Pipe diameter optimization method for water inlet pipe of storage tank

Abstract

The invention belongs to the technical field of water environment engineering, and particularly relates to a pipe diameter optimization method for a water inlet pipe of a regulation and storage pond, which comprises the following steps: obtaining rain pattern hydrograph information of a regulation and storage system site selection area; selecting the design type of the regulation and storage system; according to the selected design type of the regulation and storage system, multiple design parameters of the regulation and storage system are determined; according to the multiple design parameters, a rainfall simulation model of the regulation and storage system is established, and the rainfall simulation model comprises a first module and a second module; inputting a plurality of design parameters and rain pattern process line information into the first module, and outputting water inlet flow-time curve information of the regulation and storage system; obtaining constraint conditions of the second module by utilizing the first module according to the multiple design parameters and the water inlet flow-time curve information; the water inlet flow-time curve information and the constraint conditions are input into the second module, and the maximum flow value of the water inlet pipe in the analogue simulation process is output; and obtaining the designed pipe diameter value of the water inlet pipe according to the output maximum flow value.

Description

Technical Field

[0001] The invention belongs to the technical field of water environment engineering, and in particular relates to a method for optimizing the diameter of a water inlet pipe of a regulating reservoir. Background Art

[0002] The regulation and storage system is divided into a combined regulation and storage system and a diversion regulation and storage system according to the drainage system of the setting area. The combined regulation and storage system mainly solves the overflow pollution problem caused by insufficient interception multiples on rainy days. The regulation and storage tank of the combined regulation and storage system is set behind the interception well of the combined regulation and storage system. During rainfall, the combined water in the interception well first enters the sewage treatment plant. After the flow of the combined water entering the interception well exceeds the interception flow of the sewage treatment plant, causing the combined water in the interception well to exceed the amount, the excess combined water in the interception well is introduced into the regulation and storage tank. After the regulation and storage tank is full, the excess combined water in the interception well is overflowed to the surface water system through the overflow pipe of the interception well. The diversion storage system mainly solves the problem of initial rainwater. The storage tank of the diversion storage system is also set behind the interception well of the diversion storage system. After rainfall, the intercepted initial rainwater directly enters the storage tank through the interception well. After the storage tank is full, the excess rainwater in the interception well will overflow into the surface water system through the overflow pipe of the interception well.

[0003] Among them, the diameter of the water inlet pipe of the regulating and storage tank of the regulating and storage system is an important parameter in the design of the regulating and storage system, which directly affects the water inlet efficiency of the regulating and storage tank and the performance of the entire regulating and storage system.

[0004] In the prior art, the diameter of the water inlet pipe of the regulating reservoir in the diverter regulating and storage system is usually determined by calculating the ultimate strength method of the rainwater pipe. In practice, the diameter of the water inlet pipe is usually designed to be too large, and the designed diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment; while the diameter of the water inlet pipe of the regulating and storage tank in the combined regulating and storage system is usually determined according to the dry flow sewage volume and the interception multiple. In practice, the diameter of the water inlet pipe is usually designed to be too small, and the designed diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the inability to fully exert the regulation and storage benefits, leading to frequent overflow problems.

[0005] To sum up, the existing regulation and storage systems usually have an inapplicable method for calculating the diameter of the water inlet pipe of the regulating and storage tank, which makes the water inlet pipe of the regulating and storage tank often have a diameter that is too large, and the designed diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment; or the diameter is too small, and the designed diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the regulation and storage benefits cannot be fully utilized, leading to technical problems such as frequent overflows. Summary of the invention

[0006] The present invention provides a method for optimizing the diameter of an inlet pipe of a regulating reservoir, thereby solving the problem that a method for calculating the diameter of an inlet pipe of a regulating reservoir is usually not applicable in existing regulating reservoir systems, so that the inlet pipe of the regulating reservoir often has a diameter that is too large, and the designed diversion capacity of the inlet pipe is greater than the maximum diversion flow value required by the regulating reservoir, resulting in a waste of investment; or the diameter is too small, and the designed diversion capacity of the inlet pipe is less than the maximum diversion flow value required by the regulating reservoir, resulting in the inability to fully exert the regulating and storage benefits, leading to frequent overflows.

