An inner floating roof tank floating disc seal leakage on-line monitoring device and method

Abstract

The present disclosure relates to a kind of inner floating roof tank floating disc seal leakage online monitoring device and method, wherein the device, including: inner floating roof tank, sampling control unit and control unit;The inner side of the inner floating roof tank is provided with floating disc, the first set distance of the upper side of the floating disc is provided with at least one first air extraction mechanism, the second set distance of the upper side variation of the floating disc is provided with at least one second air extraction mechanism;The sampling control unit is respectively connected with the first air extraction mechanism, the second air extraction mechanism and the control unit, for controlling the first air extraction mechanism and the second air extraction mechanism according to the control instruction sent by the control unit to carry out air extraction;The control unit is used to carry out the floating disc seal leakage online monitoring of the inner floating roof tank according to the oil gas concentration of the first air extraction mechanism and the corresponding oil gas concentration variation rule of the second air extraction mechanism variation;Floating disc seal leakage online monitoring can be realized.

Description

Technical Field

[0001] This disclosure relates to the field of online monitoring technology for leaks in the floating roof seal of an internal floating roof tank, and particularly to an online monitoring device and method, electronic equipment and storage medium for leaks in the floating roof seal of an internal floating roof tank. Background Technology

[0002] With the rapid economic and social development brought about by economic globalization, the energy demand of the petrochemical industry has been increasing year by year. Currently, my country has become the fastest-growing consumer of crude oil. Therefore, having greater oil reserve capacity has become a prerequisite for the steady development of the petrochemical industry. Large floating roof tanks, as an excellent storage medium, are favored by most countries due to their superior storage capacity and stable performance. The construction of large floating roof oil storage tanks has become a development trend in oil reserves.

[0003] Internal floating roof tanks are crucial equipment for storing refined oil products and related chemical products. Because their floating roofs are closely attached to the storage medium, they significantly reduce the evaporation of oil and gas, thus minimizing evaporation losses during storage. However, the floating roof seals are tightly fitted to the tank wall. Under the influence of external forces and environmental factors, the elasticity of the seals can decrease, creating gaps between the seals and the tank wall. This creates an interface between the oil and gas medium and the outside environment. Under the influence of external environmental factors such as solar radiation, the oil and gas medium can evaporate to the surface of the floating roof and then diffuse above it. On the one hand, the diffusion of oil and gas into the atmosphere causes some damage to the ecological environment; on the other hand, the oil and gas accumulating above the floating roof can easily cause fires and explosions during thunderstorms or droughts, causing unnecessary disruption to workers' operations and seriously threatening the safety of personnel and property. Summary of the Invention

[0004] This disclosure presents a technical solution for an online monitoring device and method for leakage of the floating roof seal of an internal floating roof tank.

[0005] According to one aspect of this disclosure, an online monitoring device for leakage of the floating roof seal of an internal floating roof tank is provided, comprising: an internal floating roof tank, a sampling control unit, and a control unit;

[0006] The inner floating roof tank is provided with a floating roof, and at least one first air extraction mechanism is provided at a first set distance on the upper side of the floating roof, and at least one second air extraction mechanism is provided at a variable second set distance on the upper side of the floating roof.

[0007] The sampling control unit is connected to the first suction mechanism, the second suction mechanism and the control unit respectively, and is used to control the first suction mechanism and the second suction mechanism to perform suction according to the control command sent by the control unit;

[0008] The control unit is used to perform online monitoring of the floating roof seal leakage of the internal floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism.

[0009] Preferably, the sampling control unit includes: a first control actuator and a second control actuator, and / or, a power mechanism;

[0010] The first control actuator and the second control actuator are respectively installed on the connecting pipes of the first air extraction mechanism and the second air extraction mechanism, and are used to control the opening or closing of the connecting pipes;

[0011] The power mechanism is used to provide suction power for the first suction mechanism and the second suction mechanism.

[0012] Preferably, the first control actuator includes a first solenoid valve; the second control actuator includes a second solenoid valve; and / or, the power mechanism includes an air pump.

[0013] The first solenoid valve and the second solenoid valve are respectively installed on the connecting pipes of the first air extraction mechanism and the second air extraction mechanism.

[0014] The first and second suction mechanisms are respectively connected to the air pump, and the air pump is used to provide suction power for the first and second suction mechanisms.

[0015] Preferably, the first and second extraction mechanisms each include a first sampling mechanism and a second sampling mechanism, and the control unit includes a gas analyzer.

[0016] The first sampling mechanism is fixed to the upper side of the floating plate by a fixing mechanism and connected to the gas analyzer through a pipeline; the second sampling mechanism is connected to the gas analyzer through a telescopic and / or angle adjustment mechanism.

[0017] And / or,

[0018] It also includes: a leakage rate determination unit, wherein the leakage rate determination unit includes:

[0019] The acquisition unit is used to acquire the first and second partial pressure values ​​corresponding to the first sampling hole of the first suction mechanism and the second sampling hole of the second suction mechanism, as well as the distance between the first and second sampling holes;

[0020] The first determining unit is used to determine the mass flux density per unit time based on the first partial pressure value, the second partial pressure value and the distance;

[0021] The second determining unit is used to determine the floating roof oil and gas leakage rate of the internal floating roof tank based on the mass flux density and the inner radius of the internal floating roof tank.

