Monitoring methods, control devices, and oil storage equipment for abnormal pressure in storage tanks

Abstract

This invention discloses a method, control device, and oil storage equipment for monitoring abnormal pressure in a storage tank. The method for monitoring abnormal pressure in a storage tank includes: acquiring the internal air pressure value and the external air pressure value of a first storage tank; and subtracting the internal air pressure value from the external air pressure value to obtain a pressure difference P. △1 When P △1 If the pressure is less than -P1 and a first set time has elapsed, the internal and external pressure values ​​of the first storage tank are acquired again. The pressure difference is calculated by subtracting the internal pressure value from the external pressure value. If the difference is still less than -P1, a first alert message is sent to remind the breather valve that it is not breathing properly. This improves the safety of the storage tank operation.

Description

Technical Field

[0001] This disclosure relates to the field of oil storage technology, and in particular to a method, control device, and oil storage equipment for monitoring abnormal pressure in storage tanks. Background Technology

[0002] Breather valves are indispensable safety devices in industrial fields such as petrochemicals, natural gas, and liquid chemical storage. Their main function is to automatically open and close to balance the pressure inside the storage tank when there is an imbalance between the internal and external pressures, preventing damage from overpressure or pressure buildup. The proper functioning of the breather valve is crucial for the safe operation of the storage tank.

[0003] In related technologies, malfunctions of the breather valve, such as jamming, leakage, or slow response, can easily cause abnormal internal pressure in the storage tank. If left unaddressed for an extended period, this can lead to tank damage, material spills, and other safety accidents. Summary of the Invention

[0004] This disclosure provides a method, control device, and oil storage equipment for monitoring abnormal pressure in storage tanks. It can monitor changes in internal and external pressure of the storage tank, promptly identify abnormal conditions of the breather valve, and remind operators to take timely action to improve the safety of storage tank operation.

[0005] The technical solution is as follows:

[0006] According to a first aspect of the present disclosure, a method for monitoring abnormal pressure in a storage tank is provided. The first storage tank is equipped with a breather valve, and the pressure range of the breather valve in its working state is [-P1, -P2] and [P3, P4]. The monitoring method includes:

[0007] Obtain the internal and external air pressure values ​​of the first storage tank, and subtract the internal air pressure value from the external air pressure value to obtain the pressure difference P. △1 .

[0008] When P △1 If the pressure is less than -P1 and after a first set time has elapsed, the internal pressure value and the external pressure value of the first storage tank are acquired again. The pressure difference P is obtained by subtracting the internal pressure value from the external pressure value. △2 When P △2 If the value is less than -P1, a first alert message is sent to remind the user that the breathing valve is not breathing properly.

[0009] When P △1 When the pressure is greater than P4, and after the second set time is reached, the internal pressure value and the external pressure value of the first storage tank are obtained again. The pressure difference P is obtained by subtracting the internal pressure value from the external pressure value. △3 When P △3If the value is greater than P4, a second alert message is sent to remind the user that the breathing valve has not properly released air. Here, P1, P2, P3, and P4 are all greater than 0.

[0010] The technical solution of this disclosure will be further explained below:

[0011] In one embodiment, the monitoring method further includes:

[0012] When P △1 If the breathing valve is within the range of [-P1, -P2] or [P3, P4], it is in normal condition.

[0013] In one embodiment, the monitoring method further includes:

[0014] When P △2 Within the range of [-P1, -P2], the breathing valve is in normal condition.

[0015] In one embodiment, the monitoring method further includes:

[0016] When P △3 If the range is [P3, P4], the breathing valve is in normal condition.

[0017] In one embodiment, the first storage tank is equipped with a differential pressure transmitter for detecting the internal air pressure of the first storage tank and for detecting the external air pressure of the first storage tank. The differential pressure transmitter is capable of calculating P. △1 P △2 and P △3 .

[0018] In one embodiment, the first storage tank can withstand a maximum pressure of -P5, where -P5·N% < -P1, and the first storage tank is connected to the second storage tank. After sending a first alert message to remind the breathing valve that it is not breathing properly, the monitoring method further includes:

[0019] When -P5 < P △2 When the oil content is ≤-P5·N%, and the second storage tank is in normal operating condition, the oil in the second storage tank is transferred to the first storage tank until P... △2 Greater than -P5·N%.

