LNG (Liquefied Natural Gas) conveying and transferring device test monitoring method and system

Abstract

The invention discloses an LNG (Liquefied Natural Gas) conveying and transferring device test monitoring method and system. The method comprises the following steps of integration and test data acquisition, test monitoring task establishment, test monitoring task starting, test monitoring task execution, test monitoring task ending, test result query and data statistical analysis visualization. The system comprises a data processing module, a test task management module, a test data visualization module, a video monitoring module and a billboard module, wherein the data processing module is in integrated communication with various data acquisition terminals of the video monitoring and LNG conveying and transferring device; the system has test data and process picture acquisition and storage functions and test task management and control and result analysis functions. The system can continuously monitor the test process on line, comprehensively record the test data, support threshold alarm and remotely check the test site condition, and provide powerful support for the development and function improvement of the LNG conveying and transferring device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of offshore LNG equipment industry chain innovation engineering technology, and particularly relates to a LNG delivery and transfer device test monitoring method and system. BACKGROUND

[0002] Pipeline and LNG ocean transportation are the main ways of current imported natural gas, compared with pipeline import, LNG is imported from the sea through the receiving station, which is more flexible and can meet the rapid demand growth. The LNG delivery and transfer system is a kind of liquid cargo delivery system to ensure the safe delivery and transfer of LNG between ships and stations, and the function and operation stability and safety of the system must be ensured. Therefore, sufficient tests must be carried out before the LNG delivery and transfer system is developed and put into use. At present, the LNG delivery and transfer device test monitoring is mainly manual, which has the problems of discontinuous monitoring, incomplete monitoring angle, chaotic test data recording, and complex data analysis due to various test tasks and data. Therefore, a LNG delivery and transfer device test monitoring method and system is developed to ensure that the test process is monitored without omission and the data recording is not lost, and to provide auxiliary support for the function improvement and safety and reliability of the LNG delivery and transfer device. SUMMARY

[0003] In view of the phenomenon that the LNG delivery and transfer device test monitoring is mainly manual supervision and manual data recording, a LNG delivery and transfer device test monitoring method and system is designed to realize continuous and uninterrupted all-around monitoring of the test process, test information display analysis and recording, and guide the correction or improvement of the whole system.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A LNG delivery and transfer device test monitoring method, characterized in that the method comprises the following specific steps,

[0006] (1) integration and test data acquisition

[0007] A test bench, a liquid device for simulating LNG liquid and a remote control room are arranged, the test bench is provided with two, one of which is a fixed test bench for simulating the shore end LNG receiving device, and the other is a mobile lifting test bench for simulating the offshore LNG ship, the LNG delivery and transfer device with key components is arranged on the two test benches, the LNG delivery and transfer device is communicated with the liquid device, and the corresponding data acquisition terminal is arranged on the key components of the LNG delivery and transfer device, the data acquisition terminal realizes data acquisition through PLC, acquisition card or gateway and the remote control room, and the monitoring camera is arranged around the two test benches, the monitoring camera realizes monitoring data acquisition through network transmission and SDK API interface and the remote control room.

[0008] (2) Test monitoring task establishment

[0009] The test task is established and parameters are set in the remote control room, test name is filled in, plan start time is configured, plan end time is configured, test type is configured, test parameters are configured, monitoring threshold is configured, test personnel and resource allocation are configured, project state is set, test project number is automatically generated, test task types include low-temperature separation test, sea state simulation test, envelope range test, and anti-falling test, project states include to be started, in execution, and ended, and the resource allocation refers to allocation of the test bench, LNG delivery and transfer device, and liquid device;

[0010] (3) Test monitoring task start

[0011] The mobile lifting test bench and the LNG delivery and transfer device are powered on, the project state of the corresponding test task established in step (2) is started, the system automatically records the actual start time of the test, and receives various test data of various data acquisition terminals on site;

[0012] (4) Test monitoring task execution

[0013] When the test data is received, the project state is automatically changed to “in execution”, the on-site monitoring screen and various test data are displayed in real time during the test, and an alarm prompt is issued when the experimental result exceeds the threshold; if the user has a remote detailed observation demand, the monitoring screen and the monitoring angle are adjusted; based on the received data, the test data statistical analysis is automatically completed by using the built-in data analysis method, and the test related information is displayed and updated in real time by the board module;

[0014] (5) Test monitoring task end

[0015] When the LNG delivery and transfer device on site is powered off or no test data is received within the set time interval, the project state is automatically changed to “ended”, the actual end time of the test is automatically recorded, and the test personnel and the test bench, the test liquid device and other resources are released;

[0016] (6) Test result query and data statistical analysis visualization

[0017] After the test, test task historical data query and data statistical analysis are performed according to test time, test type, and LNG delivery and transfer device component ID dimensions, so as to realize test situation review or equipment development improvement guidance.

