An explosion-proof power distribution system for a crude oil settling tank

Abstract

The invention relates to the technical field of explosion-proof of crude oil settling tanks, and in particular to an explosion-proof power distribution system of a crude oil settling tank, comprising: collecting crude oil settling heating characteristic data of the crude oil settling tank within a plurality of cycles; performing stage comparison on the crude oil settling heating characteristic data to screen temperature error data in the crude oil settling heating characteristic data; determining a temperature adjustment amount of a temperature change curve diagram according to the length of a linear fitting segment of the number of continuous power-on times of a heating circuit in an abnormal heating state and the continuous power-on efficiency at the time of starting continuous power-on in the crude oil settling heating standard monitoring data; jointly determining a temperature change curve diagram according to the temperature adjustment amount and the crude oil settling heating characteristic data; and analyzing the temperature change curve diagram to determine a fault of the crude oil settling tank or a heating circuit. The invention improves the fault identification capability of the crude oil settling tank and the accuracy of continuous power-on state monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of heating equipment operation and maintenance, and in particular to an explosion-proof power distribution system for a crude oil settling tank. Background Art

[0002] Crude oil settling tank is an important equipment in the crude oil processing process, mainly used for the initial separation and settling of crude oil. During the crude oil mining and processing process, the crude oil will contain a certain amount of water, impurities and gas, etc. Through the role of the settling tank, these components can be separated to a certain extent, thereby improving the quality and purity of the crude oil.

[0003] Nowadays, electric heating is often used to settle crude oil. During the crude oil processing process, since crude oil and its products are flammable and explosive, relevant explosion-proof measures for distribution boxes are crucial.

[0004] Chinese patent application publication number CN118198910A discloses a constant temperature control system for explosion-proof power distribution cabinets, including a power distribution cabinet body, a support frame is rotatably connected to the inside of the power distribution cabinet body, two mutually hinged mounting panels are slidably clamped inside the support frame, a connecting shaft rotatably connected to the power distribution cabinet body is fixed on the top surface of the support frame, an air inlet pipe is connected and arranged between the tops of the two positioning pipes, and the bottom end of the air inlet pipe is connected and fixed to the air outlet pipe of the external air conditioning unit. In this invention, air is transported to the ventilation pipe through the pipeline of the external air conditioning unit, and the wind shield on the ventilation pipe can be rotated toward the local high-temperature position on the mounting panel to achieve the selected high-temperature position to dissipate heat from the heat source, which is conducive to improving the efficiency of targeted heat dissipation in the local area of ​​the power distribution cabinet, and the vacuum pump sucks the hot air inside the power distribution cabinet through the L-shaped pipe and the connecting pipe, which promotes the air exchange of the power distribution cabinet in a relatively sealed environment and improves the heat dissipation efficiency.

[0005] The above invention has the problem of inaccurate fault identification and inaccurate continuous power-on status monitoring due to failure to eliminate error data during the continuous power-on process and the loss of heating equipment caused by crude oil sedimentation heating with low power-on stability. Summary of the invention

[0006] To this end, the present invention provides an explosion-proof power distribution system for a crude oil settling box, which is used to overcome the problems in the prior art of inaccurate fault identification and inaccurate continuous power-on status monitoring due to the failure to eliminate error data in the continuous power-on process and the crude oil settling heating with low power-on stability, which leads to loss of heating equipment.

[0007] To achieve the above object, the present invention provides an explosion-proof power distribution system for a crude oil settling tank, comprising:

[0008] A plurality of collectors, which are arranged on valves and heaters of the crude oil settling tank, and are used to collect crude oil settling heating characteristic data of the crude oil settling tank in a plurality of cycles, wherein the crude oil settling heating characteristic data includes temperature, current, output voltage of the heater, and communication connection characteristic data between the crude oil settling tank and the heating circuit;

[0009] A basic processor connected to each collector for performing stage comparison on the crude oil settling heating characteristic data to filter the temperature error data in the crude oil settling heating characteristic data;

[0010] A data filter connected to the basic processor for clearing the temperature error data to output crude oil settling heating standard monitoring data;

[0011] a comprehensive processor connected to the basic processor and the data filter, for determining a temperature adjustment amount of a temperature change curve according to the length of a linear fitting segment of the number of continuous power-on times of the heating circuit in an abnormal heating state and the continuous power-on efficiency at the time of starting continuous power-on in the crude oil settling heating standard monitoring data, and for determining a temperature change curve according to the temperature adjustment amount and the crude oil settling heating characteristic data;

[0012] A fault processor, which is connected to the basic processor, the data filter and the comprehensive processor, and is used to analyze the temperature change curve diagram to determine the fault of the crude oil settling tank or the heating circuit, and determine the accuracy of the fault identification according to the error frequency ratio of the fault identification;

[0013] If the accuracy of the fault identification does not meet the requirement, the maximum allowed communication connection attempt duration is adjusted according to the frequency of communication connection establishment attempts.

