Optical fiber preform rod capable of protecting prefabricated conical head

Abstract

The utility model discloses an optical fiber preform capable of protecting a prefabricated conical head, and relates to the technical field of preforms. The prefabricated rod comprises a prefabricated rod body and a wiredrawing furnace top cover, a prefabricated conical head is arranged at the front end of the prefabricated rod body, a protective sleeve is fixed at one end of the prefabricated conical head of the prefabricated rod body, the protective sleeve comprises a lower guide sleeve, a middle guide sleeve and an upper guide sleeve which are integrally connected, and transverse straight grooves are formed in the two sides in the lower guide sleeve. The protective cover is mounted on the prefabricated conical head at the bottom end of the prefabricated rod body, so that the prefabricated rod can be protected in temporary storage and transfer processes, the prefabricated rod is in a high-quality state before a wire drawing process, the effect of a subsequent process is ensured, meanwhile, the protective cover does not need to be dismounted after the prefabricated rod is connected with a wire drawing furnace subsequently, and the production cost is reduced. In the wire drawing process, the bottom end of the preform can be guided through the universal balls, the two ends of the preform can be limited and guided, the stability and straightness of the preform in the wire drawing process are ensured, and the subsequent optical fiber forming effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of preformed rods, in particular to an optical fiber preformed rod capable of protecting a preformed cone head. Background Art

[0002] For optical fiber processing, after the preform rod is formed, a preformed cone head is set at the front end of the preform rod. In the initial state of preform rod drawing, it can be quickly formed into filaments. However, due to the existence of the preformed cone head, the outer diameter is gradually reduced until the end position of the preformed cone head, which is roughly a small cone head of a filament with too low strength.

[0003] After the preform rod production is completed, the next process is the wire drawing process. There is a gap between the two processes, and sometimes the preform rod cannot be quickly applied to wire drawing after production is completed, and needs to be cached during this period.

[0004] Similarly, during the preform rod transfer and subsequent drawing furnace positioning and drawing processes, the tail end of the preform rod is clamped, and the preformed cone head end is at the bottom and in a free state. Since the preform rod itself is relatively long, the protection of the preformed cone head can effectively ensure subsequent production efficiency.

[0005] Therefore, designing a preform rod that can protect the preformed cone head is a problem that needs to be solved by workers in this field. Utility Model Content

[0006] The utility model aims to provide an optical fiber preform rod with a protective preformed cone head. By installing a protective cover on the preformed cone head at the bottom end of the preform rod body, the preform rod can be protected during temporary storage and transportation, ensuring that it is in a high-quality state before the drawing process, ensuring the effect of subsequent processes, and at the same time, after being connected to the drawing furnace, there is no need to remove the protective cover. During the drawing process, the bottom end of the preform rod can be guided by a universal ball, and the preform rod can be limited and guided at both ends, ensuring the stability and straightness of the preform rod during the drawing process, and ensuring the subsequent optical fiber molding effect.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model discloses an optical fiber preform rod capable of protecting a preformed cone head, comprising a preform rod body, wherein a preformed cone head is arranged at the front end of the preform rod body;

[0009] A protective sleeve is fixed to one end of the preformed cone head of the preform rod body;

[0010] The protective sleeve comprises a lower guide sleeve, a middle guide sleeve and an upper guide sleeve which are integrally connected;

[0011] Both sides of the lower guide sleeve are provided with transverse straight grooves, a support seat is slidably connected in the transverse straight groove, a lower adjustment bolt is provided between the outer side of the support seat and the lower guide sleeve, and a support edge is provided on the inner side of the support seat to match the peripheral side of the prefabricated cone head;

[0012] The inner wall of the middle guide sleeve is annularly fixed with a plurality of vertical edges, and the inner side of the vertical edges is linearly fixed with a plurality of universal balls;

[0013] The upper guide sleeve is provided with a plurality of upper adjustment bolts in a ring shape, and an arc-shaped clamping arm is provided inside the upper adjustment bolts;

[0014] A lower base is provided on the peripheral side of the bottom end of the lower guide sleeve, and a plurality of mounting openings are provided on the lower base;

[0015] The end of the preform rod body close to the preform cone head passes through the upper guide sleeve and the middle guide sleeve, the protective sleeve is fixed to the preform rod body through the upper adjusting bolt and the arc clamp arm, a plurality of universal balls are all fitted with the preform rod body, and the preform cone head is movably arranged on the supporting edge of the supporting seat.

[0016] Furthermore, the inner diameters of the lower guide sleeve, the middle guide sleeve and the upper guide sleeve increase in sequence, and the inner diameter of the lower guide sleeve is greater than the outer diameter of the preform body.

[0017] Furthermore, the inner wall of the middle guide sleeve is annularly provided with a plurality of vertical grooves, and the vertical side gaps are arranged in the vertical grooves.

