CN215725994U - Distributed optical fiber temperature compensation section fixing and protecting device for tunnel structure monitoring - Google Patents
Distributed optical fiber temperature compensation section fixing and protecting device for tunnel structure monitoring Download PDFInfo
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- CN215725994U CN215725994U CN202121575607.4U CN202121575607U CN215725994U CN 215725994 U CN215725994 U CN 215725994U CN 202121575607 U CN202121575607 U CN 202121575607U CN 215725994 U CN215725994 U CN 215725994U
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Abstract
The utility model discloses a distributed optical fiber temperature compensation section fixing and protecting device for monitoring a tunnel structure, which comprises a temperature compensation box, a waterproof rubber plug, a rubber through hole, an elastic ring and a winding ring, wherein: the temperature compensation box comprises an upper box body and a lower box body; openings are respectively formed in the two sides of the lower box body, and the waterproof rubber plugs are arranged in the openings; a rubber through hole is formed in the middle of the waterproof rubber plug; the elastic ring is hinged and connected by four truss rods and is fixed in the lower box body, the upper end of the elastic ring is welded on the lower box body, the other three ends are arranged in the bolt slide way, so that the elastic ring can have certain deformation, and the optical fiber is tensioned or loosened through the deformation; the winding ring is hinged and connected by a plurality of truss rods and is fixed in the upper box body; the number of the elastic rings is two, and the two elastic rings are respectively positioned below the wire inlet end and the wire outlet end of the winding ring. The utility model has simple integral structure principle, is convenient and practical, can be disassembled and reassembled, and can be repeatedly used.
Description
Technical Field
The utility model belongs to the field of tunnel structure safety monitoring, and relates to a protection device for a distributed Brillouin optical fiber used for structural health monitoring in a tunnel in a temperature compensation section.
Background
With the massive construction of tunnels in China, the structural safety of the tunnel is very important for the safety of people and the smoothness of traffic. Therefore, an overall monitoring technology with large range, long distance and long duration is urgently needed, the distributed brillouin optical fiber sensor takes a common single-mode optical fiber used in optical fiber communication as a sensing medium, and since the optical fiber is the sensor, continuous measurement and monitoring in space can be realized, and the distributed brillouin optical fiber sensor is particularly suitable for performing overall monitoring on a subway segment tunnel with large range, long distance and long duration. The distributed Brillouin optical fiber sensor for monitoring the structure needs to be arranged close to a position which is a few centimeters below a tunnel segment buried track bed and along the direction of the tunnel, and a breakpoint can not exist. However, in the process of tunnel construction, a temperature compensation section needs to be arranged at a specific position according to regulations, the influence of temperature is planed out in data monitored by the tunnel, and the monitoring precision is improved. In addition, if the optical fiber of the temperature compensation section is exposed, the optical fiber is extremely easy to be damaged in the construction process, so that light waves cannot pass through or the light loss is large, and the monitoring data of tunnel deformation cannot be acquired.
Disclosure of Invention
In order to solve the problem that a distributed Brillouin optical fiber sensor for monitoring a subway tunnel structure is easily damaged in a temperature compensation section, the utility model provides a distributed optical fiber temperature compensation section fixing and protecting device for monitoring the tunnel structure.
The purpose of the utility model is realized by the following technical scheme:
the utility model provides a tunnel structure monitoring is with fixed protection device of distributed optical fiber temperature compensation section, includes temperature compensation box, waterproof rubber buffer, rubber through-wire hole, elasticity ring and winding ring, wherein:
the temperature compensation box comprises an upper box body and a lower box body;
openings are respectively formed in the two sides of the lower box body, and the waterproof rubber plugs are arranged in the openings;
the middle of the waterproof rubber plug is provided with a rubber through hole for an optical fiber to pass through;
the elastic ring is hinged and connected by four truss rods and is fixed in the lower box body, the upper end of the elastic ring is welded on the lower box body, the other three ends are arranged in the bolt slide way, so that the elastic ring can have certain deformation, and the optical fiber is tensioned or loosened through the deformation;
the winding ring is hinged and connected by a plurality of truss rods and is fixed in the upper box body;
the number of the elastic rings is two, and the two elastic rings are respectively positioned below the wire inlet end and the wire outlet end of the winding ring.
Compared with the prior art, the utility model has the following advantages:
1. the overall structure principle is simple, convenient and practical, can be disassembled and reassembled, and can be repeatedly used.
2. The internal structure is novel in form, and plays a certain protection role in the whole structure while realizing the temperature compensation function.
3. The whole structure is made of steel, the strength is high, and the service life is long.
4. The optical fiber can be adjusted according to the actual state in the tunnel, the temperature compensation is reasonably arranged, and the structure is more intelligent.