[0007] The technical solution adopted by the present invention is: a method for optimizing the diameter of a water inlet pipe of a regulating reservoir, the method comprising:

[0008] Obtain the rainfall process line information of the storage system site selection area;

[0009] The design type of the regulating and storage system is selected, and the design type of the regulating and storage system is a combined regulating and storage system or a separate regulating and storage system; according to the selected design type of the regulating and storage system, a plurality of design parameters of the regulating and storage system are determined; wherein the plurality of design parameters of the regulating and storage system include a maximum pipe diameter dimension parameter of a water inlet pipe of a regulating and storage tank of the regulating and storage system;

[0010] According to the multiple design parameters, a rainfall simulation model of the regulation and storage system is established, wherein the rainfall simulation model includes a first module and a second module;

[0011] Input the multiple design parameters and the rain type process line information into the first module, use the first module to simulate the water inflow of the regulating and storing system, and output the water inflow-time curve information of the regulating and storing system; and use the first module to obtain the constraint conditions of the second module according to the multiple design parameters and the water inflow-time curve information;

[0012] Inputting the water inlet flow-time curve information and the constraint condition into the second module, simulating the water inlet flow of the water inlet pipe using the second module, and outputting the maximum flow value of the water inlet pipe during the simulation process;

[0013] According to the outputted maximum flow value, the design diameter value of the water inlet pipe is obtained.

[0014] By using the first module to simulate the water inflow of the regulating and storage system, the water inflow-time curve information of the regulating and storage system can be obtained (that is, the water inflow-time curve information of the intercepting well entering the regulating and storage system during rainfall is simulated); and the first module is used to obtain the constraint conditions of the second module according to the multiple design parameters and the water inflow-time curve information; and by presetting the pipe diameter parameter of the water inlet pipe of the regulating and storage tank of the regulating and storage system in the rainfall simulation model of the regulating and storage system as the maximum pipe diameter size parameter, it can also be ensured that after the water inflow of the water inlet pipe is simulated by the second module, the output maximum flow value is the same as the maximum diversion flow value required by the regulating and storage tank of the regulating and storage system; so that the pipe diameter optimization method of the water inlet pipe of the regulating and storage tank provided by the present invention can use the second module to optimize the water inlet flow of the water inlet pipe The maximum flow value output by the simulation can accurately correspond to the maximum diversion flow value required by the regulating and storage tank of the regulating and storage system, and then the design diameter value of the water inlet pipe can be accurately obtained through the output of the maximum flow value; thereby, the design diversion capacity of the water inlet pipe designed by the design diameter value of the water inlet pipe determined by the diameter optimization method of the water inlet pipe of the regulating and storage tank provided by the present invention can match the maximum diversion flow value required by the regulating and storage tank, thereby solving the problem that the diameter calculation method of the water inlet pipe of the regulating and storage tank in the existing regulating and storage system is usually not applicable, so that the water inlet pipe of the regulating and storage tank often has a diameter that is too large, and the design diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment, or the diameter is too small, and the design diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the inability to fully exert the regulation and storage benefits, leading to frequent overflow technical problems.

[0015] Specifically, the second module simulates the water inlet flow of the water inlet pipe to obtain the flow value-time information of the water inlet pipe during the simulation process, and the second module outputs the maximum flow value of the water inlet pipe during the simulation process based on the obtained flow value-time information.

[0016] Furthermore, when the selected design type of the regulation and storage system is a combined regulation and storage system, the multiple design parameters also include design capacity parameters of the regulation and storage tank of the regulation and storage system, and maximum sewage interception parameters of the sewage treatment plant of the regulation and storage system for the sewage in the interception well of the regulation and storage system.

[0017] Furthermore, when the selected design type of the regulation and storage system is a combined regulation and storage system, the constraint condition is:

[0018]

[0019] Among them, V mis the design capacity of the regulating reservoir; t0 is the time when the regulating reservoir starts to store water during the simulation process; t m is the moment when the regulating reservoir is full during the simulation process; r(t) is the water inlet flow-time curve function of the regulating storage system; Q1 is the maximum sewage interception flow value of the sewage treatment plant for the sewage in the interception well.

[0020] By utilizing the first module to determine the corresponding multiple design parameters when the design type of the regulating and storage system is selected as a combined regulating and storage system, and the output water inlet flow-time curve information of the regulating and storage system, the constraint conditions of the second module are determined to ensure that the second module simulates the water inlet flow of the water inlet pipe of the combined regulating and storage system, and can obtain the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process (specifically, before the regulating and storage tank is full during the simulation process). After the second module obtains the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process, the maximum flow value of the water inlet pipe of the combined regulating and storage system during the simulation process can be obtained according to the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process, and the obtained maximum flow value is output.