[0022] And / or,

[0023] The rule determination unit corresponding to the oil and gas concentration change rule of the modified second extraction mechanism includes:

[0024] The air extraction motion control unit is used to determine the current position of the second air extraction mechanism, and determine the movement direction of the second air extraction mechanism based on the current position and multiple variable preset second distances; control the extension and / or angle adjustment mechanism of the second air extraction mechanism to drive the second air extraction mechanism to move according to the movement direction; when the second air extraction mechanism reaches the preset second distance, control the second air extraction mechanism to stop moving and the second air extraction mechanism to perform air extraction.

[0025] The construction unit is used to construct the oil and gas concentration change rules corresponding to the variable second extraction mechanism based on the oil and gas concentrations corresponding to the multiple variable preset second set distances.

[0026] And / or,

[0027] It also includes: a server (15) and a monitoring terminal (16);

[0028] The control unit communicates with the monitoring terminal (16) through the server (15) and sends the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal (16).

[0029] Preferably, a first filtration mechanism and a second filtration mechanism are respectively provided on the outer side of the first sampling mechanism and the second sampling mechanism.

[0030] According to one aspect of this disclosure, an online monitoring method and apparatus for leak detection of floating roof seals in internal floating roof tanks is provided, comprising:

[0031] Obtain control commands;

[0032] According to the control command, the first air extraction mechanism located at a first set distance above the floating roof inside the inner floating roof tank is controlled to perform air extraction, and / or the second air extraction mechanism located at a second set distance above the floating roof is controlled to perform air extraction.

[0033] Based on the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism, online monitoring of the floating roof seal leakage of the internal floating roof tank is carried out.

[0034] Preferably, the method further includes: determining the oil and gas leakage rate of the floating roof, wherein the method for determining the rate includes:

[0035] Obtain the first and second partial pressure values ​​corresponding to the first sampling hole of the first suction mechanism and the second sampling hole of the second suction mechanism, as well as the distance between the first and second sampling holes;

[0036] The mass flux density per unit time is determined based on the first partial pressure value, the second partial pressure value, and the distance.

[0037] And based on the mass flux density and the inner radius of the inner floating roof tank, the floating roof oil and gas leakage rate of the inner floating roof tank is determined;

[0038] And / or,

[0039] The method for determining the rule corresponding to the change in oil and gas concentration for the modified second extraction mechanism includes:

[0040] The current position of the second suction mechanism is determined, and the movement direction of the second suction mechanism is determined based on the current position and multiple variable preset second distances; the movement of the second suction mechanism is controlled according to the movement direction; when the second suction mechanism reaches the preset second distance, the movement of the second suction mechanism is stopped, and the second suction mechanism performs suction.

[0041] Based on the oil and gas concentrations corresponding to the multiple preset second distances, construct the oil and gas concentration variation rules corresponding to the variable second extraction mechanism;

[0042] And / or, also includes:

[0043] Establish a connection between the control unit and the server;

[0044] The control unit communicates with the monitoring terminal through the server and sends the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal.

[0045] According to one aspect of this disclosure, an electronic device is provided, comprising:

[0046] processor;

[0047] Memory used to store processor-executable instructions;

[0048] The processor is configured to execute the above-described online monitoring method for leaks in the floating roof seal of the internal floating roof tank.

[0049] According to one aspect of this disclosure, a computer-readable storage medium is provided having computer program instructions stored thereon, which, when executed by a processor, implement the above-described online monitoring method for leakage of the floating roof seal of an internal floating roof tank.

[0050] In this embodiment, an online monitoring device and method for leaking the floating roof seal of an internal floating roof tank is provided. It can continuously monitor the oil and gas above the floating roof, select appropriate detection positions according to different heights of the floating roof, and achieve continuous monitoring 24 hours a day, which greatly reduces the cost of manual inspection.

[0051] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0052] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0054] Figure 1 A schematic diagram of an online monitoring device for leaking the floating roof seal of an internal floating roof tank according to an embodiment of the present disclosure is shown.

[0055] Figure 2 A schematic diagram showing the connection between the first and second air extraction mechanisms and the sampling control unit according to an embodiment of the present disclosure is provided.

[0056] Figure 3 A flowchart illustrating an online monitoring method for leaks in the floating roof seal of an internal floating roof tank according to an embodiment of the present disclosure is shown.

[0057] Figure 4 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment;

[0058] Figure 5 This is a block diagram illustrating an electronic device 1900 according to an exemplary embodiment. Detailed Implementation

[0059] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0060] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0061] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0062] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0063] Figure 1 A schematic diagram of an online monitoring device for leaking the floating roof seal of an internal floating roof tank according to an embodiment of this disclosure is shown; as follows: Figure 1 As shown, the online monitoring device for leaking the floating roof seal of the internal floating roof tank includes: an internal floating roof tank, a sampling control unit, and a control unit. A floating roof is disposed on the inner side of the internal floating roof tank. At least one first suction mechanism is disposed at a first predetermined distance above the floating roof, and at least one second suction mechanism is disposed at a variable second predetermined distance above the floating roof. The sampling control unit is connected to the first suction mechanism, the second suction mechanism, and the control unit, respectively, and is used to control the first and second suction mechanisms to perform suction according to control commands sent by the control unit. The control unit is used to perform online monitoring of leaking the floating roof seal of the internal floating roof tank according to the oil and gas concentration changes of the first suction mechanism and the corresponding oil and gas concentration changes of the variable second suction mechanism. It can continuously monitor the oil and gas above the floating roof, select appropriate detection positions according to different floating roof heights, and achieve continuous 24-hour monitoring, greatly reducing the cost of manual inspection.