[0014] Furthermore, the communication connection characteristic data between the crude oil settling tank and the heating circuit includes the continuous power-on time of the heating circuit, the duration of several attempts to establish communication between the heating circuit and the crude oil settling tank, and the number of attempts to establish communication.

[0015] Further, the basic processor performs a stage comparison on the crude oil settling heating characteristic data to filter the temperature error data in the crude oil settling heating characteristic data;

[0016] Each type of crude oil settling and heating characteristic data is divided into a number of to-be-screened data segments with the same sampling time length according to the standard sampling time length and compared with a number of corresponding control data segments in the historical data respectively;

[0017] If the difference between the power supply characteristic data in the to-be-screened data segment and the control power supply characteristic data in the control data segments respectively meets the abnormal data judgment condition, then the power supply characteristic data in the to-be-screened data segment is marked as abnormal data;

[0018] The abnormal data judgment condition is that the difference between the power supply characteristic data in the to-be-screened data segment and the control power supply characteristic data in the control data segment is greater than the corresponding preset difference.

[0019] Furthermore, when the data filter determines whether the data segment to be filtered is an abnormal data segment, the data filter calculates the number ratio of abnormal sampling points according to the number of abnormal power supply characteristic data in the data segment to be filtered and the total number of power supply characteristic data, and compares the number ratio of the abnormal sampling points with the preset number ratio;

[0020] If the proportion of the number of abnormal sampling points is greater than the preset proportion, the data segment to be screened is determined to be an abnormal data segment.

[0021] Further, the basic processor counts the number of abnormal data in the data segment to be screened and the number of power supply characteristic data in the data segment to be screened to determine whether the data segment to be screened is an abnormal data segment;

[0022] The basic processor records the abnormal data segment as the temperature error data;

[0023] Among them, the control data segment is a data segment in the historical data that is in the same time period as the data segment to be screened, and the data type of the control power supply characteristic data in the control data segment is the same as the data type and data collection time point of the power supply characteristic data in the data segment to be screened.

[0024] Further, the integrated processor determines the temperature adjustment amount of the temperature change curve diagram according to the length of the linear fitting segment of the continuous power-on times of the heating circuit in the abnormal heating state in the crude oil settling heating standard monitoring data and the continuous power-on efficiency at the time of starting the continuous power-on;

[0025] The integrated processor performs a linear regression analysis on the continuous power-on times and the continuous power-on efficiency to generate a linear fitting function image, determines the length of the linear fitting segment according to the linear fitting function image, and calculates the ratio of the length of the linear fitting segment to the total length of the linear fitting function image to obtain the length ratio of the linear fitting segment;

[0026] If the length ratio of the linear fitting segment is greater than the preset length ratio, a compensation adjustment is performed on the temperature of the temperature change curve;

[0027] The temperature compensation adjustment amount is positively correlated with the length ratio of the linear fitting segment.

[0028] Furthermore, the abnormal heating state also includes that the power-on stability of the heating circuit at the moment of starting continuous power-on is less than a preset power-on stability.

[0029] Further, the fault processor determines the accuracy of fault identification in response to the error number ratio of the fault identification. When determining the corresponding accuracy, the fault processor obtains the total number of fault identifications and the number of fault identification errors in a single cycle to calculate the error number ratio of the fault identification, and compares the error number ratio of the fault identification with a preset error number ratio;

[0030] If the error frequency ratio of the fault identification is greater than the preset error frequency ratio, it is determined that the accuracy of the fault identification does not meet the requirement, and the frequency of attempts to establish the communication connection between the crude oil settling box and the heating circuit is obtained.

