Intelligent pressure adjusting system and method for butterfly valve

Abstract

The invention discloses an intelligent pressure adjusting system for a butterfly valve. The intelligent pressure adjusting system comprises a gas collecting pipe module, a judging module, a risk adjusting module and an opening degree calculating module. The gas collecting pipe module is used for arranging a gas collecting pipe into a plurality of sections, and each section is provided with a sensor and a butterfly valve; the judgment module can judge the high-pressure risk and the low-pressure risk of the gas collecting pipes: when only the gas collecting pipes with the high-pressure risk or the low-pressure risk exist, the judgment module judges that the system has a one-way risk, and when the gas collecting pipes with the high-pressure risk and the low-pressure risk exist at the same time, the judgment module judges that the system has a two-way risk; the one-way risk module can correspondingly adjust the opening degree of a butterfly valve in a one-way mode when the system has one-way risks. The two-way risk module can conduct one-way risk adjustment for multiple times when the system has two-way risks, and in each adjustment, the opening degree of the butterfly valve with the higher risk is adjusted according to the risk degree of the high-pressure risk and the risk degree of the low-pressure risk. According to the invention, the instability of complex coupling is optimized and improved.

Description

Technical Field

[0001] This application relates to the technical field of pressure regulation for butterfly valves. Specifically, it relates to an intelligent pressure regulation system and method for butterfly valves. Background Art

[0002] In the coking process, the gas main plays a crucial role. However, its internal pressure is often in a constantly changing state. Especially at the moment of coal charging into the coke oven, the pressure in the gas main will fluctuate significantly. This phenomenon has a significant impact on the safety and efficiency of the coking process. When the pressure in the gas main is too low, outside air will take advantage of the situation and penetrate into the furnace body. This will not only cause the coke to burn, thereby reducing the gas quality, but also trigger serious production accidents if a large amount of air is inhaled into the carbonization chamber and raw gas, bringing huge economic losses and safety hazards to the enterprise. When the pressure in the gas main is too high, the raw gas cannot be effectively recovered but will escape from places with poor sealing such as furnace doors and furnace lids. Since there are many factors affecting the pressure in the gas main and it is difficult to completely overcome them, and there is a relatively complex coupling effect between each adjustment loop, this makes the pressure regulation of the gas main a technical problem in coke oven control. To regulate the pressure, a butterfly valve is generally used in the gas pressure regulation. A circular butterfly plate is used as the opening and closing element, and it rotates with the valve stem to achieve the opening and closing action. The opening degree of the butterfly valve in the pipeline changes linearly with the flow rate, that is, the larger the opening degree of the butterfly valve, the larger the flow rate. In the process of coke oven gas treatment, the butterfly valve is often used to control and adjust the gas flow rate to maintain the stability of the pressure in the gas main. In this way, the system can automatically adjust the opening degree of the butterfly valve in the gas main to achieve the purpose of stabilizing the pressure in the gas main. In the variable coupling coke oven gas main pressure system, how to adjust the gas collection pressure and optimize the coupling fluctuation to the greatest extent in complex situations to achieve a safe and stable effect is an urgent problem to be solved. Summary of the Invention

[0003] An embodiment of this application provides an intelligent pressure regulation system for a butterfly valve, including a gas main module, a judgment module, a risk adjustment module, and an opening calculation module; The gas main module includes several gas mains. The gas mains are set as several segments, and a pressure sensor and a butterfly valve are arranged in each segment. The pressure sensor is used to obtain the pressure on the segment, and the opening degree 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 main through the obtained segment pressure: when there is only a gas main with high-pressure risk or low-pressure risk, it is judged that the system has a one-way risk; when there are gas mains with both high-pressure risk and low-pressure risk at the same time, it is judged that the system has a two-way 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 corresponding one-way adjustment butterfly valve to adjust the pressure when the system has a one-way risk; The two-way risk module can perform several adjustments of one-way risks when the system has two-way risks. In each adjustment, according to the risk levels of the high-pressure risk and the low-pressure risk, it adjusts the opening of the butterfly valve on the side with the higher risk; The opening calculation module can calculate based on the header pipe data, sectional data, and the acquired pressure data, and adjust the opening of the sectional butterfly valve according to the calculation results.

