A method and device for early warning monitoring of underwater oil and gas pipeline disasters in a river

Abstract

The present invention discloses a method and device for early warning monitoring of underwater oil and gas pipeline disasters in a river. The method of the present invention adopts a method of setting a pressure-bearing spring at the bottom of the pipeline according to the parameters such as the diameter, deadweight, length, buried soil thickness, soil density, etc. of the underwater oil and gas pipeline in the river; a pre-pressure for upward lifting of the pipeline is generated, and an early warning model for the risk of pipeline floating is established. A safety threshold F is set according to the monitoring and early warning method. a The invention provides early warning for the risk of pipeline floating, comprehensively considers various factors of pipeline operation, and has high monitoring and early warning accuracy, sensitivity and strong practicability, which greatly improves the safety and reliability of the operation of underwater oil and gas pipelines in rivers. The invention realizes early warning so that relevant personnel can have enough time to take emergency measures before the pipeline floats, thereby avoiding the occurrence of disasters, thereby avoiding serious oil and gas leakage safety accidents and major economic losses.

Description

Technical Field

[0001] The present invention relates to the technical field of geological disaster monitoring, and in particular to a method and a device for early warning monitoring of underwater oil and gas pipeline disasters in a river. Background Art

[0002] Oil and gas resources mainly refer to oil and natural gas stored in the earth's crust. Russia is the country with the highest oil content in the world. According to relevant statistics, my country's current oil resources are about 107.27 billion tons, of which about 71.61% are distributed on land and about 22.93% are distributed in the ocean. China's oil and gas resources are unevenly distributed. The Tarim, Qaidam, Shaanxi-Gansu-Ningxia and Sichuan basins in the western region contain 26,000 cubic kilometers of natural gas resources, accounting for about 87% of the country's onshore natural gas resources. In particular, the Tarim Basin in Xinjiang has more than 8,000 cubic kilometers of natural gas resources, accounting for 22% of the country's total natural gas resources. China's energy industry is developing rapidly, and the large-scale burning of coal has caused the atmospheric environment to deteriorate. It is urgent to develop clean energy and adjust the energy structure.

[0003] At present, long-distance pipeline transportation is inevitably affected by the topographic and geological environment, especially during the rainy season. The original rock and soil will be disturbed and become loose due to pipeline excavation. The weak points of the pipeline's geological conditions will be eroded and eroded by water flow, causing the loss of buried soil on the upper part of the pipeline. Different forms of water damage disasters will occur, especially the risk of underwater oil and gas pipelines floating due to the buoyancy of water, which seriously threatens the safety of oil and gas pipeline transportation, and may further cause serious oil and gas leakage safety accidents and major economic losses, affecting the transportation of oil and gas resources and social development. It is particularly important to realize reliable real-time monitoring of underwater pipeline water damage. Summary of the invention

[0004] In order to overcome the technical problems in the background technology, the present invention provides a method and device for early warning monitoring of underwater oil and gas pipeline disasters in a river.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a method for early warning and monitoring of underwater oil and gas pipeline disasters in a river, comprising the following steps:

[0006] Step A. A pressure spring is arranged at the bottom of a pipeline for transporting oil and gas underwater in a river; the pressure spring generates a pre-pressure to lift the pipeline upward, the pressure spring is connected to a sliding resistor, and the sliding resistor converts the pre-pressure value into an electrical signal by connecting to a voltage-stabilizing power supply;

[0007] Step B. Establish a pipeline critical pressure warning model, collect data parameters of the river and pipeline, and define the downward force of the pipeline as F n : F n =G1+G2

[0008] G2=ρ sV s g

[0009] V s =l s b s h s

[0010] Where, F n is the vertical downward force on the pipeline, in N; G1 is the deadweight pressure of the pipeline, which includes the sum of the deadweight of the pipeline and the gravity of the oil and gas in the pipeline, measured by the actual length of the pipeline crossing the river, in N; G2 is the soil pressure on the top of the pipeline, in N; ρ s V is the soil density above the pipeline; s The volume of soil buried above the pipeline, in m 3 ; l s The buried length of the upper part of the pipeline is measured by the actual length of the underwater pipeline crossing the river, in meters; b s h is the buried width of the upper part of the pipeline, that is, the diameter of the pipeline, in meters; s is the soil thickness of the upper part of the pipeline, in m;

