Optical fiber fixing structure

Abstract

The present invention relates to an optical fiber fixing structure, which comprises: a first half shell, having a first inner wall extending along a first direction; the first half shell having a first butt joint surface adjacent to the first inner wall and extending along the first direction; along the first direction, the two ends of the first half shell are respectively a first end and a second end; two first sealing members are respectively sealed and connected to the inner wall of the first end and the inner wall of the second end of the first half shell; a second half shell, having a second inner wall extending along the first direction; the first inner wall and the second inner wall form a containing cavity; the second half shell has a second butt joint surface adjacent to the second inner wall and aligned and sealed with the first butt joint surface, and the second butt joint surface and the first butt joint surface are separable; along the first direction, the two ends of the second half shell are respectively a third end and a fourth end; and two second sealing members are respectively sealed and connected to the inner wall of the third end and the inner wall of the fourth end of the second half shell; the first sealing member and the second sealing members at the corresponding ends form a cable through hole along the first direction.

Description

Technical Field

[0001] The invention relates to the field of electric power, and in particular to an optical fiber fixing structure. Background Art

[0002] Fiber optic sensing technology is a new sensing technology that has developed along with the development of optical fiber and fiber optic communication technology. It is the fastest-growing high-tech application technology in the world since the mid-1970s. There are two main types of fiber optic sensing technology on the market, one is to use optical fiber directly as a sensor, and the other is a sensor based on gratings. Fiber optic sensors are essentially different from electrical-based sensors. Fiber optic sensors use light as a carrier of sensitive information and optical fiber as a medium for transmitting sensitive information. They are widely used due to their unique characteristics.

[0003] Traditionally, in a structure such as an installation cabinet, an optical fiber is laid along the direction of the cable to be tested to detect information such as the temperature of the cable to be tested. Generally, when the optical fiber is laid to the middle joint of the cable to be tested, the optical fiber is fixed with tape. However, the use environment of the middle joint of the cable is often harsh, which can easily cause the tape to debond, and then cause the optical fiber to fall off, affecting the optical fiber's detection of the middle joint of the cable to be tested. Summary of the invention

[0004] Based on this, it is necessary to provide an optical fiber fixing structure that can effectively prevent the optical fiber from falling off.

[0005] An optical fiber fixing structure, comprising:

[0006] A first half shell has a first inner wall extending along a first direction; the first half shell has a first butt joint surface adjacent to the first inner wall and extending along the first direction; along the first direction, two ends of the first half shell are respectively a first end and a second end;

[0007] Two first sealing members are respectively sealed and connected to the inner wall of the first end and the inner wall of the second end of the first half shell;

[0008] The second half shell has a second inner wall extending along the first direction; the first inner wall and the second inner wall enclose a receiving cavity; the second half shell has a second docking surface adjacent to the second inner wall and aligned and sealed with the first docking surface, and the second docking surface and the first docking surface are separable; along the first direction, the two ends of the second half shell are respectively a third end and a fourth end; and

[0009] Two second sealing members are respectively sealed and connected to the inner wall of the third end and the inner wall of the fourth end of the second half shell; the first sealing member and the second sealing member at the corresponding end form a cable through hole along the first direction.

[0010] The optical fiber fixing structure can place the middle joint of the cable to be tested in the accommodating cavity, and also pass the optical fiber used to detect the middle joint of the cable in the sealed accommodating cavity, thereby preventing the optical fiber from falling off due to the harsh environment.

[0011] In one embodiment, the first inner wall is provided with a plurality of first wire grooves, and the second inner wall is provided with a plurality of second wire grooves; the first wire grooves and the second wire grooves are connected with each other at intervals, and the connection between the first wire grooves and the second wire grooves is smoothly transitioned.

[0012] In one embodiment, the accommodating cavity is a cylindrical cavity; along the first direction, the axis of the cable penetration hole is colinear with the axis of the accommodating cavity.

[0013] In one of the embodiments, at least one clamping section is provided on each of the first wire trough and the second wire trough; and the cross-sectional area of ​​the clamping section is smaller than the cross-sectional area of ​​other positions of the wire trough.