[0064] In the embodiments of this disclosure, the position of the second suction mechanism can be adjusted to achieve suction of oil and gas at a second set distance on the upper side of the floating disk, thereby obtaining the oil and gas concentration change rule corresponding to the second set distance on the upper side of the floating disk.

[0065] In embodiments of this disclosure and other possible embodiments, the second suction mechanism is located directly above the first suction mechanism.

[0066] In the embodiments of this disclosure and other possible embodiments, if the oil and gas concentration of the first extraction mechanism conforms to the oil and gas concentration change rule, the floating roof is in a sealed state and there is no leakage; otherwise, the floating roof is in a non-sealed state and there is leakage; so as to realize online monitoring of the floating roof sealing leakage of the internal floating roof tank.

[0067] In the embodiments of this disclosure, the rule determination unit corresponding to the oil and gas concentration change rule of the variable second suction mechanism includes: a suction motion control unit, used to determine the current position of the second suction mechanism, and determine the movement direction of the second suction mechanism according to the current position and multiple variable preset second set distances; control the movement of the second suction mechanism according to the movement direction; when the second suction mechanism reaches the preset second distance, control the second suction mechanism to stop moving and the second suction mechanism to perform suction; and a construction unit, used to construct the oil and gas concentration change rule corresponding to the variable second suction mechanism according to the oil and gas concentrations corresponding to the multiple variable preset second set distances.

[0068] In embodiments of this disclosure and other possible embodiments, the control unit may include the above-described air extraction motion control unit and the building unit.

[0069] In the embodiments of this disclosure and other possible embodiments, the plurality of variable preset second set distances include: a plurality of position points on the upper side of the floating platform; and determining the movement direction of the second air extraction mechanism based on the current position and a specified position point among the plurality of position points.

[0070] In embodiments of this disclosure and other possible embodiments, the method for constructing the oil and gas concentration variation rule corresponding to the variable second extraction mechanism based on the oil and gas concentrations corresponding to the plurality of variable preset second set distances includes: fitting the oil and gas concentrations corresponding to the plurality of variable preset second set distances to obtain a fitting equation (distance-concentration fitting equation) to construct the oil and gas concentration variation rule corresponding to the variable second extraction mechanism. The fitting method for the fitting equation can be a linear fitting method, a nonlinear fitting method, or other fitting methods. Those skilled in the art can select a suitable fitting method according to actual needs.

[0071] Specifically, in the embodiments of this disclosure and other possible embodiments, if the oil and gas concentration of the first extraction mechanism conforms to the oil and gas concentration change rule, the method for the floating roof to be in a sealed state includes: obtaining the oil and gas concentration of the first extraction mechanism at a first set distance; determining the theoretical oil and gas concentration according to the fitting equation and the first set distance; and determining the sealing state of the floating roof according to the oil and gas concentration.

[0072] More specifically, the method for determining the theoretical oil and gas concentration based on the fitting equation and the first set distance includes: obtaining the first set distance corresponding to the first extraction mechanism and the fitting equation; substituting the first set distance into the fitting equation to obtain the theoretical oil and gas concentration. The method for determining the sealing state of the floating roof based on the oil and gas concentration includes: if the oil and gas concentration is less than or equal to the oil and gas concentration, there is no leakage; otherwise, the floating roof is in a non-sealed state, and there is leakage; thus achieving online monitoring of the floating roof seal leakage of the internal floating roof tank.

[0073] In embodiments of this disclosure, the sampling control unit includes: a first control actuator, a second control actuator, and / or a power mechanism; the first control actuator and the second control actuator are respectively installed on the connecting pipes of the first suction mechanism and the second suction mechanism, for controlling the opening or closing of the connecting pipes; the power mechanism is used to provide suction power to the first suction mechanism and the second suction mechanism.

[0074] For example, if the control command is to control the first air extraction mechanism to extract air, then the first control execution mechanism and the power mechanism are started, and the second control execution mechanism is turned off, and the first control execution mechanism extracts air.

[0075] For example, if the control command is to control the second air extraction mechanism to perform air extraction, then the second control execution mechanism and the power mechanism are started, and the first control execution mechanism is shut down, and the second control execution mechanism performs air extraction.

[0076] In embodiments of this disclosure, the first control actuator includes a first solenoid valve 3; the second control actuator includes a second solenoid valve 4; and / or, the power mechanism includes an air pump 1; the first solenoid valve 3 and the second solenoid valve 4 are respectively installed on the connecting pipelines of the first suction mechanism and the second suction mechanism; the first suction mechanism and the second suction mechanism are respectively connected to the air pump 1, and the air pump 1 is used to provide suction power for the first suction mechanism and the second suction mechanism.

[0077] For example, if the control command is to control the first suction mechanism to perform suction, then the first solenoid valve 3 and the air pump 1 are started, and the second solenoid valve 4 is closed, and the first control actuator performs suction.

[0078] For example, if the control command is to control the second suction mechanism to perform suction, then the second solenoid valve 4 and the air pump 1 are started, and the first solenoid valve 3 is closed, and the second control actuator performs suction.

[0079] In embodiments of this disclosure, the first and second extraction mechanisms each include a first sampling mechanism and a second sampling mechanism. The control unit includes a gas analyzer 13. The first sampling mechanism is fixed to the upper side of the floating plate by a fixing mechanism and connected to the gas analyzer 13 via a pipeline. The second sampling mechanism is connected to the gas analyzer 13 via a telescopic and / or angle adjustment mechanism. The gas analyzer 13 is used to analyze the oil and gas concentrations of the first and second extraction mechanisms.

