CN111025510A - Optical fiber fixing structure - Google Patents

Abstract

The present invention relates to an optical fiber fixing structure, which includes: a first half shell having a first inner wall extending in a first direction; the first half shell is provided with a first butting surface which is adjacent to the first inner wall and extends along the first direction; along the first direction, two ends of the first half shell are respectively a first end and a second end; the two first sealing pieces are respectively connected with the inner wall of the first end and the inner wall of the second end of the first half shell in a sealing way; a second housing half having a second inner wall extending in a first direction; the first inner wall and the second inner wall enclose an accommodating cavity; the second half shell is provided with a second butting surface which is abutted with the second inner wall and is aligned and sealed with the first butting surface, and the second butting surface and the first butting surface can be separated; along the first direction, the two ends of the second half shell are respectively a third end and a fourth end; the two second sealing pieces are respectively connected with the inner wall of the third end and the inner wall of the fourth end of the second half shell in a sealing way; the first sealing element and the second sealing element at the corresponding end enclose a cable perforation along the first direction.

Description

Optical fiber fixing structure

Technical Field

The invention relates to the field of electric power, in particular to an optical fiber fixing structure.

Background

The optical fiber sensing technology is a new sensing technology accompanied with the development of optical fiber and optical fiber communication technology. Is the fastest high-tech application technology internationally developed since the middle of the 70 s of the 20 th century. The optical fiber sensing technology is mainly divided into two types in the market at present, wherein one type is a sensor directly using an optical fiber, and the other type is a sensor based on a grating. Fiber optic sensors are essentially different from electrical based sensors. The optical fiber sensor uses light as a carrier of sensitive information and uses optical fiber as a medium for transmitting the sensitive information, and the optical fiber sensor is widely applied due to the unique characteristics.

Conventionally, in a structure such as an installation cabinet, the optical fiber is laid along the direction of the cable to be detected, so as to detect information such as the temperature of the cable to be detected. Generally, when an optical fiber is laid to an intermediate joint of a cable to be tested, the optical fiber is fixed by an adhesive tape. However, the service environment of the middle joint of the cable is often severe, which easily causes the adhesive tape to be debonded, and further causes the optical fiber to fall off, thereby affecting the detection of the optical fiber on the middle joint of the cable to be detected.

Disclosure of Invention

Accordingly, there is a need for an optical fiber fixing structure that can effectively prevent the optical fiber from falling off.

An optical fiber fixing structure comprising:

a first half shell having a first inner wall extending in a first direction; the first half shell is provided with a first butting surface which is adjacent to the first inner wall and extends along the first direction; along a first direction, two ends of the first half shell are respectively a first end and a second end;

the two first sealing pieces are respectively connected with the inner wall of the first end and the inner wall of the second end of the first half shell in a sealing way;

a second housing half having a second inner wall extending in a first direction; the first inner wall and the second inner wall enclose an accommodating cavity; the second half shell is provided with a second butting surface which is abutted with the second inner wall and is aligned and sealed with the first butting surface, and the second butting surface and the first butting surface can be separated; along the first direction, two ends of the second half shell are respectively a third end and a fourth end; and

the two second sealing pieces are respectively connected with the inner wall of the third end and the inner wall of the fourth end of the second half shell in a sealing way; the first sealing element and the second sealing element of the corresponding end enclose a cable perforation along a first direction.

According to the optical fiber fixing structure, the middle joint part of the cable to be detected can be arranged in the accommodating cavity, and the optical fiber for detecting the middle joint part of the cable also penetrates through the sealed accommodating cavity. Thereby avoiding the optical fiber from falling off under the influence of severe environment.

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 groove and the second wire groove are connected at intervals, and the connection part of the first wire groove and the second wire groove is in smooth transition.

In one embodiment, the accommodating cavity is a cylindrical cavity; in the first direction, an axis of the cable through hole is collinear with an axis of the accommodating cavity.

In one embodiment, the first wire duct and the second wire duct are both provided with at least one clamping section; the cross-sectional area of the clamping section is smaller than that of the other positions of the wire groove.