[0018] The technical problem solved by the present application can also be realized by the following technical scheme, wherein the monitoring threshold type in the monitoring threshold configuration of step (2) comprises platform stress overrun alarm, dynamic test bench motion position limit alarm, hose straightening alarm and pressure alarm.

[0019] The technical problem solved by the present application can also be realized by the following technical scheme, wherein the data in the data statistical analysis of step (6) comprises total success rate, test frequency, test failure frequency and failure type statistics of each test of the same product, 6-degree-of-freedom motion amplitude statistics and motion cycle statistics during dynamic testing.

[0020] The technical problem solved by the present application can also be realized by the following technical scheme, wherein the test monitoring system of the LNG delivery and transfer device comprises the following modules: a data processing module, a test task management module, a test data visualization module, a video monitoring module and a board module.

[0021] The data processing module: based on Modbus protocol and API interface, the monitoring picture, test digital quantity and analog quantity are collected and stored;

[0022] The test task management module: having test task establishment, editing, query, deletion, test actual execution and record functions;

[0023] The test data visualization module: based on test time, test type and LNG delivery and transfer device key component ID, the test data is statistically analyzed and displayed in the form of a chart;

[0024] The video monitoring module: having real-time recording, playback, monitoring picture and viewing angle adjustment functions of the test process;

[0025] The board module: the key information of the test process is visually displayed in the form of a large screen board, including test real-time picture, test real-time data and key analysis index chart display.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] Continuous online monitoring: the traditional monitoring and recording method in the development process of the LNG delivery and transfer device is mainly manual, which has defects such as limited monitoring time and incomplete recorded data. The present application integrates monitoring and test data collection terminal, which can continuously monitor the test process for 24 hours, display and record all test data in real time, remotely adjust the observation angle and distance, and provide strong support for the development and function improvement of the LNG delivery and transfer device.

[0028] Automatic fault alarm: the method can set threshold, fault type and fault reason, support automatic alarm above threshold and fault statistics, and assist test personnel and project managers to understand equipment status and clear improvement points.

[0029] The method and system realize continuous and uninterrupted overall monitoring of LNG delivery and transfer device test process, test information display analysis and recording, guide problem correction or development improvement of the whole system, and have wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A schematic diagram of the LNG delivery and transfer device test monitoring method;

[0031] Figure 2 A structural diagram of the LNG delivery and transfer device test monitoring method. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0033] REFERENCE Figure 1 A LNG delivery and transfer device test monitoring method, which mainly comprises the following steps:

[0034] (1) Integration and test data acquisition

[0035] A test bench, a liquid device for simulating LNG liquid and a remote control room are arranged, the test bench is located in an outdoor environment, is composed of a fixed test bench and a mobile lifting test bench, and simulates a shore LNG receiving device and a marine LNG ship respectively. The two test benches are connected by the LNG delivery and transfer device, and are used to carry out the LNG transfer process. Since LNG is flammable and explosive, low-temperature liquid nitrogen is used to simulate LNG in the liquid device during the test process.

[0036] The LNG delivery and transfer device is mainly composed of a quick connection and separation device, a saddle, a LNG hose, an emergency separation device, a fall arrest system and other important components, and is provided with a hydraulic system, a control cabinet and various acquisition terminals.

[0037] The fixed test bench is provided with a saddle (without a fall arrest system), a quick connection and separation device and a hose LNG receiving end; the mobile lifting test bench is provided with a saddle, an emergency separation device, a fall arrest system, an electro-hydraulic control system and a hose LNG output end, simulates the condition that a ship drifts away and floats, and verifies the emergency separation capability, the quick connection capability and the hose fall arrest and slow descent capability.

[0038] The arrangement of various types of collection terminals is as follows: the mobile test bench is configured with a pressure sensor and an electrical control cabinet, the open space within the activity range of the test bench is configured with a position sensor, the electrical control cabinet is deployed with a power switch, a circuit breaker, an ammeter, a pressure gauge, a test bench control PLC, a communication module and an interface; the LNG hose is configured with a wireless temperature sensor and a leakage transmitter; the fall arrest system is configured with a speed sensor and a position sensor; the emergency release device is provided with a pressure transmitter, a temperature sensor, a liquid nitrogen inlet and outlet control device, and a proximity switch; the hydraulic system is configured with a pressure sensor, a liquid level meter, a temperature sensor, an alarm device, and a leakage transmitter. The above various terminals are connected to the data processing module described below through switches, collection cards and the like, and record and transmit various test data such as temperature, pressure, leakage, position, speed, acceleration, liquid level, and on-off value.