[0080] In embodiments of this disclosure and other possible embodiments, the second sampling mechanism of the second suction mechanism is located directly above the first sampling mechanism of the first suction mechanism.

[0081] In the embodiments of this disclosure, a first filter mechanism 11 and a second filter mechanism 12 are respectively provided on the outer sides of the first sampling mechanism and the second sampling mechanism. The first filter mechanism 11 and the second filter mechanism 12 are used for dust filtration of the first sampling mechanism and the second sampling mechanism, respectively.

[0082] In the embodiments of this disclosure, the device further includes: a server 15 and a monitoring terminal 16; the control unit communicates with the monitoring terminal 16 through the server 15 to send the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal 16.

[0083] In embodiments of this disclosure and other possible embodiments, the control unit includes: a controller 14, the controller 14 being configured to perform online monitoring of the floating roof seal leakage of the internal floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism. And / or, the controller 14 is further configured to acquire a first partial pressure value and a second partial pressure value corresponding to the first sampling hole of the first extraction mechanism and the second sampling hole of the second extraction mechanism, and the distance between the first sampling hole and the second sampling hole; to determine the mass flux density per unit time based on the first partial pressure value, the second partial pressure value, and the distance; and to determine the mass flux density per unit time based on the first partial pressure value, the second partial pressure value, and the distance. And / or, the controller 14 is further configured to determine the current position of the second suction mechanism, determine the movement direction of the second suction mechanism based on the current position and multiple varying preset second set distances; control the extension and / or angle adjustment mechanism of the second suction mechanism to drive the second suction mechanism to move according to the movement direction; when the second suction mechanism reaches the preset second distance, control the second suction mechanism to stop moving and the second suction mechanism to perform suction; and construct the oil and gas concentration change rule corresponding to the varying second suction mechanism based on the oil and gas concentration corresponding to the multiple varying preset second set distances.

[0084] In embodiments of this disclosure and other possible embodiments, the controller 14 may be a microcontroller or a computer. More specifically, the controller may also be an application-specific integrated circuit (ASIC), a digital signal controller (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a programmable logic controller (PLC), a microcontroller (MCU), or other electronic components or circuits with comparison or calculation functions, such as a comparator or a comparison circuit.

[0085] In the embodiments of this disclosure and other possible embodiments, the monitoring terminal 16 can be one or more of the following: user equipment (UE), mobile device, user terminal, terminal, cellular phone, cordless phone, personal digital assistant (PDA), handheld device, computing device, vehicle device, wearable device, etc. Those skilled in the art can select the monitoring terminal 16 according to actual needs.

[0086] In the embodiments of this disclosure, the online monitoring device for leakage of the floating roof seal of the internal floating roof tank further includes: a leakage rate determination unit, which includes: an acquisition unit, used to acquire a first partial pressure value and a second partial pressure value corresponding to the first sampling hole of the first extraction mechanism and the second sampling hole of the second extraction mechanism, as well as the distance between the first sampling hole and the second sampling hole; a first determination unit, used to determine the mass flux density per unit time based on the first partial pressure value, the second partial pressure value and the distance; and a second determination unit, used to determine the oil and gas leakage rate of the floating roof of the internal floating roof tank based on the mass flux density and the inner radius of the internal floating roof tank.

[0087] In the embodiments of this disclosure and other possible embodiments, the acquisition unit further acquires the gas constant of the oil and gas medium, the standard atmospheric pressure value, the oil and gas medium diffusion coefficient, and the ambient temperature; the first determination unit is used to determine the mass flux density per unit time based on the gas constant of the oil and gas medium, the standard atmospheric pressure value, the oil and gas medium diffusion coefficient, the ambient temperature, the first partial pressure value, the second partial pressure value, and the distance.

[0088] In embodiments of this disclosure and other possible embodiments, the oil and gas leakage rate of the internal floating roof tank can be calculated based on the following expression.

[0089]

[0090] Where M is the mass flux density per unit time, kg / (m³) 2 .s -1 ); R q P0 is the gas constant of the oil and gas medium, J / (mol·K); the recommended molecular weight for gasoline is 64; P0 is standard atmospheric pressure, 1.01 × 102 5 Pa; P a1 P a2 P represents the partial pressure of air in the first and second extraction mechanisms, respectively. a =P0-P q P q Δx is the partial pressure corresponding to the oil and gas sampling concentration at this point, in Pa; Δx is the vertical distance between the first and second extraction mechanisms; T is the qualitative temperature of the oil and gas, taken as ambient temperature, in K; D is the diffusion coefficient of the oil and gas medium. Where D0 is the mass diffusion coefficient at a known temperature T0, m 2 / s; T0, K. Internal floating roof tank floating roof oil and gas leakage velocity: Q=Mπr 2 , kg / (s -1 ), where r is the inner radius of the internal floating roof tank, in meters.

[0091] In embodiments of this disclosure and other possible embodiments, preset conditions are obtained before determining the oil and gas leakage rate of the floating roof; the oil and gas leakage rate of the floating roof is determined under the premise that the preset conditions are met. Specifically, the preset conditions include at least: temperature conditions and wind speed conditions; the oil and gas leakage rate of the floating roof is determined under the condition that the temperature conditions and wind speed are met.

