Method, device and equipment for determining remaining loading and unloading time of chemical tanker

Abstract

The present disclosure provides a method, apparatus, and device for determining the remaining loading and unloading duration of a chemical tanker, belonging to the technical field of intelligent ships. The determination method includes: obtaining the loading and unloading data of the chemical tanker, where the loading and unloading data includes the historical single-tank loading and unloading rate and the historical total loading and unloading rate; determining the single-tank loading and unloading rate of each cargo tank of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker; determining the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate; correcting the total loading and unloading rate according to the historical total loading and unloading rate to obtain a corrected total loading and unloading rate; and determining the remaining loading and unloading duration of the chemical tanker according to the corrected total loading and unloading rate. Through the determination method of the present disclosure, the accuracy of the remaining loading and unloading duration corresponding to the chemical tanker when loading and unloading goods can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent ships, and in particular to a method, device and equipment for determining the remaining loading and unloading time of a chemical tanker. Background Art

[0002] Chemical tankers, also known as liquid cargo ships, are used to carry various toxic, flammable, volatile or corrosive chemicals. Chemical tankers have multiple independent cargo holds. During loading, chemical tankers need to discharge ballast water to load goods into each independent cargo hold, and during unloading, ballast water needs to be pressurized into the ballast tank. This makes the remaining loading and unloading time directly related to the speed of loading and unloading of the ship and the control of the timing of seawater pressure discharge. Therefore, it is necessary to determine the remaining loading and unloading time of chemical tankers.

[0003] In the related art, the remaining time for loading and unloading of chemical tankers relies solely on operators' experience in estimating the loading and unloading rates of each independent cargo hold, and then estimating the total loading and unloading rate of all cargo holds on this basis. Finally, the remaining cargo volume is divided by the total loading and unloading rate to simply estimate the remaining time for loading and unloading.

[0004] However, since the loading and unloading rate of the chemical tanker will change with the pipeline pressure and the ship's posture during loading and unloading, the loading and unloading rate obtained by the above method has a large error, which leads to inaccurate remaining loading and unloading time. Summary of the invention

[0005] The embodiment of the present disclosure provides a method for determining the remaining loading and unloading time of a chemical tanker, which can improve the accuracy of the remaining loading and unloading time corresponding to the loading and unloading of goods by the chemical tanker. The technical solution is as follows:

[0006] An embodiment of the present disclosure provides a method for determining the remaining loading and unloading time of a chemical tanker, the determination method comprising: acquiring loading and unloading data of the chemical tanker, the loading and unloading data comprising a historical single-tank loading and unloading rate and a historical total loading and unloading rate; determining the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker; determining the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate; correcting the total loading and unloading rate according to the historical total loading and unloading rate to obtain a corrected total loading and unloading rate; and determining the remaining loading and unloading time of the chemical tanker according to the corrected total loading and unloading rate.

[0007] In another implementation of the present disclosure, the single-hold loading and unloading rate of each cargo hold of the chemical tanker is determined according to the historical single-hold loading and unloading rate and the loading and unloading stage of the chemical tanker, including: if the loading and unloading stage of the cargo hold is a low-speed loading and unloading stage, the single-hold loading and unloading rate is determined according to the historical single-hold loading and unloading rate; or, if the loading and unloading stage of the cargo hold is a high-speed loading and unloading stage, the single-hold loading and unloading rate is determined according to the change in the liquid level height of the cargo hold and the historical single-hold loading and unloading rate.

[0008] In another implementation of the present disclosure, if the loading and unloading stage of the cargo hold is a high-speed loading and unloading stage, the single-hold loading and unloading rate is determined according to the change in the liquid level height of the cargo hold and the historical single-hold loading and unloading rate, including: calculating the actual loading and unloading rate of the single hold according to the rate of change of the liquid level height of the cargo hold; and correcting the actual loading and unloading rate of the single hold by using the historical single-hold loading and unloading rate to obtain the single-hold loading and unloading rate.

[0009] In another implementation of the present disclosure, the historical single-chamber loading and unloading rate includes a historical single-chamber average rate and a historical single-chamber high-speed loading and unloading rate; the single-chamber actual loading and unloading rate is corrected by the historical single-chamber loading and unloading rate to obtain the single-chamber loading and unloading rate, including: performing linear fitting between the historical single-chamber average rate and the historical single-chamber high-speed loading and unloading rate to obtain a first linear equation; and obtaining the single-chamber loading and unloading rate according to the first linear equation and the single-chamber actual loading and unloading rate.

