A pressure intelligent regulation system and method for butterfly valve

Abstract

The present invention discloses a pressure intelligent regulation system for butterfly valves, comprising an air collecting pipe module, a judgment module, a risk adjustment module, and an opening calculation module; the air collecting pipe module sets the air collecting pipe into several sections, and sets sensors and butterfly valves in the sections; the judgment module can judge the high-pressure risk and low-pressure risk of the air collecting pipe: when there is only an air collecting pipe with high-pressure risk or low-pressure risk, the system is judged to have a unidirectional risk; when there are air collecting pipes with both high-pressure risk and low-pressure risk, the system is judged to have a bidirectional risk; the unidirectional risk module can adjust the butterfly valve opening in a corresponding unidirectional manner when the system has a unidirectional risk; the bidirectional risk module can adjust the unidirectional risk several times when the system has a bidirectional risk, and in each adjustment, adjust the butterfly valve opening of the side with higher risk according to the risk degree of high-pressure risk and low-pressure risk. The present application optimizes and improves the instability of complex coupling.

Description

Technical Field

[0001] The present application relates to the technical field of pressure regulation for butterfly valves, and in particular to an intelligent pressure regulation system and method for butterfly valves. Background Art

[0002] The gas header plays a crucial role in the coking process, yet its internal pressure is constantly fluctuating. This is particularly true during the moment of coal loading into the coke oven, when the header pressure can fluctuate significantly. This significantly impacts the safety and efficiency of the coking process. When the header pressure is too low, outside air can infiltrate the furnace. This not only causes coke combustion, thereby reducing gas quality, but also, if large amounts of air are drawn into the carbonization chamber and into the raw gas, it can cause serious production accidents, resulting in significant economic losses and safety hazards for the company. When the header pressure is too high, the raw gas cannot be effectively recovered and instead escapes from leaky seals such as the furnace door and cover. Due to the numerous and difficult-to-control factors affecting the header pressure, coupled with the complex coupling between the various control circuits, header pressure regulation remains a technical challenge in coke oven control. To regulate pressure, butterfly valves are generally used in gas pressure regulation. A circular butterfly plate serves as the opening and closing element, rotating with the valve stem to achieve opening and closing. The opening of the butterfly valve in the pipeline varies linearly with the flow rate, meaning the greater the opening of the butterfly valve, the greater the flow rate. In the coke oven gas treatment process, butterfly valves are often used to control and regulate the gas flow to maintain stable gas collection pipe pressure. In this way, the system can automatically adjust the opening of the gas collection pipe butterfly valve to achieve the purpose of stabilizing the gas collection pipe pressure. However, in the variable-coupled coke oven gas collection pipe pressure system, how to regulate the gas collection pressure and maximize the optimization of coupled fluctuations under complex conditions to achieve a safe and stable effect is an urgent problem to be solved. Summary of the Invention

[0003] The embodiment of the present application provides a pressure intelligent regulation system for a butterfly valve, comprising a gas collecting pipe module, a judgment module, a risk adjustment module, and an opening calculation module;

[0004] The gas collecting pipe module includes several gas collecting pipes, which are divided into several sections. A pressure sensor and a butterfly valve are set in each section. The pressure sensor is used to obtain the pressure on the section, and the opening of the butterfly valve can adjust the section pressure.

[0005] The judgment module can judge the high-pressure risk and low-pressure risk of the gas collecting pipe by using the obtained segmented pressure: when there is only a gas collecting pipe with high-pressure risk or low-pressure risk, the system is judged to have a unidirectional risk; when there are gas collecting pipes with both high-pressure risk and low-pressure risk, the system is judged to have a bidirectional risk;

[0006] The risk adjustment module includes a one-way risk module and a two-way risk module;

[0007] Among them, the one-way risk module can adjust the opening of the butterfly valve in the corresponding one-way direction to adjust the pressure when the system has a one-way risk;

[0008] The bidirectional risk module can adjust the unidirectional risk several times when the system has bidirectional risk. In each adjustment, the butterfly valve opening of the side with higher risk is adjusted according to the risk level of high-pressure risk and low-pressure risk.

[0009] The opening calculation module can perform calculations based on the gas collecting pipe data, segmentation data and the acquired pressure data, and adjust the opening of the segmented butterfly valve based on the calculation results.

