Petroleum pipeline safety monitoring device

Abstract

The utility model provides a petroleum pipeline safety monitoring device which comprises an optical fiber sensing cable wound in a double-helix mode, the optical fiber sensing cable comprises a left-handed helix and a right-handed helix, and the left-handed helix and the right-handed helix are alternately wound on the outer wall of a pipeline with the same screw pitch and opposite rotation directions; the flexible fixing device is used for fixing the optical fiber sensing cable on the outer wall of a pipeline; and the segmented protective sleeve is arranged on the outer layer of the optical fiber sensing cable. According to the utility model, the optical fiber sensing cable is arranged on the outer wall of the pipeline in a double-helix winding manner, and the left-handed helix and the right-handed helix of the optical fiber sensing cable are arranged in a crossed manner, so that mutual compensation and verification can be realized, and the accuracy of monitoring data is improved; the flexible fixing device and the sectional protective sleeve ensure the safe and stable operation of the cable to the maximum extent from the two aspects of machinery and environment. The optical fiber sensing cable can adapt to thermal expansion and cold contraction and bending deformation of a pipeline, and the risk of cable damage is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline monitoring, in particular to a safety monitoring device for a petroleum pipeline. Background Art

[0002] The field of oil pipeline monitoring has long faced major challenges, especially the limitations of traditional fiber optic sensor cables in applications. In the traditional single winding mode, the coverage rate of the fiber optic sensor cable on the pipeline wall is low, which directly leads to monitoring accuracy problems, making it difficult to detect small deformations or potential safety hazards of the oil pipeline in a timely manner. In addition, the traditional fixing method, that is, using a rigid fixing method to fix the fiber optic sensor cable on the pipeline, is not only susceptible to the thermal expansion and contraction of the pipeline, but also the cable is easily damaged when the pipeline is bent and deformed. The shortcomings of this fixing method further aggravate the decline in monitoring accuracy and may even cause the failure of the entire monitoring system.

[0003] Therefore, it is necessary to design a detection device that can improve monitoring accuracy and offset the effects of thermal expansion and contraction and bending deformation of the pipeline. Utility Model Content

[0004] In order to overcome the defects mentioned in the above background technology, the utility model provides a petroleum pipeline safety monitoring device, which improves the monitoring accuracy and also has the function of offsetting the influence of thermal expansion and contraction and bending deformation of the pipeline.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A petroleum pipeline safety monitoring device comprises a double-helix wound optical fiber sensing cable, the optical fiber sensing cable comprises a left-handed helix and a right-handed helix, the left-handed helix and the right-handed helix are alternately wound on the outer wall of the pipeline with the same pitch and opposite rotation directions; a flexible fixing device for fixing the optical fiber sensing cable on the outer wall of the pipeline; and a segmented protective cover arranged on the outer layer of the optical fiber sensing cable.

[0007] Furthermore, the flexible fixing device comprises a flexible fixing clamp, which is made of a flexible material and has an arc groove adapted to the outer diameter of the pipeline, for accommodating and fixing the optical fiber sensor cable.

[0008] Furthermore, a tightening belt is surrounded on the outer periphery of the flexible fixing clamp, and the optical fiber sensor cable can be pressed and held flexibly by adjusting the tightness of the tightening belt.

[0009] Furthermore, the segmented protective sleeve is formed by splicing a plurality of protective covers, and adjacent protective covers are connected by flexible connectors.

[0010] Furthermore, the shield is a semicircular hard shield, and the interior of the hard shield is filled with flexible buffer material.

[0011] Furthermore, the hard shield is made of metal or engineering plastic.

[0012] Furthermore, the flexible buffer material is used for shock absorption and heat insulation.

[0013] Furthermore, the flexible connection member is a flexible hinge.

[0014] The utility model has the following advantages:

[0015] 1. The utility model arranges the optical fiber sensor cable on the outer wall of the pipeline in a double-helix winding manner. The cross arrangement of the left-handed and right-handed spirals can compensate and verify each other, thereby improving the accuracy of the monitoring data; the flexible fixing device and the segmented protective cover maximize the safety and stable operation of the cable from both mechanical and environmental aspects. The optical fiber sensor cable can adapt to the thermal expansion and contraction and bending deformation of the pipeline, greatly reducing the risk of cable damage.

[0016] 2. The flexible fixing device of the utility model adopts a flexible fixing clamp structure, and a tightening belt is surrounded by the outer circumference of the clamp. By adjusting the tightness of the tightening belt, the cable can be flexibly pressed. This fixing method is not only easy to install, but also can adapt to the thermal expansion and contraction of the pipeline, reduce the stress concentration of the cable, and improve long-term reliability.

[0017] 3. The segmented protective cover can effectively prevent external damage and environmental corrosion, and will not affect the sensitivity of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the hard shield, flexible hinge and flexible buffer material of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the utility model from another perspective.

[0021] Figure 4 It is a partial schematic diagram of the optical fiber sensing cable of the utility model being wound on a pipeline.

