A polarization-maintaining optical fiber stress preform rod with easy hole opening and hole opening method thereof

Abstract

The present invention discloses a polarization-maintaining optical fiber stress preform that is easy to open holes, and relates to the technical field of preforms. The present invention comprises a single-mode mother rod, two stress mother rods, and two tooling rod bodies. The single-mode mother rod comprises an outer glass tube layer, and the two tooling rod bodies are arranged inside the outer glass tube layer. The area between the outer glass tube layer and the two tooling rod bodies is formed with a cladding by an MCVD process. The present invention arranges two new tooling rod bodies during the forming process of the single-mode mother rod, so that the tooling rod bodies are pre-buried in the single-mode mother rod after forming. When subsequently opening holes, holes can be punched while stretching, thereby ensuring the stability of the drill rod. At the same time, a long guide groove is formed at the position of the original metal core rod, which can stably guide the metal core rod, further ensuring the straightness of the drill rod, and avoiding the problems of insufficient drilling stability, efficiency, and straightness caused by the excessive length of the preform body.

Description

Technical Field

[0001] The present invention belongs to the technical field of preform rods, and in particular relates to a polarization-maintaining optical fiber stress preform rod that is easy to open holes and a hole opening method thereof. Background Art

[0002] For the processing of panda-type polarization-maintaining optical fiber preform, it consists of a single-mode mother rod and two stress mother rods. Two side holes are set on the single-mode mother rod, and the stress mother rods are subsequently embedded and installed in the side holes. Therefore, it is necessary to open a hole on the solid single-mode mother rod.

[0003] Due to the long length of the preform rod, the drill rod used for drilling the corresponding hole is too long, so drilling holes in the mother rod is difficult, which affects the production effect and efficiency of the preform rod. At the same time, the straightness and stability of the hole must be high, and the existing single-mode mother rod structure cannot effectively facilitate hole drilling, thus affecting the quality and processing efficiency of the preform rod. Summary of the Invention

[0004] The object of the present invention is to provide a polarization-maintaining optical fiber stress preform that is easy to drill holes. By arranging two new tooling rods during the molding process of a single-mode mother rod, the tooling rods are pre-buried in the single-mode mother rod after molding. When drilling holes subsequently, the holes can be drilled while being stretched, thereby ensuring the stability of the drill rod. At the same time, a long guide groove is formed at the position of the original metal core rod, which can stably guide the metal core rod, further ensuring the straightness of the drill rod, and avoiding the problems of insufficient drilling stability, insufficient efficiency and insufficient straightness caused by the excessive length of the preform body.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a polarization-maintaining optical fiber stress preform rod that is easy to open, comprising a single-mode mother rod, two stress mother rods and two tooling rod bodies;

[0007] The single-mode mother rod comprises an outer glass tube layer, the two tooling rods are arranged in the outer glass tube layer, and the area between the outer glass tube layer and the two tooling rods is formed with a cladding layer by an MCVD process;

[0008] The two tooling rods are fixed to the single-mode mother rod through the cladding and are symmetrical about the axis of the single-mode mother rod. Both ends of the tooling rod extend to the outside of both ends of the tooling rod.

[0009] The tooling rod body includes a metal core rod, a casing is fixed to the side surface of the metal core rod, and the casing is a high-melting-point non-metallic tube body. The two ends of the metal core rod are respectively provided with a drill rod connector and a rod removal connector;

[0010] When the metal core rod on the tooling rod body is pulled out, a hole is drilled at the position of the tooling rod body by a drilling machine to form a stress mother rod hole, the sleeve is cut off, and the two stress mother rods are embedded and installed in the two stress mother rod holes to form a stress preform rod body.

[0011] Furthermore, the drilling machine tool includes a bed, a tooling table is fixed on the top of the bed, and a drilling mechanism and a stretching device are respectively fixed at both ends of the bed.

[0012] Furthermore, the drilling mechanism includes a drill rod driving platform and a drill rod body, a plurality of drill bits are linearly provided on the peripheral side surface of the end of the drill rod body, and a threaded opening is provided on the end of the drill rod body.

[0013] Furthermore, the drill rod connector is a screw structure, the drill rod connector is integrated with the metal core rod, the drill rod connector is threadedly matched with the threaded opening, and the tightening rotation direction of the drill rod connector and the threaded opening is opposite to the rotation direction of the drill rod body.

[0014] Furthermore, the stretching device is a winch, a shaft clamp is provided at one end of the pull rope of the stretching device, and the rod-removing connector is connected to the end of the pull rope of the stretching device through the shaft clamp.

[0015] Furthermore, the rod-removing connector includes an end shaft, which cooperates with the shaft clamp. A rotating rod is provided at the tail end of the end shaft, and the rotating rod passes through the metal core rod and rotates with the metal core rod.