In one embodiment, a first rotating shaft is disposed on a side of the first half shell away from the first abutting surface, a second rotating shaft coaxial with the first rotating shaft is disposed on an end of the second half shell away from the second abutting surface, and the first rotating shaft and the second rotating shaft are axially arranged and rotatably connected.

In one embodiment, a first sealant layer is disposed on the first mating surface, and a second sealant layer is disposed on the second mating surface.

In one embodiment, the first seal and/or the second seal is a rubber seal.

In one embodiment, the outer side surface of the first sealing element 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 matched with the first arc-shaped protrusion;

the outer side surface of the second sealing element is provided with at least one second arc-shaped protrusion which is in one-to-one correspondence with the first arc-shaped protrusion, and the second inner wall of the second half shell is provided with a second groove which is in one-to-one correspondence with the second arc-shaped protrusion;

the corresponding first arc-shaped bulge and the second arc-shaped bulge are butted to form an annular bulge.

In one embodiment, a first sealing end is hermetically connected to each of the first end and the second end of the first half shell; the two first sealing elements are respectively connected with the first sealing end heads at the corresponding ends in a sealing manner;

the third end and the fourth end of the second half shell are both connected with a second sealing end head in a sealing mode; the two second sealing pieces are respectively connected with the second sealing end heads at the corresponding ends in a sealing manner;

the distance from the inner wall of the first sealing end to the central axis of the containing cavity along the first direction is smaller than the distance from the first inner wall to the central axis of the containing cavity along the first direction, and the first sealing element is attached to the end faces of the two ends of the first half shell; the distance between the inner wall of the second sealing end and the central shaft of the containing cavity along the first direction is smaller than the distance between the second inner wall and the central shaft of the containing cavity along the first direction, and the second sealing piece is attached to the end faces of the two ends of the second half shell.

In one embodiment, the second seal is provided with a fiber perforation extending through the second seal in a first direction.

Drawings

Fig. 1 is a cross-sectional view of an optical fiber fixing structure according to an embodiment of the present invention.

Fig. 2 is a right side view of the optical fiber fixing structure of fig. 1.

Fig. 3 is a rear view of the optical fiber fixing structure of fig. 1.

Fig. 4 is a partial structural view of the first inner wall of the first half-shell in fig. 1.

Fig. 5 is a partial sectional view of the optical fiber fixing structure shown in fig. 1.

Fig. 6 is a schematic diagram of the intermediate joint part of the cable to be tested and the optical fiber for detecting the intermediate joint part of the cable after being placed in the accommodating cavity of the optical fiber fixing structure shown in fig. 1.

100. An optical fiber fixing structure; 110. a first half shell; 111. a first inner wall; 1111. a first wire slot; 113. a first end; 112. a first butt plate; 114. a first sealed end; 115. a second end; 116. a first groove; 117. a first mating surface; 118. a first sealing layer; 119. a first rotating shaft; 130. a first seal member; 131. a first arc-shaped protrusion; 150. a second half shell; 151. a second inner wall; 1511. a second wire slot; 153. a third end; 152. a second butt joint plate; 154. a second sealed end; 155. a fourth end; 156. a second groove; 157. a second mating surface; 158. a second sealing layer; 159. a second rotating shaft; 170. a second seal member; 171. a second arc-shaped protrusion; 10. an accommodating cavity; 20. perforating a cable; 30. a clamping section; 40. perforating the optical fiber; 50. a cable; 60. an optical fiber; a-a, a first direction.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 5, an optical fiber fixing structure 100 according to an embodiment of the present invention includes a first half shell 110, two first sealing members 130, a second half shell 150, and two second sealing members 170. In particular, the first half-shell 110 has a first inner wall 111 extending in the first direction a-a. The first half shell 110 has a first abutting surface 117 abutting the first inner wall 111 and extending along the first direction a-a, and the first and second ends 113 and 115 of the first half shell 110 are respectively located at two ends along the first direction a-a. The two first sealing members 130 are respectively connected with the inner wall of the first end 113 and the inner wall of the second end 115 of the first half shell 110 in a sealing manner, i.e. the two first sealing members 130 are respectively connected with the two ends of the first inner wall 111 in a sealing manner. The second half shell 150 has a second inner wall 151 extending in the first direction a-a. The first inner wall 111 and the second inner wall 151 enclose the accommodating chamber 10. The second housing half 150 has a second abutment surface 157 abutting the second inner wall 151 and in aligned sealing engagement with the first abutment surface 117, the second abutment surface 157 being separable from the first abutment surface 117; along the first direction a-a, the second half shell 150 has a third end 153 and a fourth end 155, respectively. The two second sealing members 170 are respectively connected with the inner wall of the third end 153 and the inner wall of the fourth end 155 of the second half shell 150 in a sealing manner, i.e. the two second sealing members 170 are respectively connected with the two ends of the second inner wall 151 in a sealing manner. The first seal 130 encloses with said second seal 170 of the corresponding end a cable perforation 20 in a first direction a-a.