[0010] In yet another implementation of the present disclosure, determining the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rates includes: taking the sum of the single-tank loading and unloading rates as the total loading and unloading rate of the chemical tanker.

[0011] In another implementation of the present disclosure, the historical total loading and unloading rate includes a historical total average rate and a historical total high-speed loading and unloading rate; the total loading and unloading rate is corrected according to the historical total loading and unloading rate to obtain a corrected total loading and unloading rate, including: performing linear fitting between the historical total average rate and the historical total high-speed loading and unloading rate to obtain a second linear equation; and obtaining the corrected total loading and unloading rate according to the second linear equation and the total loading and unloading rate.

[0012] In another implementation of the present disclosure, the method further includes: determining the loading and unloading stage of the cargo hold in accordance with at least one of the following methods: if the liquid level height of the container for receiving the goods is not greater than 0.3m, the loading and unloading stage of the cargo hold is a low-speed loading and unloading stage; if the liquid level height of the container for receiving the goods is greater than 0.3m, the loading and unloading stage of the cargo hold is a high-speed loading and unloading stage; wherein, the container in the loading stage is a cargo hold, and the container in the unloading stage is a shore tank connected to the cargo hold of the chemical tanker.

[0013] In another implementation of the present disclosure, a device for determining the remaining time of real-time loading and unloading of a chemical tanker is also provided. The determination device is based on the above determination method, and the determination device includes: a loading and unloading data acquisition module, used to acquire the loading and unloading data of the chemical tanker, the loading and unloading data including a historical single-tank loading and unloading rate and a historical total loading and unloading rate; a single-tank loading and unloading rate determination module, used to determine the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker; a total loading and unloading rate determination module, used to determine the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate; a corrected total loading and unloading rate determination module, which corrects the total loading and unloading rate according to the historical total loading and unloading rate to obtain a corrected total loading and unloading rate; and a remaining loading and unloading time determination module, which determines the remaining loading and unloading time of the chemical tanker according to the corrected total loading and unloading rate.

[0014] In another implementation of the present disclosure, a computer device is also provided, which includes a processor and a memory configured to store executable instructions of the processor; the processor is configured to execute the method for determining the remaining loading and unloading time of the chemical tanker as described above.

[0015] In yet another implementation of the present disclosure, a computer storage medium is provided on which computer instructions are stored. When the computer instructions are executed by a processor, the method for determining the remaining loading and unloading time of a chemical tanker described above is implemented.

[0016] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0017] When determining the remaining loading and unloading time of a chemical tanker through the determination method provided by the embodiment of the present invention, since the determination method is to obtain the loading and unloading data of the chemical tanker and the loading and unloading stages of the chemical tanker, and then determine the single-tank loading and unloading rate based on the loading and unloading data and the loading and unloading stages, and then obtain the total loading and unloading rate of the chemical tanker based on the single-tank loading and unloading rate, and correct the total loading and unloading rate, the final total loading and unloading rate can be made more accurate, so as to improve the accuracy of the remaining loading and unloading time of the chemical tanker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1It is a flowchart of the loading and unloading process of a chemical tanker provided by an embodiment of the present disclosure;

[0020] Figure 2 It is a flowchart of a method for determining the remaining loading and unloading duration of a chemical tanker provided by an embodiment of the present disclosure;

[0021] Figure 3 It is a flowchart of a method for determining the remaining loading and unloading duration of a chemical tanker provided by an embodiment of the present disclosure;

[0022] Figure 4 It is a schematic diagram of modules of a device for determining the remaining loading and unloading duration of a chemical tanker provided by an embodiment of the present disclosure;

[0023] Figure 5 It is a schematic diagram of the structure of a computer device provided by an embodiment of the present disclosure. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0025] To clearly illustrate the method for determining the remaining loading and unloading duration provided by the embodiments of the present disclosure, the loading and unloading process of the chemical tanker will be described first here.

[0026] The loading and unloading process of the chemical tanker includes a loading process and an unloading process. The loading process of the chemical tanker refers to the transfer of chemicals from the shore tank to the cargo hold of the chemical tanker through the liquid cargo injection pipe. The unloading process of the chemical tanker refers to the pumping of chemicals from the cargo hold to the shore tank through the cargo pump.