[0020] In one embodiment, the second storage tank must remain in normal operating condition during the process of transporting oil from the second storage tank to the first storage tank.

[0021] In one embodiment, a pipeline is provided between the first storage tank and the second storage tank, and the pipeline is equipped with a flow regulating valve. The monitoring method further includes:

[0022] Determine the liquid level difference between the first and second storage tanks.

[0023] Determine the first oil pouring rate based on the liquid level difference.

[0024] Based on the first oil reversing flow rate, adjust the opening value of the flow regulating valve to ensure that the oil reversing flow rate between the first and second storage tanks is within the set flow rate range.

[0025] In one embodiment, the maximum overpressure that the storage tank can withstand is P6, where P6·M% > P4, and the first and second storage tanks are connected. After sending a second reminder message to indicate that the breathing valve has not properly discharged air, the monitoring method further includes:

[0026] When P6·M%≤P △3 When P < P6, and the second storage tank is in normal operating condition, the oil from the first storage tank is transferred to the second storage tank until P... △3 Less than P6·M%.

[0027] In one embodiment, during the process of transferring oil from the first storage tank to the second storage tank, the second storage tank must remain in normal operating condition.

[0028] In one embodiment, a pipeline is provided between the first storage tank and the second storage tank, and the pipeline is equipped with a flow regulating valve. The monitoring method further includes:

[0029] Determine the liquid level difference between the first and second storage tanks.

[0030] Determine the first oil pouring rate based on the liquid level difference.

[0031] Based on the first oil reversing flow rate, adjust the opening value of the flow regulating valve to ensure that the oil reversing flow rate between the first and second storage tanks is within the set flow rate range.

[0032] According to a second aspect of the present disclosure, a control device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the monitoring method in any of the above embodiments.

[0033] According to a third aspect of the present disclosure, an oil storage device is also provided, including a first storage tank and a control device as described in the above embodiments, wherein the first storage tank is provided with a breather valve.

[0034] The first storage tank is also equipped with a differential pressure transmitter for detecting the internal air pressure of the storage tank and for detecting the external air pressure of the storage tank. The differential pressure transmitter is connected in communication with the control device.

[0035] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0036] During operation, the oil storage equipment employs a method for monitoring abnormal tank pressure. It can calculate the pressure difference based on the internal and external air pressure values ​​of the first storage tank and promptly send alerts to operators regarding abnormal breather valves based on the magnitude of the pressure difference. This facilitates timely troubleshooting of abnormal breather valves, preventing further internal pressure anomalies in the storage tank, avoiding tank damage, material spills, and other accidents, and improving the safety of the storage tank operation.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0038] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0039] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of an oil storage device shown in one embodiment.

[0041] Figure 2 for Figure 1 The diagram shows the connection between the control device and the differential pressure transmitter.

[0042] Figure 3 This is a schematic diagram showing the connection between the control device and the air pressure detection component in another embodiment.

[0043] Figure 4 for Figure 1 The flowchart shows the monitoring method for the oil storage equipment.

[0044] Figure 5 This is a schematic diagram of the structure of an oil storage device shown in one embodiment.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Oil storage equipment; 100. First storage tank; 110. Breather valve; 120. Differential pressure transmitter; 130. First air pressure detection component; 140. Second air pressure detection component; 150. Pipeline; 160. Flow regulating valve; 170. Switch valve; 200. Control device; 210. Memory; 220. Processor; 300. Second storage tank. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and do not limit the scope of protection of this disclosure.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0049] Breather valves are indispensable safety devices in industrial fields such as petrochemicals, natural gas, and liquid chemical storage. Their main function is to automatically open and close to balance the pressure inside the storage tank when there is an imbalance between the internal and external pressures, preventing damage from overpressure or pressure buildup. The proper functioning of the breather valve is crucial for the safe operation of the storage tank.

[0050] In related technologies, oil depots typically have multiple storage tanks for storing fuel oil. When the breather valve of a tank malfunctions—for example, if it becomes stuck and unable to vent or draw in air, or fails to close for an extended period, leading to leakage of fuel vapors, or if it responds slowly or fails to regulate tank pressure in a timely manner—it can easily cause abnormal internal pressure in the tank. If the breather valve is not maintained or replaced for a long time, the abnormal internal pressure in the tank can easily increase further, causing tank damage, material spills, and other safety accidents, posing a serious threat to the safety of personnel inside the oil depot.

