CN212567503U - Tank monitoring device and monitoring system - Google Patents

Tank monitoring device and monitoring system Download PDF

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Publication number
CN212567503U
CN212567503U CN202021403492.6U CN202021403492U CN212567503U CN 212567503 U CN212567503 U CN 212567503U CN 202021403492 U CN202021403492 U CN 202021403492U CN 212567503 U CN212567503 U CN 212567503U
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China
Prior art keywords
tank
optical fiber
monitoring
temperature measuring
strain sensor
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CN202021403492.6U
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Chinese (zh)
Inventor
丁志国
高峰
董绍华
武钢
王有力
刘大智
杨峥
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Tangshan Zhiming Electronic Technology Co ltd
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Tangshan Zhiming Electronic Technology Co ltd
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Abstract

The utility model discloses a jar body monitoring devices and monitoring system, the device includes: the transverse optical fiber strain sensors are transversely distributed on the side wall of the tank body; the longitudinal optical fiber strain sensors are longitudinally distributed on the side wall of the tank body; the bottom optical fiber strain sensor is arranged at the bottom of the tank body; the fiber grating demodulation device can receive optical signals transmitted by the transverse fiber strain sensor, the longitudinal fiber strain sensor and the bottom fiber strain sensor and demodulate and obtain strain information generated by the deformation of the side wall of the tank body and the bottom of the tank body and vibration information of the side wall of the tank body and the bottom of the tank body; the method can solve the problems of inaccurate measurement and low practicability of the conventional tank body inclination measurement method.