[0027] During loading, one end of the liquid cargo injection pipe is connected to the cargo hold, and the other end is connected to the shore tank. During unloading, one end of the liquid cargo injection pipe is connected to the outlet valve of the cargo pump, and the other end is connected to the shore tank.

[0028] During actual loading and unloading, the opening of the cargo hold is carried out in batches, and at most 4 cargo holds are connected to the shore tank simultaneously in each batch.

[0029] As Figure 1 shown, when the chemical tanker is loading, it generally includes the following processes:

[0030] First, the preparation process, that is, the empty cargo hold of the chemical tanker arrives at the port and is ready.

[0031] Then, the first cargo hold is loaded at a low speed. Loading the first cargo hold at a low speed means that when loading an empty cargo hold, in order to prevent the velocity of the chemical (medium) rushing out of the nozzle of the liquid cargo injection pipe in the cargo hold from being too large and generating static electricity when the liquid level in the cargo hold is too low, it is necessary to load at a low speed until the liquid level in the cargo hold is higher than the nozzle of the liquid cargo injection pipe.

[0032] Next, sampling and waiting are carried out. During sampling, the pump equipment in the pump house on shore is usually shut down. At this time, no liquid cargo flows into the cargo holds in the chemical tanker, and waiting is required. The number of sampling times for each loading is related to the requirements of the cargo owner.

[0033] Then, high-speed loading is carried out. High-speed loading refers to the process of continuous rapid loading before a single cargo hold is filled. When approaching full (generally when the liquid level height reaches more than 90% of the height of the cargo hold), deceleration is required, and at the same time, the next cargo hold is opened to start low-speed loading.

[0034] Then, waiting in the middle. Waiting in the middle refers to the process of continuing to load the ship when the shore tank is emptied and the shore tank needs to be replaced. This process may take a long time.

[0035] Then, when the last hold is filled. When other cargo holds are already filled, after the last cargo hold is almost filled, the flow rate needs to be carefully controlled for low-speed loading to avoid overflow.

[0036] Finally, pipeline purging and finishing. Finishing refers to the process of disconnecting the pipeline from the shore tank on the chemical tanker, purging the pipeline, and retracting the hose, etc.

[0037] The unloading operation process is similar to loading and will not be elaborated here. It is just that the last process is tank cleaning and finishing. The so-called tank cleaning is to replace the output pipe with a smaller diameter and connect it to the cargo pump to transport the remaining medium in the cargo hold to the shore tank.

[0038] The difference in the loading and unloading time of the chemical tanker each time mainly comes from the differences in the loading and unloading rates of goods with different viscosities and densities, the characteristics of equipment such as pipelines and shore tanks at different terminals, and the differences in personnel work efficiency.

[0039] It should be noted that even if the number of cargo holds for loading and unloading in each batch is different, however, since the cargo holds for loading and unloading are connected to the injection pipes of the shore tank at the same time, limited by conditions such as the diameter of the injection pipes of the shore tank and the power parameters of the pump equipment in the pump house, etc., the flow rate into the shore tank is basically the same, that is, the number of cargo holds used for loading and unloading in each batch does not affect the total loading and unloading rate.

[0040] The embodiments of the present disclosure provide a method for determining the remaining loading and unloading time of a chemical tanker, as Figure 2 shown. The determination method includes:

[0041] S201: Obtain the loading and unloading data of the chemical tanker. The loading and unloading data includes the historical single-hold loading and unloading rate and the historical total loading and unloading rate.

[0042] The historical single-hold loading and unloading rate refers to the rate used when loading and unloading the same chemical in this cargo hold before, including the historical single-hold average rate and the historical single-hold high-speed loading rate corresponding to the cargo hold during the high-speed loading stage.

[0043] The historical single-hold average rate is obtained by dividing the cargo volume of the cargo hold loaded and unloaded by the cargo hold loading and unloading time.

[0044] The historical total loading and unloading rate refers to the rate used by the chemical tanker in previous loading and unloading of the same chemicals, including the historical total high-speed loading and unloading rate and the historical total average rate corresponding to the cargo hold entering the high-speed loading and unloading stage.

[0045] The historical average rate is calculated by dividing the volume of chemicals loaded and unloaded by the total loading and unloading time.

[0046] S202: Determine the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker.