[0051] Based on this, the present disclosure provides a method for monitoring abnormal pressure in storage tanks, which can monitor changes in internal and external pressure of the storage tank, identify abnormal conditions of the breather valve in a timely manner, and remind operators to take timely action to improve the safety of storage tank operation.

[0052] To better understand the tank pressure anomaly monitoring method disclosed herein, an oil storage device using the tank pressure anomaly monitoring method is described.

[0053] like Figures 1 to 4 As shown, in some embodiments, an oil storage device 10 is provided, including a first storage tank 100 and a control device 200. The first storage tank 100 is provided with a breather valve 110, and the pressure range of the breather valve in the working state is [-P1, -P2] and [P3, P4].

[0054] The control device 200 includes a memory 210 and a processor 220. The memory 210 stores a computer program, and the processor 220 executes the computer program to implement the following monitoring method. The monitoring method includes:

[0055] Obtain the internal and external air pressure values ​​of the first storage tank, and subtract the internal air pressure value from the external air pressure value to obtain the pressure difference P. △1 .

[0056] When P △1 If the pressure is not within the range of [-P1, -P2] or [P3, P4], after a first set time has elapsed, the internal pressure value and the external pressure value of the first storage tank are acquired again. The pressure difference is obtained by subtracting the internal pressure value from the external pressure value. If the pressure difference is still not within the range of [-P1, -P2] or [P3, P4], then an alert message is sent to remind the breathing valve of an abnormality.

[0057] Among them, P1, P2, P3 and P4 are all greater than 0.

[0058] During the operation of the oil storage equipment, a method for monitoring abnormal tank pressure was applied. This method calculates the pressure difference based on the internal and external air pressure values ​​of the first storage tank. Based on the magnitude of the pressure difference, timely alerts are sent to operators indicating abnormal breather valve operation, facilitating prompt investigation and troubleshooting of any malfunctions. △1 If the pressure is not within the range of [-P1, -P2] or [P3, P4], after a first set time, the internal pressure value and the external pressure value of the first storage tank are obtained again. The pressure difference is obtained by subtracting the internal pressure value from the external pressure value. If the pressure difference is still not within the range of [-P1, -P2] or [P3, P4], an alert message is sent to remind the breather valve of the abnormality to prevent further abnormal internal pressure in the storage tank, avoid damage to the storage tank, material spillage and other accidents, and improve the safety of the storage tank operation.

[0059] Understandably, the breather valve is only needed for regulation when the first storage tank is under overpressure or pressurized to a certain range. Therefore, the pressure range for the breather valve to be in operation is [-P1, -P2] and [P3, P4], and P1, P2, P3, and P4 are all greater than 0.

[0060] In addition, P1, P2, P3 and P4 are flexibly selected according to the safety operation requirements of the first storage tank.

[0061] It should be noted that the design time can also be flexibly set according to the safety operation requirements of the first storage tank. For example, the first set time and / or the second design time and / or the third design time can be 1 min to 1 h, 1 min to 45 min, 1 min to 30 min, 3 min to 30 min, 30 min to 1 h, etc.

[0062] In some embodiments, P △1When it is not in the range [-P1, -P2], nor in the range [P3, P4], including: when P △1 If the pressure is less than -P1 and after a first set time has elapsed, the internal pressure value and the external pressure value of the first storage tank are acquired again. The pressure difference P is obtained by subtracting the internal pressure value from the external pressure value. △2 When P △2 When the value is less than -P1, a first alert message is sent to remind operators that the breather valve is not properly inhaling. This facilitates timely inspection of abnormal breather valves (including repair or replacement), preventing further abnormal internal pressure in the storage tank, avoiding tank damage, material spills, and other accidents, and improving the safety of tank operation.

[0063] In some embodiments, P △1 When it is not in the range [-P1, -P2], nor in the range [P3, P4], including: when P △1 After the pressure is greater than P4 and the second set time is reached, the internal pressure value and the external pressure value of the first storage tank are obtained again. The pressure difference P is obtained by subtracting the internal pressure value from the external pressure value. △3 When P △3 When the value is greater than P4, a second alert message is sent to remind operators that the breather valve is not properly venting. This facilitates timely inspection of abnormal breather valves (including repair or replacement), preventing further abnormal internal pressure in the storage tank, avoiding tank damage, material spills, and other accidents, and improving the safety of tank operation.