[0092] In the embodiments of this disclosure and other possible embodiments, the preset conditions include at least: temperature conditions and wind speed conditions; the method for determining the oil and gas leakage rate of the floating roof under the condition of satisfying the temperature conditions and wind speed conditions includes: acquiring the ambient temperature and the temperature of the storage medium in the inner floating roof tank; if the ambient temperature is greater than the temperature of the storage medium in the inner floating roof tank, a temperature condition is formed; under the temperature condition, acquiring the ambient wind speed; if the ambient wind speed is less than the set wind speed, a wind speed condition is formed; if the temperature condition and the wind speed condition are satisfied simultaneously, it can be considered that the oil and gas medium in the space above the floating roof of the inner floating roof tank is in the free diffusion stage, and the oil and gas leakage rate of the floating roof is determined.

[0093] Figure 2 A schematic diagram showing the connection between the first and second suction mechanisms and the sampling control unit according to embodiments of the present disclosure is provided. To enable those skilled in the art to better implement and understand this disclosure, in conjunction with… Figure 1 and Figure 2 This disclosure will now be explained in detail.

[0094] exist Figure 1 and 2 In this configuration, the first and second air extraction mechanisms are connected to the power mechanism of the control unit via connecting parts. The first and second control actuators of the control unit are respectively installed on the connecting pipes of the first and second air extraction mechanisms. Specifically, the first and second air extraction mechanisms are connected to the air pump 1 of the control unit via connecting parts (three-way connector 2). The first solenoid valve 3 and the second solenoid valve 4 of the control unit are respectively installed on the connecting pipes of the first and second air extraction mechanisms.

[0095] exist Figure 1 and 2In this configuration, the first and second suction mechanisms each include a first sampling mechanism and a second sampling mechanism. The first sampling mechanism is fixed to the upper side of the floating roof via a fixing mechanism and connected to the gas analyzer of the control unit via a pipeline. The second sampling mechanism is connected to the gas analyzer of the control unit via a telescopic and / or angle adjustment mechanism. Specifically, the first sampling mechanism (fixed sampling port 9) of the first suction mechanism is connected to the power mechanism (air pump 1) via a pipeline (first flexible hose 5) and a connecting member (T-joint 2). The air pump 1 is also connected to the gas analyzer of the control unit via a pipeline (second flexible hose 6). The second sampling mechanism (follow-up sampling port 10) of the second suction mechanism is connected to the power mechanism (air pump 1) via a telescopic and / or angle adjustment mechanism (retractable flexible hose 7 or robotic arm) and a connecting member (T-joint 2). The air pump 1 is also connected to the gas analyzer of the control unit via a pipeline (second flexible hose 6). The first flexible hose 5 can be wound around the retractable flexible hose 7, and the air pump 1 is fixed to the top of the inner floating roof tank.

[0096] Furthermore, in the expression for calculating the oil and gas leakage velocity of the internal floating roof tank, P a1 P a2 These are the partial pressures of air at the fixed sampling hole 9 of the first air extraction mechanism and the follower sampling hole 10 of the second air extraction mechanism, respectively, and Δx is the vertical distance between the fixed sampling hole 9 of the first air extraction mechanism and the follower sampling hole 10 of the second air extraction mechanism.

[0097] exist Figure 1 and 2 In this process, the first filter mechanism 11 and the second filter mechanism 12 can be dust collection bags.

[0098] exist Figure 1 and 2 In this process, the first air extraction mechanism is fixed to the upper side of the floating plate by a fixing mechanism. Specifically, the fixing mechanism is a bracket 8.

[0099] based on Figure 1 and Figure 2The workflow of this disclosure is as follows: Air pump 1 is turned on, first solenoid valve 3 is turned on, and second solenoid valve 4 is turned off. Air is drawn from the fixed sampling port 9, 0.3-0.6m above the center of the floating roof. The gas enters the gas analyzer 13 after passing through the first hose 5. The gas analyzer 13 obtains the oil and gas concentration at 0.3-0.6m above the center of the floating roof. The controller 14 performs online monitoring of the floating roof seal leakage of the inner floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism. The online monitoring results are transmitted to the server 15 and distributed to the monitoring terminal 16 as needed. In addition, when air pump 1 is turned on, first solenoid valve 3 is turned off and second solenoid valve 4 is turned on. Air is drawn from different positions above the floating roof through the follow-up sampling port 10 under the action of the retractable hose 7 to obtain the oil and gas concentration change rules corresponding to the changing second extraction mechanism.

[0100] Figure 3 A flowchart illustrating an online monitoring method for floating roof seal leakage of an internal floating roof tank according to an embodiment of the present disclosure is shown, such as... Figure 3 As shown, the online monitoring method for leakage of the floating roof seal of the internal floating roof tank includes: step S101: obtaining a control command; step S102: according to the control command, controlling a first air extraction mechanism located at a first set distance above the floating roof inside the internal floating roof tank to perform air extraction, and / or a second air extraction mechanism located at a second set distance above the floating roof to perform air extraction; step S103: performing online monitoring of leakage of the floating roof seal of the internal floating roof tank according to the oil and gas concentration of the first air extraction mechanism and the oil and gas concentration change rules corresponding to the changed second air extraction mechanism.

[0101] In embodiments of this disclosure, the method further includes: determining the oil and gas leakage rate of the floating roof, the method of determination including: obtaining a first partial pressure value and a second partial pressure value corresponding to a first sampling hole of the first extraction mechanism and a second sampling hole of the second extraction mechanism, and the distance between the first sampling hole and the second sampling hole; determining the mass flux density per unit time based on the first partial pressure value, the second partial pressure value and the distance; and determining the oil and gas leakage rate of the floating roof of the inner floating roof tank according to the mass flux density and the inner radius of the inner floating roof tank.

