Drainage pipe network resistance coefficient determination method and device, electronic equipment and medium

Abstract

The invention relates to a drainage pipe network resistance coefficient determination method and device, electronic equipment and a medium, and the method comprises the steps: obtaining the pipeline length of each pipe section of a drainage pipe network and the resistance query value of each pipe fitting, calculating the on-way resistance of each pipe section according to the pipeline length of each pipe section, and determining the resistance coefficient of each pipe fitting according to the resistance query value of each pipe fitting. Calculating the local resistance of each pipe fitting, determining the resistance coefficient of the drainage pipe network according to the on-way resistance of each pipe section and the local resistance of each pipe fitting, calculating the maximum value and the minimum value of the resistance coefficient, and determining the drainage pipe network on the basis of the maximum value and the minimum value of the resistance coefficient. Determining the resistance coefficient range of the drainage pipe network. Compared with the prior art, the resistance coefficient and the resistance coefficient range of the drainage pipe network can be reasonably and reliably determined, the accuracy of determining the resistance coefficient of the drainage pipe network can be improved, and the risk that the actually measured resistance breaks through the designed resistance coefficient range is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of pipe network design, and particularly relates to a method and device for determining a resistance coefficient of a drainage pipe network, an electronic device and a medium. BACKGROUND

[0002] In the design of a drainage pipe network system, the resistance coefficient of the pipe network system is one of important hydraulic characteristics. The system resistance coefficient contains the frictional resistance and the local resistance of the pipe, wherein the local resistance includes the resistance of pipe fittings such as elbows, tees, reducers, orifice plates and valves. The passive nuclear power plant adopts passive safety systems to relieve accidents, and the passive safety systems do not rely on the driving force provided by active equipment components such as pumps and fans, but rely on natural driving forces such as density difference and gravity. Therefore, compared with the active safety system, the driving force of the passive safety system is much smaller, and the resistance of the pipe network system is much more sensitive.

[0003] In the related art, the resistance of the pipe network of the passive safety system needs to be tested to ensure that the actual measured value of the resistance coefficient of the pipe network system falls within the uncertainty range (i.e. the resistance coefficient range) of the design value, otherwise the pipe network system needs to be reformed in hardware, or even the related accident analysis and the modification of the safety analysis report need to be carried out, which has a large influence and a high degree of influence. Therefore, when designing the drainage pipe network system, a reasonable method is needed to calculate the resistance coefficient and the resistance coefficient range of the pipe network system. SUMMARY

[0004] To solve the above technical problems, the present disclosure provides a method and device for determining a resistance coefficient of a drainage pipe network, an electronic device and a medium to reasonably and reliably determine the resistance coefficient and the resistance coefficient range of the drainage pipe network.

[0005] In a first aspect, the present disclosure provides a method for determining a resistance coefficient of a drainage pipe network, the method comprising: obtaining pipe lengths of each pipe section of the drainage pipe network and resistance query values of each pipe fitting; calculating the frictional resistance of each pipe section according to the pipe lengths of the pipe sections; calculating the local resistance of each pipe fitting according to the resistance query values of the pipe fittings; determining the resistance coefficient of the drainage pipe network according to the frictional resistance of each pipe section and the local resistance of each pipe fitting; calculating the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, and determining the resistance coefficient range of the drainage pipe network based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient.

[0006] In some embodiments, the calculation of the frictional resistance of each pipe section according to the pipe lengths of the pipe sections comprises: The Darcy friction factor is calculated by using the Karman relation in turbulent flow state. The frictional resistance of each pipe section is calculated according to the pipe length, the pipe area, the pipe equivalent diameter and the Darcy friction factor of each pipe section.

[0007] In some embodiments, the calculation of the frictional resistance of each pipe section according to the pipe length of each pipe section comprises: The frictional resistance of each pipe section is calculated by using the following first formula:

[0008]

[0009] wherein R wall represents the frictional resistance, A is the pipe area, g is the acceleration of gravity, L is the pipe length, D is the pipe equivalent diameter, f is the Darcy friction factor, is the surface roughness.

[0010] In some embodiments, the calculation of the local resistance of each pipe fitting according to the resistance query value of each pipe fitting comprises: The local resistance of each pipe fitting is calculated by using the following second formula:

[0011] wherein R local represents the local resistance, K is the resistance query value, B is the flow area corresponding to K, and g is the acceleration of gravity.

[0012] In some embodiments, the determination of the resistance coefficient of the drainage pipe network according to the frictional resistance of each pipe section and the local resistance of each pipe fitting comprises: The frictional resistance of each pipe section and the local resistance of each pipe fitting are calculated simultaneously according to the arrangement of the drainage pipe network to obtain the resistance coefficient of the drainage pipe network.