[0014] In one embodiment, a first rotating shaft is provided on a side of the first half shell away from the first docking surface, and a second rotating shaft coaxial with the first rotating shaft is provided on an end of the second half shell away from the second docking surface. The first rotating shaft and the second rotating shaft are arranged axially and rotatably connected.

[0015] In one embodiment, a first sealing layer is disposed on the first abutting surface, and a second sealing layer is disposed on the second abutting surface.

[0016] In one embodiment, the first sealing member and / or the second sealing member is a rubber sealing member.

[0017] In one embodiment, the outer side surface of the first sealing member is provided with at least one first arc-shaped protrusion, and the first inner wall of the first half shell is provided with a first groove matching the first arc-shaped protrusion;

[0018] The outer side surface of the second sealing member is provided with at least one second arc-shaped protrusion corresponding to the first arc-shaped protrusion one by one, and the second inner wall of the second half shell is provided with a second groove corresponding to the second arc-shaped protrusion;

[0019] The corresponding first arc-shaped protrusion and the second arc-shaped protrusion are connected to form an annular protrusion.

[0020] In one embodiment, the first end and the second end of the first half shell are both sealed and connected with a first sealing end head; the two first sealing members are respectively sealed and connected with the first sealing end heads at the corresponding ends;

[0021] The third end and the fourth end of the second half shell are both sealed and connected with a second sealing end head; the two second sealing members are respectively sealed and connected with the second sealing end heads at the corresponding ends;

[0022] The distance between the inner wall of the first sealing end head and the central axis of the accommodating chamber along the first direction is smaller than the distance between the first inner wall and the central axis of the accommodating chamber along the first direction, and the first sealing component is in contact with the end faces at both ends of the first half shell; the distance between the inner wall of the second sealing end head and the central axis of the accommodating chamber along the first direction is smaller than the distance between the second inner wall and the central axis of the accommodating chamber along the first direction, and the second sealing component is in contact with the end faces at both ends of the second half shell.

[0023] In one embodiment, the second sealing member is provided with an optical fiber through hole penetrating the second sealing member along a first direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of an optical fiber fixing structure provided by an embodiment of the present invention.

[0025] Figure 2 for Figure 1 Right view of the optical fiber fixing structure.

[0026] Figure 3 for Figure 1 Rear view of the optical fiber fixing structure.

[0027] Figure 4 for Figure 1 Schematic diagram of the partial structure of the first inner wall of the first half shell.

[0028] Figure 5 for Figure 1 A partial cross-sectional view of the optical fiber fixing structure shown.

[0029] Figure 6 To place the middle joint part of the cable to be tested and the optical fiber used to detect the middle joint part of the cable Figure 1 A schematic diagram of the optical fiber fixing structure after being placed in the cavity is shown.

[0030] 100, optical fiber fixing structure; 110, first half shell; 111, first inner wall; 1111, first wire groove; 113, first end; 112, first docking plate; 114, first sealing end; 115, second end; 116, first groove; 117, first docking surface; 118, first sealing layer; 119, first rotating shaft; 130, first sealing member; 131, first arc-shaped protrusion; 150, second half shell; 151, second inner wall; 1 511, second wire groove; 153, third end; 152, second docking plate; 154, second sealing end; 155, fourth end; 156, second groove; 157, second docking surface; 158, second sealing layer; 159, second rotating shaft; 170, second sealing member; 171, second arc-shaped protrusion; 10, accommodating cavity; 20, cable perforation; 30, snap-in section; 40, optical fiber perforation; 50, cable; 60, optical fiber; aa, first direction. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] like Figures 1 to 5As shown, an optical fiber fixing structure 100 provided by an embodiment of the present invention comprises a first half shell 110, two first sealing members 130, a second half shell 150 and two second sealing members 170. Specifically, the first half shell 110 has a first inner wall 111 extending along a first direction aa. The first half shell 110 has a first butt joint surface 117 adjacent to the first inner wall 111 and extending along the first direction aa. Along the first direction aa, the two ends of the first half shell 110 are respectively a first end 113 and a second end 115. The two first sealing members 130 are respectively sealedly connected to the inner wall of the first end 113 and the inner wall of the second end 115 of the first half shell 110, that is, the two first sealing members 130 are respectively sealedly connected to the two ends of the first inner wall 111. The second half shell 150 has a second inner wall 151 extending along the first direction aa. The first inner wall 111 and the second inner wall 151 enclose a receiving cavity 10. The second half shell 150 has a second butt joint surface 157 adjacent to the second inner wall 151 and aligned with the first butt joint surface 117 for sealing, and the second butt joint surface 157 and the first butt joint surface 117 are separable; along the first direction aa, the two ends of the second half shell 150 are respectively the third end 153 and the fourth end 155. The two second seals 170 are respectively sealed and connected to the inner wall of the third end 153 and the inner wall of the fourth end 155 of the second half shell 150, that is, the two second seals 170 are respectively sealed and connected to the two ends of the second inner wall 151. The first seal 130 and the second seals 170 at the corresponding end surround a cable through hole 20 along the first direction aa.

