Storage tank pressure abnormity monitoring method, control device and oil storage equipment

Abstract

The invention discloses a monitoring method and a control device for pressure abnormity of a storage tank and oil storage equipment. The storage tank pressure abnormity monitoring method comprises the following steps: acquiring an internal air pressure value of a first storage tank and an external air pressure value of the first storage tank, and subtracting the internal air pressure value from the external air pressure value to obtain an air pressure difference P delta 1; and when P delta1 is smaller than-P1 and reaches a first set time, the internal air pressure value of the first storage tank and the external air pressure value of the first storage tank are obtained again, the internal air pressure value is subtracted from the external air pressure value to obtain an air pressure difference, and when the air pressure difference is still smaller than-P1, first reminding information used for reminding that the breather valve does not inhale normally is sent. And the operation safety of the storage tank can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of oil storage, and in particular to a monitoring method, a control device and an oil storage device for abnormal pressure in a storage tank. Background Art

[0002] The breather valve is an indispensable safety device in the petrochemical, natural gas, liquid chemical storage and other industrial fields. The main function of the breather valve is to balance the pressure inside the tank by automatically opening and closing when the pressure inside and outside the tank is unbalanced, to prevent the tank from being damaged due to overpressure or pressure holding. The normal working state of the breather valve is crucial to the safe operation of the tank.

[0003] In the related art, if the breathing valve fails, such as stuck, leaking or slow response, it is easy to cause abnormal internal pressure of the storage tank. If it is not handled for a long time, it is easy to cause safety accidents such as tank damage and material overflow. Summary of the invention

[0004] The present invention provides a monitoring method, a control device and an oil storage device for abnormal pressure of a storage tank, which can monitor the changes in the internal and external pressures of the storage tank and promptly identify the abnormal conditions of the breathing valve to remind the operator to deal with it in time, thereby improving the safety of the operation of the storage tank.

[0005] The technical solution is as follows:

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

[0007] Obtain the internal pressure value of the first storage tank 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 Δ1 .

[0008] When P Δ1 When the pressure is less than -P1 and the first set time is reached, the internal pressure value of the first storage tank and the external pressure value of the first storage tank are obtained again, and the pressure difference is P obtained by subtracting the internal pressure value from the external pressure value. Δ2 When P Δ2 When it is less than -P1, the first reminder message is sent to remind the breathing valve that the breathing is not inhaling normally.

[0009] When P Δ1 When the pressure is greater than P4 and the second set time is reached, the internal pressure value of the first storage tank and the external pressure value of the first storage tank are obtained again, and the pressure difference is P obtained by subtracting the internal pressure value from the external pressure value. Δ3 When P Δ3When P1, P2, P3 and P4 are all greater than 0, a second reminder message is sent to remind the breathing valve that the exhaust is not normal.

[0010] The technical solution of the present disclosure is further described below:

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

[0012] When P Δ1 Within the range of [-P1, -P2] or [P3, P4], the breathing valve is in normal state.

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

[0014] When P Δ2 Within the range of [-P1, -P2], the breathing valve is in normal state.

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

[0016] When P Δ3 Within the range of [P3, P4], the breathing valve is in normal state.

[0017] In one embodiment, the first storage tank is provided 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 can calculate P Δ1 , P Δ2 and P Δ3 .

[0018] In one embodiment, the maximum pressure hold value that the first storage tank can withstand is -P5, -P5·N%<-P1, and the first storage tank is connected to the second storage tank. After sending the first reminder information for reminding that the breathing valve is not inhaling normally, the monitoring method also includes:

[0019] When -P5<P Δ2 ≤-P5·N%, and the second storage tank is in normal operation, the liquid in the second storage tank is transferred to the first storage tank until P Δ2 Greater than -P5·N%.

[0020] In one embodiment, during the process of transferring the liquid in the second storage tank to the first storage tank, the second storage tank needs to maintain a normal operating state.

[0021] In one embodiment, a pipeline is provided between the first storage tank and the second storage tank, and the pipeline is provided with a flow regulating valve. During the process of transferring the liquid from the second storage tank to the first storage tank, the monitoring method further comprises:

[0022] A difference in liquid level between one of the first tank and the second tank is determined.