[0013] In some embodiments, the calculation of the maximum value of the resistance coefficient comprises: The maximum frictional resistance of each pipe section is calculated by using the first proportional value of the pipe length of each pipe section; The maximum local resistance of each pipe fitting is calculated by using the second proportional value of the resistance query value of each pipe fitting; The maximum value of the resistance coefficient of the drainage pipe network is determined according to the maximum frictional resistance of each pipe section and the maximum local resistance of each pipe fitting.

[0014] In some embodiments, the calculation of the minimum value of the resistance coefficient comprises: a third proportional value of the pipe lengths of the pipe sections is adopted to calculate the minimum frictional resistance of each pipe section; a fourth proportional value of the resistance query values of the pipe fittings is adopted to calculate the minimum local resistance of each pipe fitting; According to the minimum frictional resistance of each pipe section and the minimum local resistance of each pipe fitting, the minimum value of the resistance coefficient of the drainage pipe network is determined.

[0015] In a second aspect, the embodiments of the present disclosure provide a drainage pipe network resistance coefficient determination device, and the device comprises: An acquisition module is configured to acquire pipe lengths of each pipe section of a drainage pipe network and resistance query values of each pipe fitting; A first calculation module is configured to calculate the frictional resistance of each pipe section according to the pipe lengths of the pipe sections; A second calculation module is configured to calculate the local resistance of each pipe fitting according to the resistance query values of the pipe fittings; A first determination module is configured to determine the resistance coefficient of the drainage pipe network according to the frictional resistance of each pipe section and the local resistance of each pipe fitting; A second determination module is configured to calculate the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, and determine the resistance coefficient range of the drainage pipe network based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient.

[0016] In a third aspect, the embodiments of the present disclosure provide an electronic device, which comprises: a memory; a processor; and a computer program; The computer program is stored in the memory and configured to be executed by the processor to implement the method of the first aspect.

[0017] In a fourth aspect, the embodiments of the present disclosure provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method of the first aspect.

[0018] In a fifth aspect, the embodiments of the present disclosure further provide a computer program product, which comprises a computer program or instructions, and the computer program or instructions are executed by a processor to implement the method of the first aspect.

[0019] The drainage network resistance coefficient determination method, apparatus, electronic device, and medium provided in this disclosure are achieved by acquiring the pipe length of each pipe segment and the resistance lookup value of each pipe fitting in the drainage network. The friction resistance of each pipe segment is calculated based on its length, and the local resistance of each pipe fitting is calculated based on its resistance lookup value. The resistance coefficient of the drainage network is determined based on the friction resistance of each pipe segment and the local resistance of each pipe fitting. The maximum and minimum values ​​of the resistance coefficient are calculated, and the range of the resistance coefficient of the drainage network is determined based on these values. Compared to existing technologies, this disclosure is applicable to the calculation of the resistance coefficient and its range in drainage networks, enabling a reasonable and reliable determination of the resistance coefficient and its range. This improves the accuracy of the determination of the drainage network resistance coefficient and reduces the risk of measured resistance exceeding the design resistance coefficient range. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A flowchart of a method for determining the resistance coefficient of a drainage pipe network provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the overall process of the method for determining the resistance coefficient of a drainage pipe network provided in an embodiment of this disclosure; Figure 3 A flowchart of a method for determining the resistance coefficient of a drainage pipe network provided in another embodiment of this disclosure; Figure 4 A schematic diagram of the structure of the drainage network resistance coefficient determination device provided in the embodiments of this disclosure; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a thorough understanding of the present disclosure. However, the present disclosure can be practiced according to other embodiments that can not be described in detail herein; and, obviously, many modifications and variations of the embodiments described herein can be made in light of the above teachings. It is therefore to be understood that the embodiments described herein are merely examples of the present disclosure and are not meant to be limiting.

[0025] In the design of the drainage pipe network system, the resistance coefficient of the pipe network system is one of the important hydraulic characteristics. The system resistance coefficient contains the resistance along the pipeline and the local resistance, wherein the local resistance includes the bends, tees, reducers, orifice plates and valves and other pipeline fittings. The passive nuclear power plant adopts passive safety system to relieve the accident, and the passive safety system does not rely on the driving force provided by the active equipment components such as pumps and fans, but relies on the natural driving force such as density difference and gravity. Therefore, compared with the active safety system, the driving force of the passive safety system is much smaller, and the resistance of the pipe network system is much more sensitive.