[0004] Among them, preferably, the judgment module obtains the pressure deviation of the header pipe through the acquired sectional pressure; according to the obtained pressure deviation, it judges the risk of the header pipe, adds the header pipes with high-pressure risks to the high-pressure header pipe list, and adds the header pipes with low-pressure risks to the low-pressure header pipe list.

[0005] Among them, preferably, when obtaining the sectional pressure of the header pipe, the measured pressure signal is converted into an electrical signal by the on-site transmitter and then sent to the control platform for arithmetic processing, and the values used for calculation are normalized.

[0006] This application also provides a method for using the pressure intelligent regulation system for butterfly valves as described above, including the following steps: S1, set that the system includes b header pipes JQ, JQ = [JQ1, JQ2, JQ3,..., JQ b , where the i-th header pipe is JQ i , set JQ i to include c sections IU, IU = [IU1, IU2, IU3,..., JQ c , where the j-th section is IU j , set the pressure improvement coefficient of the section IU j to be ρ j , where the pressure improvement coefficient represents the ability of the butterfly valve set in this section to improve the pressure of the header pipe; S2, obtain the pressure value θ j of the section IU j at the first pressure monitoring time T1; Obtain the pressure i of the header pipe JQ at the T1 monitoring time; S3, set the theoretical pressure of the header pipe JQ i to be E0; set the high-pressure differential threshold △E i of the header pipe JQ max , the low-pressure differential threshold △E min； Obtain the header pipe JQ iThe pressure deviation △E1 = E1 - E0; When △E1 ≥ △E max At this time, add the gas collecting pipe JQ i To the high-pressure gas collecting list GL; When △E1 ≤ △E min At this time, add the gas collecting pipe JQ i To the low-pressure gas collecting list DL; S4. Obtain the high-pressure gas collecting list GL and the low-pressure gas collecting list DL at the T1 monitoring time; Set the basic opening degree of the butterfly valve of each segment IU j When adjusted each time to be K0, where the maximum opening degree of the butterfly valve is set to K max , and the minimum opening degree is K min ; When GL = ∅ and DL = ∅, the monitoring step ends; When DL = ∅ and GL ≠ ∅, increase the opening degree of the butterfly valve of the segment of the gas collecting pipe in the high-pressure gas collecting list GL by K1, and loop this step until the butterfly valve reaches the maximum opening degree K max ; Among them, set the number of gas collecting pipes in the high-pressure gas collecting list GL to r1, and the high-pressure gas distribution γ1 = r1 / b, then K1 = ρ j γ1K0; When GL = ∅ and DL ≠ ∅, decrease the opening degree of the butterfly valve of the segment of the gas collecting pipe in the low-pressure gas collecting list DL by K1, and loop this step until the butterfly valve reaches the minimum opening degree K min ; Among them, set the number of gas collecting pipes in the low-pressure gas collecting list DL to r2, and the low-pressure gas distribution γ2 = r2 / b, then K1 = ρ j γ2K0.

[0007] When GL ≠ ∅ and DL ≠ ∅, execute the two-way risk adjustment step: According to the risk levels of the high-pressure gas collecting list GL and the low-pressure gas collecting list DL, perform several adjustments to the one-way risk, and each time adjust the opening degree of the butterfly valve of the party with higher risk.