[0021] Furthermore, the sewage treatment plant calculates the maximum sewage interception flow value of the sewage in the interception well using the following formula:

[0022] Q1=Q2+nQ2

[0023] Among them, Q1 is the maximum sewage interception flow value of the sewage treatment plant for the sewage in the interception well; Q2 is the dry flow sewage interception flow value of the sewage treatment plant for the sewage in the interception well; and n is the interception multiple.

[0024] Furthermore, when the selected design type of the regulation and storage system is a combined regulation and storage system, the flow value of the water inlet pipe during the simulation process is calculated using the following formula:

[0025] Q t =r(t)-Q1(t0≤t≤t m );

[0026] Wherein, Qt is the flow value of the water inlet pipe at the tth moment in the simulation process when the design type of the regulation and storage system is a combined regulation and storage system; r(t) is the water inlet flow-time curve function of the regulation and storage system; Q1 is the maximum sewage interception flow value of the sewage treatment plant for the sewage in the interception well; t0 is the moment when the regulation and storage tank starts to store water in the simulation process; t m It is the time when the regulating reservoir is filled during the simulation process.

[0027] Furthermore, when the selected design type of the regulation and storage system is a diversion regulation and storage system, the multiple design parameters also include design capacity parameters of a regulation and storage tank of the regulation and storage system.

[0028] Furthermore, when the selected design type of the regulation and storage system is a split-flow regulation and storage system, the constraint condition is:

[0029]

[0030] Among them, V m is the design capacity of the regulating reservoir; t0 is the time when the regulating reservoir starts to store water during the simulation process; t m is the time when the regulating reservoir is full; r(t) is the water inlet flow-time curve function of the regulating storage system.

[0031] By utilizing the first module to determine the corresponding multiple design parameters when the design type of the regulating and storage system is a shunt regulating and storage system, and the output water inlet flow-time curve information of the regulating and storage system, the constraint conditions of the second module are determined to ensure that the second module simulates the water inlet flow of the water inlet pipe of the shunt regulating and storage system, and can obtain the water inlet flow-time information of the water inlet pipe of the shunt regulating and storage system during the simulation process (specifically, before the regulating and storage tank is full during the simulation process). After the second module obtains the water inlet flow-time information of the water inlet pipe of the shunt regulating and storage system during the simulation process, the maximum flow value of the water inlet pipe of the shunt regulating and storage system during the simulation process can be obtained according to the water inlet flow-time information of the water inlet pipe of the shunt regulating and storage system during the simulation process, and the obtained maximum flow value is output.

[0032] Furthermore, when the selected design type of the regulating and storing system is a diversion regulating and storing system, the flow value of the water inlet pipe during the simulation process is calculated using the following formula:

[0033] Q′ t =r(t)(t0≤t≤t m );

[0034] Among them, Q′ t When the design type of the regulating and storage system is a diversion regulating and storage system, the flow value of the water inlet pipe at the tth moment in the simulation process, r(t) is the water inlet flow-time curve function of the regulating and storage system; t0 is the moment when the regulating and storage tank starts to store water in the simulation process; t m It is the time when the regulating reservoir is filled during the simulation process.

[0035] Furthermore, the method for obtaining the rain type process line information of the site selection area of ​​the regulation and storage system includes: according to the design recurrence period of the regulation and storage system and the short-duration rainstorm formula of the site selection area of ​​the regulation and storage system; calculating the short-duration rainstorm design rainfall corresponding to the site selection area of ​​the regulation and storage system;

[0036] The short-duration rainstorm design rainfall is distributed to obtain the rain type process line information of the site selection area of ​​the regulation and storage system.

[0037] Among them, the rainfall allocation for the short-duration rainstorm design rainfall can be carried out with reference to the "Chicago rain type", "bimodal rain type" and "local rain type". The present invention does not limit the referenced rain type, but all are within the protection scope.

[0038] Furthermore, according to the outputted maximum flow value, the method for obtaining the design diameter value of the water inlet pipe includes:

[0039] According to the design elevation of the regulating and storing tank and the design elevation of the intercepting well of the regulating and storing system, the design type of the water inlet pipe is selected, and the design type of the water inlet pipe is a gravity water inlet pipe or a pump-lift water inlet pipe;

[0040] The design diameter of the water inlet pipe is calculated based on the maximum flow value and the selected design type of the water inlet pipe.

[0041] Furthermore, if the selected design type of the water inlet pipe is a gravity water inlet pipe, based on the maximum flow value, the Manning formula is used to calculate according to the full pipe flow to obtain the design pipe diameter value of the water inlet pipe.