[0026] In the related art, the resistance of the pipe network of the passive safety system needs to be tested to ensure that the actual measured value of the resistance coefficient of the pipe network system falls within the uncertainty range (i.e. the resistance coefficient range) of the design value, otherwise the hardware of the pipe network system needs to be modified, and even the related accident analysis and the modification of the safety analysis report need to be carried out, which has a large influence and a large degree of influence. Therefore, when designing the drainage pipe network system, a reasonable method is needed to calculate the resistance coefficient and the resistance coefficient range of the pipe network system.

[0027] To solve the problem, the present embodiment provides a drainage pipe network resistance coefficient determination method, which will be introduced below in combination with specific embodiments.

[0028] Figure 1 A drainage pipe network resistance coefficient determination method flowchart is provided for the present embodiment, which can be applied to electronic devices such as tablet computers, notebook computers and other portable mobile devices; or personal computers, servers and other fixed devices, wherein the server can be a single server, a server cluster, which can be a distributed cluster or a centralized cluster. The method can be applied to the scene of determining the resistance coefficient of the drainage pipe network, and can be suitable for calculating the resistance coefficient and the resistance coefficient range of the drainage pipe network, and can reasonably and reliably determine the resistance coefficient and the resistance coefficient range of the drainage pipe network, which can improve the accuracy of the determination of the resistance coefficient of the drainage pipe network and reduce the risk of the actual resistance breaking through the design resistance coefficient range. It can be understood that the drainage pipe network resistance coefficient determination method provided by the present embodiment can also be applied in other scenes.

[0029] The drainage pipe network resistance coefficient determination method shown in the above will be introduced below, which includes the following steps: Figure 1 The drainage pipe network resistance coefficient determination method shown in the above will be introduced below, which includes the following steps: S101, obtain pipe lengths of each pipe section of the drainage pipe network and resistance query values of each pipe fitting.

[0030] In this step, the electronic device obtains the pipe lengths of each pipe section of the drainage pipe network and the resistance query values of each pipe fitting. In some embodiments, the design length of each pipe section can be taken as the pipe length of each pipe section. Optionally, the resistance query values of each pipe fitting can be obtained from a relevant resistance manual, and the resistance query values are target coefficients based on flow area.

[0031] S102, calculate the frictional resistance of each pipe section according to the pipe length of each pipe section.

[0032] In this step, after obtaining the pipe length of each pipe section, the electronic device calculates the frictional resistance of each pipe section according to the pipe length of each pipe section. As shown in the formula (1), the frictional resistance of each pipe section is calculated. Figure 2

[0033] In some embodiments, S102 can include but is not limited to S1021 and S1022. S1021, calculate the Darcy friction factor by using the Karman relationship formula in the turbulent flow state; The frictional resistance can be divided into laminar flow region, transition region and fully rough turbulent flow region according to different flow states. Since the flow in the pipe is generally in a strong turbulent state in industry, the Karman relationship formula in the turbulent flow state is used to calculate the Darcy friction factor, that is, the Karman relationship formula for fully rough turbulent flow region is selected to calculate the Darcy friction factor f.

[0034] S1022, calculate the frictional resistance of each pipe section according to the pipe length, pipe area, pipe equivalent diameter and Darcy friction factor of each pipe section.

[0035] In some embodiments, the calculation of the frictional resistance of each pipe section according to the pipe length of each pipe section includes: The frictional resistance of each pipe section is calculated by the following first formula:

[0036]

[0037] wherein R wall represents the frictional resistance, A is the pipe area, g is the acceleration of gravity, L is the pipe length, D is the pipe equivalent diameter, f is the Darcy friction factor, is the surface roughness.

[0038] S103, calculate the local resistance of each pipe fitting according to the resistance query value of each pipe fitting.

[0039] ​In this step, after obtaining the resistance query value of each pipe fitting, the electronic device can calculate the local resistance of each pipe fitting according to the resistance query value of each pipe fitting. The pipe fitting is a resistance piece, such as Figure 2 As shown in the figure, the local resistance of each resistance piece is calculated.

[0040] In some embodiments, the calculation of the local resistance of each pipe fitting according to the resistance query value of each pipe fitting comprises: The local resistance of each pipe fitting is calculated by the following second formula:

[0041] Wherein, R local represents the local resistance, K is the resistance query value, B is the flow area corresponding to K, and g is the acceleration of gravity.

[0042] S104, according to the resistance of each pipe section and the local resistance of each pipe fitting, the resistance coefficient of the drainage pipe network is determined.