[0018] Furthermore, an outer opening is provided on the outer side of the middle guide sleeve and at a position opposite to the vertical groove, an inner blind opening is provided on the outer side of the vertical edge, and a screw is provided between the outer opening and the inner blind opening.

[0019] Furthermore, a group of guide rods are provided on the outer side of the arc-shaped clamping arm, and the guide rods pass through the upper guide sleeve and are slidably connected to the upper guide sleeve.

[0020] Furthermore, a heat insulation layer is fixed to the bottom of the lower base.

[0021] The utility model has the following beneficial effects:

[0022] 1. The utility model installs a protective cover on the prefabricated cone head at the bottom end of the prefabricated rod body, so that the prefabricated rod can be protected during temporary storage and transportation, ensuring that it is in a high-quality state before the drawing process and the effect of the subsequent processes. At the same time, after being connected to the drawing furnace, there is no need to remove the protective cover. During the drawing process, the bottom end of the prefabricated rod can be guided by a universal ball bearing, and the prefabricated rod can be limited and guided at both ends, ensuring the stability and straightness of the prefabricated rod during the drawing process and ensuring the subsequent optical fiber molding effect.

[0023] 2. The utility model can protect the weak points of the preformed rod by installing a protective cover on the preformed cone head at the bottom end of the preformed rod body, thereby ensuring the stability of subsequent wire drawing. The preformed cone head can be protected after the preformed rod is produced. The protective cover also serves as a base and can be placed vertically without other supports, thereby facilitating the storage and transportation of the preformed rods and reducing the occupied space.

[0024] 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

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic structural diagram of an optical fiber preform rod capable of protecting a preformed cone head according to the utility model;

[0027] Figure 2 It is a schematic diagram of the structure of the utility model after some parts are cut away;

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1-preform rod body, 2-preformed cone head, 3-protective sleeve, 301-lower guide sleeve, 302-middle guide sleeve, 303-upper guide sleeve, 304-transverse straight groove, 305-support seat, 306-support edge, 307-vertical edge, 308-universal ball, 309-arc clamping arm, 310-lower base, 311-installation port, 312-lower adjusting bolt, 313-upper adjusting bolt, 314-vertical slot, 315-external through port, 316-inner blind port, 317-guide rod, 318-thermal insulation layer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-2 As shown, the utility model is an optical fiber preform rod capable of protecting a preformed cone head, comprising a preform rod body 1, and a preformed cone head 2 is arranged at the front end of the preform rod body 1;

[0032] A protective sleeve 3 is fixed to one end of the preformed cone head 2 of the preform rod body 1;

[0033] The protective sleeve 3 includes a lower guide sleeve 301, a middle guide sleeve 302 and an upper guide sleeve 303 which are integrally connected;

[0034] Both sides of the lower guide sleeve 301 are provided with transverse straight grooves 304, a support seat 305 is slidably connected in the transverse straight groove 304, a lower adjusting bolt 312 is provided between the outer side of the support seat 305 and the lower guide sleeve 301, and a supporting edge 306 is provided on the inner side of the support seat 305 to cooperate with the side surfaces of the prefabricated cone head 2;

[0035] The inner wall of the middle guide sleeve 302 is annularly fixed with a plurality of vertical edges 307, and a plurality of universal balls 308 are linearly fixed inside the vertical edges 307;

[0036] The upper guide sleeve 303 is provided with a plurality of upper adjustment bolts 313 in an annular shape, and an arc-shaped clamping arm 309 is provided inside the upper adjustment bolts 313;

[0037] A lower base 310 is provided on the side surface around the bottom end of the lower guide sleeve 301, and a plurality of mounting openings 311 are provided on the lower base 310;

[0038] One end of the preform rod body 1 close to the preform cone head 2 passes through the upper guide sleeve 303 and the middle guide sleeve 302, the protective sleeve 3 is fixed to the preform rod body 1 through the upper adjusting bolt 313 and the arc clamp arm 309, a plurality of universal balls 308 are all fitted with the preform rod body 1, and the preform cone head 2 is movably arranged on the supporting edge 306 of the supporting seat 305.

[0039] Among them Figure 1-2 As shown, the inner diameters of the lower guide sleeve 301 , the middle guide sleeve 302 and the upper guide sleeve 303 increase in sequence, and the inner diameter of the lower guide sleeve 301 is greater than the outer diameter of the preform body 1 .

[0040] Among them Figure 2 As shown, the inner wall of the middle guide sleeve 302 is annularly provided with a plurality of vertical grooves 314 , and the vertical edges 307 are spaced apart in the vertical grooves 314 .

[0041] Among them Figure 2 As shown, an outer opening 315 is provided on the outer side of the middle guide sleeve 302 and opposite to the vertical groove 314 , an inner blind opening 316 is provided on the outer side of the vertical edge 307 , and a screw is provided between the outer opening 315 and the inner blind opening 316 .