[0010] Among them, preferably, the judgment module obtains the pressure deviation of the gas collecting pipe by obtaining the segmented pressure; judges the risk of the gas collecting pipe based on the obtained pressure deviation, adds the gas collecting pipe with high pressure risk to the high pressure gas collecting list, and adds the gas collecting pipe with low pressure risk to the low pressure gas collecting list.

[0011] Preferably, when obtaining the segmented pressure of the gas collecting pipe, the measured pressure signal is converted into an electrical signal by a field transmitter and then sent to the control platform for calculation processing, and the numerical value used for calculation is normalized.

[0012] The present application also provides a method for using the above-mentioned intelligent pressure regulation system for a butterfly valve, comprising the following steps:

[0013] S1, set the system to include b gas collecting pipes JQ, JQ = [JQ1, JQ2, JQ3, ..., JQ b ], where the i-th collecting pipe is JQ i , set up JQ i It includes c segments IU, IU=[IU1,IU2,IU3,…,JQ c ], where the jth segment is IU j , set segment IU j The pressure improvement coefficient is ρ j , where the pressure improvement coefficient represents the ability of the butterfly valve installed in this section to improve the pressure of the gas collecting pipe;

[0014] S2, obtain the segmented IU at the first pressure monitoring time T1 j The pressure value θ j ;

[0015] Get T1 monitoring time gas collector JQ i Pressure

[0016] S3, set gas collecting pipe JQi The theoretical pressure is E0; set the gas collecting pipe JQ i High voltage difference threshold △E max , low voltage difference threshold △E min ;

[0017] Get T1 monitoring time collector JQ i The pressure deviation △E1=E1-E0;

[0018] When △E1≥△E max When the gas collecting pipe JQ i Add high pressure gas collection list GL;

[0019] When △E1≤△E min When the gas collecting pipe JQ i Add to the low pressure gas collection list DL;

[0020] S4, obtaining the high-pressure gas collection list GL and the low-pressure gas collection list DL at the monitoring time T1;

[0021] Set Segment IU j The basic opening of the butterfly valve each time it is adjusted is K0, wherein the maximum opening of the butterfly valve is set to Kmax and the minimum opening is set to Kmin;

[0022] When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are empty, the monitoring step ends;

[0023] When the low-pressure gas collection list DL is empty and the high-pressure gas collection list GL is not empty, the butterfly valve opening of the gas collection pipe segment in the high-pressure gas collection list GL is increased by K1, and this step is repeated until the butterfly valve reaches the maximum opening Kmax;

[0024] In which, the number of gas collecting pipes in the high-pressure gas collecting list GL is set to r1, the high-pressure gas collecting distribution γ1=r1 / b, then K1=ρjγ1K0;

[0025] When the high-pressure gas collection list GL is empty and the low-pressure gas collection list DL is not empty, the butterfly valve opening of the gas collection pipe in the low-pressure gas collection list DL is reduced by K1, and this step is repeated until the butterfly valve reaches the minimum opening K min ;

[0026] The number of gas collecting pipes in the low-pressure gas collecting list DL is set to r2, and the low-pressure gas collecting distribution γ2=r2 / b, then K1=ρ j γ2K0.

[0027] When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are not empty, the two-way risk adjustment step is executed: according to the risk level of the high-pressure gas collection list GL and the low-pressure gas collection list DL, the one-way risk is adjusted several times, and the butterfly valve opening of the side with higher risk is adjusted each time.

[0028] In step S4, when both the high-pressure gas collection list GL and the low-pressure gas collection list DL are not empty, the two-way risk adjustment step includes:

[0029] S41, set the high-pressure gas collection list GL to include n gas collection pipes, where the i-th high-pressure gas collection pipe is JQi, the j-th segment of JQi is IUj, the pressure improvement coefficient of IUj is ρj, and the pressure deviation of the high-pressure gas collection pipe JQi is △Ei;

[0030] Get the first high pressure score Among them, e is a natural constant;

[0031] Set the low-pressure gas collection list DL to contain m gas collection pipes, where the h-th low-pressure gas collection pipe is JQ h , JQ h The zth segment is HU z , HU z The pressure improvement coefficient is ρ z , among which, low pressure gas collecting pipe JQ h The pressure deviation is △E z ;

[0032] Get the first low pressure score Among them, e is a natural constant;

[0033] When GF1≥DF1, the gas collecting pipe JQ in the high pressure gas collecting list GL i The segmented butterfly valve opening is increased by K1, where Go to step S42;