The second abutment surface 157 is separable from said first abutment surface 117 so that the housing chamber 10 can be opened to place the cables and optical fibres into the housing chamber 10 from the side.

It should be noted that the first half shell 110 and the second half shell 150 are rigid shells.

The optical fiber fixing structure 100 may place the middle joint portion of the cable to be tested in the accommodating chamber 10, and pass the optical fiber for detecting the middle joint portion of the cable through the accommodating chamber 10. Thereby avoiding the optical fiber from falling off under the influence of severe environment. Furthermore, the maintenance time of the cable placed in the sealed accommodating cavity 10 by an operator is reduced, and the maintenance cost is reduced.

Furthermore, the optical fiber fixing structure 100 places the optical fiber for detecting the middle joint portion of the cable in the accommodating cavity 10, so as to avoid the temperature or moisture in the harsh environment from affecting the detection result of the optical fiber, i.e. improve the accuracy of the detection result of the optical fiber.

Moreover, the middle joint part of the cable to be tested is arranged in the accommodating cavity 10, so that the corrosion of the middle part of the cable caused by severe environment can be prevented, and the operation of the circuit can be better ensured.

In this embodiment, the first housing half 110 has a first engaging plate 112 corresponding to the first engaging surface 117, and the second housing half 150 has a second engaging plate 152 corresponding to the second engaging surface 157. The first docking plate 112 and the second docking plate 152 are secured by a threaded connection to achieve a sealing engagement of the first docking surface 117 and the second docking surface 157.

In this embodiment, the first inner wall 111 has a plurality of first wire grooves 1111, and the second inner wall 151 has a plurality of second wire grooves 1511. First line groove 1111 and second line groove 1511 interval link up, and the smooth transition of linking department of first line groove 1111 and second line groove 1511 to form the complete wire casing that is used for the holding optic fibre, so that arrange the optic fibre in holding chamber 10 and can arrange the wire casing in, thereby guarantee the regularity and the homogeneity that optic fibre laid, improve the accuracy of optic fibre testing result.

Further, in this embodiment, the accommodating chamber 10 is a cylindrical chamber. And, along the first direction a-a, the axis of the cable through hole 20 is collinear with the axis of the accommodation chamber 10. Therefore, the optical fibers can be uniformly and symmetrically laid around the middle joint part of the cable to be detected, and the accuracy of the optical fiber detection result is improved.

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

In this embodiment, at least one clamping section 30 is disposed on each of the first slot 1111 and the second slot 1511. The cross-sectional area of the clamping section 30 is smaller than the cross-sectional area of the other positions of the raceway. The structure of the clamping section 30 on the first wire slot 1111 is shown in fig. 4. The structure of the clamping segment 30 on the second wire groove 1511 is the same and is not further illustrated. The clamping section 30 is configured to clamp the optical fiber in the clamping section 30 at a corresponding position. Thereby ensuring that the optical fiber is fixed in the wire groove.

Of course, in other possible embodiments, the optical fiber may be fixed in the trunking by using an adhesive tape or other limiting means without providing a clamping section.