[0042] Among them Figure 1-2 As shown, a group of guide rods 317 are provided on the outer side of the arc-shaped clamping arm 309 , and the guide rods 317 pass through the upper guide sleeve 303 and are slidably connected to the upper guide sleeve 303 .

[0043] Among them Figure 1-2 As shown, a heat insulation layer 318 is fixed to the bottom of the lower base 310 .

[0044] The working principle of the utility model is as follows: after the preformed cone head 2 on the preform rod body 1 is formed, one end of the preformed cone head 2 is extended into the protective sleeve 3, and when the preformed cone head 2 is fitted and positioned with the supporting edge 306 of the supporting seat 305, all the universal balls 308 are fitted with the outer surface of the preform rod body 1, and the upper adjusting bolt 313 is tightened to cause the arc-shaped clamping arm 309 to fit the preform rod body 1, thereby realizing the connection between the preform rod body 1 and the protective sleeve 3.

[0045] During the storage of the preform body 1 or when it is transported by the transport rack, the lower base 310 can also play the role of a support to ensure that the preform body 1 can be placed vertically.

[0046] When the preform body 1 is connected to the wire drawing furnace, the installation between the protective sleeve 3 and the wire drawing furnace can be achieved through the installation port 311. After the top of the preform body 1 is connected to the tooling above the wire drawing furnace, the lower adjusting bolt is turned to cause the support seat 305 to be accommodated in the horizontal straight groove 304 to ensure that there is no obstruction below the preform body 1. Then the upper adjusting bolt is turned to separate the protective sleeve 3 and the preform body 1. At this time, the wire drawing furnace can be started for wire drawing. The universal ball 308 on the middle guide sleeve 302 is used for guiding the preform body 1 during the wire drawing process to ensure the straightness of the preform body 1 during the wire drawing process and ensure stability.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An optical fiber preform capable of protecting a preformed cone head, comprising a preformed rod body (1), wherein a preformed cone head (2) is provided at the front end of the preformed rod body (1), and characterized in that: A protective sleeve (3) is fixed to one end of the preformed cone head (2) of the preform rod body (1); The protective sleeve (3) comprises a lower guide sleeve (301), a middle guide sleeve (302) and an upper guide sleeve (303) which are integrally connected; Both sides of the lower guide sleeve (301) are provided with transverse straight grooves (304), a support seat (305) is slidably connected in the transverse straight groove (304), a lower adjustment bolt (312) is provided between the outer side of the support seat (305) and the lower guide sleeve (301), and a support edge (306) matching with the peripheral side of the prefabricated cone head (2) is provided on the inner side of the support seat (305); The inner wall of the middle guide sleeve (302) is annularly fixed with a plurality of vertical edges (307), and the inner side of the vertical edges (307) is linearly fixed with a plurality of universal balls (308); A plurality of upper adjusting bolts (313) are provided in a ring shape on the upper guide sleeve (303), and an arc-shaped clamping arm (309) is provided inside the upper adjusting bolt (313); A lower base (310) is provided on the peripheral side of the bottom end of the lower guide sleeve (301), and a plurality of mounting openings (311) are provided on the lower base (310); The end of the preform rod body (1) close to the preform cone head (2) passes through the upper guide sleeve (303) and the middle guide sleeve (302); the protective sleeve (3) is fixed to the preform rod body (1) through an upper adjustment bolt (313) and an arc-shaped clamping arm (309); a plurality of universal balls (308) are all fitted to the preform rod body (1); and the preform cone head (2) is movably arranged on a supporting edge (306) of a supporting seat (305).

2. The optical fiber preform with a protective preformed cone head according to claim 1, characterized in that: The inner diameters of the lower guide sleeve (301), the middle guide sleeve (302) and the upper guide sleeve (303) increase in sequence, and the inner diameter of the lower guide sleeve (301) is greater than the outer diameter of the preform body (1).

3. The optical fiber preform with a protective preformed cone head according to claim 1, characterized in that: The inner wall of the middle guide sleeve (302) is annularly provided with a plurality of vertical grooves (314), and the gaps of the vertical edges (307) are arranged in the vertical grooves (314).

4. The optical fiber preform with a protective preformed cone head according to claim 3, characterized in that: An outer opening (315) is provided on the outer side of the middle guide sleeve (302) and at a position opposite to the vertical groove (314), an inner blind opening (316) is provided on the outer side of the vertical edge (307), and a screw is provided between the outer opening (315) and the inner blind opening (316).

5. The optical fiber preform with a protective preformed cone head according to claim 1, characterized in that: A group of guide rods (317) are arranged on the outer side of the arc-shaped clamping arm (309), and the guide rods (317) penetrate the upper guide sleeve (303) and are slidably connected to the upper guide sleeve (303).

6. The optical fiber preform with a protective preformed cone head according to claim 1, characterized in that: A heat insulation layer (318) is fixed to the bottom of the lower base (310).

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