[0064] Thus, the monitoring method, control device, and oil storage equipment for abnormal tank pressure can monitor changes in internal and external pressure of the tank, promptly identify abnormal conditions of the breather valve, and remind operators to take timely action, thereby improving the safety of tank operation.

[0065] It should be noted that the first set time, the second design time, and the third design time can also be flexibly set according to the safety operation requirements of the first storage tank. For example, the first set time and / or the second design time and / or the third design time can be 1 min to 1 h, 1 min to 45 min, 1 min to 30 min, 3 min to 30 min, 30 min to 1 h, etc.

[0066] In one example, the first set time and / or the second design time is 3 to 30 minutes. Specifically, it can be 3 minutes, 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, etc.

[0067] In one example, the third design time is 10 min to 1 h, 30 min to 1 h, etc. Specifically, it can be 10 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 1 h, etc.

[0068] There are various ways to implement the first and second air pressure detection components, including but not limited to air pressure sensors.

[0069] like Figure 4 As shown, in some embodiments, the monitoring method further includes: when P △1 If the pressure is within the range of [-P1, -P2] or [P3, P4], the breather valve is in normal condition. This ensures the breather valve functions properly and guarantees the safe operation of the first storage tank.

[0070] like Figure 4 As shown, in some embodiments, the monitoring method further includes: when P △2 Within the range of [-P1, -P2], the breather valve is in normal condition. Thus, the breather valve can function properly, ensuring the safe operation of the first storage tank.

[0071] like Figure 4 As shown, in some embodiments, the monitoring method further includes: when P △3 Within the range of [P3, P4], the breather valve is in normal condition. Thus, the breather valve can function properly, ensuring the safe operation of the first storage tank.

[0072] like Figure 1 as well as Figure 2 As shown, in some embodiments, the first storage tank 100 is equipped with a differential pressure transmitter 120 for detecting the internal air pressure of the first storage tank 100 and for detecting the external air pressure of the first storage tank 100. The differential pressure transmitter 120 can calculate P. △1 P △2 and P △3 It is also connected to the control device 200 for communication. In this way, the differential pressure transmitter can directly detect the pressure difference between the inside and outside of the first storage tank and send the relevant pressure difference information to the control device 200, which can reduce the transmission or calculation errors generated during data processing and improve the monitoring accuracy.

[0073] Or, refer to Figure 3As shown, in other embodiments, the storage tank is equipped with a first pressure detection component 130 for detecting the internal pressure of the storage tank and a second pressure detection component 140 for detecting the external pressure of the storage tank. Both the first pressure detection component 130 and the second pressure detection component 140 are communicatively connected to the control device 200. Thus, the first pressure detection component 130 detects the internal pressure of the storage tank and sends the detection result to the control device 200, while the second pressure detection component 140 detects the external pressure of the storage tank and sends the detection result to the control device 200. This allows the control device 200 to obtain the internal pressure value and the external pressure value of the first storage tank, and subtract the internal pressure value from the external pressure value to obtain the pressure difference P. △1 .

[0074] The storage tank also includes a second storage tank.

[0075] The first and second storage tanks are connected to form a group, and the oil depot has multiple groups.

[0076] In addition, the first storage tank can be connected to at least two second storage tanks.

[0077] like Figure 5 As shown, in some embodiments, the maximum pressure that the first storage tank can withstand is -P5, -P5·N% < -P1, and the first storage tank is connected to the second storage tank 300. After sending a first reminder message to indicate that the breathing valve is not breathing properly, the monitoring method further includes:

[0078] When -P5 < P △2 When the oil content is ≤-P5·N%, and the second storage tank 300 is in normal operating condition, the oil in the second storage tank 300 is transferred to the first storage tank until P... △2 Greater than -P5·N%. Thus, when the pressure in the first storage tank approaches the rated value, oil from the second storage tank (300) is transferred to the first storage tank to reduce the pressure in the first storage tank, giving operators more time to handle abnormal breathing valves and improving the operational safety of the oil storage equipment.