[0011] Define the upward force on the pipe as F z : F z =F t +F f

[0012] F f =ρ w V 排

[0013] V 排 =l w S w

[0014] F t =k∆x

[0015] Where, F z is the vertical upward force on the pipeline, unit is N; F f is the buoyancy of the pipe in water, in N; ρ w is the density of water, in kg / m 3 ; g is the acceleration due to gravity, unit is m / s 2 ; V 排 is the volume of water discharged by the pipe, in m 3 ; l w is the pipeline length, measured by the actual length of the underwater pipeline crossing the river, in meters; S w is the cross-sectional area of ​​the pipe, in m 2 ; F tis the preload of the pressure spring on the pipeline, in N; k is the elastic coefficient; ∆x is the deformation of the pressure spring, in m;

[0016] Step C. Set the safety threshold F of the preload of the pressure spring a : F a =λF n

[0017] F 合 =F n -F z ;

[0018] In the formula, F a is the safety threshold of pre-pressure, in N; λ is the safety factor, ranging from 0.2 to 0.3; F n is the vertical downward force, unit is N; F 合 is the resultant force in the vertical direction, in N; F z is the vertical upward force on the pipeline, unit is N;

[0019] F a and F 合 For comparison, F 合 >F a When F 合 ≤F a When the critical state is reached, the pipeline may float up;

[0020] Step D: Real-time detection of the preload value F of the pressure-bearing spring connected to the sliding resistor, which is converted into an electrical signal t When the preload value F t Greater than the safety threshold F a When the pre-pressure value F t Less than or equal to the safety threshold F a When the pipeline enters a floating risk state, a disaster warning is issued.

[0021] Furthermore, the pressure-bearing springs are arranged in three equal distances, so as to realize reliable monitoring of the overall state of the pipeline for underwater oil and gas transportation across the river, avoid the deviation of the detection data caused by the accidental difference of a single pressure-bearing spring, and multiple pressure-bearing springs also realize mutual backup, so as to ensure the accuracy of the detection data and the reliability of the early warning.

[0022] Furthermore, each independent pipeline crossing the river channel underwater is provided with at least three pressure-bearing springs which are arranged equidistantly, so that the unbalanced floating risk state of each independent pipeline can be monitored and warned.

[0023] Furthermore, in step A, the method of converting the preload of the pressure-bearing spring into an electrical signal is as follows:

[0024] The preload value F of the pressure spring t According to Hooke's law F t =k∆x to get the pressure spring deformation ∆x, where k is the elastic coefficient and ∆x is the pressure spring deformation, in units of m;

[0025] Preload value F t Equal to the safety threshold F a When ∆x=L, ∆x is the critical deformation of the pressure spring, and the corresponding critical resistance value of sliding resistance R´ is: R´=ρL / S;

[0026] In the formula, R' is the critical resistance, unit Ω; ρ is the resistivity, which is determined by its own properties, unit N; L is the length of the sliding resistor connected to the voltage-stabilized power supply circuit, unit m; S is the cross-sectional area of ​​the sliding resistor, unit m 2 ;

[0027] The corresponding critical current value I´ is calculated by Ohm’s law R´=U / I´.

[0028] In the formula, R' is the critical resistance, unit Ω; U is the voltage of the regulated power supply, unit V; I' is the critical current, that is, the current threshold, unit A.

[0029] Furthermore, the present invention also discloses a river underwater oil and gas pipeline disaster early warning monitoring device, comprising a pressure plate arranged at the bottom of a pipeline for transporting oil and gas underwater in a river, and also comprising a monitoring box, a pressure spring, a force transmission rod, and a sliding resistor, wherein the pressure spring and the sliding resistor are arranged in a watertight monitoring box, and the pressure plate is connected to the pressure spring and the sliding resistor via the force transmission rod;

[0030] The sliding resistor is connected to a voltage-stabilizing power supply and a monitoring processor which are arranged on the river bank.

[0031] Furthermore, the voltage-stabilized power supply is connected to a battery, the battery is connected to a solar photovoltaic panel, and the monitoring processor is also connected to a wireless transmission device. The real-time data of the pre-pressure of the pressure-bearing spring of the pipeline is sent to a remote monitoring center through the wireless transmission device, thereby realizing unattended automatic monitoring on site.