Description

Tank monitoring device and monitoring system
Technical Field
The utility model relates to an oil storage facilities field, more specifically relates to a jar body monitoring devices and monitoring system.
Background
Storage tanks are a common method used in petroleum processing and transportation in chemical industry. Because the storage tank is bulky, tiny settlement and deformation are difficult to observe by naked eyes in daily routing inspection and maintenance, and can be discovered only when the instability deformation is accumulated to a certain degree. Therefore, the problem of uneven settlement of the storage tank is receiving more and more attention from the oil and gas storage and transportation industry. In 1974, 12 and 8 days, a 5-million oil tank in a water island oil refinery of Mitsubishi corporation of Japan has a damage accident, the leakage amount of crude oil exceeds 4-million cubic meters, the ground is polluted by nearly 15-million square meters, and the economic loss of more than 1.5 hundred million dollars is caused. Based on the reasons, the on-line monitoring technology for the uneven foundation settlement of the storage tank is researched and developed, and the safe and reliable operation of the storage tank is ensured.
At present, a static leveling system is generally used for monitoring the uneven foundation settlement of a storage tank in engineering application, and actually, the liquid level is monitored through a communicating vessel. However, such methods require a fixed base point, and it is difficult to provide a fixed base point near the tank in an actual tank due to local conditions, thereby reducing static leveling stability and operability. And a static level monitoring scheme combining a communicating pipe with multipoint distribution and an optical fiber sensor is also utilized to achieve the purpose of multipoint settlement monitoring. At the initial implementation stage of the monitoring scheme, the scheme is matched with other settlement monitoring schemes, and the purpose of monitoring the settlement distribution at multiple points can be achieved. However, in the continuous monitoring for years, due to the condensation and expansion of the liquid in the pipeline, the instability of the monitoring device and the influence of the external temperature, the scheme is difficult to ensure the long-term stable monitoring result. In addition, non-contact sensing technologies such as GPS, laser, and radar are also beginning to be applied in engineering. The GPS has an advantage of convenient application, but its millimeter-level measurement accuracy still needs to be further improved. Non-contact measuring equipment such as laser and radar precision is high and convenient to use, but receives environmental factor's such as weather influence easily. In addition, among methods for indirectly calculating settlement such as an accelerometer and an inclinometer, a method for obtaining displacement through acceleration measurement and then twice integral calculation is theoretically possible, but the obtained settlement monitoring accuracy is not high due to accumulation of errors in the integration process.
The information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a jar body monitoring devices and monitoring system to it is not accurate enough to solve current jar body slope measurement method measurement, problem that the practicality is not strong.
In order to achieve the above object, the utility model provides a jar body monitoring device on the one hand, include:
the transverse optical fiber strain sensors are transversely distributed on the side wall of the tank body;
the longitudinal optical fiber strain sensors are longitudinally distributed on the side wall of the tank body;
the bottom optical fiber strain sensor is arranged at the bottom of the tank body;
the fiber grating demodulating device can receive optical signals transmitted by the transverse fiber strain sensor, the longitudinal fiber strain sensor and the bottom fiber strain sensor and demodulate and obtain strain information generated by deformation of the side wall of the tank body and the bottom of the tank body and vibration information of the side wall of the tank body and the bottom of the tank body.
Optionally, the bottom of the tank body is provided with an asphalt waterproof layer, and the bottom optical fiber strain sensor is arranged in the asphalt waterproof layer.
Optionally, still include the ground, the ground is used for bearing the jar body, be provided with the crossbeam structure in the ground, the crossbeam structure includes the reinforcing bar, bottom optic fibre strain sensor locates on the reinforcing bar.
Optionally, the optical fiber temperature measuring device further comprises a distributed optical fiber temperature measuring device and an S-shaped temperature measuring optical fiber arranged at the bottom of the tank body, the S-shaped temperature measuring optical fiber is connected with the distributed optical fiber temperature measuring device, and the distributed optical fiber temperature measuring device can receive optical signals transmitted by the S-shaped temperature measuring optical fiber and demodulate the optical signals to obtain temperature information of the bottom of the tank body.
Optionally, a protection column is arranged at the bottom of the tank body and corresponds to the bent part of the S-shaped temperature measuring optical fiber, and the bent part of the S-shaped temperature measuring optical fiber is attached to the protection column.
Optionally, the S-shaped temperature measuring optical fiber is sleeved with a protection tube.
Optionally, the pitch of the transverse optical fiber strain sensors is 1.0m-2.0 m.
Optionally, the pitch of the longitudinal optical fiber strain sensors is 0.5m-1.0 m.
The utility model also provides a jar body monitoring system, including foretell jar body monitoring devices.
Optionally, the tank monitoring device transmits the strain information, the vibration information and the temperature information to the controller through the fiber grating demodulation device, and the controller is connected with the communication early warning device.