[0031] Further, when the fault processor adjusts the maximum allowed communication connection attempt duration according to the communication connection attempt establishment frequency, the communication connection attempt establishment frequency is compared with a preset frequency;

[0032] If the frequency of attempts to establish the communication connection is greater than the preset frequency, the maximum allowed communication connection attempt duration is reduced.

[0033] Furthermore, the reduction range of the maximum allowed communication connection attempt duration set in the fault processor is determined by the difference between the communication connection establishment attempt frequency and the preset frequency.

[0034] Compared with the prior art, the beneficial effects of the present invention are that, by setting the screening temperature error data and performing stage comparison on the crude oil settling heating characteristic data, the error data in the crude oil settling heating characteristic data can be screened in a larger range, and the stage comparison method can avoid the problem of insufficient accuracy of data screening caused by comparing a single data; by adjusting the temperature of the temperature change curve, the influence of the continuous power-on efficiency reduction caused by the increase in the temperature of the distribution circuit or the heating equipment due to the continuous power-on of the heating circuit when the power-on stability is low can be reduced, the fault of the crude oil settling box or the heating circuit is determined according to the temperature change curve, and the maximum allowable communication connection attempt time is adjusted according to the frequency of communication connection attempts, which can reduce the influence of the interference of network security risks existing when the crude oil settling box and the heating circuit establish a communication connection on fault identification, thereby reducing the influence of the fault identification accuracy reduction, and the use of the above-mentioned coherent technical means improves the fault identification capability of the crude oil settling box and the accuracy of continuous power-on status monitoring.

[0035] Furthermore, the explosion-proof power distribution system of the present invention divides the crude oil settling and heating characteristic data into data segments, and uses data segment comparison to screen abnormal data segments to improve the accuracy of power supply characteristic data collection, thereby improving the accuracy of fault identification during the operation and maintenance management of the heating equipment, and further realizing the improvement of fault identification capability and the accuracy of continuous power-on status monitoring of the heating equipment.

[0036] Furthermore, the present invention reduces the influence of inaccurate temperature change curve graph on the accuracy of continuous power-on state monitoring caused by inaccurate identification of the temperature of the heating equipment or heater aging or loss reflected by the continuous power-on efficiency by compensating and adjusting the temperature in the temperature change curve graph according to the length of the linear fitting segment of the continuous power-on number of times in the abnormal heating state and the continuous power-on efficiency at the time of starting the continuous power-on, thereby further achieving the improvement of fault identification capability and the accuracy of continuous power-on state monitoring of the heating equipment.

[0037] Furthermore, the present invention can reduce the impact of insufficient fault identification accuracy caused by the interference of network viruses and other security risks on the accuracy of data collection during the communication connection between the crude oil settling tank and the heating circuit, by adjusting the maximum allowed attempted communication connection duration according to the proportion of the number of errors in fault identification and the frequency of attempts to establish the communication connection to be tested, thereby further achieving an improvement in the fault identification capability and the accuracy of monitoring the continuous power-on status of the heating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1It is a structural schematic diagram of the explosion-proof power distribution system of the crude oil settling tank of the present invention;

[0039] Figure 2 A flow chart of temperature error data screening according to an embodiment of the present invention;

[0040] Figure 3 This is a valve connection system diagram of a crude oil settling tank according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0043] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in this specification refers to the presence of features, integers, steps, operations, elements / components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements / components. It should be understood that when we refer to a module as being "connected" or "coupled" to another module, it may be directly connected or coupled to the other module, or there may be an intermediate unit. In addition, "connected" or "coupled" used herein may include wireless connection or wireless coupling.

[0044] See also Figure 1 As shown, it is a structural schematic diagram of the explosion-proof power distribution system of the crude oil settling box of the present invention, including:

[0045] A plurality of collectors, which are arranged on valves and heaters of the crude oil settling tank, and are used to collect crude oil settling heating characteristic data of the crude oil settling tank in a plurality of cycles, wherein the crude oil settling heating characteristic data includes temperature, current, output voltage of the heater, and communication connection characteristic data between the crude oil settling tank and the heating circuit;

[0046] A basic processor connected to each collector for performing stage comparison on the crude oil settling heating characteristic data to filter the temperature error data in the crude oil settling heating characteristic data;

[0047] A data filter connected to the basic processor for clearing the temperature error data to output crude oil settling heating standard monitoring data;