[0042] Furthermore, if the selected design type of the water inlet pipe is a pump-lift water inlet pipe, the Shevelev formula is used to calculate based on the maximum flow value to obtain the design diameter value of the water inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a combined flow regulation and storage system in the embodiment;

[0044] Figure 2 It is a flow-dividing regulation and storage system in the embodiment;

[0045] Figure 3 A schematic diagram of calculating the maximum flow value of the water inlet pipe of the combined flow regulation and storage system in the embodiment;

[0046] Figure 4 Schematic diagram of calculation of the maximum flow value of the water inlet pipe of the regulating storage tank of the diversion regulating storage system in the embodiment. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention:

[0048] The regulation and storage system is divided into a combined regulation and storage system and a diversion regulation and storage system according to the drainage system of the setting area.

[0049] like Figure 1 As shown in the figure, the combined sewerage regulation and storage system mainly solves the overflow pollution problem caused by insufficient interception multiples during rainy days. The combined sewerage regulation and storage system's regulation and storage tank is set behind the interception well of the combined sewerage regulation and storage system. When it rains, the combined water in the interception well first enters the sewage treatment plant, and then the combined water (such as Figure 1 As shown, that is, the flow of the combined water entering the interception well through the combined pipe exceeds the interception flow of the sewage treatment plant, causing the combined water in the interception well to exceed the amount. The excess combined water in the interception well is then introduced into the regulating storage tank. After the regulating storage tank is full, the excess combined water in the interception well is overflowed to the surface water system through the interception well overflow pipe.

[0050] like Figure 2 As shown, the diversion storage system mainly solves the problem of initial rainwater. The storage tank of the diversion storage system is also set behind the interception well of the diversion storage system. After rainfall, the intercepted initial rainwater directly enters the storage tank through the interception well. After the storage tank is full, the excess rainwater in the interception well will overflow into the surface water system through the overflow pipe of the interception well.

[0051] Among them, the diameter of the water inlet pipe of the regulating and storage tank of the regulating and storage system is an important parameter in the design of the regulating and storage system, which directly affects the water inlet efficiency of the regulating and storage tank and the performance of the entire regulating and storage system.

[0052] In the prior art, the diameter of the water inlet pipe of the regulating reservoir in the diverter regulating and storage system is usually determined by calculating the ultimate strength method of the rainwater pipe. In practice, the diameter of the water inlet pipe is usually designed to be too large, and the designed diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment; while the diameter of the water inlet pipe of the regulating and storage tank in the combined regulating and storage system is usually determined according to the dry flow sewage volume and the interception multiple. In practice, the diameter of the water inlet pipe is usually designed to be too small, and the designed diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the inability to fully exert the regulation and storage benefits, leading to frequent overflow problems.

[0053] To sum up, the existing regulation and storage systems usually have an inapplicable method for calculating the diameter of the water inlet pipe of the regulating and storage tank, which makes the water inlet pipe of the regulating and storage tank often have a diameter that is too large, and the designed diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment; or the diameter is too small, and the designed diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the regulation and storage benefits cannot be fully utilized, leading to technical problems such as frequent overflows.

[0054] In order to solve the above technical problems, Figure 3 and Figure 4 As shown, this embodiment provides a method for optimizing the diameter of a water inlet pipe of a regulating reservoir, and the method for optimizing the diameter of a water inlet pipe includes:

[0055] Obtain the rainfall process line information (i.e. Figure 3 and Figure 4 The rainfall process line shown in );

[0056] Selecting a design type of a regulating and storage system, which is a combined regulating and storage system or a diverting regulating and storage system; determining a plurality of design parameters of the regulating and storage system according to the selected design type of the regulating and storage system; wherein the plurality of design parameters of the regulating and storage system include a maximum pipe diameter dimension parameter of a water inlet pipe of a regulating and storage tank of the regulating and storage system;

[0057] According to a plurality of design parameters, a rainfall simulation model of the regulation and storage system is established, and the rainfall simulation model includes a first module and a second module;

[0058] Input multiple design parameters and rain type process line information into the first module, use the first module to simulate the water inflow of the regulation and storage system, and output the water inflow-time curve information of the regulation and storage system (that is, in Figure 3 and Figure 4 and using the first module to obtain the constraint conditions of the second module according to multiple design parameters and the inlet flow-time curve information;

[0059] Input the water inlet flow-time curve information and constraint conditions into the second module, use the second module to simulate the water inlet flow of the water inlet pipe, and output the maximum flow value of the water inlet pipe during the simulation process;

[0060] According to the output maximum flow value, the design diameter value of the water inlet pipe is obtained.

