A drainage system and drainage method based on municipal road diversion pipe network

Abstract

The present invention discloses a drainage system and a drainage method based on a municipal road diversion pipe network, wherein the drainage system comprises: a combined pipe, along which sewage branches and rainwater outlets in a unit area are respectively connected; an interception part, which is arranged near an access position where the sewage branch pipe is connected to the combined pipe or upstream of the access position, the interception part has an inlet and a first outlet, the inlet is connected to the sewage branch pipe, the first outlet is connected to the combined pipe, a first hydraulic switch is arranged to control water flow through the first outlet; a diversion facility, the diversion facility has an inlet, a third outlet and a fourth outlet, the inlet of the diversion facility is connected to the combined pipe, the third outlet is connected to a municipal sewage pipe, the fourth outlet is connected to a municipal rainwater pipe, and the diversion facility is located downstream of the sewage branch pipe and the rainwater outlet, the diversion facility also has hydraulic switches for respectively controlling water flow through the third outlet and the fourth outlet, and the diversion facility is used to divert dirty water to the municipal sewage pipe and divert clean water to the municipal rainwater pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage, and in particular to a drainage system and a drainage method based on a municipal road diversion pipe network. Background Art

[0002] Urban municipal road pipe networks are divided into combined pipe network systems and separate pipe network systems. The existing drainage system for the municipal road separate pipe network system mixes sewage, industrial wastewater and rainwater in the same pipe. If it is directly discharged into natural water bodies, the receiving water bodies will suffer serious pollution. If it is directly discharged into a sewage treatment plant for treatment, a large amount of relatively clean rainwater on rainy days will enter the sewage treatment plant for unnecessary treatment, resulting in a waste of resources.

[0003] It can be seen from this that in the prior art, for the diversion pipe network, sewage and rainwater are mixed together. When discharged directly into natural water bodies, the receiving water bodies are seriously polluted. When discharged directly into sewage treatment facilities for treatment, a large amount of relatively clean rainwater on rainy days enters the sewage treatment facilities for unnecessary treatment, resulting in a waste of resources. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a drainage system and drainage method based on the municipal road diversion pipe network, which has the advantages of low management cost and good management effect.

[0005] The present invention provides a drainage system based on a municipal road diversion pipe network, the municipal road diversion pipe network includes a municipal sewage pipe and a municipal rainwater pipe; the drainage system includes: a combined pipe, along which sewage branches and rainwater outlets in a unit area are respectively connected; an interception part, which is arranged near the access position where the sewage branch pipe is connected to the combined pipe or upstream of the access position, the interception part has an inlet and a first outlet, the inlet is connected to the sewage branch pipe, the first outlet is connected to the combined pipe, and a first hydraulic switch is arranged to control the water flow of the first outlet; a diversion facility, the diversion facility has an inlet, a third outlet and a fourth outlet, the inlet of the diversion facility is connected to the combined pipe, the third outlet is connected to the municipal sewage pipe, the fourth outlet is connected to the municipal rainwater pipe, and the diversion facility is located downstream of the sewage branch pipe and the rainwater outlet, the diversion facility also has hydraulic switches for respectively controlling the water flow of the third outlet and the fourth outlet, and the diversion facility is used to divert dirty water to the municipal sewage pipe and divert clean water to the municipal rainwater pipe.

[0006] Optionally, a sewage receiving facility is provided between the sewage branch pipe and the intercepting part, and the inlet of the intercepting part is connected to the outlet of the sewage receiving facility; or, the inlet of the intercepting part is connected to several sewage branch pipes.

[0007] Optionally, the interception section is a diversion well, an interception well, a discard well, a buffer gallery or an installation well.

[0008] Optionally, it also includes a control system, which includes a first monitoring device and a controller, the first monitoring device is connected to the controller signal, the first monitoring device is used to monitor rainfall signals, and the controller is used to control the water switch actions of the first outlet, the third outlet, and the fourth outlet according to the rainfall signals.

[0009] Optionally, the first monitoring device is at least one of a device for monitoring a water level, a device for monitoring a water quality, a device for monitoring rainfall, and a device for monitoring a total amount of water;

[0010] Correspondingly, the rainfall signal is at least one of a water body level signal, a water body water quality signal, a rainfall signal, and a water body total amount signal.