[0016] Furthermore, a group of slides are provided on the peripheral side of the shaft clamp, and a guide sleeve is provided at the front position of the stretching device. The guide sleeve is opposite to the metal core rod, and a group of flat surfaces are provided inside the guide sleeve. The two slides slide along the two flat surfaces respectively.

[0017] Furthermore, the bore diameter of the drill rod body is larger than the outer diameter of the casing, and the stress matrix hole is composed of the casing and a portion of the cladding outside the casing.

[0018] Furthermore, a plurality of mounting openings are provided on one end of the sleeve and one end of the metal core rod. The sleeve is fixed to the metal core rod through fasteners and the mounting openings, and the fasteners and the mounting openings are located outside the single-mode mother rod.

[0019] A method for opening a hole in a polarization-maintaining optical fiber stress preform that is easy to open a hole of the present invention comprises the following steps:

[0020] SS01 fixes the single-mode mother bar equipped with the tooling bar body to the bed through the tooling table;

[0021] SS02: Remove the fasteners connecting the casing and the metal core rod, and connect the drill pipe connector at the end of the metal core rod to the end of the drill pipe body;

[0022] SS03 connects the metal mandrel's stripping connector to the tensioning device's drawstring, and drives the tensioning device to keep the drawstring taut. Ensure that the shaft clamp is located in the guide sleeve and the two slides are in contact with the two flat surfaces.

[0023] SS04 starts the drilling mechanism and moves step by step towards the single-mode mother rod to drill the hole. The synchronous stretching device stretches the metal core rod at the same speed. The metal core rod slides and guides along the casing under the stretching and the thrust of the drill rod body.

[0024] SS05 When the drill pipe body passes through the other end of the single-mode mother rod, the hole is opened. At this time, the casing and part of the cladding outside the casing are drilled to form a stress mother rod hole.

[0025] The present invention has the following beneficial effects:

[0026] 1. The present invention arranges two new tooling rods during the forming process of the single-mode mother rod, so that the tooling rods are pre-buried in the single-mode mother rod after forming. When drilling a hole subsequently, the drill rod can be connected to the metal core rod, and then the tail end of the metal core rod is connected to the stretching device. The hole can be drilled while being stretched, thereby ensuring the stability of the drill rod. At the same time, a long guide groove is formed at the position of the original metal core rod, which can stably guide the metal core rod and further ensure the straightness of the drill rod. Therefore, the drilling effect and efficiency are ensured, and the problems of insufficient drilling stability, insufficient efficiency and insufficient straightness caused by the excessive length of the preform body are avoided.

[0027] 2. The present invention uses a telescopic connection between the metal core rod and the casing. After the metal core rod is pulled out, the drilling capacity required when opening the drill rod is greatly reduced. That is, the position of the original metal core rod does not need to be drilled, which reduces the load on the drill rod, improves work efficiency and ensures the work efficiency and quality of the drill rod.

[0028] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural schematic diagram of the single-mode mother rod and the tooling rod body of the present invention;

[0031] Figure 2 This is a schematic structural diagram of a single-mode mother rod and a tooling rod body of the present invention after cutting off the middle section;

[0032] Figure 3 This is a schematic diagram of the structure of the present invention after connecting the drilling machine tool and the stretching device;

[0033] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0034] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0035] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0036] 1-single-mode mother rod, 2-tooling rod body, 3-drilling machine, 4-guide sleeve, 101-outer glass tube layer, 102-cladding, 201-metal core rod, 202-casing, 203-drill rod connection, 204-rod stripping connector, 205-end shaft, 206-rotating rod, 207-mounting port, 301-bed, 302-tooling table, 303-drilling mechanism, 304-stretching device, 305-drill rod drive platform, 306-drill rod body, 307-drill bit, 308-threaded port, 309-axis clamp, 310-slide. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] See also Figure 1-5 As shown, the present invention is a polarization-maintaining optical fiber stress preform that is easy to open, comprising a single-mode mother rod 1, two stress mother rods and two tooling rod bodies 2;

[0039] The single-mode mother rod 1 includes an outer glass tube layer 101, two tooling rod bodies 2 are arranged inside the outer glass tube layer 101, and the area between the outer glass tube layer 101 and the two tooling rod bodies 2 is formed with a cladding layer 102 by the MCVD process;

[0040] The two tooling rods 2 are fixed to the single-mode mother rod 1 through the cladding 102 and are symmetrical about the axis of the single-mode mother rod 1. Both ends of the tooling rod 2 extend to the outside of both ends of the tooling rod 2.