[0008] Among them, in step S4, when GL ≠ ∅ and DL ≠ ∅, the two-way risk adjustment step includes: S41. Set that the high-pressure gas collecting list GL contains n gas collecting pipes, where the i-th high-pressure gas collecting pipe is JQ i , JQ i The j-th segment of is IU j , IU j The pressure improvement coefficient of is ρ j , where the pressure deviation of the high-pressure gas collecting pipe JQ i Is △E i； Obtain the first high-pressure fraction , where e is the 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 z-th segment of is HU z , HU z The pressure improvement coefficient of is ρ z , where the pressure deviation of the low-pressure gas collection pipe JQ h is △E z ; Obtain the first low-pressure fraction , where e is the natural constant; When GF1 ≥ DF1, increase the butterfly valve opening of the segment of the gas collection pipe JQ i in the high-pressure gas collection list GL by K1, where , go to step S42; When GF1 < DF1, decrease the butterfly valve opening of the segment HU h of the gas collection pipe JQ z in the low-pressure gas collection list DL by K1, where , go to step S43; Step S42: At the a-th pressure monitoring time T a Obtain the high-pressure gas collection list GL, where a > 1, set T a The high-pressure gas collection list GL obtained at the monitoring time includes r1 gas collection pipes, where the pressure deviation of the gas collection pipe JQ i is △E i ', obtain the a-th high-pressure fraction ; When GF a ≥ GF a-1 , go to step S421; When GF a < GF a-1 at this time, go to step S422; Step S43: At the a-th pressure monitoring time T a Obtain the low-pressure gas collection list DL, where a > 1, set T a The low-pressure gas collection list DL at the monitoring time contains r2 gas collection pipes, and the pressure deviation of the gas collection pipe JQ h is △E z ', obtain the a-th low-pressure fraction ; When DF a ≥ DF a-1 , go to step S421; When DF a < DF a-1 at this time, go to step S431; Step S421: Send an exception alarm to the system; Step S422: If GF a ≥DF a-1 , increase the butterfly valve opening K of the section IU of the gas collecting pipe JQ in the high-pressure gas collecting list GL i by K j , a , and transfer to step S42 until the butterfly valve reaches the maximum opening K max； If GF a <DF a-1 , decrease the butterfly valve opening K of the section HU of the gas collecting pipe JQ in the low-pressure gas collecting list DL h by K z a , a , and transfer to step S42 until the butterfly valve reaches the minimum opening K min ; Step S431: If DF a ≥GF a-1 , decrease the butterfly valve opening K of the section HU of the gas collecting pipe JQ in the low-pressure gas collecting list DL h by K z a , a , and transfer to step S43 until the butterfly valve reaches the minimum opening K min ; If DF a <GF a-1 , increase the butterfly valve opening K of the section IU of the gas collecting pipe JQ in the high-pressure gas collecting list GL i by K i a , a , and transfer to step S43 until the butterfly valve reaches the maximum opening K max .

[0009] Among them, in step S2, when obtaining the sectional pressure value of the gas collecting pipe, the values used for calculation are normalized. The normalization method is: , where θ j ′ is the value after normalization of θ j , θ j-max is the maximum pressure in the historical monitoring of the section IU j of the gas collecting pipe, and ┌ ┐ represents rounding up.

[0010] Among them, in step S4, set K as the total opening stroke of the butterfly valve, K max = K / 2, K min =K / 2π.

[0011] The beneficial effects achieved by this application are as follows: This application can achieve optimized adjustment of the segmented pressure in the multi-collector pipe mode of multiple coke ovens. This application can judge the risk direction and risk degree of the collector pipe and then give targeted adjustments. Among them, when there are two-way risks in the collector pipe, this application can overcome the complex coupling problem between each adjustment loop, give corresponding strategies, and make optimized adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and the illustrative embodiments and descriptions thereof are used to explain this application and do not constitute an improper limitation to this application. In the drawings: Figure 1 It is a flowchart of the intelligent pressure adjustment method for the butterfly valve of this application.

[0013] Figure 2 It is a flowchart of the two-way risk adjustment step in this application.

[0014] The realization, functional features, and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] This application provides an intelligent collector pipe pressure adjustment system for butterfly valves. This system can be used for automatic adjustment of the segmented pressure in the multi-collector pipe mode of multiple coke ovens. When there are multiple coke ovens in the system, the coke ovens are connected in parallel and there is a negative coupling relationship. The coke ovens are connected in series with the blower and there is a positive coupling relationship. Multiple coke ovens share the air supply and condensation system. The collector pipes of each coke oven are connected in parallel into a main pipe and enter the primary cooler. Therefore, when there is pressure between the collector pipes, complex coupling problems may also occur.

