Liquid level acquisition method and device of vertical oil tank and liquid level early warning system for oil receiving and transmitting

[0045] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.

[0046] The method for obtaining the liquid level of a vertical oil tank provided by the present invention can be applied to figure 1 Among the application scenarios shown, figure 1 This is a schematic diagram of an application scenario of the method for acquiring the liquid level of a vertical oil tank in an embodiment. In this application scenario, the user can monitor the liquid level of the vertical oil tank 100 in real time through the monitoring terminal 200 in the monitoring room. It communicates with the level gauge 300 provided on the vertical oil tank 100, and obtains the real-time liquid level of the vertical oil tank 100 collected by the level gauge 300. For example, the vertical oil tank 100 is The liquid level in the medium drops from liquid level A to liquid level B or rises from liquid level B to liquid level A. When the user monitors through the monitoring terminal 200 that the liquid level reaches the pre-warning value, the user can correlate the liquid level of the vertical oil tank Early warning processing to prevent accidents caused by tank tapping when the liquid level exceeds the upper limit or the pump empties when the liquid level is too low. When receiving and dispatching oil in the oil tank, it is often necessary to pre-estimate the liquid level when the receiving and sending is completed. The liquid level acquisition method of the type oil tank can accurately acquire the liquid level value after receiving and dispatching oil. Wherein, the monitoring terminal 200 can be implemented by a personal computer or an independent server or a server cluster composed of multiple servers.

[0047] In one embodiment, a method for obtaining the liquid level of a vertical oil tank is provided. figure 2 , figure 2 It is a schematic flow chart of a method for obtaining a liquid level of a vertical oil tank in an embodiment, and the method can be applied to figure 1 The monitoring terminal 200 in FIG. 1 obtains the liquid level of the vertical oil tank 100, and the method for obtaining the liquid level of the vertical oil tank may include the following steps:

[0048] Step S101: Determine the estimated liquid level of the target oil volume in the vertical oil tank.

[0049] This step is mainly to make a rough estimate of the target oil level in advance when the vertical oil tank is receiving and sending oil. The target oil volume refers to the vertical oil tank after receiving and sending the oil from the vertical oil tank. The estimated liquid level of the target oil volume in the vertical tank refers to the level of the oil volume in the vertical tank after receiving and dispatching oil.

[0050] Step S102, extracting the estimated oil volume corresponding to the estimated liquid level from the database.

[0051] In this step, the database is used to record the corresponding relationship between the oil level and the oil volume of the vertical oil tank. The database can be deployed in the monitoring terminal 200. The user can access the database through the monitoring terminal 200 to query the level of the vertical oil tank. For the corresponding relationship with the oil volume, the estimated oil volume corresponding to the estimated liquid level determined in step S101 is extracted from the database.

[0052] In the process of receiving and dispatching oil from a vertical oil tank, the corresponding relationship between the oil level and the oil volume of the vertical oil tank is generally expressed by the oil volume calculation formula. The following calculation formula can be used to calculate the corresponding oil volume based on the liquid level. :

[0053]

[0054] Among them, m represents the amount of oil corresponding to the liquid level, ρ 20 Represents the standard density at 20°C (this value can be obtained by looking up a table or calculating), V t Represents the apparent volume (this value can be obtained by checking the tank capacity table of the liquid level), n indicates that the oil tank is an insulated tank or a non-insulated tank (corresponding to the values ​​3 and 2 in turn), t indicates the measured temperature of the oil in the tank, VCF 20 Represents the oil volume correction coefficient (you can check the table or calculate according to the type of material), G represents the quality of the floating plate (can be obtained by checking the tank capacity table).

[0055] Step S103: Obtain the initial oil volume, and obtain the volume per unit level of the vertical oil tank; calculate the level deviation according to the initial oil volume, the estimated oil volume, and the volume per unit level.

[0056] Among them, the initial oil volume refers to the volume of oil before receiving and dispatching oil in the vertical oil tank, and the volume per unit level of the vertical oil tank refers to the volume corresponding to the unit level of oil in the vertical oil tank , Liquid level deviation refers to the deviation of the liquid level corresponding to the initial oil volume before the oil receiving and dispatching operation and the liquid level corresponding to the estimated oil volume after the oil receiving and dispatching operation.