[0039] Four sets of monitoring cameras are deployed around the test bench, connected to the data processing module described below based on network transmission and SDK API interface, and transmit monitoring data. The data flow is as shown in Figure 2

[0040] (2) Test monitoring task establishment

[0041] The test types mainly include low-temperature release test, simulated sea state test, fast connection device function test, and fall arrest test. The test task can be preset according to the test plan, or can be established simultaneously when the test is carried out. When the test task is established, the test type is set, the test name is filled in, the plan start time is configured, the plan end time is configured, the test type is configured, the test parameters are configured, the monitoring threshold is configured, the test personnel and resource allocation are set, the project state is set, and the test project number is automatically generated.

[0042] (3) Test monitoring task start

[0043] Start the mobile lifting test bench and the LNG delivery and transfer device, start the project state of the corresponding test task established in step (2), manually fill in the necessary test data, the system automatically records the actual start time of the test and receives various test data transmitted by the field hardware equipment. The test related data is shown in Table 1 below.

[0044] Table 1 LNG delivery and transfer device test monitoring data table

[0045]

[0046]

[0047] (4) Test monitoring task execution

[0048] ​When receiving the test data, the project status is automatically changed to “in execution”. The real-time on-site monitoring screen and various types of test data are displayed during the test; when the test result exceeds the threshold or a fault occurs, real-time alarm prompts are given. If the user has remote detailed observation needs, distance adjustment, detailed enlargement and reduction processing, monitoring angle adjustment, and monitoring screen switching of video monitoring content are supported. Based on the received data, the built-in data analysis algorithm is used to automatically complete the test data statistical analysis, and the board module displays and updates the test-related information in real time.

[0049] The monitoring threshold includes the following: platform stress overload alarm, threshold value for detecting that the platform stress load exceeds the design value during movement. Dynamic test movement position limit alarm, threshold value for triggering the limit switch in each direction. Hose straightening alarm, threshold value for detecting that the platform distance exceeds the hose length limit during movement. Pressure alarm, threshold value for detecting that the pressure in the pipeline system exceeds the set safety value.

[0050] The fault events include: emergency disengagement failure, critical component falling, air tightness test failure, and fault causes include: clamp failure to disengage, valve closing failure, medium leakage, medium critical component deformation, critical component abnormal sound, critical component damage, test pressure instability, temperature too high automatic protection, critical component migration failure, sealing element damage or aging, fastener loosening, test pipeline problem, and improper parameter setting.

[0051] The built-in data analysis method includes: basic statistical quantity calculation, the user can group the data according to the test conditions, test objects, etc., and quickly calculate the average, median, mode, standard deviation, variance, maximum value, minimum value, etc. Basic statistical quantities help users understand the central tendency and dispersion of data, and analyze the differences and rules between different groups; data distribution analysis, drawing frequency distribution histogram, box plot, etc. The distribution of data is intuitively displayed to help users find abnormal values and patterns in data distribution; a variety of graphical functions are provided, including line charts, bar charts, pie charts, scatter plots, etc. The user can choose the appropriate graph for data visualization display according to the characteristics of the data and the analysis needs.

[0052] (5) Test monitoring task ends

[0053] When the on-site test equipment and required resources are shut down or no test data is received within the set time interval, the project status is automatically changed to “ended”, the actual test end time is automatically recorded, the test report is generated based on the built-in report template, and the test personnel and test table, test liquid device, etc. Resources are released.

[0054] (6) Test result query and data statistical analysis visualization

[0055] After the test is completed, the test task history data can be queried, data statistical analysis can be viewed according to the test time, the test type, the LNG delivery and transfer device key part ID dimension, so as to realize the test situation review or guide the equipment development improvement.

[0056] With reference to Figure 2 The LNG delivery and transfer device test monitoring system provided by the application is provided with a remote central control room, the remote central control room comprises a data processing module, a test task management module, a test data visualization module, a video monitoring module and a look board module. The data processing module collects and stores the monitoring pictures, test digital quantities and analog quantities based on the Modbus protocol, API interface and the like. The test task management module has the functions of test task establishment, editing, query, deletion, test actual execution and record. The test data visualization module performs test data statistical analysis and display in the form of charts based on three dimensions of test time, test type and LNG delivery and transfer device key part ID. The video monitoring module has the functions of real-time recording, playback, monitoring picture and perspective adjustment of the test process. The look board module displays the key information of the test process in the form of a large screen look board, including real-time picture, real-time data and chart display of key analysis indexes. The data processing module connects the bottom layer of various data collection terminals and collects and stores the temperature, pressure, load, switch quantity and the like of various control terminals, and then sends them to the test task management module; the test task management module reads the test data in real time after the test task is started, associates them with the test monitoring task information (including test type, test actual start time, test actual end time, threshold, test data record table and the like), and sends the required statistical report, video stream and the like to the test data visualization module, the video monitoring module and the look board module based on the event-driven mechanism and the communication interface. The data of the test data visualization module, the video monitoring module and the look board module are mainly used for display and user interaction.