[0023] According to the liquid level difference, the first oil pouring flow rate of the oil is determined.

[0024] According to the first oil pouring flow rate, the opening value of the flow regulating valve is adjusted to make the oil pouring flow rate between the first storage tank and the second storage tank within the set flow rate range.

[0025] In one embodiment, the maximum overpressure value that the storage tank can withstand is P6, P6·M%>P4, and the first storage tank is connected to the second storage tank. After sending the second reminder information for reminding that the breathing valve is not exhausted normally, the monitoring method further includes:

[0026] When P6·M%≤P Δ3 When P<P6 and the second tank is in normal operation, the liquid in the first tank is transferred to the second tank until P Δ3 Less than P6·M%.

[0027] In one embodiment, during the process of transferring the liquid from the first storage tank to the second storage tank, the second storage tank needs to maintain a normal operating state.

[0028] In one embodiment, a pipeline is provided between the first storage tank and the second storage tank, and the pipeline is provided with a flow regulating valve. During the process of transferring the liquid from the second storage tank to the first storage tank, the monitoring method further comprises:

[0029] A difference in liquid level between one of the first tank and the second tank is determined.

[0030] According to the liquid level difference, the first oil pouring flow rate of the oil is determined.

[0031] According to the first oil pouring flow rate, the opening value of the flow regulating valve is adjusted to make the oil pouring flow rate between the first storage tank and the second storage tank within the set flow rate range.

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

[0033] According to a third aspect of an embodiment of the present disclosure, there is also provided an oil storage device, comprising a first storage tank and the control device in the above embodiment, wherein the first storage tank is provided with a breathing valve.

[0034] The first storage tank is also provided 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 communicatively connected with the control device.

[0035] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0036] When the oil storage equipment is in operation, a monitoring method for abnormal tank pressure is applied, which can calculate the pressure difference according to the internal air pressure value and the external air pressure value of the first tank, and send a reminder message of abnormal breathing valve to the operator in time according to the size of the pressure difference, so as to remind the operator to check the abnormal breathing valve in time, avoid further causing abnormal internal pressure of the tank, avoid accidents such as tank damage and material overflow, and improve the safety of tank operation.

[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] BRIEF DESCRIPTION OF THE DRAWINGS The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and the description thereof are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 It is a structural schematic diagram of an oil storage device shown in an embodiment.

[0041] Figure 2 for Figure 1 The connection diagram of the control device and the differential pressure transmitter is shown.

[0042] Figure 3 FIG. 1 is a schematic diagram showing the connection between a control device and an air pressure detection component shown in another embodiment.

[0043] Figure 4 for Figure 1 A flow chart of a method for monitoring an oil storage device is shown.

[0044] Figure 5 It is a structural schematic diagram of an oil storage device shown in an embodiment.

[0045] Description of reference numerals:

[0046] 10. Oil storage equipment; 100. First storage tank; 110. Breathing 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 DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present disclosure more clear, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the present disclosure and do not limit the protection scope of the present disclosure.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0049] The breather valve is an indispensable safety device in the petrochemical, natural gas, liquid chemical storage and other industrial fields. The main function of the breather valve is to balance the pressure inside the tank by automatically opening and closing when the pressure inside and outside the tank is unbalanced, to prevent the tank from being damaged due to overpressure or pressure holding. The normal working state of the breather valve is crucial to the safe operation of the tank.

[0050] In the related art, the oil depot stores multiple tanks for storing fuel. When the breathing valve of the tank fails, such as being stuck and unable to exhaust or inhale, and being unable to close for a long time, the fuel volatile gas leaks, or the response is slow, the tank pressure is not adjusted in time, etc., which can easily cause abnormal internal pressure of the tank. If the breathing valve is not maintained or replaced for a long time, it is easy to cause the internal pressure of the tank to increase abnormally, causing safety accidents such as tank damage and material overflow, which can easily pose a serious threat to the safety of the staff in the oil depot.

[0051] Based on this, the present disclosure provides a monitoring method for abnormal tank pressure, which can monitor the changes in internal and external pressure of the tank and promptly identify abnormal conditions of the breathing valve to remind operators to deal with them in time, thereby improving the safety of tank operation.