[0032] Furthermore, the monitoring processor includes a single-chip microcomputer and an analog-to-digital conversion module, which can convert and calculate the monitoring data of the pressure plate.

[0033] Furthermore, the voltage-stabilizing power supply, monitoring processor, and storage battery are installed in a box disposed on the river bank, so as to avoid the influence of the on-site environment on the operation of the electronic components in the device and realize the all-weather monitoring operation of the device.

[0034] Furthermore, the box and the solar photovoltaic panel are connected with a lightning protection grounding device to prevent damage to the device by lightning.

[0035] Furthermore, the solar photovoltaic panel and the box are connected with a mounting bracket to reliably mount and fix the device.

[0036] The beneficial effects of the present invention are as follows: the method of the present invention adopts a method of setting a pressure-bearing spring at the bottom of the pipeline according to the parameters such as the diameter, deadweight, length, buried soil thickness, soil density, etc. of the underwater oil and gas pipeline in the river; generating a pre-pressure for lifting the pipeline upward, establishing a monitoring and early warning model and early warning method for the risk of pipeline floating, and setting a pre-pressure safety threshold F according to the monitoring and early warning method of the early warning model. a The invention provides early warning for the risk of pipeline floating, comprehensively considers various factors of pipeline operation, and has high accuracy, sensitivity and practicability in monitoring and early warning, which greatly improves the safety and reliability of the operation of underwater oil and gas pipelines in rivers. The invention can make early warning before pipeline floating occurs, so that relevant personnel have enough time to take emergency measures to avoid disasters, thereby avoiding serious safety accidents and major economic losses caused by oil and gas leakage.

[0037] The device of the present invention is powered by solar photovoltaic panels and sends real-time data of the pre-pressure of the pressure-bearing spring of the pipeline to a remote monitoring center through a wireless transmission device, thereby realizing all-weather on-site unattended automated monitoring operation, greatly improving the efficiency of early warning monitoring of pipeline floating risks and the accuracy of risk monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0039] Figure 2 It is a schematic diagram of the implementation of the present invention.

[0040] Parts and numbers in the picture:

[0041] 1-pressure plate; 2-monitoring box; 3-pressure spring; 4-force transmission rod; 5-sliding resistor; 51-voltage-stabilizing power supply; 52-monitoring processor; 53-battery; 54-solar photovoltaic panel; 55-wireless transmission device; 56-box; 57 lightning protection grounding device; 60-installation bracket; 10-pipeline. DETAILED DESCRIPTION

[0042] The following embodiments are used to illustrate a river underwater oil and gas pipeline disaster early warning monitoring device of the present invention, which can realize early forecast and early warning of the buoyancy of the river underwater oil and gas pipeline, greatly reducing the risk of oil and gas pipeline damage, but are not used to limit the protection scope of the present invention.

[0043] like Figure 1 , 2As shown, a river channel underwater oil and gas pipeline disaster early warning monitoring device includes a pressure plate 1 arranged at the bottom of a pipeline 10 for transporting oil and gas underwater in the river channel, and also includes a monitoring box 2, a pressure spring 3, a force transmission rod 4, and a sliding resistor 5. The pressure spring 3 and the sliding resistor 5 are arranged in the watertight monitoring box 2, and the pressure plate 1 is connected to the pressure spring 3 and the sliding resistor 5 through the force transmission rod 4;

[0044] The sliding resistor 5 is connected to a voltage-stabilizing power supply 51 and a monitoring processor 52 which are arranged on the river bank.

[0045] The voltage-stabilized power supply 51 is connected to a battery 53, the battery 53 is connected to a solar photovoltaic panel 54, and the monitoring processor 52 is also connected to a wireless transmission device 55. The real-time pre-pressure data of the pressure-bearing spring 3 at the bottom of the pipeline 10 is sent to a remote monitoring center through the wireless transmission device 55, so as to realize on-site unattended automatic monitoring.

[0046] Furthermore, the monitoring processor 52 includes a single chip microcomputer and an analog-to-digital conversion module, which can convert and calculate the monitoring data of the pressure plate 1.

[0047] Furthermore, the voltage-stabilized power supply 51, monitoring processor 52, and battery 53 are installed in a box 56 disposed on the river bank to avoid the influence of the on-site environment on the operation of the electronic components in the device and realize the all-weather monitoring operation of the device.