Drawings
FIG. 1 is a schematic structural diagram of a distributed optical fiber temperature compensation section fixing and protecting device for tunnel structure monitoring;
FIG. 2 is a schematic diagram of the operation of the distributed optical fiber temperature compensation section fixing and protecting device for monitoring the tunnel structure in the tunnel;
in the figure: 1-winding ring, 2-outer box fixing bolt, 3-optical fiber, 4-temperature compensation box, 5-outer box middle connecting bolt, 6-top fastening, 7-elastic ring, 8-bolt slideway, 9-elastic ring fixing rod, 10-temperature compensation protection device, 11-tunnel inner wall, 12-waterproof rubber plug.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
The utility model provides a distributed optical fiber temperature compensation section fixing and protecting device for monitoring a tunnel structure, which mainly comprises a temperature compensation box 4, a waterproof rubber plug 12, a rubber through hole, an elastic ring 7 and a winding ring 1, wherein as shown in figure 1:
the temperature compensation box 4 is an external whole box body, and other structures are all embedded into the temperature compensation box 4;
the temperature compensation box 4 comprises an upper box body and a lower box body, and the upper box body and the lower box body are connected through a middle connecting bolt 5 of the outer box;
a winding ring is arranged in the upper box body, and an elastic ring is arranged in the lower box body;
the two sides of the lower box body are respectively provided with an opening for the optical fiber 3 to pass in and out, and the lower box body is plugged by a waterproof rubber plug 12 after the internal installation is finished, so that external rainwater is prevented from entering the box body;
a rubber through hole is formed in the middle of the waterproof rubber plug 12, and optical fibers 3 can pass through the rubber through hole;
the elastic ring 7 is hinged by four truss rods, the elastic ring 7 is fixed in the lower box body through an elastic ring fixing rod 9, the upper end of the elastic ring is welded to the lower box body, the other three sides of the elastic ring 7 can enable the elastic ring 7 to have certain deformation after being fixed through a preset bolt slide way 8, and the optical fiber 3 is tensioned or loosened through the deformation;
the winding ring 1 is hinged by a plurality of truss rods and then fixed in the upper box body through a bolt in the middle, and the winding ring 1 can wind the optical fiber 3 with a certain length for many times.
The number of the elastic rings 7 is two, the number of the winding rings 1 is one, and the two elastic rings 7 are respectively positioned below the wire inlet end and the wire outlet end of the winding rings 1.
In the utility model, the temperature compensation box 4 provides a totally enclosed space for the compensation section optical fiber, and the temperature compensation section optical fiber can work normally in the temperature compensation section optical fiber. At temperature compensation box 4 both sides department, need place waterproof rubber buffer 12, can prevent to pour into the inside and then soak optical fiber sensor of shell with water in the concrete process of pouring. When the optical fiber 3 enters the temperature compensation box 4 from one side, firstly, the elastic ring 7 is arranged in the temperature compensation box 4, the elastic ring 7 is used for adjusting the tightness of the inner optical fiber 3, and the purpose can be realized by adjusting the truss rods. After passing through the elastic ring 7, the optical fiber 3 enters the inner winding ring 1, which is a temperature compensation section, and after winding, comes out from the elastic ring 7 on the other side, and continues to pass through the waterproof rubber plug 12 to complete the installation of the section. The tightness of the optical fiber 3 on the winding ring 1 can be continuously adjusted by adjusting the truss rods of the elastic ring 7, and finally, the whole device is installed on a wall through an external bolt.
In the utility model, the temperature compensation box 7, the elastic ring 7 and the winding ring 1 are made of steel; the waterproof rubber plug 12 and the rubber through hole are made of rubber, and the whole device is simple and convenient to use.
In the utility model, the use steps of the distributed optical fiber temperature compensation section fixing and protecting device for monitoring the tunnel structure are as follows:
(1) inserting the distributed Brillouin optical fiber sensor from one side of the temperature compensation box to enable the optical fiber in the temperature compensation box to be in a bent state;
(2) and then the optical fiber in the temperature compensation box passes through the elastic ring and penetrates out from the other side of the temperature compensation box after being wound by the elastic ring.
(3) The elastic ring inside the temperature compensation box is adjusted until the predetermined effect is reached.
(4) And (4) nailing the whole temperature compensation box onto the tunnel wall through an external bolt, thereby completing the installation of the whole temperature compensation section.
Claims (5)
1. The utility model provides a tunnel structure monitoring is with fixed protection device of distributed optical fiber temperature compensation section, its characterized in that the device includes temperature compensation box, waterproof rubber buffer, rubber through-wire hole, elasticity ring and winding ring, wherein:
the temperature compensation box comprises an upper box body and a lower box body;
openings are respectively formed in the two sides of the lower box body, and the waterproof rubber plugs are arranged in the openings;
the middle of the waterproof rubber plug is provided with a rubber through hole for an optical fiber to pass through;
the elastic ring is fixed in the lower box body;
the winding ring is fixed in the upper box body;
the number of the elastic rings is two, and the two elastic rings are respectively positioned below the wire inlet end and the wire outlet end of the winding ring.
2. The distributed optical fiber temperature compensation section fixing and protecting device for monitoring a tunnel structure according to claim 1, wherein the upper box body and the lower box body are connected by an outer box middle connecting bolt.
3. The distributed optical fiber temperature compensation section fixing and protecting device for monitoring the tunnel structure according to claim 1, wherein the elastic ring is fixed in the lower box body through an elastic ring fixing rod.
4. The distributed optical fiber temperature compensation section fixing and protecting device for monitoring the tunnel structure according to claim 1, wherein the elastic ring is formed by hinging and connecting four truss rods, the upper end of the elastic ring is welded on the lower box body, and the other three ends are arranged in the bolt slide way to enable the elastic ring to have a certain deformation, so that the optical fiber is tightened or loosened through the deformation.
5. The distributed optical fiber temperature compensation section fixing and protecting device for monitoring the tunnel structure according to claim 1, wherein the winding ring is formed by hinging and connecting a plurality of truss rods and is fixed in the upper box body through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121575607.4U CN215725994U (en) | 2021-07-12 | 2021-07-12 | Distributed optical fiber temperature compensation section fixing and protecting device for tunnel structure monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121575607.4U CN215725994U (en) | 2021-07-12 | 2021-07-12 | Distributed optical fiber temperature compensation section fixing and protecting device for tunnel structure monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215725994U true CN215725994U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121575607.4U Active CN215725994U (en) | 2021-07-12 | 2021-07-12 | Distributed optical fiber temperature compensation section fixing and protecting device for tunnel structure monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215725994U (en) |
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2021
- 2021-07-12 CN CN202121575607.4U patent/CN215725994U/en active Active
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