[0061] By using the first module to simulate the water inlet flow of the regulating and storage system, the water inlet flow-time curve information of the regulating and storage system can be obtained (that is, the water inlet flow-time curve information of the intercepting well entering the regulating and storage system during rainfall is simulated); and the first module is used to obtain the constraint conditions of the second module according to multiple design parameters and the water inlet flow-time curve information; and by presetting the pipe diameter parameter of the water inlet pipe of the regulating and storage tank of the regulating and storage system in the rainfall simulation model of the regulating and storage system as the maximum pipe diameter size parameter, it can also be ensured that after the water inlet flow of the water inlet pipe is simulated by the second module, the output maximum flow value is the same as the maximum diversion flow value required by the regulating and storage tank of the regulating and storage system; so that the pipe diameter optimization method of the water inlet pipe of the regulating and storage tank provided by the present invention can use the second module to simulate the water inlet flow of the water inlet pipe and output The maximum flow value can accurately correspond to the maximum diversion flow value required by the regulating and storage tank of the regulating and storage system, and then the design diameter value of the water inlet pipe can be accurately obtained through the output maximum flow value; thereby, the design diversion capacity of the water inlet pipe designed by the design diameter value of the water inlet pipe determined by the diameter optimization method of the water inlet pipe of the regulating and storage tank provided by the present invention can be matched with the maximum diversion flow value required by the regulating and storage tank, thereby solving the problem that the diameter calculation method of the water inlet pipe of the regulating and storage tank in the existing regulating and storage system is usually not applicable, so that the water inlet pipe of the regulating and storage tank often has a diameter that is too large, and the design diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment; or the diameter is too small, and the design diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the inability to fully exert the regulation and storage benefits, leading to frequent overflow technical problems.

[0062] Specifically, in this embodiment, the second module simulates the water inlet flow of the water inlet pipe to obtain the flow value-time information of the water inlet pipe during the simulation process. The second module outputs the maximum flow value of the water inlet pipe during the simulation process based on the obtained flow value-time information.

[0063] Below, the selection of the aforementioned multiple design parameters and the corresponding constraints are explained in detail.

[0064] In this embodiment, when the design type of the selected regulation and storage system is a combined regulation and storage system, the multiple design parameters also include the design capacity parameters of the regulation and storage tank of the regulation and storage system, and the maximum sewage interception parameters of the sewage treatment plant of the regulation and storage system for the sewage in the interception well of the regulation and storage system.

[0065] Correspondingly, when the design type of the selected storage system is a combined storage system, the constraints are:

[0066]

[0067] Among them, V mis the design capacity of the regulating reservoir; t0 is the time when the regulating reservoir starts to store water during the simulation process; t m is the moment when the regulating reservoir is full during the simulation process; r(t) is the inlet flow-time curve function of the regulating storage system; Q1 is the maximum sewage interception flow value of the sewage treatment plant for the sewage in the interception well.

[0068] By utilizing the first module to determine the corresponding multiple design parameters when the design type of the selected regulating and storage system is a combined regulating and storage system, and the output water inlet flow-time curve information of the regulating and storage system, the constraint conditions of the second module are determined to ensure that the second module simulates the water inlet flow of the water inlet pipe of the combined regulating and storage system, and can obtain the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process (specifically, before the regulating and storage tank is full during the simulation process). After the second module obtains the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process, the maximum flow value of the water inlet pipe of the combined regulating and storage system during the simulation process can be obtained according to the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process, and the obtained maximum flow value is output.

[0069] In this embodiment, the maximum sewage interception flow value of the sewage in the interception well is calculated by the sewage treatment plant using the following formula:

[0070] Q1=Q2+nQ2

[0071] Among them, Q1 is the maximum sewage interception flow value of the sewage treatment plant for sewage in the interception well; Q2 is the dry flow sewage interception flow value of the sewage treatment plant for sewage in the interception well; n is the interception multiple.

[0072] Specifically, in this embodiment, when the design type of the selected regulation and storage system is a combined regulation and storage system, the flow value of the water inlet pipe during the simulation process is calculated using the following formula:

[0073] Q t =r(t)-Q1(t0≤t≤t m );

[0074] Among them, Qt is the flow value of the inlet pipe at the tth moment in the simulation process when the design type of the storage system is a combined storage system; r(t) is the inlet flow-time curve function of the storage system; Q1 is the maximum sewage interception flow value of the sewage treatment plant to the sewage in the interception well; t0 is the moment when the storage tank starts to store water in the simulation process; t m It is the moment when the regulating reservoir is filled during the simulation process.

[0075] That is, when the selected storage system design type is a combined storage system, the maximum flow value of the inlet pipe during the simulation process is MAX(Q t ).