[0057] This step obtains the initial oil volume and the unit level volume of the vertical oil tank, which can be based on the initial oil volume before the oil sending and receiving operation, the estimated oil volume after the oil sending and receiving operation, and the unit of the vertical oil tank obtained The volume of the liquid level calculates the liquid level deviation.

[0058] In step S104, the estimated liquid level is corrected by using the liquid level deviation to obtain the liquid level value of the target oil volume.

[0059] This step is mainly to use the liquid level deviation calculated in step S103 to correct the estimated liquid level after receiving and dispatching the oil. The estimated liquid level can be adjusted when the liquid level deviation is significantly different from the estimated liquid level to obtain the target oil. The amount is the level value corresponding to the amount of oil in the vertical oil tank after receiving and sending oil.

[0060] The above-mentioned method for obtaining the liquid level of the vertical oil tank determines the estimated liquid level of the target oil volume in the vertical oil tank, and extracts the data corresponding to the estimated liquid level from the database that records the corresponding relationship between the liquid level and the oil volume. Estimate the oil volume, use the acquired initial oil volume, the volume of the unit level of the vertical oil tank and the estimated oil volume to calculate the liquid level deviation, and correct the estimated liquid level by the liquid level deviation to obtain the target oil level. The estimated liquid level of the target oil volume can be corrected for the liquid level deviation, and the liquid level can be obtained according to the oil volume of the vertical oil pipe, which overcomes the defect that the traditional technology cannot directly perform the inverse calculation of the oil volume to obtain the corresponding liquid level. Accurately obtain the liquid level corresponding to the target oil volume, which improves the efficiency and accuracy of obtaining the liquid level corresponding to the target oil volume. In the process of receiving and dispatching oil from the vertical tank, it is possible to efficiently and accurately determine the The liquid level value also improves the safety of vertical oil tank operations.

[0061] In an embodiment, the step of determining the estimated liquid level of the target oil amount in the vertical oil tank in step S101 may include:

[0062] Determine the estimated volume of the target oil volume; calculate the estimated liquid level of the target oil volume in the vertical oil tank according to the volume of the unit level and the estimated volume.

[0063] This embodiment mainly calculates the predicted liquid level of the target oil amount in the vertical oil tank based on the estimated volume of the target oil amount. Among them, the volume of the target oil volume after receiving and sending oil from the oil tank can be calculated in advance, and the volume of the target oil volume in the vertical oil tank corresponding to the volume of the unit liquid level of the vertical oil tank can be calculated in advance. Place value.

[0064] In an embodiment, further, the step of determining the estimated volume of the target oil amount in step S101 may include:

[0065] Obtain the target oil volume and obtain the oil density value; according to the target oil volume and density value, the target oil volume is converted into the estimated volume corresponding to the target oil volume through the density formula.

[0066] Among them, the density formula is a formula used to express the relationship between mass, volume, and density. Indicates that ρ is density, M is mass, and V is volume. This embodiment mainly calculates the estimated volume corresponding to the target oil volume in the vertical oil tank based on the target oil volume. Before sending and receiving oil from a vertical oil tank, you can determine the amount of oil in the vertical oil tank after receiving and sending the oil, that is, the target oil volume. You can obtain the density value of the oil by looking up a table, etc., according to the target oil volume and density value through the density formula The corresponding relationship between oil volume, oil volume and density, converts the target oil volume into an estimated volume corresponding to the target oil volume.

[0067] This embodiment obtains the estimated volume through the accurate target oil quantity, which improves the accuracy of the estimated volume calculation, helps ensure the accuracy of estimating the estimated liquid level of the target oil quantity, and is beneficial to obtain the oil after receiving and sending the oil. The accurate liquid level.

[0068] In an embodiment, further, the step of calculating the estimated liquid level of the target oil volume in the vertical oil tank according to the volume of the unit liquid level and the estimated volume in step S101 may include:

[0069] Calculate the ratio of the estimated volume to the volume per unit level; set the ratio to the estimated level of the target oil volume in the vertical tank.

[0070] In this embodiment, the ratio of the estimated volume corresponding to the target oil volume after receiving and sending the oil to the volume of the unit liquid level of the vertical oil tank is set as the estimated liquid level of the target oil volume in the vertical oil tank. Among them, the unit liquid level volume of a vertical oil tank can be accurately obtained by querying the relevant data table of the vertical oil tank. The technical solution of this implementation can accurately estimate the estimated liquid level and improve the accuracy of the estimated data. Sex.