[0041] The tooling rod body 2 includes a metal core rod 201, a casing 202 is fixed to the side of the metal core rod 201, and the casing 202 is a high melting point non-metallic tube. The two ends of the metal core rod 201 are respectively provided with a drill rod connector 203 and a rod removal connector 204;

[0042] When the metal core rod 201 on the tooling rod body 2 is pulled out, the drilling machine 3 is used to drill a hole in the tooling rod body 2 to form a stress mother rod hole, the sleeve 202 is cut off, and the two stress mother rods are embedded and installed in the two stress mother rod holes to form a stress preform rod body.

[0043] Among them Figure 3 As shown, the drilling machine tool 3 includes a bed 301 , a tooling table 302 is fixed on the top of the bed 301 , and a drilling mechanism 303 and a stretching device 304 are respectively fixed at both ends of the bed 301 .

[0044] Among them Figure 3-4 As shown, the drilling mechanism 303 includes a drill rod driving platform 305 and a drill rod body 306 . A plurality of drill bits 307 are linearly arranged on the side surface around the end of the drill rod body 306 , and a threaded opening 308 is arranged on the end of the drill rod body 306 .

[0045] Among them Figure 3-4 As shown, the drill rod connector 203 is a screw structure, the drill rod connector 203 is integrated with the metal core rod 201, the drill rod connector 203 is threadedly matched with the threaded opening 308, and the tightening rotation direction of the drill rod connector 203 and the threaded opening 308 is opposite to the rotation direction of the drill rod body 306.

[0046] Among them Figure 3 and Figure 5 As shown, the stretching device 304 is a winch, and a shaft clamp 309 is provided at one end of the pull rope of the stretching device 304. The rod-removing connector 204 is connected to the end of the pull rope of the stretching device 304 through the shaft clamp 309.

[0047] Among them Figure 3 and Figure 5 As shown, the rod-removing connector 204 includes an end shaft 205, which cooperates with the shaft clamp 309. A rotating rod 206 is provided at the tail end of the end shaft 205. The rotating rod 206 passes through the metal core rod 201 and rotates with the metal core rod 201.

[0048] Among them Figure 3 and Figure 5 As shown, a group of slides 310 are provided on the side of the shaft clamp 309, and a guide sleeve 4 is provided at the front position of the stretching device 304. The guide sleeve 4 is opposite to the metal core rod 201. A group of flat surfaces are provided inside the guide sleeve 4, and the two slides 310 slide along the two flat surfaces respectively.

[0049] The diameter of the drill hole of the drill pipe body 306 is larger than the outer diameter of the casing 202 , and the stress matrix hole is composed of the casing 202 and a portion of the cladding 102 outside the casing 202 .

[0050] Among them Figure 1-2As shown, a plurality of mounting openings 207 are provided at one end of the sleeve 202 and one end of the metal core rod 201. The sleeve 202 is fixed to the metal core rod 201 through fasteners and the mounting openings 207. The fasteners and the mounting openings 207 are located outside the single-mode mother rod 1.

[0051] A method for opening a hole in a polarization-maintaining optical fiber stress preform that is easy to open a hole of the present invention comprises the following steps:

[0052] SS01 fixes the single-mode mother rod 1 equipped with the tooling rod body 2 on the bed 301 through the tooling table 302;

[0053] SS02 removes the fasteners connecting the casing 202 and the metal core rod 201, and connects the drill pipe connector 203 at the end of the metal core rod 201 to the end of the drill pipe body 306;

[0054] SS03 connects the stripping connector 204 of the metal core rod 201 to the drawstring of the stretching device 304, and drives the stretching device 304 to keep the drawstring in a taut state. It also ensures that the shaft clamp 309 is located in the guide sleeve 4 and the two slides 310 are respectively in contact with the two flat surfaces.

[0055] SS04 starts the drilling mechanism 303 and moves stepwise toward the single-mode mother rod 1 to drill a hole. The synchronous stretching device 304 stretches the metal core rod 201 at the same speed. The metal core rod 201 slides and guides along the casing 202 under the stretching and the thrust of the drill rod body 306.

[0056] SS05 When the drill rod body 306 passes through the other end of the single-mode mother rod 1, the hole opening is completed. At this time, the casing 202 and the partial cladding 102 outside the casing 202 are drilled to form a stress mother rod hole.

[0057] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A polarization-maintaining optical fiber stress preform rod that is easy to open, comprising a single-mode mother rod (1) and two stress mother rods, characterized in that: Also includes two tooling rod bodies (2); The single-mode mother rod (1) comprises an outer glass tube layer (101), the two tooling rod bodies (2) are arranged in the outer glass tube layer (101), and the area between the outer glass tube layer (101) and the two tooling rod bodies (2) is formed with a cladding layer (102) through an MCVD process; The two tooling rod bodies (2) are fixed to the single-mode mother rod (1) through the cladding (102) and are symmetrical about the axis center of the single-mode mother rod (1), and both ends of the tooling rod body (2) extend to the outside of both ends of the single-mode mother rod (1); The tooling rod body (2) comprises a metal core rod (201), a casing (202) is fixed to the side surface of the metal core rod (201), the casing (202) is a high-melting-point non-metallic tube, and both ends of the metal core rod (201) are respectively provided with a drill rod connector (203) and a rod removal connector (204); When the metal core rod (201) on the tooling rod body (2) is pulled out, a hole is drilled at the position of the tooling rod body (2) by the drilling machine (3) to form a stress mother rod hole, the sleeve (202) is cut off, and the two stress mother rods are embedded and installed in the two stress mother rod holes to form a stress preform rod body.