[0076] In this embodiment, when the design type of the selected regulation and storage system is a split-flow regulation and storage system, the plurality of design parameters further include a design capacity parameter of a regulation and storage tank of the regulation and storage system.

[0077] Correspondingly, when the design type of the selected storage system is the diversion storage system, the constraints are:

[0078]

[0079] Among them, V m is the design capacity of the regulating reservoir; t0 is the time when the regulating reservoir starts to store water during the simulation process; t m is the time when the regulating reservoir is full; r(t) is the water inlet flow-time curve function of the regulating storage system.

[0080] By utilizing the first module to determine the corresponding multiple design parameters when the design type of the selected regulating and storage system is a diversion regulating and storage system, and the output water inlet flow-time curve information of the regulating and storage system, the constraint conditions of the second module are determined to ensure that the second module simulates the water inlet flow of the water inlet pipe of the diversion regulating and storage system, and can obtain the water inlet flow-time information of the water inlet pipe of the diversion regulating and storage system during the simulation process (specifically, before the regulating and storage tank is full during the simulation process). After the second module obtains the water inlet flow-time information of the water inlet pipe of the diversion regulating and storage system during the simulation process, the maximum flow value of the water inlet pipe of the diversion regulating and storage system during the simulation process can be obtained according to the water inlet flow-time information of the water inlet pipe of the diversion regulating and storage system during the simulation process, and the obtained maximum flow value is output.

[0081] In this embodiment, when the design type of the selected regulation and storage system is a split-flow regulation and storage system, the flow value of the water inlet pipe during the simulation process is calculated using the following formula:

[0082] Q′ t =r(t)(t0≤t≤t m );

[0083] Among them, Q′ t When the design type of the storage system is a diversion storage system, the flow value of the water inlet pipe at the tth moment in the simulation process, r(t) is the water inlet flow-time curve function of the storage system; t0 is the moment when the storage tank starts to store water during the simulation process; t m It is the moment when the regulating reservoir is filled during the simulation process.

[0084] That is, when the selected storage system design type is a combined storage system, the maximum flow value of the inlet pipe during the simulation process is MAX(Q′ t ).

[0085] In this embodiment, the method for obtaining the rain type process line information of the site selection area of ​​the regulation and storage system includes: according to the design recurrence period of the regulation and storage system and the short-duration rainstorm formula of the site selection area of ​​the regulation and storage system; calculating the short-duration rainstorm design rainfall corresponding to the site selection area of ​​the regulation and storage system;

[0086] The rainfall distribution is carried out on the design rainfall of short-duration rainstorm to obtain the rainfall process line information of the site selection area of ​​the regulation and storage system.

[0087] Among them, the rainfall allocation for the short-duration rainstorm design rainfall can be carried out with reference to the "Chicago rain type", "bimodal rain type" and "local rain type". The present invention does not limit the referenced rain type, but they are all within the protection scope.

[0088] In this embodiment, the method for obtaining the design diameter value of the water inlet pipe according to the output maximum flow value includes:

[0089] According to the design elevation of the regulating and storage tank and the design elevation of the intercepting well of the regulating and storage system, the design type of the water inlet pipe is selected, and the design type of the water inlet pipe is a gravity water inlet pipe or a pump-lift water inlet pipe;

[0090] According to the maximum flow value and the design type of the selected water inlet pipe, the design diameter value of the water inlet pipe is calculated.

[0091] There are many methods for calculating the design diameter of the water inlet pipe based on the maximum flow value and the selected design type of the water inlet pipe, such as but not limited to: using the maximum flow value and the economic flow rate in the specification to determine the design diameter value.

[0092] Preferably, in this embodiment, if the design type of the selected water inlet pipe is a gravity water inlet pipe, the design diameter value of the water inlet pipe is obtained based on the maximum flow value and the Manning formula is used to calculate according to the full pipe flow.

[0093] Preferably, in this embodiment, if the design type of the selected water inlet pipe is a pump-lift water inlet pipe, the Shevelev formula is used to calculate based on the maximum flow value to obtain the design diameter value of the water inlet pipe.