[0047] According to the previous description, the corresponding loading and unloading rates of the cargo hold are different when they are in different loading and unloading stages, so it is necessary to determine the loading and unloading stage of the chemical tanker in order to improve the accuracy of the single-hold loading and unloading rate of each cargo hold.

[0048] S203: Determine the total loading and unloading rate of the chemical tanker according to the loading and unloading rate of the single tank.

[0049] Since each batch of cargo holds is loaded simultaneously when a chemical tanker is loading, the total loading and unloading rate of the chemical tanker can be obtained by determining the loading and unloading rate of each single hold.

[0050] S204: Correcting the total loading and unloading rate according to the historical total loading and unloading rate to obtain a corrected total loading and unloading rate.

[0051] The actual total loading and unloading rate can be corrected by the historical total loading and unloading rate, so that the total loading and unloading rate can be more consistent with the actual loading and unloading conditions according to the actual situation, thereby making the subsequent estimation of the remaining loading and unloading time more accurate.

[0052] S205: Determine the remaining loading and unloading time of the chemical tanker according to the corrected total loading and unloading rate.

[0053] When determining the remaining loading and unloading time of a chemical tanker through the determination method provided by the embodiment of the present invention, since the determination method is to obtain the loading and unloading data of the chemical tanker and the loading and unloading stages of the chemical tanker, and then determine the single-tank loading and unloading rate based on the loading and unloading data and the loading and unloading stages, and then obtain the total loading and unloading rate of the chemical tanker based on the single-tank loading and unloading rate, and correct the total loading and unloading rate, the final total loading and unloading rate can be made more accurate, so as to improve the accuracy of the remaining loading and unloading time of the chemical tanker.

[0054] Figure 3 Another method for determining the remaining loading and unloading time of a chemical tanker provided by the embodiment of the present disclosure is combined with Figure 3, the determination method includes:

[0055] S301: Obtain loading and unloading data of a chemical tanker, the loading and unloading data including historical single-tank loading and unloading rates and historical total loading and unloading rates.

[0056] In this embodiment, the loading and unloading data of the chemical tanker is obtained by monitoring the action signals of the relevant equipment of the chemical tanker and the liquid level in the cargo hold of the chemical tanker.

[0057] Specifically, we can obtain the loading time of a single tank (including the time used for loading, and other auxiliary time during loading and unloading, such as connecting pipelines, changing shore tanks, etc.) and the unloading time (including the time used for unloading, and other auxiliary time during unloading, such as connecting pipelines, changing shore tanks, etc.).

[0058] Then, based on the monitoring time and the cargo volume in the cargo hold, the historical single-hold average rate and the historical total average rate can be obtained.

[0059] The historical single-tank high-speed loading and unloading rate can be calculated and determined during actual loading and unloading. The historical total high-speed loading and unloading rate is the sum of multiple historical single-tank high-speed loading and unloading rates.

[0060] In addition, when obtaining loading and unloading data, it is also necessary to obtain the cargo information of the cargo to be loaded and unloaded. The cargo information includes the cargo name, cargo quantity, etc. The cargo information of the cargo to be loaded and unloaded comes from the ship's transportation mission and is recorded by the operator.

[0061] By obtaining cargo information, it is compared with the chemicals previously loaded in the cargo hold to obtain the corresponding loading and unloading data when loading the same chemicals.

[0062] In this embodiment, the loading and unloading data is obtained from the database in the host computer. The data stored in the database includes the historical single-tank average rate and historical single-tank high-speed loading and unloading rate corresponding to each cargo hold, and also includes the historical total loading and unloading of chemical tankers. The cargo information in the loading and unloading data is directly entered into the host computer by the onboard operator.

[0063] S302: Determine the loading and unloading stage of the chemical tanker.

[0064] As introduced at the beginning of the article, in the initial stage of loading, the loading speed of chemical tankers needs to be limited to avoid splashing due to excessive speed and causing static electricity.

[0065] In actual use, since the nozzle of the injection pipe of the cargo hold is located at the bottom of the cargo hold, and the nozzle of the injection pipe of the shore tank is also located at the bottom of the shore tank. When the liquid level in the cargo hold or the liquid level in the shore tank is lower than the diameter of the nozzle of the injection pipe (generally 0.3m), the nozzles at both ends of the injection pipe are not immersed. When the loading and unloading rate is high, the flow rate of the liquid cargo is high, which will cause the liquid cargo to spray due to the increase in flow rate, thereby increasing the possibility of static electricity, and then air intake fire, etc. In other words, in order to improve safe operation and avoid the above phenomenon, it is necessary to limit the loading and unloading rate in the early stage of loading and unloading operations.