[0071] In an embodiment, the step of obtaining the volume of the unit liquid level of the vertical oil tank in step S103 may include:

[0072] Determine the geometric characteristics of the vertical oil tank; obtain the geometric parameters of the vertical oil tank according to the geometric characteristics of the vertical oil tank; calculate the unit level volume of the vertical oil tank according to the geometric parameters.

[0073] Among them, the geometric feature refers to the feature used to describe the geometric shape of the vertical oil tank, and the geometric parameter refers to the shape feature parameter of the vertical oil tank with the geometric feature, such as parameters such as length, width, and height.

[0074] In this embodiment, by determining the geometric characteristics of the vertical oil tank and obtaining the geometric parameters of the vertical oil tank, the volume of the unit liquid level of the vertical oil tank is calculated according to the geometric parameters.

[0075] Generally speaking, a vertical oil tank can usually be regarded as a cylinder. The geometric parameters of the cylindrical vertical oil tank, such as the diameter and height of the oil tank, can be obtained by viewing the design drawings of the oil tank. The calculation formula calculates the volume of the vertical oil tank and then determines the volume per unit level of the vertical oil tank.

[0076] The technical solution of this embodiment takes into account that vertical oil tanks with different shapes and designs need to use different calculation methods to calculate the volume per unit level, and calculate the volume per unit level of the vertical oil tank based on the geometric characteristics of the vertical oil tank. It is possible to accurately calculate the volume per unit level of the vertical oil tank in combination with the actual shape of the vertical oil tank, which is beneficial to improve the accuracy of obtaining the level value of the target oil volume.

[0077] In an embodiment, the step of calculating the liquid level deviation according to the initial oil amount, the estimated oil amount, and the volume of the unit liquid level in step S103 may include:

[0078] Make the difference between the initial oil quantity and the estimated oil quantity to obtain the oil quantity deviation; obtain the oil density value; use the density formula to convert the oil quantity deviation into the volume deviation corresponding to the oil quantity deviation according to the oil quantity deviation and the density value; The ratio of the volume deviation to the volume of the unit liquid level of the vertical oil tank is set as the liquid level deviation.

[0079] In this embodiment, the oil quantity deviation refers to the deviation between the initial oil quantity in the vertical oil tank before receiving and sending oil and the estimated oil quantity after receiving and sending oil. In this embodiment, the oil quantity deviation is obtained by making the difference between the initial oil quantity and the estimated oil quantity, and the oil density value is obtained. Based on the density formula, the oil quantity deviation is converted into the volume deviation corresponding to the oil quantity deviation, that is, the sending and receiving The volume deviation corresponding to the oil volume deviation before and after the oil, and the ratio of the volume deviation and the volume of the unit liquid level of the vertical oil tank is set as the liquid level deviation.

[0080] The technical solution of this embodiment uses the accurate density formula and the volume of the unit liquid level of the vertical oil tank to calculate the corresponding liquid level deviation according to the deviation of the initial oil quantity and the estimated oil quantity, which further improves the target oil quantity. The accuracy of the level value acquisition.

[0081] In one embodiment, the step of correcting the estimated liquid level by using the liquid level deviation in step S104, and obtaining the liquid level value of the target oil quantity may include:

[0082] a. Extract the initial level value corresponding to the initial oil volume from the database;

[0083] This step is mainly to extract the initial level value corresponding to the initial oil volume before sending and receiving oil from the database.

[0084] b. Perform difference calculation between the initial liquid level value and the liquid level deviation to obtain the reference liquid level.

[0085] Among them, the initial liquid level value and the liquid level deviation are subtracted to obtain the reference liquid level, that is, the reference value of the estimated liquid level, which is used as a reference for the estimated liquid level and adjusted according to the actual situation.

[0086] c. Obtain the deviation value of the estimated liquid level and the reference liquid level, and compare the deviation value with the set threshold value; if the deviation value is less than or equal to the set threshold value, execute step d; otherwise, execute step e.

[0087] In this step, the difference between the estimated liquid level and the reference liquid level is performed to obtain the deviation value between the estimated liquid level and the reference liquid level, and the deviation value is compared with the set threshold. If the deviation value is less than or equal to For the set threshold, perform the following step d, otherwise, perform step e.