[0035] The second mating surface 157 and the first mating surface 117 are separable, so that the accommodating cavity 10 can be opened and the cables and optical fibers can be placed in the accommodating cavity 10 from the side.

[0036] It should be noted that the first half shell 110 and the second half shell 150 are hard shells.

[0037] The optical fiber fixing structure 100 can place the middle joint of the cable to be tested in the accommodating chamber 10, and the optical fiber used to detect the middle joint of the cable is also inserted into the sealed accommodating chamber 10. This prevents the optical fiber from falling off due to the harsh environment. Furthermore, it also reduces the maintenance time of the operator on the cable placed in the sealed accommodating chamber 10, reducing the maintenance cost.

[0038] Furthermore, the optical fiber fixing structure 100 is used to place the optical fiber used to detect the middle joint of the cable in the accommodating cavity 10, thereby preventing the temperature or moisture in the harsh environment from affecting the optical fiber detection result, that is, the accuracy of the optical fiber detection result can be improved.

[0039] Furthermore, placing the middle joint portion of the cable to be tested in the accommodating chamber 10 can prevent the middle portion of the cable from being corroded by a harsh environment, thereby better ensuring the operation of the line.

[0040] In this embodiment, the first half shell 110 is provided with a first docking plate 112 corresponding to the first docking surface 117, and the second half shell 150 is provided with a second docking plate 152 corresponding to the second docking surface 157. The first docking plate 112 and the second docking plate 152 are fixed by threaded connection to achieve sealing and fitting of the first docking surface 117 and the second docking surface 157.

[0041] In this embodiment, the first inner wall 111 is provided with a plurality of first wire grooves 1111, and the second inner wall 151 is provided with a plurality of second wire grooves 1511. The first wire grooves 1111 and the second wire grooves 1511 are connected at intervals, and the connection between the first wire grooves 1111 and the second wire grooves 1511 is smoothly transitioned, thereby forming a complete wire groove for accommodating optical fibers, so that the optical fibers placed in the accommodating cavity 10 can be placed in the wire grooves, thereby ensuring the neatness and uniformity of the optical fiber laying and improving the accuracy of the optical fiber detection results.

[0042] Furthermore, in this embodiment, the accommodating cavity 10 is a cylindrical cavity. And, along the first direction aa, the axis of the cable through hole 20 is colinear with the axis of the accommodating cavity 10. Thus, the optical fiber can be evenly and symmetrically laid around the middle joint portion of the cable to be tested, thereby improving the accuracy of the optical fiber detection result.

[0043] Of course, in other feasible embodiments, the accommodating cavity 10 is not limited to a cylindrical cavity, but may also be an elliptical cavity or other regular or irregular shapes.

[0044] In this embodiment, at least one clamping section 30 is provided on each of the first wire groove 1111 and the second wire groove 1511. The cross-sectional area of ​​the clamping section 30 is smaller than the cross-sectional area of ​​other positions of the wire groove. Figure 4 The structure of the clamping section 30 on the second wire slot 1511 is the same and is not shown separately. The setting of the clamping section 30 can clamp the optical fiber in the clamping section 30 at the corresponding position. Thereby, the optical fiber can be fixed in the wire slot.

[0045] Of course, in another feasible embodiment, the clamping section may not be provided, and the optical fiber may be fixed in the wire slot by adhesive tape or other limiting means.