[0034] When GF1<DF1, the gas collecting pipe JQ in the low pressure gas collecting list DL h Segmented HU z The butterfly valve opening is adjusted to K1, where Go to step S43;

[0035] Step S42: at the ath pressure monitoring time T a Get the high pressure gas collection list GL, where a>1, set T a The high pressure gas collection list GL obtained during monitoring time includes r1 gas collection pipes, among which gas collection pipe JQ i The pressure deviation is △E i ', get the ath high pressure score

[0036] According to the a-1th high pressure fraction GFa-1 at the a-1th pressure monitoring time Ta-1;

[0037] When GFa≥GFa-1, go to step S421;

[0038] When GFa<GFa-1, go to step S422;

[0039] Step S43: Obtain the low-pressure gas collection list DL at the a-th pressure monitoring time Ta, where a>1, set the low-pressure gas collection list DL at the Ta monitoring time to include r2 gas collection pipes, and the pressure deviation of the gas collection pipe JQh is △Ez', and obtain the a-th low-pressure score

[0040] According to the a-1th low pressure fraction DFa-1 at the a-1th pressure monitoring time Ta-1;

[0041] When DFa≥DFa-1, go to step S421;

[0042] When DFa<DFa-1, go to step S431;

[0043] Step S421: Send an abnormality alarm to the system;

[0044] Step S422: If GFa≥DFa-1, increase the butterfly valve opening of the segment IUj of the gas collecting pipe JQi in the high-pressure gas collecting list GL by Ka. Wherein, Ka-1 is the adjusted opening of the butterfly valve at the a-1th pressure monitoring time Ta-1, and the process goes to step S42 until the butterfly valve reaches the maximum opening Kmax;

[0045] If GF a <DF a-1 , add the gas collecting pipe JQ in the low pressure gas collecting list DL h Segmented HU z Adjust the butterfly valve opening to a smaller value K a , Go to step S42 until the butterfly valve reaches the minimum opening K min ;

[0046] Step S431: If DF a ≥GF a-1 , add the gas collecting pipe JQ in the low pressure gas collecting list DL h Segmented HU z The butterfly valve opening is adjusted to a smaller value Ka. Wherein, Ka-1 is the adjusted opening of the butterfly valve at the a-1th pressure monitoring time Ta-1, and the process goes to step S43 until the butterfly valve reaches the minimum opening Kmin;

[0047] If DFa<GFa-1, adjust the butterfly valve opening of the segment IUi of the gas collecting pipe JQi in the high pressure gas collecting list GL to a larger value Ka. Go to step S43 until the butterfly valve reaches the maximum opening Kmax.

[0048] In step S2, when obtaining the segmented pressure value of the gas collecting pipe, the value used for calculation is normalized. The normalization method is:

[0049] where θ j ′ is θ j After normalization, θ j-max Segment IU j The maximum pressure in the historical monitoring, Indicates rounding up.

[0050] In step S4, K is set as the total opening stroke of the butterfly valve, K max =K / 2, K min =K / 2π.

[0051] The beneficial effects achieved by this application are as follows:

[0052] The present application can realize the optimized regulation of segmented pressure in the multi-coke oven and multi-gas collecting pipe mode. The present application can judge the risk direction and risk degree of the gas collecting pipe, and then make targeted adjustments. Among them, when the gas collecting pipe generates bidirectional risks, the present application can overcome the problem of complex coupling between the various regulation loops, give corresponding strategies, and make optimized adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0054] Figure 1 This is a flow chart of the intelligent pressure regulation method for a butterfly valve in this application.

[0055] Figure 2 Flowchart of the two-way risk adjustment steps in this application.

[0056] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0058] The present application provides an intelligent gas collecting pipe pressure regulation system for butterfly valves. The system can be used for automatic regulation of segmented pressure in a multi-coke oven multi-gas collecting pipe mode. When there are multiple coke ovens in the system, the coke ovens are connected in parallel with each other, and there is a negative coupling relationship. The coke ovens are connected in series with the blowers, and there is a positive coupling relationship. Multiple coke ovens share a common blowing and condensing system, and the gas collecting pipes of each coke oven are connected in parallel into a main pipe entering the primary cooler. Therefore, when pressure is generated between the gas collecting pipes, complex coupling problems may also occur.