[0102] In embodiments of this disclosure, a method for determining the rule corresponding to the change in oil and gas concentration of the variable second extraction mechanism includes: determining the current position of the second extraction mechanism; determining the movement direction of the second extraction mechanism based on the current position and multiple variable preset second distances; controlling the movement of the second extraction mechanism according to the movement direction; controlling the second extraction mechanism to stop moving when the second extraction mechanism reaches the preset second distance, and the second extraction mechanism to perform extraction; and constructing the oil and gas concentration change rule corresponding to the variable second extraction mechanism based on the oil and gas concentrations corresponding to the multiple variable preset second distances.

[0103] In the embodiments of this disclosure, the method involves establishing a connection between the control unit and the server; the control unit communicates with the monitoring terminal through the server to send the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal.

[0104] In some embodiments, the methods provided in this disclosure can be specifically implemented with reference to the description of the embodiments corresponding to the devices above, and for the sake of brevity, they will not be described again here.

[0105] It is understood that the various method embodiments mentioned above in this disclosure can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this disclosure will not elaborate further.

[0106] In addition, this disclosure also provides an online monitoring device, electronic equipment, computer-readable storage medium, and program for leaking floating roof seals of internal floating roof tanks. All of the above can be used to implement any of the online monitoring methods for leaking floating roof seals of internal floating roof tanks provided in this disclosure. The corresponding technical solutions and descriptions are described in the corresponding section of the method and will not be repeated here.

[0107] The execution entity of the online monitoring method for leaks in the floating roof seal of an internal floating roof tank can be a signal processing device. For example, the online monitoring method for leaks in the floating roof seal of an internal floating roof tank can be executed by a terminal device, a server, or other processing equipment. The terminal device can be user equipment (UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (PDA), a handheld device, a computing device, an in-vehicle device, a wearable device, etc. In some possible implementations, the online monitoring method for leaks in the floating roof seal of an internal floating roof tank can be implemented by a processor calling computer-readable instructions stored in memory.

[0108] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0109] In addition, this disclosure also proposes an online monitoring device for leakage of the floating roof seal of an internal floating roof tank. The device includes: an acquisition unit for acquiring control commands; a control unit for controlling a first suction mechanism located at a first predetermined distance above the floating roof inside the internal floating roof tank to perform suction, and / or a second suction mechanism located at a second predetermined distance above the floating roof to perform suction, according to the control commands; and a monitoring unit for performing online monitoring of leakage of the floating roof seal of the internal floating roof tank according to the oil and gas concentration of the first suction mechanism and the oil and gas concentration change rules corresponding to the changed second suction mechanism.

[0110] In some embodiments, the functions or modules of the apparatus provided in this disclosure can be used to perform the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0111] This disclosure also proposes a computer-readable storage medium storing computer program instructions that, when executed by a processor, implement the above-described method. The computer-readable storage medium may be a non-volatile computer-readable storage medium.

[0112] This disclosure also proposes an electronic device, including: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured as described above. The electronic device may be provided as a terminal, a server, or other type of device.

[0113] Figure 4 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment. For example, the electronic device 800 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, or other terminal.

[0114] Reference Figure 4 The electronic device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output (I / O) interface 812, a sensor component 814, and a communication component 816.

[0115] Processing component 802 typically controls the overall operation of electronic device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0116] Memory 804 is configured to store various types of data to support the operation of electronic device 800. Examples of this data include instructions for any application or method operating on electronic device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0117] Power supply component 806 provides power to various components of electronic device 800. Power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 800.

[0118] Multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the electronic device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0119] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when electronic device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0120] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0121] Sensor assembly 814 includes one or more sensors for providing state assessments of various aspects of electronic device 800. For example, sensor assembly 814 can detect the on / off state of electronic device 800, the relative positioning of components such as the display and keypad of electronic device 800, changes in position of electronic device 800 or a component of electronic device 800, the presence or absence of user contact with electronic device 800, orientation or acceleration / deceleration of electronic device 800, and temperature changes of electronic device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0122] Communication component 816 is configured to facilitate wired or wireless communication between electronic device 800 and other devices. Electronic device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0123] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), control units, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0124] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 804 including computer program instructions that can be executed by a processor 820 of an electronic device 800 to perform the above-described method.

[0125] Figure 5 This is a block diagram illustrating an electronic device 1900 according to an exemplary embodiment. For example, the electronic device 1900 may be provided as a server. (Refer to...) Figure 5 The electronic device 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by the processing component 1922. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the methods described above.

[0126] Electronic device 1900 may also include a power supply component 1926 configured to perform power management of electronic device 1900, a wired or wireless network interface 1950 configured to connect electronic device 1900 to a network, and an input / output (I / O) interface 1958. Electronic device 1900 can operate on an operating system stored in memory 1932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0127] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions that can be executed by a processing component 1922 of an electronic device 1900 to perform the above-described method.

[0128] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0129] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0130] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0131] Computer program instructions used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing the status information of the computer-readable program instructions to implement various aspects of this disclosure.