[0043] In this step, the electronic device can determine the resistance coefficient of the drainage pipe network according to the resistance of each pipe section and the local resistance of each pipe fitting, which can reasonably and reliably determine the resistance coefficient of the drainage pipe network. As shown in the figure, the optimal estimated value of the system resistance is calculated, and the optimal estimated value is the resistance coefficient of the drainage pipe network. Figure 2

[0044] S105, the maximum value of the resistance coefficient and the minimum value of the resistance coefficient are calculated, and the resistance coefficient range of the drainage pipe network is determined based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient.

[0045] In this step, the electronic device can calculate the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, and further, based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, the resistance coefficient range of the drainage pipe network is determined, which can reasonably and reliably determine the resistance coefficient range of the drainage pipe network.

[0046] ​This disclosure embodiment obtains the pipe length of each pipe segment of the drainage pipe network and the resistance lookup value of each pipe fitting. Based on the pipe length of each segment, the friction resistance is calculated. Based on the resistance lookup value of each pipe fitting, the local resistance of each pipe fitting is calculated. Based on the friction resistance of each pipe segment and the local resistance of each pipe fitting, the resistance coefficient of the drainage pipe network is determined. The maximum and minimum values ​​of the resistance coefficient are calculated. Based on the maximum and minimum values ​​of the resistance coefficient, the range of the resistance coefficient of the drainage pipe network is determined. Compared with the prior art, this disclosure embodiment is applicable to the calculation of the resistance coefficient and resistance coefficient range of drainage pipe networks, and can reasonably and reliably determine the resistance coefficient and resistance coefficient range of the drainage pipe network. This can improve the accuracy of the determination of the resistance coefficient of the drainage pipe network and reduce the risk of the measured resistance exceeding the design resistance coefficient range.

[0047] Figure 3 A flowchart of a method for determining the resistance coefficient of a drainage pipe network provided in another embodiment of this disclosure is shown below. Figure 3 As shown, the method includes the following steps: S301. Obtain the pipe length of each pipe section of the drainage network and the resistance query value of each pipe fitting.

[0048] Specifically, the implementation process and principle of S301 and S101 are the same, and will not be repeated here.

[0049] S302. Calculate the friction resistance of each pipe segment based on the pipe length of each segment.

[0050] Specifically, the implementation process and principle of S302 and S102 are the same, and will not be repeated here.

[0051] S303. Calculate the local resistance of each pipe fitting based on the resistance lookup value of each pipe fitting.

[0052] Specifically, the implementation process and principle of S303 and S103 are the same, and will not be repeated here.

[0053] S304. Based on the layout of the drainage pipe network, the friction resistance of each pipe section and the local resistance of each pipe fitting are calculated together to obtain the resistance coefficient of the drainage pipe network.

[0054] In this step, such as Figure 2 As shown, the electronic device can perform simultaneous calculations of the friction resistance of each pipe segment and the local resistance of each pipe fitting based on the layout of the drainage network to obtain the resistance coefficient of the drainage network. Optionally, the layout of the drainage network can include series layout, parallel layout, and mixed series-parallel layout, which is not specifically limited here.

[0055] In some embodiments, when the pipes are arranged in series, the simultaneous calculation is: the on-line resistance R wall and the local resistance R local of each pipe fitting is calculated by arithmetic accumulation to obtain the total resistance of the drainage network, i.e. the resistance coefficient R total of the drainage network. In some embodiments, when the pipes are arranged in parallel, the simultaneous calculation is: the resistance value of each parallel branch is calculated respectively; and the harmonic mean of the resistance values of each branch is taken as the total resistance R total of the system. In some embodiments, when the pipes are arranged in series-parallel mixed mode, the simultaneous calculation is: the resistance value of each series segment is calculated first; then the resistance value of each parallel segment is calculated; finally, the resistance values of each part are combined according to the actual connection relationship to obtain the total resistance R total .

[0056] In some embodiments, Figure 3 the step S304 shown can be a specific implementation of the step S104 shown. Figure 1 .

[0057] S305, using the first proportion value of the pipe length of each pipe segment, to calculate the maximum on-line resistance of each pipe segment.

[0058] In this step, the electronic device will use the first proportion value of the pipe length of each pipe segment to calculate the maximum on-line resistance of each pipe segment. Specifically, as shown in Figure 2 , the first proportion value is 90%, and the 90% of the pipe length of each pipe segment is used to calculate the maximum on-line resistance of each pipe segment. Specifically, when calculating the maximum on-line resistance of each pipe segment, the pipe length L is set to be 90% of the obtained pipe length of each pipe segment, and the maximum on-line resistance of each pipe segment is calculated by the first formula. In some embodiments, the maximum on-line resistance of each pipe segment is the product value of the on-line resistance of each pipe segment and the first proportion value.