[0017] To overcome the above problems, the intelligent pressure adjustment system for butterfly valves provided by this application includes a collector pipe module, a judgment module, a risk adjustment module, and an opening calculation module; The gas main pipe module includes a pressure sensor for obtaining the pressure of the segmented gas main pipe: there are several gas main pipes in the coke oven system. The gas main pipe includes several segments, and each segment is provided with a pressure sensor and a pneumatic butterfly valve. 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 main pipe through the obtained segment pressure. When there is only a gas main pipe with high-pressure risk or low-pressure risk, the judgment system has a one-way risk. When there are gas main pipes with both high-pressure risk and low-pressure risk at the same time, the judgment system has a two-way 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 correspondingly adjust the opening of the one-way adjustment butterfly valve to adjust the pressure when there is only high-pressure risk or low-pressure risk in the system. The two-way risk module can perform several one-way risk adjustments when there are both high-pressure risk and low-pressure risk in the system. In each one-way adjustment, according to the risk levels of the high-pressure risk and the low-pressure risk, the opening of the butterfly valve on the side with the higher risk is adjusted. The opening calculation module can calculate based on the gas main pipe data, segment data, and the obtained pressure data, and adjust the opening of the segment butterfly valve according to the calculation result.

[0018] Specifically, the system is set to include b gas main pipes JQ, JQ = [JQ1, JQ2, JQ3,..., JQ b , where the i-th gas main pipe is JQ i , set JQ i to include c segments IU, IU = [IU1, IU2, IU3,..., JQ c , where the j-th segment is IU j , set the pressure improvement coefficient of the segment IU j to be ρ j , where the pressure improvement coefficient represents the improvement ability of the butterfly valve set on this segment to the gas main pipe pressure; At the first pressure monitoring time T1, the pressure value θ j of the segment IU j is obtained. Among them, when obtaining the pressure value in the gas main pipe, it is necessary to convert the measured pressure signal into an electrical signal through a field transmitter and then send it to the control platform for arithmetic processing. During the arithmetic processing, due to different gas main pipe conditions during sampling, as well as different sampling times and positions, the magnitudes of the collected signals may be different, which will affect the calculation results. Therefore, the values used for calculation are first normalized, and the specific method is as follows: , where θ j ′ is the value after normalization of θ j , θ j-max is the segment IU jThe maximum pressure in historical monitoring, ┌ ┐ represents rounding up; Obtain the pressure E1 of the gas collecting pipe JQ at the first pressure monitoring time T1 i ; Among them, ; Set the theoretical pressure of the gas collecting pipe JQ i to be E0; Obtain the pressure deviation △E1 = E1 - E of the gas collecting pipe JQ at time T1 i 0； i Set the high pressure difference threshold △E max of the gas collecting pipe JQ min； , and the low pressure difference threshold △E min； When △E1 ≥ △E max , add the gas collecting pipe JQ i to the high-pressure gas collecting list GL, and arrange the high-pressure gas collecting list GL in descending order of pressure deviation; When △E1 ≤ △E min , add the gas collecting pipe JQ i to the low-pressure gas collecting list DL, and arrange the low-pressure gas collecting list DL in ascending order of pressure deviation; Set the basic opening degree of the butterfly valve of the segmented IU j each time it is adjusted to be K0, K is the total opening stroke of the butterfly valve; set the maximum opening degree K max = K / 2, and the minimum opening degree K min = K / 2π; Among them, when both the high-pressure gas collecting list GL and the low-pressure gas collecting list DL are empty, it means that the pressure situation of the gas collecting pipe is stable at this time, and this monitoring step ends.

[0019] When the low-pressure gas collecting list DL is empty and the high-pressure gas collecting list GL is not empty, it means that only high-pressure deviation is generated in the gas collecting pipe at this time, that is, the gas collecting pipes are all in a high-pressure state. At this time, obtain the number r1 of the gas collecting pipes in the high-pressure gas collecting list DL, and get the high-pressure gas collection distribution γ1 = r1 / b. At this time, increase the opening degree of the segmented butterfly valve of the gas collecting pipes in the high-pressure gas collecting list by ρ j γ1K0, and loop this step until the butterfly valve reaches the maximum opening degree K max。

[0020] When the high-pressure gas collecting list GL is empty and the low-pressure gas collecting list DL is not empty, it means that only low-pressure deviation is generated in the gas collecting pipe at this time, that is, the gas collecting pipes are all in a low-pressure state. At this time, obtain the number r2 of the gas collecting pipes in the low-pressure gas collecting list DL, and get the low-pressure gas collection distribution γ2 = r2 / b. Reduce the opening degree of the segmented butterfly valve of the gas collecting pipes in the low-pressure gas collecting list by ρ jγ2 K0, repeat this step until the butterfly valve reaches the minimum opening K min。