The utility model has the advantages of: strain information and vibration information of the whole tank body can be detected through the transverse optical fiber strain sensor, the longitudinal optical fiber strain sensor and the bottom optical fiber strain sensor which are arranged at different positions in the vertical direction; the temperature information of the bottom of the tank body can be detected through the S-shaped temperature measuring optical fiber; evaluating the deformation condition of the tank body by analyzing the deformation information through the controller; the vibration information is analyzed through the controller, the liquid level height in the tank is evaluated, and the liquid level height is fed back to be the inclination condition of the tank body; the leakage condition of the bottom of the tank body is evaluated by analyzing the temperature information through the controller; the effect of monitoring the inclination and settlement of the tank body is realized by analyzing the deformation of the tank body and the vibration condition of the tank body.
The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a schematic view of a mounting structure of a transverse optical fiber strain sensor, a longitudinal optical fiber strain sensor and a bottom optical fiber strain sensor of a tank body monitoring device according to an embodiment of the present invention.
Fig. 2 shows a schematic view of an installation structure of an S-shaped temperature measuring optical fiber of a tank monitoring device at the bottom of a tank according to an embodiment of the present invention.
Fig. 3 shows a schematic structural diagram of an S-shaped temperature measuring optical fiber and a protection pillar of a tank monitoring device according to an embodiment of the present invention.
Fig. 4 shows a schematic structural diagram of the connection between the bottom optical fiber strain sensor of the tank monitoring device and the steel bar according to an embodiment of the present invention.
Description of reference numerals:
1-tank body, 2-transverse optical fiber strain sensor, 3-longitudinal optical fiber strain sensor, 4-bottom optical fiber sensor, 5-S-shaped temperature measuring optical fiber, 6-protective column and 7-reinforcing steel bar.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
According to the utility model discloses a jar body monitoring devices, a serial communication port, include:
the transverse optical fiber strain sensors are transversely distributed on the side wall of the tank body;
the longitudinal optical fiber strain sensors are longitudinally distributed on the side wall of the tank body;
the bottom optical fiber strain sensor is arranged at the bottom of the tank body;
the fiber grating demodulating device can receive optical signals transmitted by the transverse fiber strain sensor, the longitudinal fiber strain sensor and the bottom fiber strain sensor and demodulate and obtain strain information generated by deformation of the side wall of the tank body and the bottom of the tank body and vibration information of the side wall of the tank body and the bottom of the tank body.
Specifically, the transverse optical fiber strain sensor and the longitudinal optical fiber strain sensor are arranged on the outer wall of the tank body in a grid shape, the bottom optical fiber strain sensor is arranged at the bottom of the tank body, the deformation of the tank body is effectively monitored by the transverse optical fiber strain sensor, the bottom optical fiber strain sensor and the longitudinal optical fiber strain sensor, and the damage condition of the tank body can be estimated timely through the deformation of the tank body; the transverse optical fiber strain sensors and the longitudinal optical fiber strain sensors at different positions in the vertical direction can also detect the vibration information of the tank body, so that the liquid level height in the tank is evaluated and fed back to the inclination condition of the tank body; strain information of different positions of the tank body measured by the transverse optical fiber strain sensor, the longitudinal optical fiber strain sensor and the bottom optical fiber strain sensor can obtain the deformation condition of the whole tank body, and the inclination condition of the tank body can be evaluated according to the deformation condition; meanwhile, the vibration information of the tank body is acquired through monitoring, the liquid level height in the tank body can be evaluated according to the vibration information, if the tank body is inclined, the liquid level heights of different positions in the tank body are different, and the vibration information measured at different positions is different, so that the inclination condition of the tank body can be fed back.
Fig. 1 shows according to the utility model discloses a jar body monitoring devices 'S horizontal optic fibre strain transducer, vertical optic fibre strain transducer and the mounting structure sketch of bottom optic fibre strain transducer on the jar body of an embodiment, fig. 2 shows according to the utility model discloses an embodiment' S a jar body monitoring devices 'S S-shaped temperature measurement optic fibre is at the mounting structure sketch of the bottom of the jar body, fig. 3 shows according to the utility model discloses a jar body monitoring devices' S S-shaped temperature measurement optic fibre and the structure sketch of guard post of an embodiment, fig. 4 shows according to the utility model discloses an embodiment 'S a jar body monitoring devices' S bottom optic fibre strain transducer and the structure sketch of being connected of reinforcing bar are the utility model discloses a structure sketch map of an embodiment.
Examples
As shown in fig. 1 to 4, the utility model provides a tank body monitoring device, include:
the transverse optical fiber strain sensors 2 are transversely distributed on the side wall of the tank body 1;
the longitudinal optical fiber strain sensors 3 are longitudinally distributed on the side wall of the tank body 1;
the bottom optical fiber strain sensor 4 is arranged at the bottom of the tank body 1;
the fiber grating demodulating device can receive optical signals transmitted by the transverse fiber strain sensor 2, the longitudinal fiber strain sensor 3 and the bottom fiber strain sensor 4 and demodulate and obtain strain information generated by deformation of the side wall of the tank body 1 and the bottom of the tank body 1 and vibration information of the side wall of the tank body 1 and the bottom of the tank body 1.