[0048] Furthermore, the box 56 and the solar photovoltaic panel 54 are connected to a lightning protection grounding device 57 to prevent damage to the device by lightning.

[0049] Furthermore, the solar photovoltaic panel 54 and the box 56 are connected with a mounting bracket 60 to reliably mount and fix the device.

[0050] The device of the present invention is used for the monitoring and early warning implementation process when the oil and gas pipeline crosses the river, and specifically includes the following steps:

[0051] Step A. A pressure spring 3 is arranged at the bottom of a pipeline 10 for transporting oil and gas underwater in a river; the pressure spring 3 generates a pre-pressure for lifting the pipeline 10 upward through a pressure plate 1, and the pressure spring 3 is connected to a sliding resistor 5, and the sliding resistor 5 converts the pre-pressure value into an electrical signal by connecting to a voltage-stabilizing power supply 51;

[0052] Step B. Establish a critical pressure warning model for pipeline 10, collect data parameters of the river channel and pipeline 10, and define the downward force of pipeline 10 as F n : F n =G1+G2

[0053] G2=ρ s V s g

[0054] V s =l s b s h s

[0055] Where, F n is the vertical downward force on the pipeline 10, in N; G1 is the self-weight pressure of the pipeline 10, which includes the sum of the self-weight of the pipeline 10 and the gravity of the oil and gas transported in the pipeline 10, measured by the actual length of the river through which the pipeline 10 passes, in N; G2 is the soil pressure on the upper part of the pipeline 10, in N; ρ s V is the soil density of the upper part of the pipeline 10; s The buried soil volume above the pipeline 10, in m 3 ; l s is the buried length of the upper part of the pipeline 10, measured by the actual length of the pipeline 10 crossing the river underwater, in meters; b s h is the buried width of the upper part of the pipeline 10, that is, the diameter of the pipeline 10, in m; s is the buried soil thickness of the upper part of the pipeline 10, in m;

[0056] Define the upward force on pipe 10 as F z : F z =F t +F f

[0057] F f =ρ w V 排

[0058] V 排 =l w S w

[0059] F t =k∆x

[0060] Where, F z is the vertical upward force on the pipe 10, in N; F f is the buoyancy generated by the pipe 10 in water, in N; ρ w is the density of water, in kg / m 3 ; g is the acceleration due to gravity, unit is m / s 2 ; V 排 The volume of boiling water in pipe 10, in m 3 ; l w is the length of the pipeline 10, measured by the actual length of the pipeline 10 under water crossing the river, in meters; S w is the cross-sectional area of ​​the pipe, in m 2 ; F tis the preload pressure of the pressure-bearing spring 3 on the pipeline 10, in N; k is the elastic coefficient; ∆x is the deformation of the pressure-bearing spring 3, in m;

[0061] Step C. Set the safety threshold F of the preload of the pressure spring 3 a : F a =λF n

[0062] F 合 =F n -F z ;

[0063] In the formula, F a is the safety threshold of pre-pressure, in N; λ is the safety factor, ranging from 0.2 to 0.3; F n is the vertical downward force, unit is N; F 合 is the resultant force in the vertical direction, in N; F z is the vertical upward force on the pipeline 10, in N;

[0064] F a and F 合 For comparison, F 合 >F a When F 合 ≤F a When the critical state is reached, the pipeline 10 has the risk of floating;

[0065] Step D: Real-time detection of the pre-pressure value Ft converted into an electrical signal by connecting the pressure-bearing spring 3 to the sliding resistor 5. When the pre-pressure value Ft is greater than the safety threshold Fa, the pipeline 10 is in a normal state; when the pre-pressure value Ft is greater than the safety threshold Fa, the pipeline 10 is in a normal state. t Less than or equal to the safety threshold F a When the pipeline 10 enters a floating risk state, the monitoring processor 52 sends a disaster warning to a remote monitoring center through a wireless transmission device 55.

[0066] Among them, the pressure-bearing springs 3 are set to be three equidistantly arranged, so as to realize reliable monitoring of the overall state of the underwater oil and gas pipeline 10 crossing the river, avoid the deviation of the detection data caused by a single accidental difference, and the multiple pressure-bearing springs 3 also realize mutual backup to ensure the accuracy of the detection data and the reliability of the early warning.