[0088] d. Set the estimated liquid level to the level value of the target oil volume.

[0089] In this step, when the deviation value is less than or equal to the set threshold value, the estimated liquid level is set as the liquid level value of the target oil volume to complete the acquisition of the target oil volume and liquid level value.

[0090] e. Set the reference liquid level as the estimated liquid level, extract the estimated oil volume corresponding to the estimated liquid level from the database, according to the initial oil volume, the estimated oil volume, and the unit liquid of the vertical tank Calculate the level deviation from the volume of the position, and perform steps b to c.

[0091] This step is mainly to reset the reference level to the estimated level of the target oil level when the deviation value is greater than the set threshold, and re-extract the estimated oil level corresponding to the estimated level in the database , And recalculate the liquid level deviation based on the initial oil volume, estimated oil volume, and the volume of the unit level of the vertical tank, and perform steps b to c again to complete the correction of the estimated liquid level. It is understandable that if the deviation value is still found to be greater than the set threshold when the steps b to c are re-executed, the estimated liquid level can be corrected again according to the method of step e. Generally speaking, the liquid level obtained after three corrections The position value is very close to the target value, which can fully meet the needs of oil sending and receiving operations.

[0092] This embodiment provides a technical solution for correcting the estimated liquid level, which can obtain the liquid level according to the oil volume of the vertical oil pipe, and overcomes the defect that the traditional technology cannot obtain the corresponding liquid level by directly performing the inverse calculation of the oil volume receiving and dispatching, and can be accurate Obtain the liquid level value of the target oil volume of the oil sending and receiving operation, and the calculation method is simple, and the liquid level value of the target oil volume can be obtained efficiently, and the efficiency of the oil sending and receiving operation is improved.

[0093] In an embodiment, the following steps may also be included:

[0094] Determine the advance amount of the liquid level alarm of the vertical oil tank; set the alarm liquid level of the vertical oil tank according to the advance amount and the level value of the target oil volume.

[0095] Among them, the advance amount of the liquid level alarm of the vertical oil tank refers to the advance alarm liquid level before the liquid level reaches the actual alarm level. This is because the operator of the vertical oil tank needs time to go to the job site, and the operator In the process of sending and receiving oil, it is necessary to monitor the oil tank level at all times. During this period, if other factors interfere with the monitoring of the liquid level, such as answering the phone, other emergency events, etc., it will cause a large deviation in the amount of oil sent and received, and sometimes even lead to accidents. For operational safety issues, the alarm needs to be set in advance. Through practice, whether it is collecting oil or sending oil, an early warning value of 50T is more appropriate (receiving / sending oil flow 300-800m 3 /h, the reaction time is 4-10 minutes).

[0096] In this embodiment, the advance amount of the liquid level alarm of the vertical oil tank is set, and the alarm liquid level of the vertical oil tank is set according to the advance amount and the target oil amount obtained in step S104, and an alarm is issued at the alarm liquid level and notified The operator adjusts the sending and receiving flow in advance, which is beneficial for the operator to rush to the job site in time and deal with the vertical oil tank accordingly, ensuring the safety of the operation.

[0097] In one embodiment, a device for obtaining the liquid level of a vertical oil tank is provided, with reference to image 3 , image 3 It is a schematic structural diagram of a liquid level acquisition device of a vertical oil tank according to an embodiment. The liquid level acquisition device of the vertical oil tank may include: a determination module 101, an extraction module 102, a calculation module 103, and an acquisition module 104;

[0098] The determining module 101 is used to determine the estimated liquid level of the target oil volume in the vertical oil tank;

[0099] The extraction module 102 is configured to extract the estimated oil volume corresponding to the estimated liquid level from a database; wherein the database records the corresponding relationship between the liquid level and the oil volume of the vertical oil tank;

[0100] The calculation module 103 is configured to obtain the initial oil volume, obtain the volume of the unit liquid level of the vertical oil tank; calculate the liquid level deviation according to the initial oil volume, the estimated oil volume, and the volume of the unit liquid level;

[0101] The obtaining module 104 is configured to correct the estimated liquid level by using the liquid level deviation to obtain the liquid level value of the target oil volume.