[0021] When both the high-pressure gas collection list GL and the low-pressure gas collection list DL are not empty, it indicates that the gas pipe pressures in the system are high and low at this time. Considering that when adjusting the pressure of a single gas pipe, it will have the opposite effect on other gas pipes. To minimize these opposite adjustment effects, the adjustment method is set as follows: Specifically, set the high-pressure gas collection list GL to contain n gas pipes, where the i-th high-pressure gas pipe is JQ i , JQ i The j-th segment of is IU j , IU j The pressure improvement coefficient of is ρ j , where the high-pressure gas pipe JQ i The pressure deviation of is △E i ; Obtain the first high-pressure fraction , where e is the natural constant; Set the low-pressure gas collection list DL to contain m gas pipes, where the h-th low-pressure gas pipe is JQ h , JQ h The z-th segment of is HU z , HU z The pressure improvement coefficient of is ρ z , where the low-pressure gas pipe JQ h The pressure deviation of is △E z； Obtain the first low-pressure fraction , where e is the natural constant; When GF1 > DF1, it is determined that the high-pressure risk is relatively large at this time. Therefore, first increase the butterfly valve opening of the segment of the gas pipe JQ in the high-pressure gas collection list GL to i ; ; After adjusting the butterfly valve opening of the segment IU j , obtain the high-pressure gas collection list GL again at the second pressure monitoring time T2. Set the high-pressure gas collection list GL to contain r1 gas pipes at this time, and adjust the pressure deviation of the gas pipe JQ i to △E i ', and obtain the second high-pressure fraction where the interval between T2 and T1 is the first monitoring period △T1, T2 = T1 + △T1, and △T1 ∈ [5s, 12s]; When GF2 ≥ GF1, it indicates that the system is likely to have an abnormal fault, and an alarm is sent to the system; When GF2 < GF1, proceed to the following steps: If GF2 ≥ DF1, that is to say, the high-pressure risk is still relatively high. At this time, the sectional pipe IU i of the gas collecting pipe JQ in the high-pressure gas collecting list GL j has its butterfly valve opening adjusted again to , and this step is repeated until the butterfly valve reaches the maximum opening K max , and then it is maintained at the maximum stroke opening K max ; If GF2 < DF1, at this time the high-pressure risk decreases and the low-pressure risk increases. At this time, the sectional pipe HU h of the gas collecting pipe JQ in the low-pressure gas collecting list DL z has its butterfly valve opening adjusted to , and this step is repeated until the butterfly valve reaches the minimum opening K min , and then it is maintained at the minimum stroke opening K min ; When GF1 < DF1, at this time the low-pressure risk is relatively high. Therefore, first, the sectional pipe HU h of the gas collecting pipe JQ in the low-pressure gas collecting list DL z has its butterfly valve opening adjusted to ; After adjusting the butterfly valve opening of the sectional pipe HU z , the low-pressure gas collecting list DL is obtained again at the second pressure monitoring time T2. It is set that the low-pressure gas collecting list DL contains r2 gas collecting pipes at this time, and the pressure deviation of the gas collecting pipe JQ h is adjusted to △E z ', and the second low-pressure score is obtained. When DF2 ≥ DF1, it indicates that the system is likely to have an abnormal failure, and an alarm is sent to the system; When DF2 < DF1, the following steps are entered: If DF2 ≥ GF1, that is to say, the low-pressure risk is still relatively high. At this time, the sectional pipe HU h of the gas collecting pipe JQ in the low-pressure gas collecting list DL z has its butterfly valve opening adjusted again to , and this step is repeated until the butterfly valve reaches the minimum opening K min , and then it is maintained at the minimum opening K min ; When DF2 < GF1, at this time the low-pressure risk decreases and the high-pressure risk increases. At this time, the sectional pipe IU i of the gas collecting pipe JQ in the high-pressure gas collecting list GL i has its butterfly valve opening adjusted to , and this step is repeated until the butterfly valve reaches the maximum opening K max , and then it is maintained at the maximum stroke opening K max ; Specifically, in one embodiment, it is set in a system composed of two coke ovens. The four gas collecting pipes JQ1, JQ2, JQ3, and JQ4 of the two coke ovens are connected and communicated. Each gas collecting pipe converges to the main gas collecting pipe in front of the primary cooler, flows through the gas-liquid separator, the primary cooler, and the blower, and then is sent by the blower to the purification and recovery process. After several processes such as desulfurization, ammonium sulfate, final cooling and benzene washing, it is sent out in two ways: one way is to send the gas out; the other way is to send the gas back to the furnace for coking in the coke oven. According to the process principle of coking and chemical product recovery, it is required that the pressure of the coke oven gas collecting pipe should be maintained within the range of 80-120 Pa. However, the pressure of the gas collecting pipe will continuously change during coking, coal charging, and switching heating operations. Therefore, during the above operations where the pressure changes, the pressure data of the gas collecting pipe are collected. The four gas collecting pipes respectively include 2 segments to be pressure-adjusted: namely JQ 1-1 ,JQ 1-2 ,JQ 2-1 ,JQ 2-2 ,JQ 3-1 ,JQ 3-2 ,JQ 4-1 ,JQ 4-2 ,and the corresponding pressure improvement coefficients are 2.0, 1.8, 1.8, 1.8, 1.7, 1.6, 1.9. Pressure sensors and start butterfly valves are set on each segment. At the first monitoring time 10:30:00 after the switching heating operation, the pressure values of all segments are obtained, which are 180 Pa, 200 Pa, 60 Pa, 60 Pa, 80 Pa, 70 Pa, 100 Pa, 110 Pa respectively; it is known that the process requires the pressure range of the gas collecting pipe to be 80-120 Pa; the pressure deviation of the segment is obtained, and after numerical normalization, it is 0.4, 0.3, -0.2, -0.2, -0.1, 0.0, 0.0, 0.0.