In this embodiment, the first slot 1111 and the second slot 1511 are spirally formed by the slots.

In this embodiment, a first rotating shaft is disposed on a side of the first half shell away from the first mating surface, a second rotating shaft coaxial with the first rotating shaft is disposed on an end of the second half shell away from the second mating surface, and the first rotating shaft and the second rotating shaft are axially arranged and rotatably connected. Therefore, the first butt joint surface and the second butt joint surface can be attached or separated through the relative rotation of the first rotating shaft and the second rotating shaft.

In this embodiment, the first sealing layer 118 is disposed on the first abutting surface 117, and the second sealing layer 158 is disposed on the second abutting surface 157. Thereby effecting a sealing engagement of first abutment surface 117 and second abutment surface 157. Of course, in other possible implementations, the first abutting surface 117 and the second abutting surface 157 may be sealed by other means, such as providing a gasket on the first abutting surface 117 and the second abutting surface 157.

In this embodiment, the first sealant 118 and the second sealant 158 are both rubber sealants. It is understood that in other possible embodiments, the first and second sealing layers 118, 158 are not limited to rubber sealing layers, but may be sealing layers formed of other materials.

In this embodiment, the first and second seals 130 and 170 are rubber seals. Of course, in other possible embodiments, the first and second seals 130, 170 are not limited to rubber seals, but may be made of other materials that achieve sealing.

In this embodiment, at least one first arc-shaped protrusion 131 is disposed on the outer side surface of the first sealing member 130, and the first inner wall 111 of the first half shell 110 is disposed with a first groove 116 matching with the first arc-shaped protrusion 131. At least one second arc-shaped protrusion 171 corresponding to the first arc-shaped protrusion 131 one by one is disposed on the outer side surface of the second sealing member 170, and a second groove 156 corresponding to the second arc-shaped protrusion 171 is disposed 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 butted to form an annular protrusion. Thereby better guaranteeing the sealing performance of the accommodating cavity 10 and preventing external moisture and the like from corroding and entering the accommodating cavity 10.

Further, in this embodiment, the first end 113 and the second end 115 of the first half shell 110 are both sealingly connected with a first sealing end 114; the two first sealing elements 130 are respectively connected with the first sealing end heads 114 at the corresponding ends in a sealing manner; a second sealing end 154 is hermetically connected to both the third end 153 and the fourth end 155 of the second half shell 150; the two second sealing members 170 are respectively connected with the second sealing end heads 154 at the corresponding ends in a sealing manner. Accordingly, the first groove 116 is disposed on an inner wall of the first sealing tip 114 and the second groove 156 is disposed on an inner wall of the second sealing tip 154. The first sealing tip 114 and the second sealing tip 154 have a relatively small length along the first direction a-a to facilitate forming the first groove 116 and the second groove 156 in the first sealing tip 114 and the second sealing tip 154, respectively.

Further, in this embodiment, a distance between the inner wall of the first seal end 114 and the central axis of the accommodating cavity 10 along the first direction a-a is less than a distance between the first inner wall 111 and the central axis of the accommodating cavity 10 along the first direction a-a, and the first sealing element 130 is attached to the end surfaces of the first half shell 110. The distance from the inner wall of the second sealing end 154 to the central axis of the accommodating cavity 10 along the first direction a-a is less than the distance from the second inner wall 151 to the central axis of the accommodating cavity 10 along the first direction a-a, and the second sealing member 170 is attached to the end surfaces of the two ends of the second half shell 150. Thereby further ensuring the sealing performance of the accommodating chamber 10.

Alternatively, in another possible embodiment, the first sealing end is integrally formed with the first half shell and the second sealing end is integrally formed with the second half shell.

In this embodiment, the second encapsulant 170 is provided with a fiber perforation 40 extending through the second encapsulant 170 in a first direction a-a. So that the optical fiber can be inserted into the accommodating chamber 10 from the optical fiber penetration hole. The size of the particular fiber perforation is matched to the diameter of the fiber. Of course, if the optical fiber through hole is large, the optical fiber can be in sealing contact with the side wall of the optical fiber through hole by coating the optical fiber with a sealing material, so as to ensure the sealing performance in the accommodating cavity 10.