[0067] Furthermore, each independent pipeline 10 crossing the underwater river channel is provided with at least three pressure-bearing springs 3 which are arranged equidistantly, so that the unbalanced floating risk state of each independent pipeline 10 can be monitored and warned.

[0068] Wherein, when the pressure bearing spring 3 is provided in plurality, F in step B tIt is the sum of the pre-pressures of the plurality of pressure-bearing springs 3 that generate an upward lifting force on the pipeline 10 .

[0069] Wherein, in step A, the method of converting the pre-pressure of the pressure-bearing spring 3 into an electrical signal is as follows:

[0070] The preload value F of the pressure spring 3 t According to Hooke's law F t =k∆x to obtain the deformation ∆x of the pressure spring 3, where k is the elastic coefficient and ∆x is the deformation of the pressure spring 3, in units of m;

[0071] When the preload value F t Equal to the safety threshold F a When the critical value F of the pressure spring 3 is calculated t , by F t =k∆x, the critical deformation ∆x of the pressure spring 3 can be calculated, where ∆x=L, L is the length of the sliding resistor 5 connected to the circuit of the voltage-stabilized power supply 51, and the corresponding critical resistance value R´ of the sliding resistor 5 at this time is: R´=ρL / S;

[0072] In the formula, R' is the critical resistance, unit Ω; ρ is the resistivity, which is determined by its own properties, unit N; L is the length of the sliding resistor 5 connected to the voltage-stabilized power supply 51 circuit, unit m; S is the cross-sectional area of ​​the sliding resistor 5, unit m 2 ;

[0073] The corresponding critical current value I´ is calculated by Ohm’s law R´=U / I´.

[0074] In the formula, R' is the critical resistance, unit Ω; U is the voltage of the regulated power supply 51, unit V; I' is the critical current, that is, the current threshold, unit A.

[0075] The device of the present invention is powered by a solar photovoltaic panel 54, and the monitoring processor 52 sends the real-time data of the pre-pressure of the pressure-bearing spring 3 of the pipeline 10 to a remote monitoring center through a wireless transmission device 55, thereby realizing all-weather on-site unattended automated monitoring operation, greatly improving the efficiency of monitoring and early warning of the floating risk of the underwater pipeline 10 and the accuracy of monitoring.

[0076] In this specification, the invention has been described with reference to specific embodiments thereof, however, it will be apparent that various modifications may be made without departing from the scope of the invention. Therefore, the description should be regarded as illustrative rather than restrictive.

Claims

1. A method for early warning and monitoring of underwater oil and gas pipeline disasters in a river, characterized in that: The following steps are involved: Step A. A pressure spring is arranged at the bottom of a pipeline for transporting oil and gas underwater in a river; the pressure spring generates a pre-pressure to lift the pipeline upward, the pressure spring is connected to a sliding resistor, and the sliding resistor converts the pre-pressure value into an electrical signal by connecting to a voltage-stabilizing power supply; Step B. Establish a pipeline critical pressure warning model, collect data parameters of the river and pipeline, and define the downward force of the pipeline as F n : F n =G1+G2 G2=ρ s V s g V s =l s b s h s In the formula, F n is the vertical downward force on the pipeline, in N; G1 is the deadweight pressure of the pipeline, which includes the sum of the deadweight of the pipeline and the gravity of the oil and gas in the pipeline, measured by the actual length of the pipeline crossing the river, in N; G2 is the soil pressure on the top of the pipeline, in N; ρ s is the soil density above the pipeline; V s The volume of soil buried above the pipeline, in m 3 ; l s The buried length of the upper part of the pipeline is measured by the actual length of the underwater pipeline crossing the river, in meters; b s h is the buried width of the upper part of the pipeline, that is, the diameter of the pipeline, in meters; s is the soil thickness of the upper part of the pipeline, in m; Define the upward force on the pipe as F z : F z =F t +F f F f =ρ w gV 排 V 排 =l w S w F t =kΔx In the formula, F z is the vertical upward force on the pipeline, unit is N; F f is the buoyancy of the pipe in water, in N; ρ w is the density of water, in kg / m 3 ; g is the acceleration due to gravity, unit is m / s 2 ; V 排 is the volume of water discharged by the pipe, in m 3 ; l w is the pipeline length, measured by the actual length of the underwater pipeline crossing the river, in meters; S w is the cross-sectional area of ​​the pipe, in m 2 ; F t is the preload of the pressure spring on the pipeline, in N; k is the elastic coefficient; Δx is the deformation of the pressure spring, in m; Step C. Set the safety threshold F of the preload of the pressure spring a : F a =λF n F 合 =F n -F z In the formula, F a is the safety threshold of pre-pressure, in N; λ is the safety factor, ranging from 0.2 to 0.3; F n is the vertical downward force, unit is N; F 合 is the resultant force in the vertical direction, in N; F z is the vertical upward force on the pipeline, unit is N; F a and F 合 For comparison, F 合 >F a When F 合 ≤F a When the critical state is reached, the pipeline may float up; Step D: Real-time detection of the preload value F of the pressure-bearing spring connected to the sliding resistor, which is converted into an electrical signal t When the preload value F t Greater than the safety threshold F a When the pre-pressure value F t Less than or equal to the safety threshold F a When the pipeline enters the floating risk state, a disaster warning is issued; In step A, the method of converting the preload of the pressure-bearing spring into an electrical signal is as follows: The preload value F of the pressure spring t According to Hooke's law F t = kΔx to obtain the deformation of the pressure spring Δx, where k is the elastic coefficient and Δx is the deformation of the pressure spring, in units of m; Preload value F t Equal to the safety threshold F a When Δx=L, Δx is the critical deformation of the pressure spring, and the corresponding critical resistance value of the sliding resistance is R′: R′=ρL / S; In the formula, R' is the critical resistance, unit Ω; ρ is the resistivity, which is determined by its own properties, unit N; L is the length of the sliding resistor connected to the voltage-stabilized power supply circuit, unit m; S is the cross-sectional area of ​​the sliding resistor, in m 2 ; The corresponding critical current value I′ is calculated by Ohm’s law R′=U / I′; In the formula, R' is the critical resistance, unit Ω; U is the voltage of the regulated power supply, unit V; I' is the critical current, that is, the current threshold, in A.