[0079] It should be noted that N% can be flexibly set according to the pressure resistance of the first storage tank and the safety operation requirements of the oil storage equipment. For example, N% can be selected from 50% to 95%, 60% to 90%, 60% to 85%, etc. Specifically, N% can be 60%, 65%, 75%, 80%, 85%, 90%, etc.

[0080] It should be noted that the second storage tank is generally considered to be in normal operating condition when the pressure inside the second storage tank is within a safe range and the breather valve of the second storage tank is working properly.

[0081] In some embodiments, the second storage tank may also use the above-mentioned monitoring method for abnormal tank pressure to determine whether the second storage tank 300 is in normal operating condition.

[0082] In some embodiments, during the process of transferring oil from the second storage tank to the first storage tank, the second storage tank 300 must remain in normal operating condition. This ensures the safe operation of both the first and second storage tanks during the oil transfer process, thus improving the safety of the oil storage equipment.

[0083] like Figure 5 As shown, in some embodiments, a pipeline 150 is provided between the first storage tank 100 and the second storage tank 300, and the pipeline 150 is equipped with a flow regulating valve 160. During the process of transporting oil from the second storage tank 300 to the first storage tank 100, the monitoring method further includes:

[0084] Determine the liquid level difference between the first and second storage tanks.

[0085] Determine the first oil pouring rate based on the liquid level difference.

[0086] Based on the first oil reversing flow rate, adjust the opening value of the flow regulating valve 160 so that the oil reversing flow rate between the first storage tank and the second storage tank 300 is within the set flow rate range.

[0087] In this way, the opening value of the flow regulating valve 160 is adjusted according to the oil pouring speed, thereby adjusting the oil pouring speed to the set speed range, reducing or avoiding the generation of a large amount of static charge in the oil pipeline and storage tank due to excessive flow speed, which could cause safety hazards and impact the internal floating roof of the pouring tank.

[0088] like Figure 5 As shown, in some embodiments, the maximum overpressure that the storage tank can withstand is P6, where P6·M% > P4, and the first and second storage tanks are connected. After sending a second reminder message to indicate that the breathing valve has not properly discharged air, the monitoring method further includes:

[0089] When P6·M%≤P △3 When P < P6, and the second storage tank 300 is in normal operating condition, the oil from the first storage tank is transferred to the second storage tank until P... △3 Less than P6·M%. Thus, when the pressure in the first storage tank approaches the rated value, the oil in the first storage tank is transferred to the second storage tank to reduce the overpressure value of the first storage tank, giving the operators more time to handle abnormal breathing valves and improving the operational safety of the oil storage equipment.

[0090] It should be noted that M% can be flexibly set according to the overpressure resistance of the first storage tank and the safety operation requirements of the oil storage equipment. For example, M% can be selected from 50% to 95%, 60% to 90%, 60% to 85%, etc. Specifically, N% can be 60%, 65%, 75%, 80%, 85%, 90%, etc.

[0091] In some embodiments, the second storage tank 300 must remain in normal operating condition during the process of transferring oil from the first storage tank to the second storage tank 300. This ensures the safe operation of both the first and second storage tanks during the transfer of oil from the first tank to the second storage tank 300, thus improving the safety of the oil storage equipment.

[0092] like Figure 5 As shown, in some embodiments, a pipeline is provided between the first storage tank and the second storage tank 300, and the pipeline is equipped with a flow regulating valve 160. The monitoring method further includes:

[0093] Determine the liquid level difference between the first and second storage tanks.

[0094] Determine the first oil pouring rate based on the liquid level difference.

[0095] Adjust the opening value of the flow regulating valve according to the first oil reversing flow rate so that the oil reversing flow rate between the first storage tank and the second storage tank 300 is within the set flow rate range.

[0096] In this way, the opening value of the flow regulating valve is adjusted according to the oil pouring speed, thereby adjusting the oil pouring speed to the set speed range, reducing or avoiding the generation of a large amount of static charge in the oil pipeline and storage tank due to excessive flow speed, which could cause safety hazards and impact the internal floating roof of the pouring tank.

[0097] like Figure 5 As shown, in some embodiments, a switch valve 170 is provided between the first storage tank 100 and the second storage tank 300. When the switch valve 170 is in the closed state, the first storage tank 100 and the second storage tank 300 are not connected. When the switch valve 170 is in the open state, the first storage tank 100 and the second storage tank 300 are connected through a pipeline.