[0052] In order to better understand the storage tank pressure abnormality monitoring method disclosed in the present invention, an oil storage device to which the storage tank pressure abnormality monitoring method is applied 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 breathing valve 110, and the pressure range of the breathing 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. When the processor 220 executes the computer program, the following monitoring method is implemented. The monitoring method includes:

[0055] Obtain the internal pressure value of the first storage tank 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 Δ1 .

[0056] When P Δ1 If the pressure difference is not within the range of [-P1, -P2] or [P3, P4], and the first set time is reached, the internal air pressure value of the first storage tank and the external air pressure value of the first storage tank are obtained again, and the air pressure difference is obtained by subtracting the internal air pressure value from the external air pressure value, and the air pressure difference is still not within the range of [-P1, -P2] or [P3, P4], then a reminder message is sent to remind that the breathing valve is abnormal.

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

[0058] When the oil storage equipment is in operation, a monitoring method for abnormal tank pressure is applied, which can calculate the pressure difference according to the internal air pressure value and the external air pressure value of the first storage tank, and timely send a reminder message indicating the abnormality of the breathing valve to the operator according to the size of the air pressure difference, so as to remind the operator to check the abnormal breathing valve in time. When PΔ1 is not within the range of [-P1, -P2] or [P3, P4], after reaching the first set time, the internal air pressure value of the first storage tank and the external air pressure value of the first storage tank are obtained again, and the pressure difference is obtained by subtracting the internal air pressure value from the external air pressure value. If the air pressure difference is still not within the range of [-P1, -P2] or [P3, P4], a reminder message for reminding the abnormality of the breathing valve is sent to avoid further causing the internal pressure abnormality of the storage tank, avoid accidents such as tank damage and material overflow, and improve the safety of tank operation.

[0059] It is understandable that the breathing valve is only needed to be used for adjustment when the first storage tank is overpressured or underpressured to a certain range. Therefore, the pressure range of the breathing valve in the working state 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 safe 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 are 1min to 1h, 1min to 45min, 1min to 30min, 3min to 30min, 30min to 1h, etc.

[0062] In some embodiments, P Δ1When it is not in the range of [-P1, -P2] or [P3, P4], including: when P Δ1 When the pressure is less than -P1 and the first set time is reached, the internal pressure value of the first storage tank and the external pressure value of the first storage tank are obtained again, and the pressure difference is P obtained by subtracting the internal pressure value from the external pressure value. Δ2 When P Δ2 When it is less than -P1, the first reminder message is sent to remind the breathing valve that it is not inhaling normally. This is convenient for reminding the operator to promptly check the abnormal breathing valve (including repairing or replacing the breathing valve) to avoid further abnormal internal pressure of the storage tank, avoid accidents such as storage tank damage and material overflow, and improve the safety of storage tank operation.

[0063] In some embodiments, P Δ1 When it is not in the range of [-P1, -P2] or [P3, P4], including: when P Δ1 When the pressure is greater than P4 and the second set time is reached, the internal pressure value of the first storage tank and the external pressure value of the first storage tank are obtained again, and the pressure difference is P obtained by subtracting the internal pressure value from the external pressure value. Δ3 When P Δ3 When it is greater than P4, a second reminder message is sent to remind the breathing valve that it is not venting normally. This is convenient for reminding the operator to promptly check the abnormal breathing valve (including repairing or replacing the breathing valve) to avoid further abnormal internal pressure of the storage tank, avoid accidents such as storage tank damage and material overflow, and improve the safety of storage tank operation.

[0064] In this way, the abnormal tank pressure monitoring method, control device and oil storage equipment can monitor the changes in internal and external pressures of the tank, and promptly identify abnormal conditions of the breathing valve to remind operators to deal with them in time, 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 are 1min to 1h, 1min to 45min, 1min to 30min, 3min to 30min, 30min to 1h, etc.

[0066] In one example, the first set time and / or the second design time is 3 minutes to 30 minutes, and can be specifically 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 may be many specific implementations of the first air pressure detection component and the second air pressure detection component, including but not limited to air pressure sensors and the like.