[0046] In this embodiment, the first wire groove 1111 and the second wire groove 1511 are connected at intervals to form a spiral groove.

[0047] In this embodiment, a first rotating shaft is provided on one side of the first half shell away from the first docking surface, and a second rotating shaft coaxial with the first rotating shaft is provided on one end of the second half shell away from the second docking surface, and the first rotating shaft and the second rotating shaft are arranged axially and rotatably connected. Thus, the first docking surface and the second docking surface can be attached or separated by relative rotation of the first rotating shaft and the second rotating shaft.

[0048] In this embodiment, a first sealing layer 118 is provided on the first butt joint surface 117, and a second sealing layer 158 is provided on the second butt joint surface 157. Thus, the first butt joint surface 117 and the second butt joint surface 157 are sealed and fitted. Of course, in other feasible implementations, the first butt joint surface 117 and the second butt joint surface 157 can also be sealed in other ways, such as by providing sealing pads on the first butt joint surface 117 and the second butt joint surface 157.

[0049] In this embodiment, the first sealing layer 118 and the second sealing layer 158 are both rubber sealing layers. It is understood that in other feasible embodiments, the first sealing layer 118 and the second sealing layer 158 are not limited to rubber sealing layers, but can also be sealing layers formed of other materials.

[0050] In this embodiment, the first seal 130 and the second seal 170 are rubber seals. Of course, in other feasible embodiments, the first seal 130 and the second seal 170 are not limited to rubber seals, but can also be made of other materials that can achieve sealing.

[0051] In this embodiment, at least one first arc-shaped protrusion 131 is provided on the outer side of the first sealing member 130, and a first groove 116 matching the first arc-shaped protrusion 131 is provided on the first inner wall 111 of the first half shell 110. At least one second arc-shaped protrusion 171 corresponding to the first arc-shaped protrusion 131 is provided on the outer side of the second sealing member 170, and a second groove 156 matching the second arc-shaped protrusion 171 is provided on the second inner wall 151 of the second half shell 150; the corresponding first arc-shaped protrusion 131 and the second arc-shaped protrusion 171 are connected to form an annular protrusion. Thus, the sealing performance of the accommodating chamber 10 is better guaranteed, and the erosion of moisture and the like from the outside is prevented from entering the accommodating chamber 10.

[0052] Further, in this embodiment, the first end 113 and the second end 115 of the first half shell 110 are both sealedly connected with the first sealing end head 114; the two first sealing members 130 are respectively sealedly connected with the first sealing end heads 114 of the corresponding ends; the third end 153 and the fourth end 155 of the second half shell 150 are both sealedly connected with the second sealing end heads 154; the two second sealing members 170 are respectively sealedly connected with the second sealing end heads 154 of the corresponding ends. Correspondingly, the first groove 116 is provided on the inner wall of the first sealing end head 114, and the second groove 156 is provided on the inner wall of the second sealing end head 154. The lengths of the first sealing end head 114 and the second sealing end head 154 along the first direction aa are relatively short, so that the first groove 116 and the second groove 156 are formed on the first sealing end head 114 and the second sealing end head 154, respectively.

[0053] Further, in this embodiment, the distance between the inner wall of the first sealing end head 114 and the central axis of the accommodating chamber 10 along the first direction aa is smaller than the distance between the first inner wall 111 and the central axis of the accommodating chamber 10 along the first direction aa, and the first sealing member 130 is in contact with the end surfaces of both ends of the first half shell 110. The distance between the inner wall of the second sealing end head 154 and the central axis of the accommodating chamber 10 along the first direction aa is smaller than the distance between the second inner wall 151 and the central axis of the accommodating chamber 10 along the first direction aa, and the second sealing member 170 is in contact with the end surfaces of both ends of the second half shell 150. Thus, the sealing performance of the accommodating chamber 10 is further ensured.

[0054] Optionally, in another feasible embodiment, the first sealing end head and the first half shell are integrally formed, and the second sealing end head and the second half shell are integrally formed.