[0098] In some embodiments, when the second storage tank 300 is in an abnormal operating state, the control device 200 controls the switch valve 170 to be in a closed state.

[0099] In some alternative implementations, the control device is configured to determine the magnitude of the backflow rate and the standard flow rate, and adjust the opening value of the flow control valve according to the determination result. When the backflow rate is lower than the set flow rate range, the opening value of the flow control valve is increased. When the backflow rate is higher than the set flow rate range, the opening value of the flow control valve is decreased.

[0100] The opening degree k of the flow regulating valve, the liquid level difference h between the inlet tank and the outlet tank (i.e., the first storage tank / second group), and the diameter d of the pipeline are three factors affecting the oil flow rate v in the pipeline; v is inversely correlated with d and positively correlated with k and h. That is, the larger the diameter d of the pipeline, the smaller the oil flow rate v. The larger the opening degree k of the flow regulating valve 160, the larger the oil flow rate v. In practical applications, the oil flow rate can be calculated by formula (1), where ∆h is the liquid level difference between the outlet tank and the inlet tank within the time ∆t. S is the cross-sectional area of ​​the inlet tank / outlet tank. S1 is the cross-sectional area of ​​the pipeline, which is calculated by formula (2) πd2 / 4, where d is the diameter of the pipeline. Thus, the calculated oil flow rate is compared with the specified set flow rate range. If it is lower than the set flow rate range, the opening degree of the flow regulating valve is increased. Conversely, reduce the opening of the flow regulating valve until the oil flow rate is adjusted to the specified set flow rate range.

[0101] It should be noted that there are many ways to implement the control device, such as integrated computer, MOC controller, vehicle computer, motion control card, programmable controller, etc.

[0102] It should be noted that the memory is configured to store various types of data to support the operation of the liquid storage device. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, etc.

[0103] It should be noted that the processor can be a microcontroller unit (MCU), a central processing unit (CPU), or a digital signal processor (DSP), etc. Thus, using a processor, the control device can control the overall operation of the liquid storage device, such as operations related to parameter acquisition, display, flow rate, and pressure detection. The control device may include one or more processors to execute instructions to complete the above operations. Furthermore, the control device may also include one or more interactive modules, such as a touchscreen or operation input keys, to facilitate interaction with the control device.

[0104] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A method of monitoring abnormal pressure of a storage tank, characterized by, The storage tank includes a first storage tank provided with a breather valve, the pressure range of the breather valve in the working state is [-P1, -P2] and [P3, P4], the monitoring method comprises: obtaining an internal air pressure value of the first tank and an external air pressure value of the first tank, and obtaining an air pressure difference P by subtracting the internal air pressure value from the external air pressure value △1 ; When P △1 is less than -P1, and after a first set time, the internal air pressure value of the first tank and the external air pressure value of the first tank are obtained again, and the air pressure difference P △2 is obtained by subtracting the internal air pressure value from the external air pressure value; when P △2 is less than -P1, the first reminding information for reminding that the breathing valve does not normally inhale is sent. When P △1 is greater than P4, and after reaching the second set time, the internal air pressure value of the first tank and the external air pressure value of the first tank are obtained again, and the air pressure difference P △3 is obtained by subtracting the internal air pressure value from the external air pressure value; when P △3 is greater than P4, the second reminding information for reminding that the breathing valve does not normally exhaust is sent. When P △1 The breathing valve is in normal state when P is in the range of [-P1, -P2] or [P3, P4]; or, when P △2 The breathing valve is in normal state when P is in the range of [-P1, -P2]; and / or, when P △3 The breathing valve is in normal state when P is in the range of [P3, P4]; wherein P1, P2, P3 and P4 are all greater than 0. The maximum pressure value that the first storage tank can withstand is -P5, -P5·N%< -P1, the first storage tank is communicated with the second storage tank; after sending the first reminding information for reminding that the breather valve does not normally inhale, the monitoring method further comprises: When -P5 △2 ≤ -P5 · N%, and the second tank is in normal operation, oil in the second tank is delivered into the first tank until P △2 is greater than -P5 · N%, and N% is 50% to 95%.

2. The method of monitoring tank pressure anomalies of claim 1, wherein, The first tank is provided with a differential pressure transmitter for detecting the internal air pressure of the first tank and for detecting the external air pressure of the first tank, which can calculate P △1 , P △2 , and P △3 .