[0066] During the actual loading operation of chemical tankers, in order to avoid static electricity caused by excessive loading, the maximum loading and unloading rate of each cargo hold is required not to exceed 1m / s at the initial stage of loading.

[0067] That is, step 302 includes:

[0068] 3021: If the liquid level of the container receiving the goods is not greater than 0.3m, the loading and unloading stage of the cargo hold is the low-speed loading and unloading stage.

[0069] 3022: If the liquid level of the container receiving the goods is greater than 0.3m, the loading and unloading stage of the cargo hold is a high-speed loading and unloading stage;

[0070] The container during the loading phase is the cargo hold, and the container during the unloading phase is the shore tank connected to the cargo hold of the chemical tanker.

[0071] Of course, it is also possible to judge whether it is in the high-speed loading and unloading stage by the operation of the pump. For example, when a chemical tanker is in the unloading operation, when the pump speed reaches more than 60% and the pump outlet valve opening exceeds 30%, it is considered to have entered the high-speed loading and unloading stage.

[0072] S303: Determine the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker.

[0073] Step S303 includes:

[0074] 3031: If the cargo hold loading and unloading phase is a low-speed loading and unloading phase, the single-hold loading and unloading rate is determined based on the historical single-hold loading and unloading rate.

[0075] When the loading and unloading stage of the cargo hold is a low-speed loading and unloading stage, it means that the cargo hold is in the initial stage of loading and unloading. At this time, since the actual loading and unloading rate is too low, it cannot be used directly to calculate the total loading and unloading rate. This will make the total loading and unloading rate too low and the subsequent remaining loading and unloading time will have too large an error.

[0076] To improve the accuracy of the remaining loading and unloading duration, at this time, by referring to the historical single - hold loading and unloading rate (it has been described above that the historical single - hold loading and unloading rate includes the historical single - hold average rate and the historical single - hold high - speed loading and unloading rate), the historical single - hold average rate corresponding to the same chemical being loaded and unloaded in this cargo hold is selected as the single - hold loading and unloading rate of this cargo hold.

[0077] 3032: If the loading and unloading stage of the cargo hold is the high - speed loading and unloading stage, then determine the single - hold loading and unloading rate based on the change in the liquid level height of the cargo hold and the historical single - hold loading and unloading rate.

[0078] Step 3032 includes:

[0079] (1) Calculate the actual single - hold loading and unloading rate based on the change rate of the liquid level height of the cargo hold.

[0080] Exemplarily, the actual single - hold loading and unloading rate can be obtained in the following way:

[0081] 1.1, Record the liquid level height of the cargo hold at the same time intervals, and calculate the change rate of the liquid level height of the cargo hold.

[0082] 1.2, Calculate the change rate of the volume of the cargo hold based on the change rate of the liquid level height.

[0083] 1.3, Calculate the single - hold loading and unloading rate based on the change rate of the volume of the cargo hold.

[0084] In this embodiment, data is collected once every 8s, the change rate of the liquid level in the cargo hold is recorded continuously for 5 minutes, and then the change rate of the volume of the goods is calculated by interpolating the tank capacity table. The obtained change rate of the volume of the goods is actually the average value of the change rate of the volume after 5 minutes of normal unloading.

[0085] (2) Correct the actual single - hold loading and unloading rate to obtain the single - hold loading and unloading rate through the historical single - hold loading and unloading rate.

[0086] 2.1, Perform linear fitting between the historical single - hold average rate and the historical single - hold high - speed loading and unloading rate to obtain the first linear equation.

[0087] Among them, the first linear equation can be expressed in the form of y1 = a1x1 + b1, where x1 is the historical single - hold high - speed loading and unloading rate, y1 is the historical single - hold average rate, a1 is the slope of the first linear equation, and b1 is the intercept of the first linear equation.

[0088] 2.2, Obtain the single - hold loading and unloading rate based on the linear equation and the actual single - hold loading and unloading rate.

[0089] In this embodiment, the actual loading and unloading rate of a single cabin is substituted as x1 into the first linear equation, and the single cabin loading and unloading rate corresponding to the actual loading and unloading rate of the single cabin (that is, the average value of the single cabin loading and unloading rate corresponding to the actual loading and unloading rate of the single cabin) can be obtained, that is, the y1 value corresponding to x1, so as to prepare for estimating the duration.