[0022] The pressure deviations of the gas collecting pipes JQ1, JQ2, JQ3, and JQ4 are 0.7, -0.4, -0.1, 0; JQ1 is added to the high-pressure gas collecting list GL, and the gas collecting pipes JQ2 and JQ3 are added to the low-pressure gas collecting list DL.

[0023] At this time, GL = [JQ1], DL = [JQ3, JQ2]; The first high-pressure fraction GF1 = 0.7²ln(e + 1) = 0.49×1.3 = 0.637‬; The first low-pressure fraction DF1 = [(-0.4)² + (-0.1)²]ln(e + 2) / 2 = 0.26×1.55 = 0.403; At this time, GF1 > DF1, and it is judged that the high-pressure risk is relatively large at this time. The segment butterfly valve of GL = [JQ1] is adjusted larger, taking JQ 1-1 as an example, JQ 1-1The opening of the butterfly valve is increased. K1 = (1.8×1×0.7) K0 / (4×0.4) = 0.8 K0; After adjusting the opening of the butterfly valve, at the second monitoring time 10:30:20, the high-pressure gas collection list GL = [JQ1] is obtained again, and the pressure deviation △E i ’ is adjusted to 0.5, and the second high-pressure fraction GF2 = 0.5²ln(e + 1) = 0.25×1.3 = 0.325; At this time, GF2 < GF1; GF2 < DF1; at this time, the high-pressure risk is reduced and the low-pressure risk is increased; the opening of the butterfly valve in the low-pressure gas collection list DL[JQ3, JQ2] is reduced. Taking JQ 3-1 as an example, the opening is reduced. K2 = (0.1 + 0.5) K1 / 0.5 = 1.2 K 1。

[0024] Furthermore, the present invention also provides a computer-readable storage medium, which includes a stored program. Among them, when the program runs, it executes the method described in the above method embodiment.

[0025] Furthermore, the present invention also provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to execute the method described in the above method embodiment through the computer program.

[0026] Furthermore, it should be understood that since the settings of each module are only for explaining the functional units of the device of the present invention, the physical devices corresponding to these modules can be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only illustrative.