[0048] a comprehensive processor connected to the basic processor and the data filter, for determining a temperature adjustment amount of a temperature change curve according to the length of a linear fitting segment of the number of continuous power-on times of the heating circuit in an abnormal heating state and the continuous power-on efficiency at the time of starting continuous power-on in the crude oil settling heating standard monitoring data, and for determining a temperature change curve according to the temperature adjustment amount and the crude oil settling heating characteristic data;

[0049] A fault processor, which is connected to the basic processor, the data filter and the comprehensive processor, and is used to analyze the temperature change curve diagram to determine the fault of the crude oil settling tank or the heating circuit, and determine the accuracy of the fault identification according to the error frequency ratio of the fault identification;

[0050] If the accuracy of the fault identification does not meet the requirement, the maximum allowed communication connection attempt duration is adjusted according to the frequency of communication connection establishment attempts.

[0051] Specifically, the process of analyzing the temperature change curve to determine the fault of the crude oil settling tank or the heating circuit is the prior art of those skilled in the art. For example, the sudden changes in temperature, voltage, and current are used to determine whether there is a fault in the heating equipment or the heating circuit. The process of identifying the fault of the crude oil settling tank or the heating circuit based on the temperature change curve will not be described in detail here.

[0052] Specifically, the temperature change curve includes a temperature-time curve, a continuous power-on current-time curve, and a power-time curve.

[0053] Those skilled in the art can understand that drawing a temperature change curve graph and the temperature change curve graph are prior arts, so the temperature change curve graph and the generation process of the temperature change curve graph are not described in detail herein.

[0054] The present invention can screen the error data in the crude oil settling heating characteristic data in a larger range by setting the screening temperature error data and performing stage comparison on the crude oil settling heating characteristic data, and the stage comparison method can avoid the problem of insufficient accuracy of data screening caused by comparing a single data; by adjusting the temperature of the temperature change curve diagram, the influence of the continuous power-on efficiency reduction caused by the increase in the temperature of the distribution circuit or the heating equipment due to the continuous power-on of the heating circuit when the power-on stability is low and the overload and loss of the heating equipment caused by the continuous power-on can be reduced; the fault of the crude oil settling box or the heating circuit is determined according to the temperature change curve diagram, and the maximum allowable communication connection attempt duration is adjusted according to the frequency of the communication connection attempt, which can reduce the influence of the network security risk existing when the communication connection between the crude oil settling box and the heating circuit is established. The interference of the fault identification on the fault identification, which leads to the reduction of the fault identification accuracy, can be reduced. The above-mentioned coherent technical means are used to improve the fault identification capability of the crude oil settling box and the accuracy of the continuous power-on status monitoring.

[0055] Specifically, the communication connection characteristic data between the crude oil settling tank and the heating circuit includes the continuous power-on time of the heating circuit, the duration of several attempts to establish communication between the heating circuit and the crude oil settling tank, and the number of attempts to establish communication.

[0056] See also Figure 2 As shown, it is a flow chart of screening temperature error data in an embodiment of the present invention. In the figure, the steps of performing stage comparison on the crude oil settling heating characteristic data to screen the temperature error data in the crude oil settling heating characteristic data include:

[0057] Step S1, dividing each type of data of the crude oil settling and heating characteristic data into a number of to-be-screened data segments with the same sampling time length according to a standard sampling time length;

[0058] Step S2, comparing the data segment to be screened with a number of corresponding control data segments in the historical data;

[0059] Step S3, calculating the difference between the power supply characteristic data in the to-be-screened data segment and the reference power supply characteristic data in the reference data segments;

[0060] Step S4, if a single difference value satisfies the abnormal data judgment condition, marking the power supply characteristic data in the to-be-screened data segment as abnormal data;

[0061] Step S5, counting the number of abnormal data in the data segment to be screened and the number of power supply characteristic data in the data segment to be screened to determine whether the data segment to be screened is an abnormal data segment;

[0062] Step S6, recording the abnormal data segment as the temperature error data;

[0063] Among them, the control data segment is a data segment in the historical data that is in the same time period as the data segment to be screened, and the data type of the control power supply characteristic data in the control data segment is the same as the data type and data collection time point of the power supply characteristic data in the data segment to be screened.