[0059] To overcome the above problems, the present application provides an intelligent pressure regulation system for a butterfly valve, comprising a gas collecting pipe module, a judgment module, a risk adjustment module, and an opening calculation module;

[0060] The gas manifold module includes a pressure sensor for detecting the pressure of each gas manifold segment. The coke oven system includes several gas manifolds, each segmented. Each segment is equipped with a pressure sensor and a pneumatic butterfly valve. The pressure sensor detects the pressure within the segment, and the butterfly valve opening adjusts the segment pressure. The judgment module uses the acquired segment pressures to determine the high-pressure and low-pressure risks of the gas manifolds. When only a gas manifold with high-pressure or low-pressure risk exists, the system is determined to have a unidirectional risk. When gas manifolds with both high-pressure and low-pressure risks exist, the system is determined to have a bidirectional risk. The risk adjustment module includes a unidirectional risk module and a bidirectional risk module. The unidirectional risk module adjusts the butterfly valve opening in the corresponding unidirectional direction to adjust the pressure when only high-pressure or low-pressure risk exists in the system. The bidirectional risk module performs multiple unidirectional risk adjustments when both high-pressure and low-pressure risks exist. In each unidirectional adjustment, the butterfly valve opening of the higher-risk risk is adjusted based on the degree of risk. The opening calculation module can perform calculations based on the gas collecting pipe data, segment data and the acquired pressure data, and adjust the opening of the segmented butterfly valve according to the calculation results.

[0061] Specifically, the system is configured to include b gas collecting pipes JQ, where JQ = [JQ1, JQ2, JQ3, ..., JQ b ], where the i-th collecting pipe is JQ i , set up JQ i It includes c segments IU, IU=[IU1,IU2,IU3,…,JQ c ], where the jth segment is IU j , set segment IU j The pressure improvement coefficient is ρ j , where the pressure improvement coefficient represents the ability of the butterfly valve installed on this section to improve the pressure of the gas collecting pipe;

[0062] At the first pressure monitoring time T1, the segmented IU is obtainedj The pressure value θ j When obtaining the pressure value in the gas collecting pipe, the measured pressure signal needs to be converted into an electrical signal through a field transmitter and then sent to the control platform for calculation and processing. During the calculation and processing, due to different sampling conditions of the gas collecting pipe, as well as different sampling times and locations, the magnitude of the collected signal may be different, which will affect the calculation results. Therefore, the values ​​used for calculation are first normalized. The specific method is as follows:

[0063] where θ j ′ is θ j After normalization, θ j-max Segment IU j The maximum pressure value in historical monitoring, ┌┐ means rounding up;

[0064] The first pressure monitoring time T1 is obtained when the gas collecting pipe JQ i Pressure E1;

[0065] in,

[0066] Set the gas collecting pipe JQ i The theoretical pressure is E0;

[0067] Get T1 time collector JQ i The pressure deviation △E1=E1-E0;

[0068] Set up the gas collecting pipe JQ i High voltage difference threshold △E max , low voltage difference threshold △E min ;

[0069] When △E1≥△E max When the gas collecting pipe JQ i Add the high-pressure gas collection list GL and arrange the high-pressure gas collection list GL in descending order of pressure deviation;

[0070] When △E1≤△E min When the gas collecting pipe JQ i Add the low-pressure gas collection list DL and arrange the low-pressure gas collection list DL in order of pressure deviation from low to high;

[0071] Set Segment IU j The basic opening of the butterfly valve each time it is adjusted is K0, K is the total opening stroke of the butterfly valve; set the maximum opening K of the butterfly valve max =K / 2, minimum opening K min =K / 2π;

[0072] When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are empty, it indicates that the pressure in the gas collection pipe is stable, and this monitoring step ends.

[0073] When the low-pressure gas collection list DL is empty and the high-pressure gas collection list GL is not empty, it means that the gas collection pipe only produces high-pressure deviation at this time, that is, the gas collection pipes are all in a high-pressure state. At this time, the number of gas collection pipes in the high-pressure gas collection list DL is obtained, r1, and the high-pressure gas collection distribution γ1=r1 / b is obtained. At this time, the butterfly valve opening of the gas collection pipe segment in the high-pressure gas collection list is increased by ρ j γ1K0, repeat this step until the butterfly valve reaches the maximum opening K max .