[0055] In this embodiment, the second sealing member 170 is provided with an optical fiber through hole 40 that penetrates the second sealing member 170 along the first direction aa. Thus, the optical fiber can be inserted into the accommodating cavity 10 from the optical fiber through hole. The specific size of the optical fiber through hole matches the diameter of the optical fiber. Of course, if the optical fiber through hole is large, the optical fiber can also be coated with a sealing material to achieve a sealed contact between the optical fiber and the side wall of the optical fiber through hole, thereby ensuring the sealing performance in the accommodating cavity 10.

[0056] Specifically, the middle joint part of the cable 50 to be tested and the optical fiber 60 for detecting the middle joint part of the cable are placed in the accommodating cavity. Figure 6 shown.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. An optical fiber fixing structure, characterized in that: include: A first half shell having a first inner wall extending along a first direction; the first half shell having a first abutting surface adjacent to the first inner wall and extending along the first direction; Along the first direction, two ends of the first half shell are respectively a first end and a second end; Two first sealing members are respectively sealed and connected to the inner wall of the first end and the inner wall of the second end of the first half shell; The second half shell has a second inner wall extending along the first direction; the first inner wall and the second inner wall enclose a receiving cavity; the second half shell has a second docking surface adjacent to the second inner wall and aligned and sealed with the first docking surface, and the second docking surface and the first docking surface are separable; along the first direction, the two ends of the second half shell are respectively a third end and a fourth end; and Two second seals are respectively sealed and connected to the inner wall of the third end and the inner wall of the fourth end of the second half shell; the first seal and the second seal at the corresponding end form a cable through hole along the first direction; the first inner wall is provided with a plurality of first wire grooves, and the second inner wall is provided with a plurality of second wire grooves; the wire groove formed by the first wire grooves and the second wire grooves being connected at intervals is spiral-shaped, and the connection between the first wire grooves and the second wire grooves is smoothly transitioned; the accommodating cavity is a cylindrical cavity; along the first direction, the axis of the cable through hole is colinear with the axis of the accommodating cavity; at least one clamping section is provided on the first wire groove and the second wire groove; the cross-sectional area of ​​the clamping section is smaller than the cross-sectional area of ​​other positions of the wire groove; the second seal is provided with an optical fiber through hole that passes through the second seal along the first direction.

2. The optical fiber fixing structure according to claim 1, characterized in that: A first rotating shaft is provided on one side of the first half shell away from the first docking surface, and a second rotating shaft coaxial with the first rotating shaft is provided on one end of the second half shell away from the second docking surface. The first rotating shaft and the second rotating shaft are arranged axially and rotatably connected.

3. The optical fiber fixing structure according to claim 1, characterized in that: A first sealing layer is disposed on the first butt joint surface, and a second sealing layer is disposed on the second butt joint surface.

4. The optical fiber fixing structure according to claim 1, characterized in that: The first sealing member and / or the second sealing member is a rubber sealing member.

5. The optical fiber fixing structure according to claim 1, characterized in that: The outer side surface of the first sealing member is provided with at least one first arc-shaped protrusion, and the first inner wall of the first half shell is provided with a first groove matching the first arc-shaped protrusion; The outer side surface of the second sealing member is provided with at least one second arc-shaped protrusion corresponding to the first arc-shaped protrusion one by one, and the second inner wall of the second half shell is provided with a second groove corresponding to the second arc-shaped protrusion; The corresponding first arc-shaped protrusion and the second arc-shaped protrusion are connected to form an annular protrusion.

6. The optical fiber fixing structure according to claim 1, characterized in that: The first end and the second end of the first half shell are both sealedly connected with a first sealing end head; the two first sealing members are respectively sealedly connected with the first sealing end heads at the corresponding ends; The third end and the fourth end of the second half shell are both sealed and connected with a second sealing end head; the two second sealing members are respectively sealed and connected with the second sealing end heads at the corresponding ends; The distance between the inner wall of the first sealing end head and the central axis of the accommodating chamber along the first direction is smaller than the distance between the first inner wall and the central axis of the accommodating chamber along the first direction, and the first sealing component is in contact with the end faces at both ends of the first half shell; the distance between the inner wall of the second sealing end head and the central axis of the accommodating chamber along the first direction is smaller than the distance between the second inner wall and the central axis of the accommodating chamber along the first direction, and the second sealing component is in contact with the end faces at both ends of the second half shell.

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