Specifically, horizontal optical fiber strain sensor 2, vertical optical fiber strain sensor 3 and bottom optical fiber strain sensor 4 are long scale distance optical fiber sensors, through satisfying high-accuracy dynamic and static measurement, the range of the dynamic measurement range interval of reinforcing (tens of centimeters to several meters), have the long scale distance sensing unit of the small damage detection coverage ability, to the key region (like girder, post, structure seam) of jar body 1 structure, every interval fixed distance monitors, with jar body 1 stress change coarse gridization.
In this embodiment, the bottom of the tank body 1 is provided with an asphalt waterproof layer, and the bottom optical fiber strain sensor 4 is arranged in the asphalt waterproof layer.
In this embodiment, still include the ground, the ground is used for bearing jar body 1, be provided with the crossbeam structure in the ground, the crossbeam structure includes reinforcing bar 7, bottom optical fiber strain sensor 4 is located on the reinforcing bar 7.
Specifically, the bottom optical fiber strain sensor 4 is a long gauge length optical fiber, the beam structure at the bottom of the tank body 1 and the bottom optical fiber strain sensor 4 are arranged in an asphalt waterproof layer at the bottom of the storage tank 1, and the whole inclination and settlement of the tank body 1 are calibrated through transverse stress change in a mode of combining a long gauge length sensing unit and a rigid beam structure.
In this embodiment, the temperature measuring device further comprises a distributed optical fiber temperature measuring device and an S-shaped temperature measuring optical fiber 5 arranged at the bottom of the tank body, wherein the S-shaped temperature measuring optical fiber 5 is connected with the distributed optical fiber temperature measuring device, and the distributed optical fiber temperature measuring device can receive an optical signal transmitted by the S-shaped temperature measuring optical fiber 5 and demodulate the optical signal to obtain temperature information of the bottom of the tank body 1.
Specifically, the S-shaped temperature measurement optical fiber 5 mainly adopts an optical fiber distributed sensing mode aiming at the blind zone at the bottom of the tank body 1, the optical fiber 5 is distributed at the bottom of the tank body 1 in a net shape in an S shape and is led to the outside of the base of the tank body 1 through a protection pipe, and the temperature distribution at the bottom of the whole tank body 1 is monitored by adopting distributed sensing of temperature measurement (which can be carried out by adopting ROTDR and can also be carried out by adopting other general temperature measurement modes).
In this embodiment, a protection column 6 is disposed at the bottom of the tank 1 and corresponding to the bending portion of the S-shaped temperature measuring fiber 5, and the bending portion of the S-shaped temperature measuring fiber 5 is attached to the protection column 6.
Specifically, in order to ensure that the S-shaped temperature measuring optical fiber 5 does not generate excessive stress at the bent part in the construction process, the optical fiber is attached to the outer side of a flat cylindrical protective body in each bent area.
In this embodiment, the S-shaped temperature measuring optical fiber 5 is sleeved with a protection tube.
Specifically, the protection tube is used for protecting the S-shaped temperature measurement optical fiber 5, and the service life of the S-shaped temperature measurement optical fiber 5 can be prolonged through the protection tube.
In the present embodiment, the pitch of the transverse optical fiber strain sensors 2 is 1.0m-2.0 m.
Specifically, the distance of 1.0m-2.0m can ensure enough precision and measuring range, and when the transverse optical fiber strain sensors 2 are arranged, the transverse optical fiber strain sensors 2 are preferably distributed along the whole tank body 1 in a circumferential direction; under the condition that the number of the transverse optical fiber strain sensors 2 is limited, monitoring of circumferential duct piece splicing seams of the tank body 1 is met; under the condition that the transverse optical fiber strain sensors 2 cannot be distributed along the circumferential direction of the whole tank body 1, the transverse optical fiber strain sensors 2 are distributed in the area with larger deformation of the tank body 1 in calculation; when the bias monitoring section is arranged, the transverse optical fiber strain sensor 2 adopts a region distribution sensor.
In the present embodiment, the pitch of the longitudinal optical fiber strain sensors 3 is 0.5m to 1.0 m.
Specifically, the distance of 0.5m to 1.0m can ensure enough precision and measuring range, when the longitudinal optical fiber strain sensor 3 is arranged, the longitudinal optical fiber strain sensor 3 is preferably distributed along the longitudinal direction, and a sensing circuit is preferably arranged up and down respectively; under the condition that the number of the longitudinal optical fiber strain sensors 3 is limited, monitoring of longitudinal segment splicing seams of the tank body 1 is required to be met; when the seam deformation of the tank body 1 is monitored, the longitudinal optical fiber strain sensor 3 adopts a region distribution sensor.
The utility model also provides a jar body monitoring system, including foretell jar body monitoring devices and controller and communication early warning device, jar body monitoring devices passes through fiber grating demodulating equipment will the information of meeting an emergency vibration information biography with temperature information is defeated extremely in the controller, the controller is connected with communication early warning device.
Specifically, the controller acquires data of an external data center, processes an input stress signal of the fiber grating demodulation device and a received vibration signal, and gives the integral deformation of the tank body 1 through simulation by combining the stress signal with the shape of the tank body 1 and the position of the fiber strain sensor on the tank body 1; on the other hand, the controller evaluates the vibration signal from the fiber grating demodulation device, and gives the evaluation of the liquid level in the tank 1 through the difference of the demodulation background vibration signals; meanwhile, the temperature distribution of the bottom of the tank body 1 is given according to the position of the S-shaped temperature measuring optical fiber 5, the temperature and stress contrast is evaluated according to the whole tank body 1, average data accumulated in the initial stage of the use of the tank body 1 in consideration of the daily temperature, the sunlight direction and the like are used as reference, and the evaluation is carried out by utilizing an external database.