[0132] Various aspects of this disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0133] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0134] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0135] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0136] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An online monitoring device for leakage of the floating roof seal of an internal floating roof tank, characterized in that, include: Internal floating roof tank, sampling control unit and control unit; The inner floating roof tank is provided with a floating roof, and at least one first air extraction mechanism is provided at a first set distance on the upper side of the floating roof, and at least one second air extraction mechanism is provided at a variable second set distance on the upper side of the floating roof. The sampling control unit is connected to the first suction mechanism, the second suction mechanism and the control unit respectively, and is used to control the first suction mechanism and the second suction mechanism to perform suction according to the control command sent by the control unit; The control unit is used to perform online monitoring of the floating roof seal leakage of the internal floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rule corresponding to the variable second extraction mechanism, including: fitting the oil and gas concentration corresponding to multiple variable preset second set distances to obtain the fitting equation of the pair, so as to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism, and perform online monitoring of the floating roof seal leakage of the internal floating roof tank.

2. The online monitoring device for leakage of the floating roof seal of the internal floating roof tank according to claim 1, characterized in that, The sampling control unit includes: a first control actuator, a second control actuator, and a power mechanism; The first control actuator and the second control actuator are respectively installed on the connecting pipes of the first air extraction mechanism and the second air extraction mechanism, and are used to control the opening or closing of the connecting pipes; The power mechanism is used to provide suction power for the first suction mechanism and the second suction mechanism.

3. The online monitoring device for leakage of the floating roof seal of the internal floating roof tank according to claim 2, characterized in that, The first control actuator includes: a first solenoid valve (3); the second control actuator includes: a second solenoid valve (4); and the power mechanism includes: an air pump (1). The first solenoid valve (3) and the second solenoid valve (4) are respectively installed on the connecting pipes of the first suction mechanism and the second suction mechanism; The first and second suction mechanisms are respectively connected to the air pump (1), and the air pump (1) is used to provide suction power for the first and second suction mechanisms.

4. The online monitoring device for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 1-3, characterized in that, The first and second extraction mechanisms each include a first sampling mechanism and a second sampling mechanism; the control unit includes a gas analyzer. The first sampling mechanism is fixed to the upper side of the floating plate by a fixing mechanism and connected to the gas analyzer through a pipeline. The second sampling mechanism is connected to the gas analyzer through a telescopic and / or angle adjustment mechanism.

5. The online monitoring device for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 1-3, characterized in that, Also includes: A leakage rate determination unit, comprising: The acquisition unit is used to acquire the first and second partial pressure values ​​corresponding to the first sampling hole of the first suction mechanism and the second sampling hole of the second suction mechanism, as well as the distance between the first and second sampling holes; The first determining unit is used to determine the mass flux density per unit time based on the first partial pressure value, the second partial pressure value and the distance; The second determining unit is used to determine the floating roof oil and gas leakage rate of the internal floating roof tank based on the mass flux density and the inner radius of the internal floating roof tank.

6. The online monitoring device for leakage of the floating roof seal of the internal floating roof tank according to claim 4, characterized in that, Also includes: A leakage rate determination unit, comprising: The acquisition unit is used to acquire the first and second partial pressure values ​​corresponding to the first sampling hole of the first suction mechanism and the second sampling hole of the second suction mechanism, as well as the distance between the first and second sampling holes; The first determining unit is used to determine the mass flux density per unit time based on the first partial pressure value, the second partial pressure value and the distance; The second determining unit is used to determine the floating roof oil and gas leakage rate of the internal floating roof tank based on the mass flux density and the inner radius of the internal floating roof tank.

7. The online monitoring device for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 1-3 and 6, characterized in that, The rule determination unit corresponding to the oil and gas concentration change rule of the modified second extraction mechanism includes: The air extraction motion control unit is used to determine the current position of the second air extraction mechanism, and determine the movement direction of the second air extraction mechanism based on the current position and multiple variable preset second distances; control the extension and / or angle adjustment mechanism of the second air extraction mechanism to drive the second air extraction mechanism to move according to the movement direction; when the second air extraction mechanism reaches the preset second distance, control the second air extraction mechanism to stop moving and the second air extraction mechanism to perform air extraction. The construction unit is used to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism based on the oil and gas concentration corresponding to the multiple variable preset second set distances. The construction unit includes: fitting the oil and gas concentration corresponding to the multiple variable preset second set distances to obtain the fitting equation of the formula, so as to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism and perform online monitoring of the floating roof seal leakage of the internal floating roof tank.

8. The online monitoring device for leakage of the floating roof seal of the internal floating roof tank according to claim 4, characterized in that, The rule determination unit corresponding to the oil and gas concentration change rule of the modified second extraction mechanism includes: The air extraction motion control unit is used to determine the current position of the second air extraction mechanism, and determine the movement direction of the second air extraction mechanism based on the current position and multiple variable preset second distances; control the extension and / or angle adjustment mechanism of the second air extraction mechanism to drive the second air extraction mechanism to move according to the movement direction; when the second air extraction mechanism reaches the preset second distance, control the second air extraction mechanism to stop moving and the second air extraction mechanism to perform air extraction. The construction unit is used to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism based on the oil and gas concentration corresponding to the multiple variable preset second set distances. The construction unit includes: fitting the oil and gas concentration corresponding to the multiple variable preset second set distances to obtain the fitting equation of the formula, so as to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism and perform online monitoring of the floating roof seal leakage of the internal floating roof tank.