[0069] like Figure 4 As shown, in some embodiments, the monitoring method further includes: when P Δ1 In the range of [-P1, -P2] or [P3, P4], the breathing valve is in a normal state. In this way, the breathing valve can work normally to ensure the safe operation of the first storage tank.

[0070] like Figure 4 As shown, in some embodiments, the monitoring method further includes: when P Δ2 In the range of [-P1, -P2], the breathing valve is in a normal state. In this way, the breathing valve can work normally to ensure the safe operation of the first storage tank.

[0071] like Figure 4 As shown, in some embodiments, the monitoring method further includes: when P Δ3 In the range of [P3, P4], the breathing valve is in a normal state. In this way, the breathing valve can work normally to ensure 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 provided 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 Δ1 , P Δ2 and P Δ3 , and is connected to the control device 200 for communication. In this way, the differential pressure transmitter can directly detect the internal and external pressure difference 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 in the data processing process and improve the monitoring accuracy.

[0073] Or, refer to Figure 3As shown, in other embodiments, the storage tank is provided with a first air pressure detection component 130 for detecting the internal air pressure of the storage tank and a second air pressure detection component 140 for detecting the external air pressure of the storage tank, and the first air pressure detection component 130 and the second air pressure detection component 140 are connected to the control device 200 for communication. In this way, the internal air pressure of the storage tank is detected by the first air pressure detection component 130, and the detection result is sent to the control device 200, and the external air pressure of the storage tank is detected by the second air pressure detection component 140, and the detection result is sent to the control device 200, so that the control device 200 can obtain the internal air pressure value of the first storage tank and the external air pressure value of the first storage tank, and the pressure difference P is obtained by subtracting the internal air pressure value from the external air pressure value. Δ1 .

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

[0075] The first storage tank is connected with the second storage tank to form a group, and the oil depot has a plurality of groups.

[0076] Furthermore, the first storage tank may be in communication with at least two second storage tanks.

[0077] like Figure 5 As shown, in some embodiments, the maximum pressure hold value 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 the first reminder information for reminding that the breathing valve is not inhaling normally, the monitoring method also includes:

[0078] When -P5<P Δ2 ≤-P5·N%, and the second storage tank 300 is in normal operation, the liquid in the second storage tank 300 is transferred to the first storage tank until P Δ2 Greater than -P5·N%. In this way, when the pressure of the first tank approaches the rated value, the liquid in the second tank 300 is transported to the first tank to reduce the pressure of the first tank, thereby buying operating time for the operator to deal with the abnormal breathing valve and improving the operating safety of the oil storage equipment.

[0079] If it is necessary to explain, N% can be flexibly set according to the pressure holding performance of the first storage tank and the safe operation requirements of the oil storage equipment. For example, N% is selected from 50% to 95%, 60% to 90%, 60% to 85%, etc. Specifically, N% is 60%, 65%, 75%, 80%, 85%, 90%, etc.

[0080] It should be noted that when the second storage tank is in normal operation, it is generally believed that the pressure in the second storage tank is within a safe range, and the breathing valve of the second storage tank is working normally.

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

[0082] In some embodiments, during the process of transferring the liquid from the second storage tank to the first storage tank, the second storage tank 300 needs to maintain a normal operating state. In this way, the operation safety of the first storage tank and the second storage tank can be ensured during the process of transferring the liquid from the second storage tank to the first storage tank, thereby 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 provided with a flow regulating valve 160. During the process of transferring the liquid in the second storage tank 300 to the first storage tank 100, the monitoring method further includes:

[0084] A difference in liquid level between one of the first tank and the second tank is determined.

[0085] According to the liquid level difference, the first oil pouring flow rate of the oil is determined.

[0086] According to the first oil pouring flow rate, the opening value of the flow regulating valve 160 is adjusted so that the oil pouring 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 flow rate of the oil, so that the oil pouring flow rate is adjusted to the set flow rate range, reducing or avoiding the generation of a large amount of static electricity in the oil pipeline and storage tank due to too high a flow rate, causing safety hazards, and causing impact on the inner float of the pouring tank.