[0090] S304: The sum of the loading and unloading rates of each single tank is taken as the total loading and unloading rate of the chemical tanker.

[0091] During actual loading and unloading, a ship usually has multiple cargo holds loading or unloading at the same time, so the total loading and unloading rate of the entire ship is calculated first, that is, all working cargo holds are calculated to obtain the total unloading rate.

[0092] In actual operation, it is possible to pre-judge whether the chemical tanker is in the process of loading or unloading. During loading, the number of inlet valves of the cargo hold that are opened at the same time is counted, and then the corresponding single-hold loading and unloading rates are added. During unloading, the number of cargo pumps that are started at the same time is counted, and then the corresponding single-hold loading and unloading rates are added.

[0093] S305: Correcting the total loading and unloading rate according to the historical total loading and unloading rate to obtain a corrected total loading and unloading rate.

[0094] Exemplarily, S305 includes:

[0095] 3051: Perform a linear fit between the historical total average rate and the historical total high-speed loading and unloading rate to obtain a second linear equation.

[0096] The second linear equation can be expressed in the form of y2=a2x2+b2, where x2 is the historical total high-speed loading and unloading rate, y2 is the historical total average rate, a2 is the slope of the second linear equation, and b2 is the intercept of the second linear equation.

[0097] 3052: According to the second linear equation and the total loading and unloading rate, a modified total loading and unloading rate is obtained.

[0098] The reason why the total loading and unloading rate needs to be corrected is that when the cargo hold is loading, the shore tank liquid level continues to decrease, that is, the shore output rate will continue to change. During the unloading operation, the shore tank liquid level is constantly increasing, and the back pressure of the unloading pipeline is also constantly increasing, so the loading and unloading rate must be changing. In addition, the actual flow rate is different due to the different losses of the liquid cargo to each cargo hold pipeline during loading, and the crew will open the next cargo hold to relay the loading when the cargo hold is slowing down. Therefore, the accuracy of calculating the remaining loading and unloading time based on the simple remaining cargo volume divided by the loading and unloading rate is bound to be low. Therefore, by correcting the total loading and unloading rate, the reliability of the remaining loading and unloading time can be greatly improved.

[0099] In this embodiment, by substituting the total loading and unloading rate as x2 into the second linear equation, the corrected total loading and unloading rate corresponding to this total loading and unloading rate (i.e., the total average loading and unloading rate corresponding to the total loading and unloading rate) can be obtained accordingly.

[0100] Since y2 in the second linear equation is the historical total average rate, that is, the average value of the loading and unloading speed of the chemical tanker, and this average value is the specific data obtained during the actual loading and unloading process, so this average value conforms to the actual loading and unloading process, that is, the actual situations such as the increase in pipeline back pressure during unloading and the replacement of shore tanks mentioned above are considered. When the total loading and unloading rate is substituted as x2 into the second linear equation, the historical total average rate corresponding to this total loading and unloading rate can be obtained accordingly, that is, the actual average rate of loading and unloading of the chemical tanker during this loading and unloading, which is also to correct this total loading and unloading rate.

[0101] In this embodiment, after the total loading and unloading rate is counted, the average value corresponding to this total loading and unloading rate, that is, the corrected total loading and unloading rate, can be obtained through the second linear equation.

[0102] S306: Determine the remaining loading and unloading duration of the chemical tanker according to the corrected total loading and unloading rate.

[0103] In this embodiment, by dividing the total remaining cargo volume by the corrected total loading and unloading rate, the remaining loading and unloading duration of the chemical tanker can be calculated.

[0104] During unloading, the total remaining cargo volume can be obtained by subtracting the discharged cargo volume from the total loading volume of the chemical. Or, during loading, the total remaining cargo volume is obtained by subtracting the discharged cargo volume from the total loading volume of the shore tank.

[0105] The discharged cargo volume can be calculated by recording the liquid level height of the cargo hold.