[0022] Figure 5 It is a schematic diagram of the structure of the flexible fixing clamp and the tightening belt of the utility model.

[0023] In the above figures: 1: optical fiber sensing cable, 2-flexible fixing clamp, 3-fastening belt, 4-segmented protective cover, 41-hard protective cover, 42-flexible hinge, 5-flexible buffer material. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-5 As shown, the oil pipeline safety monitoring device of this embodiment mainly includes a double-helix-wound optical fiber sensor cable 1, a flexible fixing device and a segmented protective cover 4. The left-handed spiral and right-handed spiral parts of the optical fiber sensor cable 1 are alternately wound on the outer wall of the pipeline with the same pitch and opposite rotation direction, forming a cross structure similar to an "X" shape. This layout can further improve the sensitivity and spatial resolution of monitoring, while also enhancing the mechanical strength and anti-interference ability of the cable. The flexible fixing device adopts a flexible fixing clamp 2, which is made of a flexible material (such as engineering plastics or elastomers) and is provided with an arc groove adapted to the outer diameter of the pipeline for accommodating and fixing the optical fiber sensor cable 1. This design enables the device to fit closely to the outer wall of the pipeline while maintaining a certain flexibility to adapt to slight deformations of the pipeline.

[0026] Through optimized design, the device can achieve 360° all-round, high-sensitivity, and high-resolution monitoring of pipelines, while having better mechanical strength, environmental adaptability, and long-term reliability.

[0027] In addition, a tightening band 3 is wrapped around the outer circumference of the flexible fixing clamp 2, and by adjusting the tightness of the tightening band 3, the optical fiber sensor cable 1 can be flexibly pressed. This design enables the flexible fixing device to adapt to pipelines of different diameters, to adapt to thermal expansion and contraction of pipelines, and to adjust the fixing force according to actual needs to ensure the stability and reliability of the optical fiber sensor cable 1.

[0028] Among them, the segmented protective cover 4 is composed of a plurality of semicircular hard shields 41 (such as metal or engineering plastics) spliced ​​together, and has good strength and corrosion resistance, and can protect the optical fiber sensor cable 1 under harsh environmental conditions. At the same time, the hard shield 41 of metal or engineering plastic also has good wear resistance, which can effectively extend the service life of the oil pipeline safety monitoring device. Adjacent shields are connected by flexible connectors (such as flexible hinges 42). This design allows the protective cover to have a certain degree of flexibility while maintaining the overall structure, and can adapt to the bending and vibration of the pipeline. In addition, the interior of the hard shield 41 is filled with flexible buffer material 5 for shock absorption and heat insulation, further protecting the optical fiber sensor cable 1 from damage by the external environment.

[0029] The oil pipeline safety monitoring device described in the utility model includes a double-helix-wound optical fiber cable, a flexible fixing device and a segmented protective cover 4. It has a simple structure and is easy to install. It can significantly improve the performance and reliability of the oil pipeline safety monitoring device and has broad application prospects.

[0030] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several modifications, improvements and substitutions can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A petroleum pipeline safety monitoring device, characterized in that: include: A double-helix-wound optical fiber sensing cable (1), the optical fiber sensing cable (1) comprising a left-handed helix and a right-handed helix, the left-handed helix and the right-handed helix being alternately wound on the outer wall of a pipe with the same pitch and opposite directions of rotation; A flexible fixing device for fixing the optical fiber sensor cable (1) on the outer wall of a pipeline; as well as A segmented protective cover is arranged on the outer layer of the optical fiber sensor cable (1).

2. The oil pipeline safety monitoring device according to claim 1, characterized in that: The flexible fixing device comprises a flexible fixing clamp (2), which is made of a flexible material and has an arc-shaped groove adapted to the outer diameter of the pipeline inside, and is used to accommodate and fix the optical fiber sensor cable (1).

3. The oil pipeline safety monitoring device according to claim 2 is characterized in that: A tightening belt (3) is wrapped around the outer periphery of the flexible fixing clamp (2), and by adjusting the tightness of the tightening belt (3), flexible pressing and holding of the optical fiber sensor cable (1) is achieved.

4. The oil pipeline safety monitoring device according to claim 1, characterized in that: The segmented protective sleeve is formed by splicing a plurality of protective covers, and adjacent protective covers are connected via flexible connectors.

5. The oil pipeline safety monitoring device according to claim 4 is characterized in that: The shield is a semicircular hard shield (41), and the interior of the hard shield (41) is filled with a flexible buffer material (5).

6. The oil pipeline safety monitoring device according to claim 5, characterized in that: The hard shield (41) is made of metal or engineering plastics.

7. The oil pipeline safety monitoring device according to claim 5, characterized in that: The flexible buffer material (5) is used for shock absorption and heat insulation.

8. The oil pipeline safety monitoring device according to claim 4, characterized in that: The flexible connection member is a flexible hinge (42).

Images