CN219935009U

CN219935009U - Fiber bragg grating sensor with heat insulation function

Info

Publication number: CN219935009U
Application number: CN202321438839.4U
Authority: CN
Inventors: 金芳; 朱国锋; 谢颖奇; 章伟; 斯晓青
Original assignee: Shanghai Pujiang Cable Co Ltd; Zhejiang Pujiang Cable Co Ltd
Current assignee: Shanghai Pujiang Cable Co Ltd; Zhejiang Pujiang Cable Co Ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-10-31
Anticipated expiration: 2033-06-07

Abstract

The utility model relates to the field of intelligent cables, in particular to a fiber grating sensor with a heat insulation function, which comprises a fiber grating sensor body, wherein a polyolefin protection tube is sleeved on a cable strand, a first refractory layer is arranged outside the polyolefin protection tube, a stainless steel tube is sleeved outside the first refractory layer, a second refractory layer is wound outside the stainless steel tube, and a fine wire mesh is coated outside the second refractory layer. According to the utility model, through the arrangement of the first fireproof layer and the second fireproof layer, the fiber grating sensor can be protected from being damaged by high temperature during hot casting of the anchor; according to the utility model, the structural fixation is realized by arranging the stainless steel tube and filling the aerogel, and the heat insulation capacity of the aerogel can be further improved.

Description

Fiber bragg grating sensor with heat insulation function

Technical Field

The utility model relates to the field of intelligent cables, in particular to a fiber bragg grating sensor with a heat insulation function.

Background

In order to detect the temperature and humidity conditions in the main cable strand with a longer length, an intelligent cable is designed, and the temperature, the humidity and the strain are detected through a fiber grating sensor arranged in the cable strand. The main cable strand is generally anchored by adopting a hot casting anchor, namely, molten zinc-copper alloy is poured into an anchor cup, the pouring temperature is 480+/-10 ℃, and the high temperature resistance of the optical fiber is poor, so that the optical fiber grating sensor is easy to damage during pouring, and the actual use effect is influenced.

Therefore, there is a need for an improvement in such a structure to overcome the above-mentioned drawbacks.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a fiber bragg grating sensor with a heat insulation function, which is realized by the following technical scheme:

the fiber bragg grating sensor with the heat insulation function comprises a fiber bragg grating sensor body, wherein a polyolefin protection tube is sleeved on a cable strand, a first fire-resistant layer is arranged outside the polyolefin protection tube, a stainless steel tube is further sleeved outside the first fire-resistant layer, a second fire-resistant layer is wound outside the stainless steel tube, and a fine wire mesh is wrapped outside the second fire-resistant layer.

The technical scheme is as follows: the fiber bragg grating sensor body is used for realizing a detection function; the polyolefin protective tube has good mechanical strength and good insulativity and is used for separating the fiber bragg grating sensor from the rest parts; the first refractory layer is used for fire prevention and heat insulation; the stainless steel tube is used for limiting the shape of the first refractory layer; the second refractory layer is used for fire prevention and heat insulation; the wire mesh is used to fix the shape of the second refractory layer.

The utility model is further provided with: the first refractory layer comprises a ceramic silica gel composite belt and basalt high-temperature-resistant wires, wherein the ceramic silica gel composite belt is wound around the polyolefin protection tube, and gaps between the ceramic silica gel composite belt are sewed by the basalt high-temperature-resistant wires.

The technical scheme is as follows: the ceramic silica gel composite belt plays a role in fireproof and heat insulation; the basalt high-temperature-resistant wire is used for sewing gaps of the ceramic silica gel composite belt, so that the heat insulation effect is prevented from being influenced due to the fact that the basalt high-temperature-resistant wire is scattered.

The utility model is further provided with: aerogel is filled in the stainless steel tube.

The technical scheme is as follows: the aerogel is used for playing a role in heat insulation, and other structures in the stainless steel pipe cannot move, so that a fixing effect is achieved.

The utility model is further provided with: the structure of the second refractory layer is consistent with that of the first refractory layer.

The technical scheme is as follows: the structure of the second refractory layer is consistent with that of the first refractory layer, so that the second refractory layer can also realize the functions of fire prevention and heat insulation.