[0027] Those skilled in the art can understand that all or part of the processes in the methods of the above embodiments of the present invention can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable storage medium can include: any entity or device, medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal, and software distribution medium that can carry the computer program code, etc.

[0028] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes 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 screen or an electronic ink display screen. The input device of the computer device may be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the outer shell of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0029] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A pressure intelligent regulation system for a butterfly valve, the butterfly valve being arranged on a section of a gas collecting pipe to be pressure-regulated, characterized in that, It includes a gas main pipe module, a judgment module, a risk adjustment module, and an opening calculation module; The gas main pipe module can obtain the pressures of all segments of the gas main pipe, including several gas main pipes. The gas main pipe is set as 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 main pipe through the obtained segment pressures. Among them, when there is only a gas main pipe with high-pressure risk or low-pressure risk, the judgment system has a one-way risk. When there are gas main pipes with both high-pressure risk and low-pressure risk at the same time, the judgment system has a two-way 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, when the system has a one-way risk, correspondingly adjust the opening of the one-way adjustment butterfly valve to adjust the segment pressure; The two-way risk module can, when the system has a two-way risk, perform several adjustments of one-way risk. In each adjustment, according to the risk levels of the high-pressure risk and the low-pressure risk, adjust the opening of the butterfly valve of the party with a higher risk; The opening calculation module can calculate based on the gas main pipe data, segment data, and the obtained pressure data, and adjust the opening of the butterfly valve on the segment according to the calculation result.

2. The pressure intelligent regulation system for a butterfly valve according to claim 1, wherein The judgment module obtains the pressure deviation of the gas main pipe through the obtained segment pressures; according to the obtained pressure deviation, judges the risk of the gas main pipe, adds the gas main pipes with high-pressure risk to the high-pressure gas collection list, and adds the gas main pipes with low-pressure risk to the low-pressure gas collection list.

3. The pressure intelligent regulation system for a butterfly valve as described in claim 1, characterized in that, When obtaining the segment pressure of the gas main pipe, the measured pressure signal is converted into an electrical signal by the on-site transmitter and then sent to the control platform for arithmetic processing, and the values used for calculation are normalized.

4. A method of using the pressure intelligent regulation system for a butterfly valve as described in any one of claims 1-3, characterized in that, It includes the following steps: S1. Set the system to include b gas collecting pipes JQ, JQ = [JQ1, JQ2, JQ3, …, JQ b , where the i-th gas collecting pipe is JQ i . Set JQ i to include c segments IU, IU = [IU1, IU2, IU3, …, JQ c , where the j-th segment is IU j . Set the pressure improvement coefficient of the segment IU j to be ρ j . Among them, the pressure improvement coefficient represents the improvement ability of the butterfly valve set in this segment on the pressure of the gas collecting pipe; S2, obtain the segmented IU j pressure value θ j ; Obtain the pressure of the gas collecting pipe JQ in the T1 monitoring time set i Pressure ; S3, set the theoretical pressure of the collecting pipe JQ to E0; set the high differential pressure threshold △E of the collecting pipe JQ i ; set the low differential pressure threshold △E of the collecting pipe JQ i ; max ; min ; Obtain the pressure deviation △E1 = E1 - E0 of the T1 monitoring time collecting pipe JQ i ; When △E1 ≥ △E max the gas collecting pipe JQ i is added to the high-pressure gas collecting list GL; When △E1 ≤ △E min the gas collecting pipe JQ i is added to the low-pressure gas collection list DL; S4. Obtain the high-pressure gas collection list GL and the low-pressure gas collection list DL at the monitoring time T1; Set segmented IU j The basic opening of the butterfly valve j during each adjustment is K0, where the maximum opening of the butterfly valve is set to K max , and the minimum opening is K min ; When GL = ∅ and DL = ∅, the monitoring step ends; When DL = ∅ and GL ≠ ∅, increase the opening degree of the butterfly valve in the segmented gas collecting pipe in the high-pressure gas collecting list GL by K1, and loop this step until the butterfly valve reaches the maximum opening degree K max ; Among them, the number of gas collecting pipes in the high-pressure gas collecting list GL is set to r1, and the high-pressure gas collecting distribution γ1 = r1 / b, then K1 = ρ j γ1K0; When GL = ∅ and DL ≠ ∅, reduce the opening of the butterfly valve in the segmented gas collecting pipe in the low-pressure gas collecting list DL by K1, and loop this step until the butterfly valve reaches the minimum opening K min ; Among them, 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; When GL ≠ ∅ and DL ≠ ∅, execute the two-way risk adjustment step: According to the risk levels of the high-pressure gas collection list GL and the low-pressure gas collection list DL, perform several adjustments of one-way risk, and adjust the opening of the butterfly valve of the party with a higher risk each time.