[0074] When the high-pressure gas collection list GL is empty and the low-pressure gas collection list DL is not empty, it means that the gas collection pipe only produces low-pressure deviation at this time, that is, the gas collection pipes are all in a low-pressure state. At this time, the number of gas collection pipes in the low-pressure gas collection list DL is obtained, r2, and the low-pressure gas collection distribution γ2=r2 / b is obtained. The butterfly valve opening of the segmented gas collection pipes in the low-pressure gas collection list is reduced by ρ j γ2K0, repeat this step until the butterfly valve reaches the minimum opening K min .

[0075] When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are not empty, it means that the pressure of the gas collection pipes in the system is high and low. At this time, it is necessary to consider that when adjusting the pressure of a single gas collection pipe, it will have an opposite effect on other gas collection pipes. In order to minimize these opposite adjustment effects, set the adjustment method:

[0076] Specifically, the high pressure gas collection list GL is set to contain n gas collection pipes, where the i-th high pressure gas collection pipe is JQ i , JQ i The jth segment is IU j , IU j The pressure improvement coefficient is ρ j , among which, high pressure gas collecting pipe JQ i The pressure deviation is △E i ;

[0077] Get the first high pressure score Among them, e is a natural constant;

[0078] Set the low-pressure gas collection list DL to contain m gas collection pipes, where the h-th low-pressure gas collection pipe is JQ h , JQ h The zth segment is HU z , HU z The pressure improvement coefficient is ρ z , among which, low pressure gas collecting pipe JQ h The pressure deviation is △Ez ;

[0079] Get the first low pressure score Among them, e is a natural constant;

[0080] When GF1>DF1, it is judged that the high pressure risk is greater, so the gas collecting pipe JQ in the high pressure gas collecting list GL is first i The segmented butterfly valve opening is increased to

[0081] Adjust segment IU j After the butterfly valve opening is adjusted, the high pressure gas collection list GL is obtained again at the second pressure monitoring time T2. It is set that the high pressure gas collection list GL contains r1 gas collection pipes, gas collection pipe JQ i The pressure deviation is adjusted to △E i ', get the second high pressure score

[0082]

[0083] Wherein, the interval between T2 and T1 is the first monitoring period ΔT1, T2=T1+ΔT1, wherein ΔT1∈[5s,12s];

[0084] When GF2 ≥ GF1, it indicates that the system is likely to have an abnormal fault and an alarm is issued to the system;

[0085] When GF2 < GF1, proceed to the following steps:

[0086] If GF2≥DF1, that is, the high pressure risk is still large, then the gas collecting pipe JQ in the high pressure gas collecting list GL will be i Segment IU j The butterfly valve opening is increased again to Repeat this step until the butterfly valve reaches the maximum opening K max When the stroke is kept at the maximum opening K max ;

[0087] If GF2 < DF1, the high pressure risk is reduced and the low pressure risk is increased. At this time, the gas collecting pipe JQ in the low pressure gas collecting list DL is removed. h Segmented HU z The butterfly valve opening is reduced to Repeat this step until the butterfly valve reaches the minimum opening K min When the stroke opening is kept at the minimum K min ;

[0088] When GF1<DF1, the low pressure risk is greater, so the gas collecting pipe JQ in the low pressure gas collecting list DL is first h Segmented HU z The butterfly valve opening is reduced to

[0089] Adjust segment HU z After the butterfly valve opening is adjusted, the low-pressure gas collection list DL is obtained again at the second pressure monitoring time T2. It is set that the low-pressure gas collection list DL contains r2 gas collection pipes, and the gas collection pipe JQ h The pressure deviation is adjusted to △E z ', get the second lowest pressure score

[0090]

[0091] When DF2 ≥ DF1, it indicates that the system is likely to have an abnormal fault and an alarm is issued to the system;

[0092] When DF2<DF1, go to the following steps:

[0093] If DF2≥GF1, that is, the low pressure risk is still high, then the gas collecting pipe JQ in the low pressure gas collecting list DL will be h Segmented HU z The butterfly valve opening is reduced to Repeat this step until the butterfly valve reaches the minimum opening K min When the opening is kept at the minimum K min ;

[0094] When DF2 is less than GF1, the low pressure risk is reduced and the high pressure risk is increased. At this time, the gas collecting pipe JQ in the high pressure gas collection list GL is i Segment IU i The butterfly valve opening is increased to Repeat this step until the butterfly valve reaches the maximum opening K max When the stroke is kept at the maximum opening K max ;