[0106] This embodiment of the present disclosure also provides a device for determining the real-time remaining loading and unloading duration of a chemical tanker, such as Figure 4As shown in the figure, the determination device determines based on the above-mentioned determination method. The determination device includes: a loading and unloading data acquisition module 401, a single-tank loading and unloading rate determination module 402, a total loading and unloading rate determination module 403, a corrected total loading and unloading rate determination module 404, and a remaining loading and unloading duration determination module 405. The loading and unloading data acquisition module 401 is used to acquire the loading and unloading data of the chemical tanker, and the loading and unloading data includes the historical single-tank loading and unloading rate and the historical total loading and unloading rate. The single-tank loading and unloading rate determination module 402 is used to determine the single-tank loading and unloading rate of each cargo tank of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker. The total loading and unloading rate determination module 403 is used to determine the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate. The corrected total loading and unloading rate determination module 404 corrects the total loading and unloading rate according to the historical total loading and unloading rate to obtain the corrected total loading and unloading rate. The remaining loading and unloading duration determination module 405 determines the remaining loading and unloading duration of the chemical tanker according to the corrected total loading and unloading rate.

[0107] The above determination device has all the beneficial effects of the above determination method, and will not be elaborated here.

[0108] Optionally, the single-tank loading and unloading rate determination module 402 is further used to, when the liquid level height of the container for receiving the goods is not greater than 0.3 m, the loading and unloading stage of the cargo tank is the low-speed loading and unloading stage; if the liquid level height of the container for receiving the goods is greater than 0.3 m, the loading and unloading stage of the cargo tank is the high-speed loading and unloading stage; wherein, the container in the loading stage is the cargo tank, and the container in the unloading stage is the shore tank connected to the cargo tank of the chemical tanker; or, if the chemical tanker is in the unloading operation, when the rotation speed of the cargo pump of the cargo tank reaches more than 60% and the opening of the outlet valve of the cargo pump exceeds 20%, the loading and unloading stage of the cargo tank is the high-speed loading and unloading stage.

[0109] Optionally, the single-tank loading and unloading rate determination module 402 is further used to, if the loading and unloading stage of the cargo tank is the low-speed loading and unloading stage, determine the single-tank loading and unloading rate according to the historical single-tank loading and unloading rate; or, if the loading and unloading stage of the cargo tank is the high-speed loading and unloading stage, determine the single-tank loading and unloading rate according to the change in the liquid level height of the cargo tank and the historical single-tank loading and unloading rate.

[0110] Optionally, the single-tank loading and unloading rate determination module 402 is further used to calculate the single-tank actual loading and unloading rate according to the change rate of the liquid level height of the cargo tank; and correct the single-tank actual loading and unloading rate through the historical single-tank loading and unloading rate to obtain the single-tank loading and unloading rate.

[0111] Optionally, the single-tank loading and unloading rate determination module 402 is further used to perform linear fitting between the historical single-tank average rate and the historical single-tank high-speed loading and unloading rate to obtain the first linear equation; and obtain the single-tank loading and unloading rate according to the first linear equation and the single-tank actual loading and unloading rate.

[0112] The total loading and unloading rate determination module 403 is further configured to take the sum of the loading and unloading rates of each single tank as the total loading and unloading rate of the chemical tanker.

[0113] Optionally, the modified total loading and unloading rate determination module 404 is further used to perform linear fitting between the historical total average rate and the historical total high-speed loading and unloading rate to obtain a second linear equation; and obtain the modified total loading and unloading rate based on the second linear equation and the total loading and unloading rate.

[0114] Figure 5 is a schematic diagram of a computer device provided by an embodiment of the present disclosure, combined with Figure 5 , the computer device 500 may include one or more of the following components: a processor 501 , a memory 502 , a communication interface 503 , and a bus 504 .

[0115] The processor 501 includes one or more processing cores, and the processor 501 executes various functional applications and information processing by running software programs and modules. The memory 502 and the communication interface 503 are connected to the processor 501 through the bus 504. The memory 502 can be used to store at least one instruction, and the processor 501 is used to execute the at least one instruction to implement each step in the above method.

[0116] In addition, the memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or an optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[0117] The embodiment of the present disclosure also provides a computer storage medium, and when the computer instructions are executed by a processor, the above method for determining the remaining loading and unloading time of a chemical tanker is implemented.

[0118] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for determining the remaining loading and unloading duration of a chemical tanker, characterized in that The determination method comprises: Obtaining loading and unloading data of chemical tankers, wherein the loading and unloading data includes historical single-tank loading and unloading rates and historical total loading and unloading rates; Determining the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker; Determining the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate; The total loading and unloading rate is corrected according to the historical total loading and unloading rate, the historical total loading and unloading rate includes the historical total average rate and the historical total high-speed loading and unloading rate, a linear fit is performed between the historical total average rate and the historical total high-speed loading and unloading rate to obtain a second linear equation, and a corrected total loading and unloading rate is obtained according to the second linear equation and the total loading and unloading rate; The remaining loading and unloading time of the chemical tanker is determined according to the corrected total loading and unloading rate.