[0064] In implementation, the explosion-proof power distribution system of the present invention divides the crude oil settling and heating characteristic data into data segments, and uses data segment comparison to screen abnormal data segments to improve the accuracy of power supply characteristic data collection, thereby improving the accuracy of fault identification during the operation and maintenance management of the heating equipment, and further realizing the improvement of fault identification capability and the accuracy of continuous power-on status monitoring of the heating equipment.

[0065] Specifically, the step of determining whether the data segment to be screened is an abnormal data segment includes:

[0066] Calculate the proportion of abnormal sampling points according to the number of abnormal power supply characteristic data in the data segment to be screened and the total number of power supply characteristic data;

[0067] Compare the number ratio of the abnormal sampling points with the preset number ratio;

[0068] If the proportion of the number of abnormal sampling points is greater than the preset proportion, the data segment to be screened is determined to be an abnormal data segment.

[0069] Specifically, the proportion of the number of abnormal sampling points is the ratio of the number of abnormal power supply characteristic data in the data segment to be screened to the total number of power supply characteristic data in the data segment to be screened.

[0070] In implementation, the optional range of the preset quantity ratio is [0.2, 0.3].

[0071] Preferably, the preferred embodiment of the preset quantity ratio is 0.25.

[0072] In implementation, the abnormal data judgment condition is that the difference between the power supply characteristic data in the to-be-screened data segment and the reference power supply characteristic data in the reference data segment is greater than the corresponding preset difference.

[0073] In implementation, the corresponding preset difference is the maximum fluctuation range set for the power supply characteristic data in the data segment to be screened in the prior art. When this maximum fluctuation range is exceeded, the corresponding power supply characteristic data in the data segment to be screened is determined to be abnormal data; for example, when the power supply characteristic data in the data segment to be screened is the continuous power-on current of the heater, the maximum fluctuation range of the continuous power-on current of the heater when it is continuously powered on is 0mA to 200mA.

[0074] Specifically, the temperature adjustment amount of the temperature change curve is determined according to the length of the linear fitting segment of the continuous power-on times of the heating circuit in the abnormal heating state in the crude oil settling heating standard monitoring data and the continuous power-on efficiency at the time of starting the continuous power-on, including:

[0075] Performing a linear regression analysis on the continuous power-on times and the continuous power-on efficiency to generate a linear fitting function image;

[0076] Determine the length of the linear fitting segment according to the linear fitting function image;

[0077] Calculating the ratio of the length of the linear fitting segment to the total length of the linear fitting function image to obtain the length ratio of the linear fitting segment;

[0078] If the length ratio of the linear fitting segment is greater than the preset length ratio, a compensation adjustment is performed on the temperature of the temperature change curve;

[0079] The temperature compensation adjustment amount is positively correlated with the length ratio of the linear fitting segment.

[0080] Specifically, the process of generating a linear fitting function image by using a linear regression analysis method is a conventional technical means well known to those skilled in the art, and the process of generating a linear fitting function image by using a linear regression analysis method will not be described in detail here.

[0081] Optionally, the optional range of the preset length ratio is [0.1, 0.25].

[0082] Preferably, the preferred embodiment of the preset length ratio is 0.15.

[0083] Specifically, for every value that the length proportion of the linear fitting segment exceeds the preset length proportion by less than 0.05, the temperature compensation adjustment amount is set to 1°C; if the length proportion of the linear fitting segment exceeds the preset length proportion by more than 0.05, the temperature compensation adjustment amount is increased by 0.1°C on the basis of 1°C for every 0.01 that exceeds 0.05; in one embodiment, there is currently no temperature compensation, that is, the temperature compensation adjustment amount is 0, and the length proportion of the linear fitting segment is 0.28, then the temperature compensation adjustment amount is 1°C + 0.1°C × (0.28-0.15) / 0.01 = 2.3°C.

[0084] In implementation, the present invention compensates and adjusts the temperature in the temperature change curve diagram according to the length of the linear fitting segment of the continuous power-on efficiency at the time of starting the continuous power-on, thereby reducing the influence of the inaccurate temperature change curve diagram on the accuracy of continuous power-on state monitoring caused by inaccurate identification of the temperature of the heating equipment or heater aging or loss reflected by the continuous power-on efficiency, and further achieves the improvement of fault identification capability and the accuracy of continuous power-on state monitoring of the heating equipment.