[0094] The method for optimizing the diameter of the water inlet pipe of the regulating reservoir provided by the present invention has at least the following technical effects or advantages:

[0095] 1. By using the first module to simulate the water inflow of the regulating and storage system, the water inflow-time curve information of the regulating and storage system can be obtained (that is, the water inflow-time curve information of the intercepting well entering the regulating and storage system during rainfall is simulated); and the first module is used to obtain the constraint conditions of the second module according to multiple design parameters and the water inflow-time curve information; and by presetting the pipe diameter parameter of the water inlet pipe of the regulating and storage tank of the regulating and storage system in the rainfall simulation model of the regulating and storage system as the maximum pipe diameter size parameter, it can also be ensured that after the water inflow of the water inlet pipe is simulated by the second module, the output maximum flow value is the same as the maximum diversion flow value required by the regulating and storage tank of the regulating and storage system; so that the pipe diameter optimization method of the water inlet pipe of the regulating and storage tank provided by the present invention can use the second module to simulate the water inflow of the water inlet pipe and output The maximum flow value can accurately correspond to the maximum diversion flow value required by the regulating and storage tank of the regulating and storage system, and then the design diameter value of the water inlet pipe can be accurately obtained through the output maximum flow value; thereby, the design diversion capacity of the water inlet pipe designed by the design diameter value of the water inlet pipe determined by the diameter optimization method of the water inlet pipe of the regulating and storage tank provided by the present invention can match the maximum diversion flow value required by the regulating and storage tank, thereby solving the technical problems that the diameter calculation method of the water inlet pipe of the regulating and storage tank in the existing regulating and storage system is usually not applicable, so that the water inlet pipe of the regulating and storage tank often has a diameter that is too large, and the design diversion capacity of the water inlet pipe is greater than the maximum diversion flow value required by the regulating and storage tank, resulting in a waste of investment; or the diameter is too small, and the design diversion capacity of the water inlet pipe is less than the maximum diversion flow value required by the regulating and storage tank, resulting in the inability to fully exert the regulation and storage benefits, leading to frequent overflows.

[0096] 2. By utilizing the corresponding multiple design parameters determined by the first module when the design type of the selected regulating and storage system is a combined regulating and storage system, and the output water inlet flow-time curve information of the regulating and storage system, the constraint conditions of the second module are determined to ensure that the second module simulates the water inlet flow of the water inlet pipe of the combined regulating and storage system, and can obtain the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process (specifically, before the regulating and storage tank is full during the simulation process). After the second module obtains the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process, the maximum flow value of the water inlet pipe of the combined regulating and storage system during the simulation process can be obtained according to the water inlet flow-time information of the water inlet pipe of the combined regulating and storage system during the simulation process, and the obtained maximum flow value is output.

[0097] 3. By utilizing the corresponding multiple design parameters determined by the first module when the design type of the selected regulating and storage system is a diversion regulating and storage system, and the output water inlet flow-time curve information of the regulating and storage system, the constraint conditions of the second module are determined to ensure that the second module simulates the water inlet flow of the water inlet pipe of the diversion regulating and storage system, and can obtain the water inlet flow-time information of the water inlet pipe of the diversion regulating and storage system during the simulation process (specifically, before the regulating and storage tank is full during the simulation process). After the second module obtains the water inlet flow-time information of the water inlet pipe of the diversion regulating and storage system during the simulation process, the maximum flow value of the water inlet pipe of the diversion regulating and storage system during the simulation process can be obtained according to the water inlet flow-time information of the water inlet pipe of the diversion regulating and storage system during the simulation process, and the obtained maximum flow value is output.

[0098] The above are only specific application examples of the present invention and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A method for optimizing the diameter of a water inlet pipe of a storage tank, characterized in that: The pipe diameter optimization method comprises: Obtain the rainfall process line information of the storage system site selection area; The design type of the regulating and storage system is selected, and the design type of the regulating and storage system is a combined regulating and storage system or a separate regulating and storage system; according to the selected design type of the regulating and storage system, a plurality of design parameters of the regulating and storage system are determined; wherein the plurality of design parameters of the regulating and storage system include a maximum pipe diameter dimension parameter of a water inlet pipe of a regulating and storage tank of the regulating and storage system; According to the multiple design parameters, a rainfall simulation model of the regulation and storage system is established, wherein the rainfall simulation model includes a first module and a second module; Input the multiple design parameters and the rain type process line information into the first module, use the first module to simulate the water inflow of the regulating and storing system, and output the water inflow-time curve information of the regulating and storing system; and use the first module to obtain the constraint conditions of the second module according to the multiple design parameters and the water inflow-time curve information; The water inlet flow-time curve information and the constraint conditions are input into the second module, and the water inlet flow of the water inlet pipe is simulated using the second module to output the maximum flow value of the water inlet pipe during the simulation process; based on the output maximum flow value, the design pipe diameter value of the water inlet pipe is obtained.

