the lower heating cavity plate (1), and positioning pressure plates (21) are connected to the left and right sides of the upper heating cavity plate (2) via adjusting studs (22).

5. The heat shrink tube heating device for optical fiber fusion splicer according to claim 4, characterized in that: The upper concave surface of the support block (11) and the lower surface of the positioning pressure plate (21) are both bonded with rubber pads (23), and the front surface of the upper heating cavity plate (2) is provided with a handle (26).

6. The heat shrink tube heating device for optical fiber fusion splicer according to claim 1, characterized in that: The inner curved surface of the lower heating chamber plate (1) is fitted with an arc-shaped filter screen (12), and the electric heating tubes (31) are arranged at equal intervals in the hot air chamber (24).

7. The heat shrink tube heating device for an optical fiber fusion splicer according to claim 1, characterized in that: The lower heating cavity plate (1), the upper heating cavity plate (2), the small fan (3) and the electric heating tube (31) form a heat shrinkage heating device at the fusion joint of the fusion-joined optical fiber (4).

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