[0059] S306, using the second proportion value of the resistance query value of each pipe fitting, to calculate the maximum local resistance of each pipe fitting.

[0060] In this step, the electronic device will use the second proportion value of the resistance query value of each pipe fitting to calculate the maximum local resistance of each pipe fitting. Specifically, as shown in Figure 2 , the second proportion value is 90%, and the 90% of the resistance query value of each pipe fitting is used to calculate the maximum local resistance of each pipe fitting. Specifically, when calculating the maximum local resistance of each pipe fitting, the resistance query value of each pipe fitting is set to be 90% of the obtained resistance query value of each pipe fitting, and the maximum local resistance of each pipe fitting is calculated by the second formula. In some embodiments, the maximum local resistance of each pipe fitting is the product value of the local resistance of each pipe fitting and the second proportion value.As shown, the second proportion value is 80%, and the maximum local resistance of each pipe fitting is calculated by using 80% of the resistance query value of each pipe fitting. Specifically, when calculating the maximum local resistance of each pipe fitting, the resistance query value K of each pipe fitting is set to 80% of the resistance query value of each pipe fitting, and the maximum local resistance of each pipe fitting is calculated by the second formula. In some embodiments, the maximum local resistance of each pipe fitting is the product of the local resistance of each pipe fitting and the second proportion value.

[0061] S307, according to the maximum resistance of each pipe segment and the maximum local resistance of each pipe fitting, determine the maximum value of the resistance coefficient of the drainage pipe network.

[0062] In this step, after calculating the maximum resistance of each pipe segment and the maximum local resistance of each pipe fitting, the electronic device will determine the maximum value of the resistance coefficient of the drainage pipe network according to the maximum resistance of each pipe segment and the maximum local resistance of each pipe fitting. Specifically, the maximum value of the resistance coefficient of the drainage pipe network is similar to the determination process of the resistance coefficient of the drainage pipe network, which will not be described here.

[0063] S308, calculate the minimum resistance of each pipe segment by using a third proportion value of the pipe length of each pipe segment.

[0064] In this step, the electronic device will calculate the minimum resistance of each pipe segment by using a third proportion value of the pipe length of each pipe segment. Specifically, as shown in the formula (1), the third proportion value is 110%, and the minimum resistance of each pipe segment is calculated by using 110% of the pipe length of each pipe segment. Specifically, when calculating the minimum resistance of each pipe segment, the pipe length L is set to 110% of the pipe length of each pipe segment, and the minimum resistance of each pipe segment is calculated by the first formula. In some embodiments, the minimum resistance of each pipe segment is the product of the resistance of each pipe segment and the third proportion value. Figure 2

[0065] S309, calculate the minimum local resistance of each pipe fitting by using a fourth proportion value of the resistance query value of each pipe fitting.

[0066] In this step, the electronic device will calculate the minimum local resistance of each pipe fitting by using a fourth proportion value of the resistance query value of each pipe fitting. Specifically, as shown in the formula (2), the fourth proportion value is 80%, and the minimum local resistance of each pipe fitting is calculated by using 80% of the resistance query value of each pipe fitting. Specifically, when calculating the minimum local resistance of each pipe fitting, the resistance query value K of each pipe fitting is set to 80% of the resistance query value of each pipe fitting, and the minimum local resistance of each pipe fitting is calculated by the second formula. In some embodiments, the minimum local resistance of each pipe fitting is the product of the local resistance of each pipe fitting and the fourth proportion value. Figure 2 ​As shown, the fourth proportion value is 120%, and the minimum local resistance of each pipe fitting is calculated by using 120% of the resistance query value of each pipe fitting. Specifically, when calculating the minimum local resistance of each pipe fitting, the resistance query value K of each pipe fitting is set to 120% of the resistance query value of each pipe fitting, and the minimum local resistance of each pipe fitting is calculated by the second formula. In some embodiments, the minimum local resistance of each pipe fitting is the product of the local resistance of each pipe fitting and the fourth proportion value.

[0067] S310, according to the minimum local resistance of each pipe fitting and the minimum local resistance of each pipe fitting, determine the minimum value of the resistance coefficient of the drainage pipe network.

[0068] In this step, after calculating the minimum local resistance of each pipe fitting and the minimum local resistance of each pipe fitting, the electronic device will determine the minimum value of the resistance coefficient of the drainage pipe network according to the minimum local resistance of each pipe fitting and the minimum local resistance of each pipe fitting. Specifically, the minimum value of the resistance coefficient of the drainage pipe network is similar to the determination process of the resistance coefficient of the drainage pipe network, which will not be described here.