Specifically, a schematic diagram after placing the intermediate joint part of the cable 50 to be tested and the optical fiber 60 for inspecting the intermediate joint part of the cable in the accommodation chamber is shown in fig. 6.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An optical fiber fixing structure, comprising:

a first half shell having a first inner wall extending in a first direction; the first half shell is provided with a first butting surface which is adjacent to the first inner wall and extends along the first direction; along a first direction, two ends of the first half shell are respectively a first end and a second end;

the two first sealing pieces are respectively connected with the inner wall of the first end and the inner wall of the second end of the first half shell in a sealing way;

a second housing half having a second inner wall extending in a first direction; the first inner wall and the second inner wall enclose an accommodating cavity; the second half shell is provided with a second butting surface which is abutted with the second inner wall and is aligned and sealed with the first butting surface, and the second butting surface and the first butting surface can be separated; along the first direction, two ends of the second half shell are respectively a third end and a fourth end; and

the two second sealing pieces are respectively connected with the inner wall of the third end and the inner wall of the fourth end of the second half shell in a sealing way; the first sealing element and the second sealing element of the corresponding end enclose a cable perforation along a first direction.

2. The optical fiber fixing structure according to claim 1, wherein the first inner wall is provided with a plurality of first slots, and the second inner wall is provided with a plurality of second slots; the first wire groove and the second wire groove are connected at intervals, and the connection part of the first wire groove and the second wire groove is in smooth transition.

3. The optical fiber fixing structure according to claim 2, wherein the receiving cavity is a cylindrical cavity; in the first direction, an axis of the cable through hole is collinear with an axis of the accommodating cavity.

4. The optical fiber fixing structure according to claim 2 or 3, wherein at least one clamping section is arranged on each of the first and second wire grooves; the cross-sectional area of the clamping section is smaller than that of the other positions of the wire groove.

5. The optical fiber fixing structure according to claim 1, wherein a first rotating shaft is disposed on a side of the first half shell away from the first abutting surface, a second rotating shaft coaxial with the first rotating shaft is disposed on an end of the second half shell away from the second abutting surface, and the first rotating shaft and the second rotating shaft are axially arranged and rotatably connected.

6. The optical fiber fixing structure according to claim 1, wherein a first sealant is provided on the first mating surface, and a second sealant is provided on the second mating surface.

7. The optical fiber fixing structure according to claim 1, wherein the first sealing member and/or the second sealing member is a rubber sealing member.

8. The optical fiber fixing structure according to claim 1, wherein 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 matched with the first arc-shaped protrusion;

the outer side surface of the second sealing element is provided with at least one second arc-shaped protrusion which is in one-to-one correspondence with the first arc-shaped protrusion, and the second inner wall of the second half shell is provided with a second groove which is in one-to-one correspondence with the second arc-shaped protrusion;

the corresponding first arc-shaped bulge and the second arc-shaped bulge are butted to form an annular bulge.

9. The fiber fixation structure of claim 1, wherein a first sealing tip is sealingly attached to each of the first and second ends of the first housing half; the two first sealing elements are respectively connected with the first sealing end heads at the corresponding ends in a sealing manner;

the third end and the fourth end of the second half shell are both connected with a second sealing end head in a sealing mode; the two second sealing pieces are respectively connected with the second sealing end heads at the corresponding ends in a sealing manner;

the distance from the inner wall of the first sealing end to the central axis of the containing cavity along the first direction is smaller than the distance from the first inner wall to the central axis of the containing cavity along the first direction, and the first sealing element is attached to the end faces of the two ends of the first half shell; the distance between the inner wall of the second sealing end and the central shaft of the containing cavity along the first direction is smaller than the distance between the second inner wall and the central shaft of the containing cavity along the first direction, and the second sealing piece is attached to the end faces of the two ends of the second half shell.

10. The optical fiber fixing structure according to claim 1, wherein the second sealing member is provided with an optical fiber penetration hole penetrating the second sealing member in the first direction.

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