3. The method of monitoring tank pressure anomalies of claim 1, wherein, During the process of transporting the oil in the second storage tank to the first storage tank, the second storage tank needs to maintain the normal operating state.

4. The method of monitoring tank pressure anomalies of claim 1, wherein, The first storage tank is provided with a pipeline between the first storage tank and the second storage tank, and the pipeline is provided with a flow regulating valve; during the process of transporting the oil in the second storage tank to the first storage tank, the monitoring method further comprises: Determining the liquid level difference between the first storage tank and the second storage tank; According to the liquid level difference, determining the first oil transfer flow rate of the oil; According to the first oil transfer flow rate, adjusting the opening value of the flow regulating valve, so that the oil transfer flow rate between the first storage tank and the second storage tank is within the set flow rate range.

5. The method of monitoring tank pressure anomalies according to claim 1 or 2, wherein, The maximum overpressure value that the storage tank can withstand is P6, P6·M%>P4, the first storage tank is communicated with the second storage tank; after sending the second reminding information for reminding that the breather valve does not normally exhaust, the monitoring method further comprises: when P6·M%≤P △3 when P6·M%≤P △3 less than P6·M%, M% being 50% to 95%.

6. The method of monitoring tank pressure anomalies of claim 5, wherein, During the process of transporting the oil in the first storage tank to the second storage tank, the second storage tank needs to maintain the normal operating state.

7. A control device characterized by comprising: The storage tank includes a first storage tank provided with a breather valve, the pressure range of the breather valve in the working state is [-P1, -P2] and [P3, P4], the monitoring method comprises:

8. An oil storage apparatus, characterized by, The maximum pressure value that the first storage tank can withstand is -P5, -P5·N%< -P1, the first storage tank is communicated with the second storage tank; after sending the first reminding information for reminding that the breather valve does not normally inhale, the monitoring method further comprises: During the process of transporting the oil in the second storage tank to the first storage tank, the second storage tank needs to maintain the normal operating state. The first storage tank is provided with a pipeline between the first storage tank and the second storage tank, and the pipeline is provided with a flow regulating valve; during the process of transporting the oil in the second storage tank to the first storage tank, the monitoring method further comprises: Determining the liquid level difference between the first storage tank and the second storage tank; According to the liquid level difference, determining the first oil transfer flow rate of the oil; According to the first oil transfer flow rate, adjusting the opening value of the flow regulating valve, so that the oil transfer flow rate between the first storage tank and the second storage tank is within the set flow rate range. The maximum overpressure value that the storage tank can withstand is P6, P6·M%>P4, the first storage tank is communicated with the second storage tank; after sending the second reminding information for reminding that the breather valve does not normally exhaust, the monitoring method further comprises: During the process of transporting the oil in the first storage tank to the second storage tank, the second storage tank needs to maintain the normal operating state. The storage tank includes a first storage tank provided with a breather valve, the pressure range of the breather valve in the working state is [-P1, -P2] and [P3, P4], the monitoring method comprises: The maximum pressure value that the first storage tank can withstand is -P5, -P5·N%< -P1, the first storage tank is communicated with the second storage tank; after sending the first reminding information for reminding that the breather valve does not normally inhale, the monitoring method further comprises: During the process of transporting the oil in the second storage tank to the first storage tank, the second storage tank needs to maintain the normal operating state. The first storage tank is provided with a pipeline between the first storage tank and the second storage tank, and the pipeline is provided with a flow regulating valve; during the process of transporting the oil in the second storage tank to the first storage tank, the monitoring method further comprises: Determining the liquid level difference between the first storage tank and the second storage tank; According to the liquid level difference, determining the first oil transfer flow rate of the oil; According to the first oil transfer flow rate, adjusting the opening value of the flow regulating valve, so that the oil transfer flow rate between the first storage tank and the second storage tank is within the set flow rate range. The maximum overpressure value that the storage tank can withstand is P6, P6·M%>P4, the first storage tank is communicated with the second storage tank; after sending the second reminding information for reminding that the breather valve does not normally exhaust, the monitoring method further comprises: During the process of transporting the oil in the first storage tank to the second storage tank, the second storage tank needs to maintain the normal operating state.

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