[0011] Optionally, the control system further comprises a third monitoring device, and the third monitoring device is used to monitor the capacity signal of the municipal sewage pipe (12).

[0012] Optionally, the control system further includes a fourth monitoring device, and the fourth monitoring device is used to monitor rainfall intensity in the unit area.

[0013] The present invention also provides a drainage system based on a municipal road diversion pipe network, wherein the municipal road diversion pipe network includes a municipal sewage pipe and a municipal rainwater pipe; the drainage system includes: a combined pipe, along which a plurality of sewage branch pipes and rainwater inlets in the plurality of unit areas are respectively connected; a plurality of intercepting parts adapted to the number of unit areas, each intercepting part corresponds to a connection of the sewage branch pipe and is arranged near the access position where the sewage branch pipe is connected to the combined branch pipe or upstream of the access position, each of the intercepting parts has an inlet and a first outlet, the inlet is connected to the corresponding sewage branch pipe, the The first outlet is connected to the combined branch pipe through the first hydraulic switch, and the first hydraulic switch controls the water flow of the first outlet; a diversion facility, the diversion facility has an inlet, a third outlet and a fourth outlet, the inlet of the diversion facility is connected to the combined pipe, the third outlet is connected to the municipal sewage pipe, the fourth outlet is connected to the municipal rainwater pipe, and the diversion facility is located downstream of the sewage branch pipe and the rainwater outlet, the diversion facility also has hydraulic switches that respectively control the water flow of the third outlet and the fourth outlet, and the diversion facility is used to divert dirty water to the municipal sewage pipe and divert clean water to the municipal rainwater pipe.

[0014] The present invention also provides a drainage method based on a municipal road diversion pipe network, which is applicable to any of the drainage systems described above, and is specifically as follows: when a sunny signal is detected, the first outlet of the interception part is opened, the third outlet of the diversion facility is opened, and the fourth outlet is closed, and the dirty water is diverted to the municipal sewage pipe through the first outlet, the combined pipe, the diversion facility, and the third outlet;

[0015] When a rainy day signal is detected, the first outlet of the interception part is closed, the third outlet of the diversion facility is closed, and the fourth outlet is opened, and the water flowing into the rainwater outlet is gathered in the combined pipe and diverted to the municipal rainwater pipe through the diversion facility and the fourth outlet; the method also includes: monitoring the rainfall intensity and setting a rainfall intensity threshold; if a rainy day signal is detected and the monitored rainfall intensity is lower than the rainfall intensity threshold, the first outlet is opened, the third outlet is opened, and the fourth outlet is closed, and the sewage in the sewage branch pipe and the rainwater in the rainwater outlet are mixed in the combined pipe and flow into the municipal sewage pipe through the diversion facility and the third outlet; if a rainy day signal is detected and the monitored rainfall intensity is higher than the rainfall intensity threshold, the first outlet is closed, the third outlet is closed, and the fourth outlet is opened, and the rainwater in the rainwater outlet enters the combined pipe and flows into the municipal rainwater pipe through the diversion facility and the fourth outlet.

[0016] Optionally, the capacity of the municipal sewage pipe is also monitored, and a sewage pipe capacity threshold is set; when a rainy day signal is detected and the capacity of the monitored municipal sewage pipe is lower than the sewage pipe capacity threshold and the monitored rainfall intensity is lower than the rainfall intensity threshold, the first outlet is opened, the third outlet is opened, and the fourth outlet is closed, and the sewage from the sewage branch pipe and the rainwater from the rainwater outlet are mixed in the combined pipe and then flow into the municipal sewage pipe through the diversion facility and the third outlet;

[0017] When a rainy day signal is detected and the capacity of the monitored municipal sewage pipe is higher than the sewage pipe capacity threshold, the first outlet is closed, the third outlet is closed, and the fourth outlet is opened. The rainwater from the stormwater outlet flows into the combined pipe and then into the municipal stormwater pipe through the diversion facility and the fourth outlet.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] (1) In a drainage system based on a municipal road diversion pipe network of the present invention, a diversion facility is arranged on a combined pipe, and an interception part is arranged upstream of the diversion facility. On rainy days, the first outlet of the interception part is closed. At this time, the combined pipe is equivalent to a rainwater pipe. Rainwater flowing into the rainwater outlet is merged into the combined pipe and flows into the municipal rainwater pipe through the diversion facility. On sunny days, the first outlet of the interception part is opened. At this time, the domestic sewage transported by the combined pipe flows into the municipal sewage pipe through the diversion facility. The diversion of rainwater and sewage can be achieved within the unit area to avoid the mixing of sewage and rainwater. The combined pipe can achieve multiple uses, and the existing pipe network system does not need much modification, the modification cost is low, and the scope of application is wide.