[0069] S311, based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, determine the resistance coefficient range of the drainage pipe network.

[0070] The embodiment of the present disclosure obtains the pipe lengths of each pipe section of a drainage pipe network and the resistance query values of each pipe fitting, calculates the along-pipe resistance of each pipe section according to the pipe lengths of the pipe sections, and calculates the local resistance of each pipe fitting according to the resistance query values of the pipe fittings. Further, the along-pipe resistance of each pipe section and the local resistance of each pipe fitting are calculated simultaneously according to the arrangement of the drainage pipe network to obtain the resistance coefficient of the drainage pipe network. Next, a first proportional value of the pipe lengths of each pipe section is used to calculate the maximum along-pipe resistance of each pipe section, a second proportional value of the resistance query values of each pipe fitting is used to calculate the maximum local resistance of each pipe fitting, and the maximum value of the resistance coefficient of the drainage pipe network is determined according to the maximum along-pipe resistance of each pipe section and the maximum local resistance of each pipe fitting; a third proportional value of the pipe lengths of each pipe section is used to calculate the minimum along-pipe resistance of each pipe section, a fourth proportional value of the resistance query values of each pipe fitting is used to calculate the minimum local resistance of each pipe fitting, and the minimum value of the resistance coefficient of the drainage pipe network is determined according to the minimum along-pipe resistance of each pipe section and the minimum local resistance of each pipe fitting. Further, the resistance coefficient range of the drainage pipe network is determined based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient. The method can be applied to the calculation of the resistance coefficient of the drainage pipe network and the resistance coefficient range of the drainage pipe network. Through the method, the uncertainty (±10%) of the pipe length in engineering and the uncertainty (±20%) of the local resistance of the pipe fitting are reasonably considered, and the resistance coefficient of the drainage pipe network and the resistance coefficient range of the drainage pipe network can be reasonably and reliably determined, which can improve the accuracy of the determination of the resistance coefficient of the drainage pipe network and reduce the risk of the measured resistance breaking through the resistance coefficient range.

[0071] Figure 4 A structural schematic diagram of a drainage pipe network resistance coefficient determination apparatus provided by an embodiment of the present disclosure is provided. The drainage pipe network resistance coefficient determination apparatus can be an electronic device as in the above embodiment, or the drainage pipe network resistance coefficient determination apparatus can be a component or assembly in the electronic device. The drainage pipe network resistance coefficient determination apparatus provided by an embodiment of the present disclosure can perform the processing flow provided by the drainage pipe network resistance coefficient determination method embodiment, such as Figure 4As shown, the drainage pipe network resistance coefficient determination device 50 includes: an acquisition module 51, a first calculation module 52, a second calculation module 53, a first determination module 54, and a second determination module 55; wherein, the acquisition module 51 is used to acquire the pipe length of each pipe segment of the drainage pipe network and the resistance query value of each pipe fitting; the first calculation module 52 is used to calculate the friction resistance of each pipe segment based on the pipe length of each pipe segment; the second calculation module 53 is used to calculate the local resistance of each pipe fitting based on the resistance query value of each pipe fitting; the first determination module 54 is used to determine the resistance coefficient of the drainage pipe network based on the friction resistance of each pipe segment and the local resistance of each pipe fitting; the second determination module 55 is used to calculate the maximum value and the minimum value of the resistance coefficient, and determine the range of the resistance coefficient of the drainage pipe network based on the maximum value and the minimum value of the resistance coefficient.

[0072] Optionally, when the first calculation module 52 calculates the friction resistance of each pipe segment based on the pipe length of each pipe segment, it is specifically used to: calculate the Darcy friction factor using the Karman relation in turbulent flow; and calculate the friction resistance of each pipe segment based on the pipe length, pipe area, equivalent pipe diameter, and Darcy friction factor of each pipe segment.

[0073] Optionally, when the first calculation module 52 calculates the friction resistance of each pipe segment based on the pipe length of each segment, it is specifically used to: calculate the friction resistance of each pipe segment using the following first formula:

[0074]

[0075] Among them, R wall Let A represent the pipe area, g be the acceleration due to gravity, L be the pipe length, D be the equivalent pipe diameter, and f be the Darcy friction factor. Surface roughness.

[0076] Optionally, when the second calculation module 53 calculates the local resistance of each pipe fitting based on the resistance lookup value of each pipe fitting, it is specifically used to calculate the local resistance of each pipe fitting using the following second formula:

[0077] Among them, R local This represents local resistance, where K is the resistance lookup value, B is the flow area corresponding to K, and g is the gravitational acceleration.