5. The method of the pressure intelligent regulation system for a butterfly valve according to claim 4, characterized in that, In step S4, when GL ≠ ∅ and DL ≠ ∅, the two-way risk adjustment step includes: S41, set the high-pressure gas collection list GL to contain n gas collection pipes, where the i-th high-pressure gas collection pipe is JQ i , JQ i The j-th segment of is IU j , IU j The pressure improvement coefficient of is ρ j , where the high-pressure gas collection pipe JQ i The pressure deviation of is △E i ; Obtain the first high-pressure fraction , where e is the natural constant; Set the low-pressure gas collection list DL to contain m gas collectors, where the h-th low-pressure gas collector is JQ h , JQ h The z-th segment of is HU z , HU z The pressure improvement coefficient of is ρ z , where the low-pressure gas collector JQ h The pressure deviation of is △E z ; Obtain the first low-pressure fraction , where e is the natural constant; When GF1 ≥ DF1, the butterfly valve opening of the segmented pipe of the gas collecting pipe JQ in the high-pressure gas collecting list GL is adjusted to be larger by K1, where i , and then step S42 is entered; ​ When GF1 < DF1, the sectionalization HU h of the gas collecting pipe JQ in the low-pressure gas collecting list DL z has its butterfly valve opening adjusted smaller by K1, where , and it proceeds to step S43; Step S42, at the a-th pressure monitoring time T a Obtain the high-pressure gas collection list GL, where a > 1, and set T a The high-pressure gas collection list GL obtained at the monitoring time includes r1 gas collection pipes. Among them, the pressure deviation of the gas collection pipe JQ i is △E i ', to obtain the a-th high-pressure fraction ; When GF a ≥ GF a-1 , go to step S421; When GF a <GF a-1 , go to step S422; Step S43: At the a-th pressure monitoring time T a Obtain the low-pressure gas collection list DL, where a > 1, and set T a The low-pressure gas collection list DL at the monitoring time contains r2 gas collection pipes, and the pressure deviation of the gas collection pipe JQ h is △E z ', to obtain the a-th low-pressure fraction ; When DF a ≥ DF a-1 , go to step S421; When DF a <DF a-1 At this time, transfer to step S431; Step S421: Send an abnormal alarm to the system; Step S422: If GF a ≥DF a-1 , increase the butterfly valve opening K of the segmented IU of the gas collecting pipe JQ in the high-pressure gas collecting list GL i by K j , a , , and transfer to step S42 until the butterfly valve reaches the maximum opening K max ; If GF a <DF a-1 , the butterfly valve opening of the segmented HU h of the gas collecting pipe JQ in the low-pressure gas collecting list DL h is adjusted smaller by K z , a , , go to step S42 until the butterfly valve reaches the minimum opening K min ; Step S431: If DF a ≥GF a-1 , the butterfly valve opening of the segmented HU h of the gas collecting pipe JQ in the low-pressure gas collecting list DL z is adjusted smaller by K a , , transfer to step S43 until the butterfly valve reaches the minimum opening K min ; If DF a <GF a-1 , the butterfly valve opening of the segmented IU i of the gas collecting pipe JQ in the high-pressure gas collecting list GL i is adjusted to be larger by K a , , go to step S43 until the butterfly valve reaches the maximum opening K max .

6. The method of the pressure intelligent regulation system for a butterfly valve according to claim 4, wherein In step S2, when obtaining the segment pressure value of the gas main pipe, normalize the values used for calculation. The normalization method is: , where θ j ' is the value of θ j after normalization, and θ j-max is the maximum pressure in the historical monitoring of the segmented IU j , and ┌ ┐ represents rounding up.

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

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