2. The determination method according to claim 1, characterized in that The determining the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker comprises: If the loading and unloading stage of the cargo hold is a low-speed loading and unloading stage, the single-hold loading and unloading rate is determined according to the historical single-hold loading and unloading rate; or, If the loading and unloading stage of the cargo hold is a high-speed loading and unloading stage, the single-hold loading and unloading rate is determined according to the change in the liquid level height of the cargo hold and the historical single-hold loading and unloading rate.

3. The determination method according to claim 2, wherein If the cargo hold loading and unloading stage is a high-speed loading and unloading stage, determining the single-hold loading and unloading rate according to the change in the liquid level height of the cargo hold and the historical single-hold loading and unloading rate includes: The actual loading and unloading rate of the single hold is calculated according to the rate of change of the liquid level height of the cargo hold; The actual loading and unloading rate of the single cabin is corrected by the historical loading and unloading rate of the single cabin to obtain the loading and unloading rate of the single cabin.

4. The determination method according to claim 3, wherein The historical single-tank loading and unloading rate includes the historical single-tank average rate and the historical single-tank high-speed loading and unloading rate; The actual loading and unloading rate of the single cabin is corrected by using the historical loading and unloading rate of the single cabin to obtain the loading and unloading rate of the single cabin, including: Performing a linear fit between the historical single-cabin average rate and the historical single-cabin high-speed loading and unloading rate to obtain a first linear equation; The single-cabin loading and unloading rate is obtained according to the first linear equation and the actual loading and unloading rate of the single-cabin.

5. The determination method according to claim 1, wherein Determining the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate includes: The sum of the loading and unloading rates of each single tank is taken as the total loading and unloading rate of the chemical tanker.

6. The determination method according to any one of claims 1 to 5, characterized in that The method further comprises: Determine the loading and unloading phase of the cargo hold in accordance with at least one of the following methods: If the liquid level of the container receiving the goods is not greater than 0.3m, the loading and unloading stage of the cargo hold is a low-speed loading and unloading stage; If the liquid level of the container receiving the goods is greater than 0.3m, the loading and unloading stage of the cargo hold is a high-speed loading and unloading stage; The container in the loading stage is a cargo hold, and the container in the unloading stage is a shore tank connected to the cargo hold of the chemical tanker.

7. A determining device for the remaining duration of real-time loading and unloading of a chemical tanker, wherein the determining device is based on the determining method according to any one of claims 1 to 6, characterized in that The determining device comprises: A loading and unloading data acquisition module, used to acquire the loading and unloading data of the chemical tanker, wherein the loading and unloading data includes a historical single-tank loading and unloading rate and a historical total loading and unloading rate; A single-tank loading and unloading rate determination module, used to determine the single-tank loading and unloading rate of each cargo hold of the chemical tanker according to the historical single-tank loading and unloading rate and the loading and unloading stage of the chemical tanker; A total loading and unloading rate determination module, used to determine the total loading and unloading rate of the chemical tanker according to the single-tank loading and unloading rate; a modified total loading and unloading rate determination module, configured to modify the total loading and unloading rate according to the historical total loading and unloading rate, wherein the historical total loading and unloading rate includes the historical total average rate and the historical total high-speed loading and unloading rate, linearly fit the historical total average rate and the historical total high-speed loading and unloading rate to obtain a second linear equation, and obtain a modified total loading and unloading rate according to the second linear equation and the total loading and unloading rate; The remaining loading and unloading time determination module is used to determine the remaining loading and unloading time of the chemical tanker according to the modified total loading and unloading rate.

8. A computer device, characterized in that, The computer device includes a processor and a memory configured to store instructions executable by the processor; the processor is configured to execute the method for determining the remaining loading and unloading time of a chemical tanker according to any one of claims 1 to 6.

9. A computer storage medium, on which computer instructions are stored, characterized in that, When the computer instructions are executed by a processor, the method for determining the remaining loading and unloading time of a chemical tanker according to any one of claims 1 to 6 is implemented.

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