[0078] Optionally, the first determining module 54 determines the resistance coefficient of the drainage pipe network according to the resistance along the pipe sections and the resistance of the pipe fittings, and specifically is configured to: according to the arrangement of the drainage pipe network, jointly calculate the resistance along the pipe sections and the resistance of the pipe fittings to obtain the resistance coefficient of the drainage pipe network.

[0079] Optionally, the second determining module 55 calculates the maximum value of the resistance coefficient, and specifically is configured to: adopt a first proportional value of the pipe lengths of the pipe sections to calculate the maximum resistance along the pipe sections; adopt a second proportional value of the resistance query values of the pipe fittings to calculate the maximum resistance of the pipe fittings; and determine the maximum value of the resistance coefficient of the drainage pipe network according to the maximum resistance along the pipe sections and the maximum resistance of the pipe fittings.

[0080] Optionally, the second determining module 55 calculates the minimum value of the resistance coefficient, and specifically is configured to: adopt a third proportional value of the pipe lengths of the pipe sections to calculate the minimum resistance along the pipe sections; adopt a fourth proportional value of the resistance query values of the pipe fittings to calculate the minimum resistance of the pipe fittings; and determine the minimum value of the resistance coefficient of the drainage pipe network according to the minimum resistance along the pipe sections and the minimum resistance of the pipe fittings.

[0081] Figure 4 The drainage pipe network resistance coefficient determination apparatus of the embodiment can be used to execute the technical solutions of the method embodiments, and has similar implementation principles and technical effects, which will not be described here.

[0082] Figure 5 The structure of the electronic device provided by the embodiment of the present disclosure is shown. The electronic device provided by the embodiment of the present disclosure can execute the processing flow provided by the drainage pipe network resistance coefficient determination method embodiment, as shown in Figure 5 As shown, the electronic device 80 includes a memory 81, a processor 82, a computer program, and a communication interface 83; wherein the computer program is stored in the memory 81 and is configured to be executed by the processor 82 to implement the drainage pipe network resistance coefficient determination method as described above.

[0083] In addition, the embodiment of the present disclosure also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the drainage pipe network resistance coefficient determination method described in the above embodiments.

[0084] In addition, the embodiment of the present disclosure also provides a computer program product, which includes a computer program or instructions, and the computer program or instructions are executed by a processor to implement the drainage pipe network resistance coefficient determination method as described above.

[0085] It should be noted that the computer-readable medium described in this disclosure can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0086] In some implementations, clients and servers can communicate using any currently known or future-developed network protocol such as HTTP (Hypertext Transfer Protocol) and can interconnect with digital data communication (e.g., communication networks) of any form or medium. Examples of communication networks include local area networks (“LANs”), wide area networks (“WANs”), the Internet (e.g., the Internet of Things), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future-developed networks.

[0087] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.

[0088] The aforementioned computer-readable medium carries one or more programs that, when executed by the electronic device, cause the electronic device to: Obtain the pipe length of each pipe section in the drainage network and the resistance value of each pipe fitting; calculating the resistance along each pipe section according to the pipe length of the pipe section; calculating the local resistance of each pipe fitting according to the resistance lookup value of the pipe fitting; determining the resistance coefficient of the drainage network according to the resistance along each pipe section and the local resistance of each pipe fitting; calculating the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, and determining the resistance coefficient range of the drainage network based on the maximum value of the resistance coefficient and the minimum value of the resistance coefficient.

[0089] In addition, the electronic device can also perform other steps in the drainage network resistance coefficient determination method as described above.

[0090] Computer program code for carrying out operations of the present disclosure can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0091] The flow diagrams and the block diagrams in the drawings are illustrations of architectures, functionalities, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of present disclosure. In this regard, each block in the flow diagrams or block diagrams can represent a module, a procedure, or a part of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in a different order than that noted in the figures. For example, two blocks noted in succession can in fact be executed substantially concurrently or in the opposite order, depending on the functionality involved. It is also noted that each block in the block diagrams and / or flow diagrams, and combinations of blocks in the block diagrams and / or flow diagrams, can be implemented by dedicated hardware-based systems that perform the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0092] The units described in the embodiments of the present disclosure can be implemented by means of software, or by hardware. In some cases, the name of the unit does not constitute a limitation on the unit itself.

[0093] The functions described above in this document can be performed, at least in part, by one or more hardware logic components. For example, and without limitation, illustrative types of hardware logic components that can be used include Field-programmable Gate Arrays (FPGAs), Application-specific Integrated Circuits (ASICs), Application-specific Standard Products (ASSPs), System-on-a-chip systems (SOCs), Complex Programmable Logic Devices (CPLDs), etc.