[0095] Specifically, in one embodiment, a system consisting of two coke ovens is set up, and the two coke ovens have a total of 4 gas collecting pipes JQ1, JQ2, JQ3, and JQ4 connected. The gas collecting pipes converge into the gas collecting main pipe in front of the primary cooler, flow through the gas-liquid separator, primary cooler, and blower, and are then sent to the purification and recovery process by the blower. After several processes such as desulfurization, ammonium sulfate, and final cooling and washing benzene, they are sent out in two ways: one way of coal gas is sent out; the other way of coal gas is returned to the furnace for coking in the coke oven. According to the process principles of coking and chemical product recovery, the pressure of the coke oven gas collecting pipe is required to be maintained within the range of 80-120Pa, and the coke discharge, coal loading, and reversing heating operations will cause the gas collecting pipe pressure to change continuously. Therefore, when the above-mentioned pressure change operations occur, the pressure data of the gas collecting pipe is collected. The four gas collecting pipes each include two sections to be pressure adjusted: JQ 1-1 , JQ 1-2 , JQ 2-1 , JQ 2-2, JQ 3-1 , JQ 3-2 , JQ 4-1 , JQ 4-2 The corresponding pressure improvement coefficients are 2.0, 1.8, 1.8, 1.8, 1.7, 1.6, and 1.9. A pressure sensor and start-up butterfly valve are installed in each segment. The pressure values ​​of all segments are obtained at the first monitoring time 10:30:00 after the reversing heating operation, which are 180Pa, 200Pa, 60Pa, 60Pa, 80Pa, 70Pa, 100Pa, and 110Pa respectively. The known process requires the pressure range of the gas collecting pipe pressure to be 80-120Pa. The pressure deviations of the segments are obtained and normalized to 0.4, 0.3, -0.2, -0.2, -0.1, 0.0, 0.0, and 0.0.

[0096] The pressure deviations of gas collecting pipes JQ1, JQ2, JQ3, and JQ4 are 0.7, -0.4, -0.1, and 0; JQ1 is added to the high-pressure gas collecting list GL, and gas collecting pipes JQ2 and JQ3 are added to the low-pressure gas collecting list DL.

[0097] At this time, GL = [JQ1], DL = [JQ3, JQ2];

[0098] Get the first high pressure fraction GF1 = 0.7 2 ln(e+1)=0.49×1.3=0.637;

[0099] First low pressure fraction DF1=[(-0.4) 2 +(-0.1) 2 ]ln(e+2) / 2=0.26×1.55=0.403;

[0100] At this time, GF1>DF1, it is judged that the high pressure risk is greater, and the segmented butterfly valve with GL=[JQ1] is adjusted to a larger value, where JQ 1-1 For example, JQ 1-1 The butterfly valve opening is increased by K1 = (1.8 × 1 × 0.7) K0 / (4 × 0.4) = 0.8 K0;

[0101] After adjusting the butterfly valve opening, the high-pressure gas collection list GL=[JQ1] is obtained again at the second monitoring time 10:30:20, and the pressure deviation △E i 'Adjust to 0.5, get the second high pressure fraction GF2 = 0.5 2 ln(e+1)=0.25×1.3=0.325;

[0102] At this time, GF2<GF1; GF2<DF1; at this time, the high pressure risk is reduced and the low pressure risk is increased; reduce the butterfly valve opening in the low pressure gas collection list DL[JQ3, JQ2] to JQ 3-1For example, the opening is reduced to K2 = (0.1 + 0.5) K1 / 0.5 = 1.2 K1.

[0103] Furthermore, the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein the method described in the above method embodiment is executed when the program is run.

[0104] Furthermore, the present invention also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the method described in the above method embodiment through the computer program.

[0105] Furthermore, it should be understood that since the configuration of each module is merely for the purpose of illustrating the functional units of the apparatus of the present invention, the physical devices corresponding to these modules may be the processor itself, or a portion of the software in the processor, a portion of the hardware, or a combination of software and hardware. Therefore, the number of modules in the figure is merely illustrative.

[0106] It will be understood by those skilled in the art that all or part of the processes in the methods for implementing the above embodiments of the present invention may also be accomplished by instructing related hardware through a computer program, and the computer program may be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each of the above method embodiments may be implemented. The computer program includes computer program code, which may be in source code form, object code form, executable file, or some intermediate form. The computer-readable storage medium may include any entity or device, medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal, and software distribution medium, etc., which may carry the computer program code.

[0107] The computer device may be a terminal, comprising a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is implemented by a network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a button, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse.