[0085] Specifically, the abnormal heating state includes that the power-on stability of the heating circuit at the moment of starting continuous power-on is less than a preset power-on stability.

[0086] Specifically, the selectable range of the preset power-on stability is [8%, 18%].

[0087] Preferably, the preferred embodiment of the preset first power-on stability is:

[0088] Specifically, determining the accuracy of fault identification according to the error frequency ratio of the fault identification includes:

[0089] Obtaining the total number of fault identifications and the number of fault identification errors within a single cycle to calculate the error ratio of the fault identification;

[0090] Comparing the error frequency ratio of the fault identification with the preset error frequency ratio;

[0091] If the error frequency ratio of the fault identification is greater than the preset error frequency ratio, it is determined that the accuracy of the fault identification does not meet the requirement, and the frequency of attempts to establish the communication connection between the crude oil settling tank and the heating circuit is obtained;

[0092] If the error frequency ratio of the fault identification is less than or equal to the preset error frequency ratio, it is determined that the accuracy of the fault identification meets the requirements.

[0093] Specifically, the error frequency ratio of fault identification is the ratio of the number of fault identification errors in a single cycle to the total number of fault identifications in a single cycle.

[0094] Specifically, the fault identification error includes fault location identification error, fault degree identification error and fault type identification error.

[0095] Optionally, the optional range of the preset error frequency ratio is [0.8, 0.9].

[0096] Preferably, the preferred embodiment of the preset error frequency ratio is 0.8.

[0097] Specifically, adjusting the maximum allowed communication connection attempt duration according to the communication connection attempt establishment frequency includes:

[0098] comparing a frequency of attempts to establish the communication connection with a preset frequency;

[0099] If the frequency of attempts to establish the communication connection is greater than the preset frequency, the maximum allowed communication connection attempt duration is reduced.

[0100] Specifically, the maximum allowed communication connection attempt duration is the maximum attempt establishment duration allowed to establish a communication connection between the crude oil settling tank and the heating circuit. When this maximum attempt establishment duration is exceeded, the communication connection process between the crude oil settling tank and the heating circuit is interrupted.

[0101] Specifically, the reduction range of the maximum allowed communication connection attempt duration is determined by the difference between the communication connection establishment attempt frequency and the preset frequency.

[0102] In practice, the preset frequency generally has an optional range of [6 times / minute, 12 times / minute].

[0103] Preferably, the preferred embodiment of the preset frequency is 8 times / minute.

[0104] In implementation, when the frequency of attempts to establish a communication connection exceeds the preset frequency by less than 4 times per minute, the current maximum allowed duration of attempts to establish a communication connection is adjusted to 0.9 times the current maximum allowed duration of attempts to establish a communication connection; when the frequency of attempts to establish a communication connection exceeds the preset frequency by 4 times per minute, the current maximum allowed duration of attempts to establish a communication connection is reduced by 2 seconds for each time the frequency exceeds the preset frequency by 1 time per minute; for example, if the current frequency of attempts to establish a communication connection is 10 times per minute and the current maximum allowed duration of attempts to establish a communication connection is 180 seconds, the current maximum allowed duration of attempts to establish a communication connection is adjusted to 180 seconds × 0.9 = 162 seconds.

[0105] See also Figure 3 As shown, it is a valve connection system diagram of a crude oil settling box according to an embodiment of the present invention, and its action flow is as follows:

[0106] 1. Liquid inlet process: liquid from wellhead → open valve 1 → enter the settling tank (valve 2 closed);

[0107] The produced crude oil usually contains water. In this process, the crude oil flows in through a "J"-shaped pipe extending to the bottom of the tank to collect and store the produced crude oil. Due to the different densities of water and crude oil, they naturally settle and stratify in the tank, with the upper layer being crude oil and the lower layer being water.

[0108] 2. Pipeline transportation process: Liquid from wellhead → Open valve 2 → Mass flow meter → Open valve 3 → Open valve 4 → Go to pipeline transportation process (valve 1 closed)

[0109] Screw pump low-level suction port → open valve 5 → screw pump → open valve 7 → mass flow meter → open valve 3 → open valve 4 → go to pipeline transportation process (other valves are closed);

[0110] Screw pump high-position suction port → open valve 6 → screw pump → open valve 7 → mass flow meter → open valve 3 → open valve 4 → go to pipeline transportation process (other valves are closed);

[0111] 3. Loading process: Gear oil pump loading suction port → open valve 8 → gear oil pump → open valve 10 → mass flow meter → open valve 11 → remove loading crane (other valves are closed)

[0112] 4. Tank cleaning process: gear oil pump tank cleaning suction port → open valve 9 → gear oil pump → open valve 12 → open valve 11 → go to loading crane pipe (other valves are closed)

[0113] 5. External connection process: gear oil pump loading suction port → open valve 8 → open valve 13 → go to external interface (other valves are closed).