2. The method for optimizing the pipe diameter of the water inlet pipe of the regulating reservoir according to claim 1, characterized in that: When the selected design type of the regulation and storage system is a combined regulation and storage system, the multiple design parameters also include the design capacity parameters of the regulation and storage tank of the regulation and storage system, and the maximum sewage interception parameters of the sewage treatment plant of the regulation and storage system for the sewage in the interception well of the regulation and storage system.

3. The method for optimizing the diameter of the water inlet pipe of the regulating reservoir according to claim 2, characterized in that: When the selected design type of the regulation and storage system is a combined regulation and storage system, the constraint conditions are: Among them, V m is the design capacity of the regulating reservoir; t0 is the time when the regulating reservoir starts to store water during the simulation process; t m is the moment when the regulating reservoir is full during the simulation process; r(t) is the water inlet flow-time curve function of the regulating storage system; Q1 is the maximum sewage interception flow value of the sewage treatment plant for the sewage in the interception well.

4. The method for optimizing the diameter of the water inlet pipe of the regulating reservoir according to claim 3, characterized in that: The sewage treatment plant calculates the maximum sewage interception flow value of the sewage in the interception well using the following formula: Q1=Q2+nQ2 Among them, Q1 is the maximum sewage interception flow value of the sewage treatment plant for the sewage in the interception well; Q2 is the dry flow sewage interception flow value of the sewage treatment plant for the sewage in the interception well; and n is the interception multiple.

5. The method for optimizing the diameter of the water inlet pipe of the regulating reservoir according to claim 2, characterized in that: When the selected design type of the regulation and storage system is a combined regulation and storage system, the flow value of the water inlet pipe during the simulation process is calculated using the following formula: Q t =r(t)―Q1 (t0≤t≤t m ); Among them, Q t is the flow value of the water inlet pipe at the tth moment in the simulation process when the design type of the regulation and storage system is a combined regulation and storage system; r(t) is the water inlet flow-time curve function of the regulation and storage system; Q1 is the maximum sewage interception flow value of the sewage in the interception well by the sewage treatment plant; t0 is the moment when the regulation and storage tank starts to store water in the simulation process; t m It is the time when the regulating reservoir is filled during the simulation process.

6. The method for optimizing the diameter of the water inlet pipe of the regulating reservoir according to claim 1, characterized in that: When the selected design type of the regulation and storage system is a diversion regulation and storage system, the multiple design parameters also include design capacity parameters of the regulation and storage tank of the regulation and storage system.

7. The method for optimizing the diameter of the water inlet pipe of the regulating reservoir according to claim 6, characterized in that: When the selected design type of the regulation and storage system is a split-flow regulation and storage system, the constraint conditions are: Among them, V m is the design capacity of the regulating reservoir; t0 is the time when the regulating reservoir starts to store water during the simulation process; t m is the time when the regulating reservoir is full; r(t) is the water inlet flow-time curve function of the regulating storage system.

8. The method for optimizing the diameter of the water inlet pipe of the regulating reservoir according to claim 6, characterized in that: When the selected design type of the regulating and storing system is a diversion regulating and storing system, the flow value of the water inlet pipe during the simulation process is calculated using the following formula: Q′ t =r(t) (t0≤t≤t m ); Among them, Q′ t When the design type of the regulating and storage system is a diversion regulating and storage system, the flow value of the water inlet pipe at the tth moment in the simulation process, r(t) is the water inlet flow-time curve function of the regulating and storage system; t0 is the moment when the regulating and storage tank starts to store water in the simulation process; t m It is the time when the regulating reservoir is filled during the simulation process.

9. The method for optimizing the diameter of the water inlet pipe of a regulating reservoir according to claim 1, characterized in that: The method for obtaining the rain type process line information of the site selection area of ​​the regulation and storage system comprises: according to the design recurrence period of the regulation and storage system and the short-duration rainstorm formula of the site selection area of ​​the regulation and storage system; calculating the short-duration rainstorm design rainfall corresponding to the site selection area of ​​the regulation and storage system; The short-duration rainstorm design rainfall is distributed to obtain the rain type process line information of the site selection area of ​​the regulation and storage system.

10. The method for optimizing the diameter of a water inlet pipe of a regulating reservoir according to claim 1, characterized in that: The method for obtaining the design diameter value of the water inlet pipe according to the outputted maximum flow value includes: According to the design elevation of the regulating and storing tank and the design elevation of the intercepting well of the regulating and storing system, the design type of the water inlet pipe is selected, and the design type of the water inlet pipe is a gravity water inlet pipe or a pump-lift water inlet pipe; The design diameter of the water inlet pipe is calculated based on the maximum flow value and the selected design type of the water inlet pipe.

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