[0088] like Figure 5 As shown, in some embodiments, the maximum overpressure value that the storage tank can withstand is P6, P6·M%>P4, and the first storage tank is connected to the second storage tank. After sending the second reminder information for reminding that the breathing valve is not exhausted normally, the monitoring method also includes:

[0089] When P6·M%≤P Δ3 When P<P6 and the second storage tank 300 is in normal operation, the liquid in the first storage tank is transferred to the second storage tank until P Δ3 Less than P6·M%. In this way, when the pressure of the first tank approaches the rated value, the liquid in the first tank is transported to the second tank to reduce the overpressure value of the first tank, thereby buying operating time for the operator to deal with the abnormal breathing valve and improving the operating safety of the oil storage equipment.

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

[0091] In some embodiments, the second storage tank 300 needs to maintain a normal operating state during the process of transferring the liquid from the first storage tank to the second storage tank 300. In this way, the operation safety of the first storage tank and the second storage tank 300 can be ensured during the process of transferring the liquid from the first storage tank to the second storage tank 300, thereby 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 provided with a flow regulating valve 160. During the process of transferring the liquid from the second storage tank to the first storage tank, the monitoring method further includes:

[0093] A difference in liquid level between one of the first tank and the second tank is determined.

[0094] According to the liquid level difference, the first oil pouring flow rate of the oil is determined.

[0095] According to the first oil pouring flow rate, the opening value of the flow regulating valve is adjusted so that the oil pouring 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 flow rate, so that the oil pouring flow rate is adjusted to the set flow rate range, reducing or avoiding the generation of a large amount of static electricity in the oil pipeline and storage tank due to too high a flow rate, causing safety hazards, and causing impact on the inner float 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 a closed state, the first storage tank 100 is not connected to the second storage tank 300. When the switch valve 170 is in an open state, the first storage tank 100 is connected to the second storage tank 300 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 optional embodiments, the control device is configured to determine the size of the pouring oil flow rate and the standard flow rate, and adjust the opening value of the flow control valve according to the determination result. When the pouring oil flow rate is lower than the set flow rate range, the opening value of the flow control valve is increased. When the pouring oil flow rate is greater than the set flow rate range, the opening value of the flow control valve is reduced.

[0100] The opening k of the flow control valve, the liquid level difference h of the pouring tank / pouring tank (i.e., the first storage tank / the second group), and the diameter d of the pipeline are three factors that affect the pouring flow rate v of the oil in the pipeline; v is negatively correlated with d, and positively correlated with k and h. That is, the larger the diameter d of the pipeline, the smaller the pouring flow rate v of the oil. The larger the opening k of the flow control valve 160, the larger the pouring flow rate v of the oil. Then, in practical applications, the pouring flow rate of the oil can be calculated by calculation formula (1), where Δh is the liquid level difference of the pouring tank / pouring tank within the time length Δt. S is the cross-sectional area of ​​the pouring tank / pouring tank. S1 is the cross-sectional area of ​​the pipeline, which is calculated by calculation formula (2) πd2 / 4, and d is the diameter of the pipeline. In this way, the calculated pouring flow rate is compared with the specified set flow rate range. If it is lower than the set flow rate range, the opening of the flow control valve is increased. On the contrary, reduce the opening of the flow control valve until the oil pouring flow rate is adjusted to the specified set flow rate range.

[0101] It should be noted that there are many specific implementation methods of the control device, such as an integrated computer, an MOC controller, an on-board computer, a motion control card, a 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 memory, 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. In this way, using the processor, the control device can control the overall operation of the liquid storage device, such as operations associated with parameter acquisition, display, flow rate, pressure detection, etc. The control device may include one or more processors to execute instructions to complete the above operations. In addition, the control device may also include one or more interactive modules, such as a touch screen, operation input keys, etc., to facilitate interaction with the control device.

[0104] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, 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 only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the inventive concept of the present disclosure, and these all belong to the protection scope of the present disclosure.