2. The polarization-maintaining optical fiber stress preform with easy opening according to claim 1, characterized in that: The drilling machine tool (3) comprises a bed (301), a tooling table (302) is fixed on the top of the bed (301), and a drilling mechanism (303) and a stretching device (304) are respectively fixed at both ends of the bed (301).

3. The polarization-maintaining optical fiber stress preform with easy opening according to claim 2, characterized in that: The drilling mechanism (303) comprises a drill rod driving platform (305) and a drill rod body (306). A plurality of drill bits (307) are linearly provided on the peripheral side surface of the end of the drill rod body (306). A threaded opening (308) is provided on the end of the drill rod body (306).

4. The polarization-maintaining optical fiber stress preform with easy hole opening according to claim 3, characterized in that: The drill rod connecting piece (203) is a screw structure, the drill rod connecting piece (203) is integrated with the metal core rod (201), the drill rod connecting piece (203) is threadedly matched with the threaded opening (308), and the tightening rotation direction of the drill rod connecting piece (203) and the threaded opening (308) is opposite to the rotation direction of the drill rod body (306).

5. The polarization-maintaining optical fiber stress preform with easy opening according to claim 2, characterized in that: The stretching device (304) is a winch, and a shaft clamp (309) is provided at one end of the pull rope of the stretching device (304). The rod-removing connector (204) is connected to the end of the pull rope of the stretching device (304) via the shaft clamp (309).

6. The polarization-maintaining optical fiber stress preform with easy hole opening according to claim 5, characterized in that: The rod-removing connector (204) includes an end shaft (205), the end shaft (205) cooperates with a shaft clamp (309), and a rotating rod (206) is provided at the tail end of the end shaft (205), and the rotating rod (206) passes through the metal core rod (201) and rotates with the metal core rod (201).

7. The polarization-maintaining optical fiber stress preform with easy hole opening according to claim 6, characterized in that: A group of slides (310) are provided on the side surface of the shaft clamp (309), and a guide sleeve (4) is provided at the front position of the stretching device (304). The guide sleeve (4) is opposite to the metal core rod (201), and a group of flat surfaces are provided inside the guide sleeve (4). The two slides (310) slide along the two flat surfaces respectively.

8. The polarization-maintaining optical fiber stress preform with easy hole opening according to claim 3, characterized in that: The drill hole diameter of the drill rod body (306) is larger than the outer diameter of the casing (202), and the stress mother rod hole is composed of the casing (202) and a portion of the cladding (102) outside the casing (202).

9. The polarization-maintaining optical fiber stress preform with easy hole opening according to claim 1, characterized in that: One end of the sleeve (202) and one end of the metal core rod (201) are both provided with a plurality of mounting openings (207); the sleeve (202) is fixed to the metal core rod (201) via fasteners and the mounting openings (207); the fasteners and the mounting openings (207) are located outside the single-mode mother rod (1).

10. The method for opening a hole in a polarization-maintaining optical fiber stress preform that is easy to open a hole according to any one of claims 1 to 9, characterized in that: The following steps are involved: SS01 fixes the single-mode mother rod (1) equipped with the tooling rod body (2) on the bed (301) through the tooling table (302); SS02 Remove the fasteners connecting the casing (202) and the metal core rod (201), and connect the drill pipe connector (203) at the end of the metal core rod (201) to the end of the drill pipe body (306); SS03 connects the rod-removing connector (204) of the metal core rod (201) to the drawstring of the stretching device (304), and drives the stretching device (304) to make the drawstring in a taut state, and ensures that the shaft clamp (309) is located in the guide sleeve (4), and the two slides (310) are respectively in contact with the two flat surfaces; SS04 starts the drilling mechanism (303) and moves stepwise toward the single-mode mother rod (1) to drill a hole. The synchronous stretching device (304) stretches the metal core rod (201) at the same speed. The metal core rod (201) slides and guides along the casing (202) under the stretching and the thrust of the drill rod body (306); SS05 When the drill rod body (306) passes through the other end of the single-mode mother rod (1), the hole is opened. At this time, the casing (202) and the part of the cladding (102) outside the casing (202) are drilled to form a stress mother rod hole.

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