2. The method for early warning and monitoring of underwater oil and gas pipeline disasters in a river according to claim 1, characterized in that: The pressure-bearing springs are configured as three equidistantly arranged springs.

3. The method for early warning and monitoring of underwater oil and gas pipeline disasters in a river according to claim 1, characterized in that: Each independent pipeline crossing the river underwater is provided with at least three pressure-bearing springs which are arranged at equal distances.

4. A monitoring device for a method for early warning and monitoring of underwater oil and gas pipeline disasters in a river according to claim 1, comprising a pressure plate (1) arranged at the bottom of a pipeline for transporting oil and gas underwater in a river, characterized in that: The device further comprises a monitoring box (2), a pressure-bearing spring (3), a force-transmitting rod (4), and a sliding resistor (5), wherein the pressure-bearing spring (3) and the sliding resistor (5) are arranged in a watertight monitoring box (2), and the pressure-bearing plate (1) is connected to the pressure-bearing spring (3) and the sliding resistor (5) via the force-transmitting rod (4). The sliding resistor (5) is connected to a voltage-stabilizing power supply (51) and a monitoring processor (52) arranged on the river bank.

5. The monitoring device of the method for early warning monitoring of underwater oil and gas pipeline disasters in a river according to claim 4 is characterized in that: The voltage-stabilized power supply (51) is connected to a storage battery (53), the storage battery (53) is connected to a solar photovoltaic panel (54), and the monitoring processor (52) is also connected to a wireless transmission device (55).

6. The monitoring device of the method for early warning monitoring of underwater oil and gas pipeline disasters in a river according to claim 4 is characterized in that: The monitoring processor (52) comprises a single chip microcomputer and an analog-to-digital conversion module.

7. A monitoring device for a river underwater oil and gas pipeline disaster early warning monitoring method according to any one of claims 4 to 6, characterized in that: The voltage-stabilizing power supply (51), the monitoring processor (52), and the storage battery (53) are installed in a box (56) arranged on the bank of the river.

8. The monitoring device of the method for early warning monitoring of underwater oil and gas pipeline disasters in a river according to claim 7 is characterized in that: The box (56) and the solar photovoltaic panel (54) are connected with a lightning protection grounding device (57).

9. The monitoring device of the method for early warning monitoring of underwater oil and gas pipeline disasters in a river according to claim 8 is characterized in that: The solar photovoltaic panel (54) and the box (56) are connected with a fixing bracket (60).

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