[0114] During implementation, crude oil has obvious wax condensation phenomenon when the viscosity is lower than 40℃. In order to ensure the fluidity of crude oil, an electric heating tube is added inside, which is automatically controlled by the temperature controller. During normal operation, the liquid level temperature in the tank is maintained at 55±5℃2. In order to ensure that the heating tube is always immersed in the liquid to prevent dry burning, a liquid level control switch is added. When the liquid level drops to the specified position, the external oil pump (screw pump or gear oil pump) is automatically stopped; the electronic control system has a reserved function expansion interface, which can be configured according to usage requirements.

[0115] In practice, the control box adopts the national standard explosion-proof box structure; explosion-proof mark: Exd IIBT4; the left and right cavities are configured with the control cavity for installing control components, which will not be opened after assembly, and the wiring cavity is used for power and signal connection. The cavity structure can also be changed to upper and lower cavity configuration as needed.

[0116] The corresponding control circuit is configured according to the power of the equipment to meet the use and protection requirements. The main incoming line is introduced using an explosion-proof plug-in (Baoji Youtai 150A) for easy and quick connection. The power and signal interfaces are connected through Gland. The frequency converter for screw pump control is installed in the control box. The universal conversion switch on the box surface is used to control the start and stop and acceleration and deceleration of the motor (jog control, the starting speed can be pre-set to 50% of the rated speed, and then the acceleration and deceleration can be adjusted as needed).

[0117] The screw pump and gear oil pump control can realize automatic stop control through the liquid level switch installed on the oil tank, and the start-stop control can be configured in multiple locations as needed.

[0118] The heater uses a temperature controller (placed in the box, with a preset heating start temperature of 40°C and a stop temperature of 60°C) combined with a thermal resistor to achieve automatic control of the heating temperature.

[0119] In implementation, the present invention can reduce the impact of insufficient fault identification accuracy caused by the interference of network viruses and other security risks on the accuracy of data collection during the communication connection between the crude oil settling tank and the heating circuit by adjusting the maximum allowed attempted communication connection duration according to the proportion of the number of errors in fault identification and the frequency of attempts to establish the communication connection to be tested, thereby further achieving an improvement in the fault identification capability and the accuracy of monitoring the continuous power-on status of the heating equipment.