The utility model discloses a fiber bragg grating sensor with a heat insulation function, which is compared with the prior art:

1. according to the utility model, through the arrangement of the first fireproof layer and the second fireproof layer, the fiber grating sensor can be protected from being damaged by high temperature during hot casting of the anchor;

2. according to the utility model, the structural fixation is realized by arranging the stainless steel tube and filling the aerogel, and the heat insulation capacity of the aerogel can be further improved.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

fig. 2 is a schematic view of a first refractory layer of the present utility model.

Corresponding part names are indicated by numerals and letters in the drawings: 10-a fiber bragg grating sensor body; 20-a polyolefin protective tube; 30-a first refractory layer; 301-a ceramic silica gel composite belt; 302-basalt high temperature resistant wire; 40-stainless steel pipes; 50-a second refractory layer; 60-mesh; 70-aerogel.

Detailed Description

The following describes in detail the examples of the present utility model, which are implemented on the premise of the technical solution of the present utility model, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present utility model is not limited to the following examples.

As shown in fig. 1-2, the fiber bragg grating sensor with the heat insulation function provided by the utility model comprises a fiber bragg grating sensor body (10), wherein a polyolefin protection tube (20) is sleeved on a strand, a first fire-resistant layer (30) is arranged outside the polyolefin protection tube (20), a stainless steel tube (40) is sleeved outside the first fire-resistant layer (30), a second fire-resistant layer (50) is wound outside the stainless steel tube (40), and a fine wire mesh (60) is coated outside the second fire-resistant layer (50).

As shown in fig. 1-2, the first refractory layer (30) of the fiber grating sensor with the heat insulation function provided by the utility model comprises a ceramic silica gel composite belt (301) and basalt high temperature resistant wires (302), wherein the ceramic silica gel composite belt (301) is wound around the polyolefin protective tube (20), and the basalt high temperature resistant wires (302) stitch gaps between the ceramic silica gel composite belt (301). Preferably, the ceramic silica gel composite tape 301 is wound twice, and is wound in clockwise and counterclockwise directions respectively; the second refractory layer 50 is further wrapped with a PET high temperature resistant tape to achieve further fixation.

As shown in fig. 1-2, in the fiber bragg grating sensor with the heat insulation function provided by the utility model, aerogel (70) is filled in the stainless steel tube (40). Wherein, the liquid crystal display device comprises a liquid crystal display device,

as shown in fig. 1-2, the structure of the second refractory layer (50) is identical to that of the first refractory layer (30) in the fiber grating sensor with heat insulation function. Preferably, the second refractory layer 50 may also be coated with a rear basalt high temperature resistant cloth.

The technical scheme is as follows:

a) When casting a mold in hot mode;

b) The first refractory layer and the second refractory layer are used for providing heat insulation and fireproof effects;

c) The aerogel is used for further improving the fireproof effect;

d) The stainless steel pipe and the polyolefin protective pipe are used for limiting various materials from moving, and have a protective effect.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The utility model provides a fiber bragg grating sensor with thermal-insulated function, includes fiber bragg grating sensor body (10), its characterized in that: the cable strand is sleeved with a polyolefin protection pipe (20), a first fire-resistant layer (30) is arranged outside the polyolefin protection pipe (20), a stainless steel pipe (40) is sleeved outside the first fire-resistant layer (30), a second fire-resistant layer (50) is wound outside the stainless steel pipe (40), and a fine wire mesh (60) is coated outside the second fire-resistant layer (50).

2. The fiber bragg grating sensor with the heat insulation function according to claim 1, wherein: the first refractory layer (30) comprises a ceramic silica gel composite belt (301) and basalt high-temperature-resistant wires (302), the ceramic silica gel composite belt (301) is wound around the polyolefin protection tube (20), and gaps between the ceramic silica gel composite belt (301) are stitched by the basalt high-temperature-resistant wires (302).

3. The fiber bragg grating sensor with the heat insulation function according to claim 2, wherein: the stainless steel tube (40) is filled with aerogel (70).

4. A fiber bragg grating sensor with a heat insulation function according to claim 3, wherein: the second refractory layer (50) has a structure that is identical to the structure of the first refractory layer (30).