[0057] Through the above specific embodiments, the application can effectively realize the continuous monitoring and statistical analysis of the LNG delivery and transfer device test debugging process, and provide strong support for the development and improvement of the LNG delivery and transfer device.

Claims

1. A test monitoring method for LNG transportation and transfer equipment, characterized in that: The method comprises the following specific steps: (1) Integration and test data collection Arrange a test bench, a liquid device for simulating LNG liquid, and a remote control room. There are two test benches, one of which is a fixed test bench for simulating a shore-side LNG receiving device, and the other is a mobile lifting test bench for simulating an offshore LNG ship. Both test benches are equipped with LNG transportation and transfer devices with key components. The LNG transportation and transfer devices are connected to the liquid device, and corresponding data acquisition terminals are deployed on the key components of the LNG transportation and transfer devices. The above-mentioned data acquisition terminals realize data acquisition with the remote control room through PLC, acquisition card or gateway; and surveillance cameras are deployed around both test benches. The surveillance cameras realize monitoring data acquisition with the remote control room through network cable transmission and SDK API interface; (2) Establishment of test monitoring tasks Establish a test task and set parameters in the remote control room, including filling in the test name, configuring the planned start time, planned end time, test type, test parameters, monitoring thresholds, test personnel and resource allocation, and project status. The test project number is automatically generated. Test task types include low-temperature separation test, sea condition simulation test, envelope range test, and fall prevention test; project status includes waiting to start, executing, and completed. (3) Start of the test monitoring task Turn on the mobile lifting test bench and the LNG transportation and transfer device, start the project status of the corresponding test task established in step (2), and the system automatically records the actual start time of the test and receives various test data from various data acquisition terminals on site; (4) Execution of test monitoring tasks When test data is received, the project status automatically changes to "Executing." During the test, on-site monitoring images and various types of test data are displayed in real time. Alarms are issued when test results exceed thresholds. If the user requires remote detailed observation, the monitoring image and angle can be adjusted. Based on the received data, built-in data analysis methods are used to automatically perform statistical analysis of test data. The dashboard module displays and updates test-related information in real time. (5) The test monitoring task is completed When the on-site LNG transmission and transfer equipment is shut down or no test data is received within the set time interval, the project status automatically changes to "Ended" and the actual end time of the test is automatically recorded, freeing up test personnel, test bench, and liquid equipment resources. (6) Test result query and data statistical analysis visualization After the test, historical data query and data statistical analysis of the test tasks will be carried out according to the test time, test type, and ID of each key component of the LNG transportation and transfer device to review the test situation or guide equipment development and improvement.

2. The LNG transportation and transfer device test monitoring method according to claim 1 is characterized in that: In the monitoring threshold configuration described in step (2), the monitoring threshold types include platform force over-limit alarm, dynamic test bench motion position limit alarm, hose straightening alarm, and pressure alarm.

3. The LNG transportation and transfer device test monitoring method according to claim 1, characterized in that: The data in the data statistical analysis described in step (6) include the total success rate of each test of the same product, the number of tests, the number of failures in each test and the failure type statistics, the 6-DOF motion amplitude statistics during dynamic testing, and the motion cycle statistics.

4. A system for implementing the LNG transportation and transfer device test monitoring method according to any one of claims 1 to 3, characterized in that: The system is equipped with a remote control room, which includes a data processing module, a test task management module, a test data visualization module, a video monitoring module, and a dashboard module. The data processing module, the test data visualization module, the video monitoring module, and the dashboard module are all connected to the test task management module. The various data acquisition terminals on the LNG transportation and transfer device are all connected to the data processing module. Data processing module: Based on Modbus protocol and API interface, it collects and stores monitoring images, test digital quantities and analog quantities; Test task management module: with the functions of test task creation, editing, query, deletion, actual execution and recording; Test data visualization module: Statistical analysis and display of test data in the form of charts based on three dimensions: test time, test type, and ID of key components of the LNG transportation and transfer equipment; Video monitoring module: with real-time recording, playback, monitoring screen and viewing angle adjustment functions of the test process; Dashboard module: Visually display key information of the test process in the form of a large-screen dashboard, including real-time test images, real-time test data, and graphical display of key analysis indicators.

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