[0102] The above-mentioned vertical oil tank liquid level acquisition device enables the estimated liquid level of the target oil volume to be corrected for the liquid level deviation, and can obtain the liquid level according to the oil volume of the vertical oil pipe, which overcomes the inability of traditional technology to directly send and receive oil volume. The inverse calculation obtains the defect of the corresponding liquid level, and quickly and accurately obtains the liquid level corresponding to the target oil volume, which improves the efficiency and accuracy of obtaining the liquid level corresponding to the target oil volume. In the process of receiving and sending oil from the vertical oil tank, It can efficiently and accurately determine the liquid level value after receiving and dispatching oil, and also improve the safety of vertical oil tank operation.

[0103] The liquid level acquisition device of the vertical oil tank of the present invention corresponds to the liquid level acquisition method of the vertical oil tank of the present invention one-to-one. The technical features and benefits described in the embodiment of the above-mentioned vertical oil tank liquid level acquisition method The effects are all applicable to the embodiment of the liquid level acquisition device of the vertical oil tank, and it is hereby declared. For the specific definition of the liquid level acquisition device of the vertical oil tank, please refer to the above definition of the liquid level acquisition method of the vertical oil tank, which will not be repeated here. The various modules in the above-mentioned vertical oil tank liquid level acquisition device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules may be embedded in the form of hardware or independent of the processor in the computer equipment, or may be stored in the memory of the computer equipment in the form of software, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0104] In one embodiment, a vertical oil tank transceiver oil level early warning system is provided, refer to Figure 4 , Figure 4 It is a schematic structural diagram of a vertical oil tank receiving and sending oil level early warning system of an embodiment. The vertical oil tank receiving and sending oil level early warning system may include: a radar level gauge 400 and a control system 500 connected in signal; wherein,

[0105] The radar level gauge 400 is installed on the vertical oil tank, and can be used to obtain the real-time liquid level of the vertical oil tank in the process of sending and receiving oil, and send it to the control system 500;

[0106] The control system 500 is configured to execute the method for obtaining the liquid level of a vertical oil tank as described in any of the previous embodiments to obtain the early warning liquid level of the vertical oil tank, and to receive the real-time liquid level sent by the radar level gauge 400, according to Early warning liquid level and real-time liquid level for alarm processing.

[0107] In this embodiment, the real-time liquid level may be the liquid level value obtained by the radar level gauge 400 in the process of receiving and sending oil from a vertical oil tank. The control system 500 can adopt the DCS control system, that is, the distributed control system. The control system 500 can be set in the control room of the vertical oil tank, so that the staff can check different information in the control room. The vertical oil tank performs monitoring and early warning processing to realize the intuitive, accurate and efficient monitoring of multiple vertical oil tanks.

[0108] The above-mentioned vertical oil tank transceiver oil level early warning system, the control system signal is connected to the radar level gauge, the control system can obtain the real-time liquid level of the vertical oil tank through the radar level gauge, and according to the set early warning level and real-time The liquid level alarm processing, on the one hand, improves the efficiency and accuracy of obtaining the corresponding liquid level of the target oil volume. On the other hand, in the process of receiving and sending oil from the vertical tank, it can efficiently and accurately determine the liquid level after receiving and sending oil. The position value also improves the safety of vertical oil tank operations.

[0109] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage. In the medium, when the computer program is executed, it may include the procedures of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database, or other media used in the embodiments provided by the present invention may include non-volatile and/or volatile memory. Non-volatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not a limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Channel (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0110] Accordingly, in one embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, where the program is executed by the processor to achieve any one of the oil tank level in the above-mentioned embodiments. Obtaining method.

[0111] The above-mentioned computer storage medium, through its stored computer program, enables the estimated liquid level of the target oil volume to be corrected for the liquid level deviation, and can obtain the liquid level according to the oil volume of the vertical oil pipe, which overcomes the traditional technology that cannot directly send and receive oil volume. Perform the inverse calculation to obtain the defect of the corresponding liquid level, quickly and accurately obtain the liquid level corresponding to the target oil volume, and improve the efficiency and accuracy of obtaining the liquid level corresponding to the target oil volume. In the process of sending and receiving oil from the vertical tank , Can efficiently and accurately determine the liquid level value after receiving and sending oil, and also improve the safety of vertical oil tank operation.

[0112] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

[0113] The above-mentioned embodiments only express several embodiments of the present invention, and the descriptions are more specific and detailed, but they should not be understood as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.