Claims

1. A method for monitoring abnormal tank pressure, characterized in that: The storage tank includes a first storage tank provided with a breathing valve, the pressure range of the breathing valve in a working state is [-P1, -P2] and [P3, P4], and the monitoring method includes: Obtain the internal air pressure value of the first storage tank and the external air pressure value of the first storage tank, and subtract the internal air pressure value from the external air pressure value to obtain the air pressure difference P Δ1 ; When P Δ1 When the pressure is less than -P1 and the first set time is reached, the internal pressure value of the first storage tank and the external pressure value of the first storage tank are obtained again, and the pressure difference is P obtained by subtracting the internal pressure value from the external pressure value. Δ2 When P Δ2 When it is less than -P1, a first reminder message is sent to remind the breathing valve that the breathing valve is not inhaling normally; When P Δ1 When the pressure is greater than P4 and the second set time is reached, the internal pressure value of the first storage tank and the external pressure value of the first storage tank are obtained again, and the pressure difference is P obtained by subtracting the internal pressure value from the external pressure value. Δ3 When P Δ3 When it is greater than P4, a second reminder message is sent to remind that the breathing valve is not exhausting normally; Among them, P1, P2, P3 and P4 are all greater than 0.

2. The method for monitoring abnormal storage tank pressure according to claim 1, characterized in that: The monitoring method further comprises: When P Δ1 Within the range of [-P1, -P2] or [P3, P4], the breathing valve is in a normal state.

3. The method for monitoring abnormal storage tank pressure according to claim 1, characterized in that: The monitoring method further comprises: When P Δ2 Within the range of [-P1, -P2], the breathing valve is in a normal state; and / or, when P Δ3 Within the range of [P3, P4], the breathing valve is in a normal state.

4. The method for monitoring abnormal storage tank pressure according to claim 3, characterized in that: The first storage tank is provided 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 can calculate P Δ1 , P Δ2 and P Δ3 .

5. The method for monitoring abnormal storage tank pressure according to any one of claims 1 to 4, characterized in that: The maximum pressure hold value that the first storage tank can withstand is -P5, -P5·N%<-P1, and the first storage tank is connected to the second storage tank; after sending the first reminder information for reminding that the breathing valve is not inhaling normally, the monitoring method also includes: When -P5<P Δ2 ≤-P5·N%, and the second storage tank is in normal operation, the liquid in the second storage tank is transferred to the first storage tank until P Δ2 Greater than -P5·N%.

6. The method for monitoring abnormal storage tank pressure according to claim 5, characterized in that: During the process of transferring the liquid in the second storage tank to the first storage tank, the second storage tank needs to maintain the normal operating state.

7. The method for monitoring abnormal storage tank pressure according to claim 5, characterized in that: A pipeline is provided 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 liquid from the second storage tank to the first storage tank, the monitoring method further comprises: determining a liquid level difference between one of the first storage tank and the second storage tank; Determining a first oil pouring flow rate of the oil material according to the liquid level difference; According to the first oil pouring flow rate, the opening value of the flow regulating valve is adjusted to make the oil pouring flow rate between the first storage tank and the second storage tank within a set flow rate range.

8. The method for monitoring abnormal storage tank pressure according to any one of claims 1 to 4, characterized in that: The maximum overpressure value that the storage tank can withstand is P6, P6·M%>P4, and the first storage tank is connected to the second storage tank; after sending the second reminder information for reminding that the breathing valve is not exhausted normally, the monitoring method also includes: When P6·M%≤P Δ3 When P<P6 and the second storage tank is in normal operation, the liquid in the first storage tank is transferred to the second storage tank until P Δ3 Less than P6·M%.

9. The method for monitoring abnormal storage tank pressure according to claim 8, characterized in that: During the process of transferring the liquid in the first storage tank to the second storage tank, the second storage tank needs to maintain the normal operating state.

10. The method for monitoring abnormal storage tank pressure according to claim 8, characterized in that: A pipeline is provided 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 liquid from the second storage tank to the first storage tank, the monitoring method further comprises: determining a liquid level difference between one of the first storage tank and the second storage tank; Determining a first oil pouring flow rate of the oil material according to the liquid level difference; According to the first oil pouring flow rate, the opening value of the flow regulating valve is adjusted to make the oil pouring flow rate between the first storage tank and the second storage tank within a set flow rate range.

11. A control device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the monitoring method according to any one of claims 1 to 10 when executing the computer program.

12. An oil storage device, characterized in that: It includes a first storage tank and the control device according to claim 11, wherein the first storage tank is provided with a breathing valve; the first storage tank is also provided 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, and the differential pressure transmitter is communicatively connected with the control device.

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