Method for installing an optical fiber safety prewarning sensor

An installation method and safety early warning technology, which is applied in the pipeline system, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problem of no effective method for safety protection, the installation method of optical fiber safety early warning sensors, and the reduced effectiveness of protection, etc. question

Active Publication Date: 2013-02-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the existing installation method of laying optical cables in the same trench for pipelines will greatly reduce the effectiveness of protection for larger diameter pipelines and the other side of pipelines without optical fibers. It can be seen that this method uses optical cables to protect The pipeline has many flaws and deficiencies
[0010] However, there is no effective way to protect the safety of other important facilities and areas such as underground structures or communication cables, transportation facilities, cultural relics protection areas, armories, key institutions and important industrial factories.
If an effective system such as the optical fiber safety early warning system is used, there is also a problem with the installation method of the optical fiber safety early warning sensor

Method used

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  • Method for installing an optical fiber safety prewarning sensor
  • Method for installing an optical fiber safety prewarning sensor
  • Method for installing an optical fiber safety prewarning sensor

Examples

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Effect test

Embodiment 1

[0033] Embodiment 1. Use this example to illustrate the specific implementation of the present invention and further illustrate the present invention. This example is an optical fiber sensor installation method for installing an optical fiber safety early warning system on a Φ1500mm pipeline, where the pipeline radius is r=750mm, the sensitivity R of the sensing optical cable 2 is 1500mm, and the distance between the optical cable and the pipeline is D=300mm, according to the conditions of the installation method R>2r +D Judgment, the condition is not satisfied, it is necessary to install a sensing optical cable, the number of optical cables must be >|π(2r+D) / 2R| to be 2, and its composition is as follows figure 2 shown. Install two sensing optical cables 2 along the pipe trench of the pipeline, and the laying position is: install the two sensing optical cables 2 on both sides of the pipeline 1 obliquely above the position close to the same horizontal plane, and the vertical ...

Embodiment 2

[0034] Embodiment 2. This example is to install the optical fiber sensor of the optical fiber safety early warning system to four 100,000 cubic crude oil storage tanks arranged in a square. Since the oil tank area covers an area of ​​400×400m, a set of optical fiber safety early warning system is adopted, and a sensing optical cable 2 is laid three times around the oil tank area in a square spiral shape and buried at a depth of 1 meter underground with a pitch of 6 meters. The sensing optical cable 2 installed by this method is used by the optical fiber safety early warning system, which can warn an 18-meter-wide square ring around the oil tank area, and the signal sensitivity is high, effective, reliable, and very ideal.

[0035] It can be seen that the optical fiber sensor installed by this method has high signal sensitivity, is effective and reliable, and provides an ideal optical fiber sensor installation method for the optical fiber safety early warning system.

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Abstract

The invention relates to a method for installing an optical fiber safety prewarning sensor which is used for protecting and prewarning the safety of buried structure or ground structure and facilities. The method comprises that a sensing optical cable (2) is arranged around the buried structure or the ground structure and the facilities (3) by underground laying, and is characterized in that one or a plurality of loops of sensing optical cable(s) (2) is / are buried underground around the protected structures and the facilities (3) in a shape similar to plane projection of the protected structures and the facilities (3); furthermore, the loop spacing is less than or equal to two times of monitoring sensitivity radius of the sensing optical cable (2), and the burying depth of the sensing optical cable (2) is less than the monitoring sensitivity radius of the sensing optical cable (2). The optical fiber sensor installed by the method has high, effective and reliable signal sensitivity.

Description

[0001] The present invention is a divisional application filed on June 30, 2006, with the application number 200610090595X, and the title of the invention is "Installation method for optical fiber safety early warning sensor". technical field [0002] The invention relates to an installation method of an optical fiber safety early warning sensor for safety protection and early warning of buried pipelines, structures or ground structures and facilities. It involves the measurement of mechanical vibration, the measurement of impact and the technical field of piping system. Background technique [0003] For substances such as oil, natural gas, refined oil, coal slurry and water, pipeline transportation is a safe, economical and efficient transportation method, and it is playing an increasingly important role in the global transportation industry, especially in petroleum, finished products Oil and natural gas play an extremely important role in the transportation of flammable an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/00
Inventor 张金权王小军焦书浩王飞方德学霍峰王赢
Owner BC P INC CHINA NAT PETROLEUM CORP
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