9. The online monitoring device for leakage of the floating roof seal of the internal floating roof tank according to claim 5, characterized in that, The rule determination unit corresponding to the oil and gas concentration change rule of the modified second extraction mechanism includes: The air extraction motion control unit is used to determine the current position of the second air extraction mechanism, and determine the movement direction of the second air extraction mechanism based on the current position and multiple variable preset second distances; control the extension and / or angle adjustment mechanism of the second air extraction mechanism to drive the second air extraction mechanism to move according to the movement direction; when the second air extraction mechanism reaches the preset second distance, control the second air extraction mechanism to stop moving and the second air extraction mechanism to perform air extraction. The construction unit is used to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism based on the oil and gas concentration corresponding to the multiple variable preset second set distances. The construction unit includes: fitting the oil and gas concentration corresponding to the multiple variable preset second set distances to obtain the fitting equation of the formula, so as to construct the oil and gas concentration change rule corresponding to the variable second extraction mechanism and perform online monitoring of the floating roof seal leakage of the internal floating roof tank.

10. The online monitoring device for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 1-3, 6, 8, and 9, characterized in that, Also includes: Server (15) and monitoring terminal (16); The control unit communicates with the monitoring terminal (16) through the server (15) and sends the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal (16).

11. The online monitoring device for leakage of the floating roof seal of the internal floating roof tank according to claim 4, characterized in that, A first filtration mechanism (11) and a second filtration mechanism (12) are respectively provided on the outside of the first sampling mechanism and the second sampling mechanism.

12. The online monitoring device for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 6 or 8, characterized in that, A first filtration mechanism (11) and a second filtration mechanism (12) are respectively provided on the outside of the first sampling mechanism and the second sampling mechanism.

13. A method for online monitoring of leakage in the floating roof seal of an internal floating roof tank, characterized in that, include: Obtain control commands; According to the control command, the first air extraction mechanism located at a first set distance above the floating roof inside the inner floating roof tank is controlled to perform air extraction, and the second air extraction mechanism located at a second set distance above the floating roof is controlled to perform air extraction. The online monitoring of the floating roof seal leakage of the internal floating roof tank is carried out based on the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the variable second extraction mechanism. This includes: fitting the oil and gas concentration corresponding to multiple variable preset second set distances to obtain the fitting equation for the corresponding equation, so as to construct the oil and gas concentration change rules corresponding to the variable second extraction mechanism, and carrying out online monitoring of the floating roof seal leakage of the internal floating roof tank.

14. The online monitoring method for leakage of the floating roof seal of an internal floating roof tank according to claim 13, characterized in that, Also includes: Determine the oil and gas leakage rate of the floating roof; Determining the oil and gas leakage rate of the floating roof includes: Obtain the first and second partial pressure values ​​corresponding to the first sampling hole of the first suction mechanism and the second sampling hole of the second suction mechanism, as well as the distance between the first and second sampling holes; The mass flux density per unit time is determined based on the first partial pressure value, the second partial pressure value, and the distance. The oil and gas leakage rate of the floating roof of the internal floating roof tank is determined based on the mass flux density and the inner radius of the internal floating roof tank.

15. The online monitoring method for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 13 or 14, characterized in that, The method for determining the rule corresponding to the change in oil and gas concentration for the modified second extraction mechanism includes: The current position of the second suction mechanism is determined, and the movement direction of the second suction mechanism is determined based on the current position and multiple variable preset second distances; the movement of the second suction mechanism is controlled according to the movement direction; when the second suction mechanism reaches the preset second distance, the movement of the second suction mechanism is stopped, and the second suction mechanism performs suction. Based on the oil and gas concentrations corresponding to the multiple varying preset second set distances, a rule for the variation of oil and gas concentrations corresponding to the varying second extraction mechanism is constructed, including: fitting the oil and gas concentrations corresponding to the multiple varying preset second set distances to obtain a fitting equation for the equation, so as to construct the rule for the variation of oil and gas concentrations corresponding to the varying second extraction mechanism.

16. The online monitoring method for leakage of the floating roof seal of an internal floating roof tank according to any one of claims 13 or 14, characterized in that, Also includes: Establish a connection between the control unit and the server; wherein, the control unit is used to perform online monitoring of the floating roof seal leakage of the internal floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism; The control unit communicates with the monitoring terminal through the server and sends the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal.

17. The online monitoring method for leakage of the floating roof seal of an internal floating roof tank according to claim 15, characterized in that, Also includes: Establish a connection between the control unit and the server; wherein, the control unit is used to perform online monitoring of the floating roof seal leakage of the internal floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism; The control unit communicates with the monitoring terminal through the server and sends the results of online monitoring of the floating roof seal leakage of the internal floating roof tank to the monitoring terminal.

18. An online monitoring device for leakage of the floating roof seal of an internal floating roof tank, characterized in that, include: The acquisition unit is used to acquire control commands; The control unit is configured to, according to the control command, control a first air extraction mechanism located at a first predetermined distance above the floating roof inside the inner floating roof tank to perform air extraction, and / or a second air extraction mechanism located at a second predetermined distance above the floating roof to perform air extraction. The monitoring unit is used to perform online monitoring of the floating roof seal leakage of the internal floating roof tank according to the oil and gas concentration of the first extraction mechanism and the oil and gas concentration change rules corresponding to the changing second extraction mechanism. The monitoring unit includes: fitting the oil and gas concentration corresponding to multiple changing preset second set distances to obtain the fitting equation of the set distance, so as to construct the oil and gas concentration change rules corresponding to the changing second extraction mechanism and perform online monitoring of the floating roof seal leakage of the internal floating roof tank.

19. An electronic device, characterized in that, include: processor; A memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to perform the method of any one of claims 13 to 17.

20. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the computer program instructions are executed by the processor, they implement the method described in any one of claims 13 to 17.

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