[0094] In the context of the present disclosure, a machine-readable medium can be a tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0095] It should be noted that, in this document, the terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Also, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, an element defined by the phrase "including a" does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0096] The foregoing is merely illustrative of the various implementations of the present disclosure and the general principles thereof. Numerous modifications can be made to these illustrations, and equivalents can be substituted therefor, without departing from the scope of the present disclosure. The specific embodiments commensurate with the specific application are intended to be illustrative only and not limiting of the scope of the application as set forth in the following claims.

Claims

1. A method of sewer network resistance coefficient determination, characterized in that, The method comprises: obtaining pipe lengths of each pipe section of a drainage pipe network and resistance query values of each pipe fitting; calculating the resistance along the length of each pipe section according to the pipe lengths of the pipe sections; calculating the local resistance of each pipe fitting according to the resistance query values of the pipe fittings; determining the resistance coefficient of the drainage pipe network according to the resistance along the length of each pipe section and the local resistance of each pipe fitting; calculating the maximum value of the resistance coefficient and the minimum value of the resistance coefficient, and determining the resistance coefficient range of the drainage pipe network based on the maximum value and the minimum value of the resistance coefficient.

2. The method of claim 1, wherein, The calculation of the resistance along the length of each pipe section according to the pipe lengths of the pipe sections comprises: calculating the Darcy friction factor by using the Karman relation formula in the turbulent state; calculating the resistance along the length of each pipe section according to the pipe lengths, pipe areas, pipe equivalent diameters and Darcy friction factors of the pipe sections.

3. The method of claim 1, wherein, The calculation of the resistance along the length of each pipe section according to the pipe lengths of the pipe sections comprises: calculating the resistance along the length of each pipe section by using the following first formula: wherein R wall represents the frictional resistance, A is the pipe area, g is the gravitational acceleration, L is the pipe length, D is the pipe equivalent diameter, f is the Darcy friction factor, is the surface roughness.

4. The method of claim 1, wherein, The calculation of the local resistance of each pipe fitting according to the resistance query values of the pipe fittings comprises: calculating the local resistance of each pipe fitting by using the following second formula: wherein R local represents the local resistance, K is the resistance lookup value, B is the flow area corresponding to K, and g is the acceleration of gravity.

5. The method of claim 1, wherein, The determination of the resistance coefficient of the drainage pipe network according to the resistance along the length of each pipe section and the local resistance of each pipe fitting comprises: performing simultaneous calculation of the resistance along the length of each pipe section and the local resistance of each pipe fitting according to the arrangement of the drainage pipe network to obtain the resistance coefficient of the drainage pipe network.

6. The method of claim 1, wherein, The calculation of the maximum value of the resistance coefficient comprises: calculating the maximum resistance along the length of each pipe section by using the first proportional value of the pipe lengths of the pipe sections; calculating the maximum local resistance of each pipe fitting by using the second proportional value of the resistance query values of the pipe fittings; determining the maximum value of the resistance coefficient of the drainage pipe network according to the maximum resistance along the length of each pipe section and the maximum local resistance of each pipe fitting.

7. The method of claim 1, wherein, The calculation of the minimum value of the resistance coefficient comprises: calculating the minimum resistance along the length of each pipe section by using the third proportional value of the pipe lengths of the pipe sections; calculating the minimum local resistance of each pipe fitting by using the fourth proportional value of the resistance query values of the pipe fittings; determining the minimum value of the resistance coefficient of the drainage pipe network according to the minimum resistance along the length of each pipe section and the minimum local resistance of each pipe fitting.

8. A sewer network resistance coefficient determination apparatus characterized by comprising: The device comprises: an obtaining module for obtaining pipe lengths of each pipe section of a drainage pipe network and resistance query values of each pipe fitting; a first calculating module for calculating the resistance along the length of each pipe section according to the pipe lengths of the pipe sections; a second calculating module for calculating the local resistance of each pipe fitting according to the resistance query values of the pipe fittings; a first determining module for determining the resistance coefficient of the drainage pipe network according to the resistance along the length of each pipe section and the local resistance of each pipe fitting; A second determining module is configured to calculate a maximum value of the resistance coefficient and a minimum value of the resistance coefficient, and determine a resistance coefficient range of the sewer network based on the maximum value and the minimum value.

9. An electronic device, comprising: Comprise: a memory; a processor; and a computer program; wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method as claimed in any one of claims 1-7.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by the processor, implements the method as claimed in any one of claims 1-7. The computer program, when executed by the processor, implements the method as claimed in any one of claims 1-7.

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