[0108] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An intelligent pressure regulating system for a butterfly valve, wherein the butterfly valve is arranged on a section of a gas collecting pipe to be pressure regulated, characterized in that: It includes gas collecting pipe module, judgment module, risk adjustment module and opening calculation module; The gas collecting pipe module can obtain the pressure of all segments of the gas collecting pipe, including several gas collecting pipes. The gas collecting pipe is arranged into several segments, and a pressure sensor and a butterfly valve are set in each segment. The pressure sensor is used to obtain the pressure on the segment, and the opening change of the butterfly valve can adjust the segment pressure; The judgment module can judge the high-pressure risk and low-pressure risk of the gas collecting pipe by using the obtained segmented pressure. When only the gas collecting pipe with high-pressure risk or low-pressure risk exists, the system is judged to have a unidirectional risk. When the gas collecting pipes with both high-pressure risk and low-pressure risk exist, the system is judged to have a bidirectional risk. The risk adjustment module includes a one-way risk module and a two-way risk module; Among them, the one-way risk module can adjust the opening of the butterfly valve in the corresponding one-way direction and adjust the segmented pressure when the system has a one-way risk; The bidirectional risk module can adjust the unidirectional risk several times when the system has bidirectional risk. In each adjustment, the butterfly valve opening of the side with higher risk is adjusted according to the risk level of high-pressure risk and low-pressure risk. The opening calculation module can perform calculations based on the gas collecting pipe data, segment data and the acquired pressure data, and adjust the opening of the segmented upper butterfly valve according to the calculation results.

2. The intelligent pressure regulating system for butterfly valves according to claim 1, characterized in that: The judgment module obtains the pressure deviation of the gas collecting pipe by obtaining the segmented pressure; judges the risk of the gas collecting pipe based on the obtained pressure deviation, adds the gas collecting pipe with high pressure risk to the high pressure gas collecting list, and adds the gas collecting pipe with low pressure risk to the low pressure gas collecting list.

3. The intelligent pressure regulating system for butterfly valves according to claim 1, characterized in that: When obtaining the segmented pressure of the gas collecting pipe, the measured pressure signal is converted into an electrical signal through the field transmitter and then sent to the control platform for calculation and processing, and the value used for calculation is normalized.

4. A method for using the intelligent pressure regulation system for a butterfly valve according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, set the system to include b gas collecting pipes JQ, JQ = [JQ1, JQ2, JQ3, ..., JQ b ], where the i-th collecting pipe is JQ i , set up JQ i It includes c segments IU, IU=[IU1,IU2,IU3,…,JQ c ], where the jth segment is IU j , set segment IU j The pressure improvement coefficient is ρ j , where the pressure improvement coefficient represents the ability of the butterfly valve installed in this section to improve the pressure of the gas collecting pipe; S2, obtain the segmented IU at the first pressure monitoring time T1 j The pressure value θ j ; Get T1 monitoring time gas collector JQ i Pressure S3, set gas collecting pipe JQ i The theoretical pressure is E0; set the gas collecting pipe JQ i High voltage difference threshold △E max , low voltage difference threshold △E min ; Get T1 monitoring time collector JQ i The pressure deviation △E1=E1-E0; When △E1≥△E max When the gas collecting pipe JQ i Add high pressure gas collection list GL; When △E1≤△E min When the gas collecting pipe JQ i Add to the low pressure gas collection list DL; S4, obtaining the high-pressure gas collection list GL and the low-pressure gas collection list DL at the monitoring time T1; Set segment IU j The basic opening of the butterfly valve is K0 each time it is adjusted, and the maximum opening of the butterfly valve is K max , the minimum opening is K min ; When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are empty, the monitoring step ends; When the low-pressure gas collection list DL is empty and the high-pressure gas collection list GL is not empty, the butterfly valve opening of the gas collection pipe segment in the high-pressure gas collection list GL is increased by K1, and this step is repeated until the butterfly valve reaches the maximum opening Kmax; In which, the number of gas collecting pipes in the high-pressure gas collecting list GL is set to r1, the high-pressure gas collecting distribution γ1=r1 / b, then K1=ρjγ1K0; When the high-pressure gas collection list GL is empty and the low-pressure gas collection list DL is not empty, the butterfly valve opening of the gas collection pipe segment in the low-pressure gas collection list DL is reduced by K1, and this step is repeated until the butterfly valve reaches the minimum opening Kmin; Among them, the number of gas collecting pipes in the low-pressure gas collecting list DL is set to r2, the low-pressure gas collecting distribution γ2=r2 / b, then K1=ρjγ2K0; When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are not empty, the two-way risk adjustment step is executed: according to the risk level of the high-pressure gas collection list GL and the low-pressure gas collection list DL, the one-way risk is adjusted several times, and the butterfly valve opening of the side with higher risk is adjusted each time.