[0120] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An explosion-proof power distribution system for a crude oil settling tank, characterized in that: include: A plurality of collectors, which are arranged on valves and heaters of the crude oil settling tank, and are used to collect crude oil settling heating characteristic data of the crude oil settling tank in a plurality of cycles, wherein the crude oil settling heating characteristic data includes temperature, current, output voltage of the heater, and communication connection characteristic data between the crude oil settling tank and the heating circuit; A basic processor, which is connected to each collector, performs a stage comparison on the crude oil settling heating characteristic data to filter the temperature error data in the crude oil settling heating characteristic data, so as to filter the error data in the crude oil settling heating characteristic data in a larger range; A data filter connected to the basic processor for clearing the temperature error data to output crude oil settling heating standard monitoring data; a comprehensive processor connected to the data filter, for determining a temperature adjustment amount of a temperature change curve according to the length of a linear fitting segment of the number of continuous power-on times of the heating circuit in the abnormal heating state in the crude oil settling heating standard monitoring data and the continuous power-on efficiency at the time of starting the continuous power-on, and for determining a temperature change curve according to the temperature adjustment amount and the crude oil settling heating characteristic data; A fault processor, which is connected to the basic processor, the data filter and the comprehensive processor, and is used to analyze the temperature change curve diagram to determine the fault of the crude oil settling tank or the heating circuit, and determine the accuracy of the fault identification according to the proportion of the number of errors in the fault identification; Wherein, if the accuracy of the fault identification does not meet the requirement, the maximum allowed communication connection attempt duration is adjusted according to the frequency of communication connection attempt establishment; The basic processor performs a stage comparison on the crude oil settling heating characteristic data to filter the temperature error data in the crude oil settling heating characteristic data; Each type of crude oil settling and heating characteristic data is divided into a number of to-be-screened data segments with the same sampling time length according to the standard sampling time length and compared with a number of corresponding control data segments in the historical data respectively; If the difference between the power supply characteristic data in the to-be-screened data segment and the control power supply characteristic data in the control data segments respectively meets the abnormal data judgment condition, then the power supply characteristic data in the to-be-screened data segment is marked as abnormal data; The abnormal data judgment condition is that the difference between the power supply characteristic data in the to-be-screened data segment and the reference power supply characteristic data in the reference data segment is greater than the corresponding preset difference; The integrated processor determines the temperature adjustment amount of the temperature change curve diagram according to the length of the linear fitting segment of the continuous power-on times of the heating circuit in the abnormal heating state in the crude oil settling heating standard monitoring data and the continuous power-on efficiency at the time of starting the continuous power-on; When the data filter determines whether the data segment to be filtered is an abnormal data segment, the data filter calculates the number ratio of abnormal sampling points according to the number of abnormal power supply characteristic data in the data segment to be filtered and the total number of power supply characteristic data, and compares the number ratio of the abnormal sampling points with the preset number ratio; If the proportion of the number of abnormal sampling points is greater than the preset proportion, the data segment to be screened is determined to be an abnormal data segment; the basic processor counts the number of abnormal data in the data segment to be screened and the number of power supply feature data in the data segment to be screened to determine whether the data segment to be screened is an abnormal data segment; The basic processor records the abnormal data segment as the temperature error data; The control data segment is a data segment in the historical data that is in the same time period as the data segment to be screened, and the data type of the control power supply characteristic data in the control data segment is the same as the data type and the time point of data collection in the power supply characteristic data in the data segment to be screened; The integrated processor performs a linear regression analysis on the continuous power-on times and the continuous power-on efficiency to generate a linear fitting function image, determines the length of the linear fitting segment according to the linear fitting function image, and calculates the ratio of the length of the linear fitting segment to the total length of the linear fitting function image to obtain the length ratio of the linear fitting segment; If the length ratio of the linear fitting segment is greater than the preset length ratio, a compensation adjustment is performed on the temperature of the temperature change curve; The temperature compensation adjustment amount is positively correlated with the length ratio of the linear fitting segment.

2. The explosion-proof power distribution system for a crude oil settling tank according to claim 1, characterized in that: The communication connection characteristic data between the crude oil settling tank and the heating circuit include the continuous power-on time of the heating circuit, the duration of several attempts for the heating circuit and the crude oil settling tank to establish communication, and the number of attempts to establish communication.

3. The explosion-proof power distribution system for a crude oil settling tank according to claim 1, characterized in that: The abnormal heating state also includes that the power-on stability of the heating circuit at the moment of starting continuous power-on is less than a preset power-on stability.

4. The explosion-proof power distribution system for a crude oil settling tank according to claim 3 is characterized in that: The fault processor determines the accuracy of the fault identification in response to the error frequency ratio of the fault identification. When determining the corresponding accuracy, the fault processor obtains the total number of fault identifications and the number of fault identification errors in a single cycle to calculate the error frequency ratio of the fault identification, and compares the error frequency ratio of the fault identification with a preset error frequency ratio; If the error frequency ratio of the fault identification is greater than the preset error frequency ratio, it is determined that the accuracy of the fault identification does not meet the requirement, and the frequency of attempts to establish the communication connection between the crude oil settling box and the heating circuit is obtained.

5. The explosion-proof power distribution system for a crude oil settling tank according to claim 4, characterized in that: When the fault processor adjusts the maximum allowed communication connection attempt duration according to the communication connection attempt establishment frequency, the communication connection attempt establishment frequency is compared with a preset frequency; If the frequency of attempts to establish the communication connection is greater than the preset frequency, the maximum allowed communication connection attempt duration is reduced.

6. The explosion-proof power distribution system for a crude oil settling tank according to claim 5, characterized in that: The reduction range of the maximum allowed communication connection attempt duration set in the fault processor is determined by the difference between the communication connection establishment attempt frequency and the preset frequency.

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