Furthermore, a comparison database is arranged in the controller and used for comparing the acquired data, deformation or temperature change exceeding a threshold value represents that the damage risk of the tank body is increased or the tank body leaks, the controller triggers the communication early warning device to alarm and informs a responsible person, and the responsible person carries out investigation according to the situation and executes a corresponding plan according to the related situation.
The utility model discloses a jar body monitoring devices's concrete realization process does:
longitudinally arranging an optical fiber strain sensor on the side wall of the tank body;
transversely arranging optical fiber strain sensors on the side wall of the tank body, so that the optical fiber strain sensors transversely arranged on the side wall of the tank body and the optical fiber strain sensors longitudinally arranged on the side wall of the tank body form a grid shape;
an optical fiber strain sensor and a temperature measuring optical fiber are distributed at the bottom of the tank body;
arranging reinforcing steel bars in a foundation for bearing the tank body, and attaching the optical fiber strain sensor at the bottom of the tank body to the reinforcing steel bars;
monitoring strain information and vibration information of the tank body through optical fiber strain sensors on the side wall of the tank body and the bottom of the tank body;
monitoring temperature information of the bottom of the tank body through a temperature measuring optical fiber;
and analyzing the strain information, the vibration information and the temperature information to judge the deformation, settlement and inclination conditions of the tank body and whether the tank bottom of the tank body leaks.
Specifically, the optical fiber sensors are externally attached when being arranged, so that the requirements of normal operation and appearance are not influenced. The fiber sensor joint respectively fixes the outer sleeve pipe of butt fusion and wire jumper and wholly fixes the bridge bottom, has played the effect of dampproofing, dustproof, protecting against shock effectively to it provides convenience to maintain for the later stage.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. A tank monitoring device, comprising:
the transverse optical fiber strain sensors are transversely distributed on the side wall of the tank body;
the longitudinal optical fiber strain sensors are longitudinally distributed on the side wall of the tank body;
the bottom optical fiber strain sensor is arranged at the bottom of the tank body;
the fiber grating demodulating device can receive optical signals transmitted by the transverse fiber strain sensor, the longitudinal fiber strain sensor and the bottom fiber strain sensor and demodulate and obtain strain information generated by deformation of the side wall of the tank body and the bottom of the tank body and vibration information of the side wall of the tank body and the bottom of the tank body.
2. The tank monitoring device according to claim 1, wherein the bottom of the tank is provided with an asphalt waterproof layer, and the bottom optical fiber strain sensor is arranged in the asphalt waterproof layer.
3. The tank monitoring device of claim 1, further comprising a foundation for carrying the tank, wherein a beam structure is provided in the foundation, the beam structure comprising steel bars, and the bottom optical fiber strain sensor is provided on the steel bars.
4. The tank monitoring device according to claim 1, further comprising a distributed optical fiber temperature measuring device and an S-shaped temperature measuring optical fiber arranged at the bottom of the tank, wherein the S-shaped temperature measuring optical fiber is connected with the distributed optical fiber temperature measuring device, and the distributed optical fiber temperature measuring device can receive an optical signal transmitted by the S-shaped temperature measuring optical fiber and demodulate the optical signal to obtain temperature information of the bottom of the tank.
5. The tank body monitoring device according to claim 4, wherein a protection column is arranged at the bottom of the tank body and corresponding to the bending part of the S-shaped temperature measuring optical fiber, and the bending part of the S-shaped temperature measuring optical fiber is attached to the protection column.
6. The tank monitoring device according to claim 5, wherein the S-shaped temperature measuring optical fiber is sleeved with a protective tube.
7. The tank monitoring device of claim 1, wherein the transverse fiber strain sensors are spaced 1.0m to 2.0m apart.
8. A tank monitoring device as claimed in claim 1, wherein the longitudinal fibre strain sensors are spaced apart by 0.5m to 1.0 m.
9. A tank monitoring system comprising a tank monitoring device according to any one of claims 1 to 8.
10. The canister monitoring system of claim 9, further comprising: the tank monitoring device transmits the strain information and the vibration information to the controller through the fiber grating demodulation device, and the controller is connected with the communication early warning device.
CN202021403492.6U 2020-07-16 2020-07-16 Tank monitoring device and monitoring system Active CN212567503U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021403492.6U CN212567503U (en) 2020-07-16 2020-07-16 Tank monitoring device and monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021403492.6U CN212567503U (en) 2020-07-16 2020-07-16 Tank monitoring device and monitoring system

Publications (1)

Publication Number Publication Date
CN212567503U true CN212567503U (en) 2021-02-19

Family

ID=74621721

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021403492.6U Active CN212567503U (en) 2020-07-16 2020-07-16 Tank monitoring device and monitoring system

Country Status (1)

Country Link
CN (1) CN212567503U (en)

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