5. The method for the intelligent pressure regulation system for butterfly valves according to claim 4, characterized in that: In step S4, when both the high-pressure gas collection list GL and the low-pressure gas collection list DL are not empty, the two-way risk adjustment step includes: S41, set the high pressure gas collection list GL to include n gas collection pipes, where the i-th high pressure gas collection pipe is JQ i , JQ i The jth segment of j , IU j The pressure improvement coefficient is ρ j , among which, high pressure gas collecting pipe JQ i The pressure deviation is △E i ; Get the first high pressure score Among them, e is a natural constant; Set the low-pressure gas collection list DL to contain m gas collection pipes, where the h-th low-pressure gas collection pipe is JQ h , JQ h The zth segment is HU z , HU z The pressure improvement coefficient is ρ z , among which, low pressure gas collecting pipe JQ h The pressure deviation is △E z ; Get the first low pressure score Among them, e is a natural constant; When GF1≥DF1, the gas collecting pipe JQ in the high pressure gas collecting list GL i The segmented butterfly valve opening is increased by K1, where Go to step S42; When GF1<DF1, the gas collecting pipe JQ in the low pressure gas collecting list DL h Segmented HU z The butterfly valve opening is adjusted to K1, where Go to step S43; Step S42: at the ath pressure monitoring time T a Get the high pressure gas collection list GL, where a>1, set T a The high pressure gas collection list GL obtained during monitoring time includes r1 gas collection pipes, among which gas collection pipe JQ i The pressure deviation is △E i ', get the ath high pressure score According to the a-1th high pressure fraction GFa-1 at the a-1th pressure monitoring time Ta-1; When GFa≥GFa-1, go to step S421; When GFa<GFa-1, go to step S422; Step S43: Obtain the low-pressure gas collection list DL at the a-th pressure monitoring time Ta, where a>1, set the low-pressure gas collection list DL at the Ta monitoring time to include r2 gas collection pipes, and the pressure deviation of the gas collection pipe JQh is △Ez', and obtain the a-th low-pressure score According to the a-1th low pressure fraction DFa-1 at the a-1th pressure monitoring time Ta-1; When DFa≥DFa-1, go to step S421; When DFa<DFa-1, go to step S431; Step S421: Send an abnormality alarm to the system; Step S422: If GFa≥DFa-1, increase the butterfly valve opening of the segment IUj of the gas collecting pipe JQi in the high-pressure gas collecting list GL by Ka. Wherein, Ka-1 is the adjustment opening of the butterfly valve at the a-1th pressure monitoring time Ta-1, and the process goes to step S42 until the butterfly valve reaches the maximum opening K max ; If GF a <DF a-1 , add the gas collecting pipe JQ in the low pressure gas collecting list DL h Segmented HU z Adjust the butterfly valve opening to a smaller value K a , Go to step S42 until the butterfly valve reaches the minimum opening K min ; Step S431: If DFa≥GFa-1, reduce the butterfly valve opening of the segment HUz of the gas collecting pipe JQh in the low-pressure gas collecting list DL by Ka. Wherein, Ka-1 is the adjusted opening of the butterfly valve at the a-1th pressure monitoring time Ta-1, and the process goes to step S43 until the butterfly valve reaches the minimum opening Kmin; If DFa<GFa-1, adjust the butterfly valve opening of the segment IUi of the gas collecting pipe JQi in the high pressure gas collecting list GL to a larger value Ka. Go to step S43 until the butterfly valve reaches the maximum opening Kmax.

6. The method for the intelligent pressure regulation system for butterfly valves according to claim 4, characterized in that: In step S2, when obtaining the segmented pressure values ​​of the gas collecting pipe, the values ​​used for calculation are normalized. The normalization method is: where θ j ′ is θ j After normalization, θ j-max Segment IU j The maximum pressure in historical monitoring. ┌┐ indicates rounding up.

7. The method for the intelligent pressure regulation system for butterfly valves according to claim 4, characterized in that: In step S4, set K to be the total opening stroke of the butterfly valve, K max =K / 2, K min =K / 2π.

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