[0020] (2) The present invention provides a drainage system based on a municipal road diversion pipe network with a first monitoring device to identify whether it is sunny or rainy. The controller automatically executes according to the set control logic, and the degree of automation is high.

[0021] (3) The drainage system based on the municipal road diversion pipe network of the present invention has multiple usage methods, and the usage method can be designed according to specific usage requirements. It is applicable to various environments. When the municipal sewage pipe has no capacity, runoff pollution can be ignored, or when the capacity is limited, runoff pollution can be considered as appropriate; or the sewage in the buffer part can be transported to the municipal sewage pipe in combination with the capacity of the municipal sewage pipe while considering the capacity of the buffer part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a system in which a septic tank is not provided in an embodiment.

[0023] Figure 2 Schematic diagram of a system for setting up a septic tank for an embodiment.

[0024] Figure 3 This is a flow chart of method 1 in Example 7.

[0025] Figure 4 This is a flow chart of method 2 in Example 7.

[0026] Figure 5 This is a flow chart of method three in Example 7.

[0027] Figure 6 This is a flow chart of method 4 in Example 7.

[0028] Figure 7 This is a flow chart of method five in Example 7.

[0029] Figure 8 This is a flow chart of method six in Example 7.

[0030] Fig. 9 This is a flow chart of method seven in Example 7.

[0031] Fig.10 for Figure 1-2 Schematic diagram of the structure of multiple interception parts.

[0032] Figure numerals: 1-combined pipe, 10-sewage branch pipe, 11-rain inlet, 12-municipal sewage pipe, 13-municipal rainwater pipe, 2-interception section, 3-diversion facility, 4-buffer section. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] It should be noted that, in order to explain the present invention in more detail so that those skilled in the art can understand the present invention more clearly and understandably, and further support the technical problems to be solved by the present invention and the corresponding technical effects that can be achieved, before introducing the present invention, the following explanations are given for the terminology involved:

[0035] Combined (branch) pipes are pipes used in unit area pipes to transport rainwater, sewage, or a mixture of rainwater and sewage; sewage branch pipes are pipes used in unit area pipes to transport sewage; municipal rainwater pipes are pipes used in municipal pipes to transport rainwater; municipal sewage pipes are pipes used in municipal pipes to transport sewage.

[0036] Those skilled in the art can understand that the above-mentioned "rainwater", "sewage" and "mixed water" are not limitations on the functions of "branch pipes", and "municipal rainwater" and "municipal sewage" are not limitations on the functions of "pipes", but are only used to distinguish. In other words, the combined branch pipe, sewage branch pipe, municipal rainwater pipe, and municipal sewage pipe can all use the same pipe, or different pipes, or partially the same and partially different pipes. The present invention does not limit this. As long as the pipe can realize liquid transportation, it is applicable to the present invention and is within the protection scope of the present invention.

[0037] As for the "dirty water" and "clean water" involved in the present invention, the "dirty water" can be understood as domestic sewage, or initial rain, or mixed water of domestic sewage and initial rain; "clean water" can be understood as mid-to-late rain. Specifically, for the rainfall period, the rain can be divided into initial rain and mid-to-late rain, and the division method can adopt the time method, water quality method or liquid level method in the prior art. For example, when the time method is adopted, the rain corresponding to the initial rainfall is the initial rain, and the rain corresponding to the mid-to-late rainfall is the mid-to-late rain; for example, when the water quality method is adopted, when the rainwater concentration is higher than a certain concentration threshold, the rainwater is the initial rain, and when the rainwater concentration is lower than a certain concentration threshold, the rainwater is the mid-to-late rain; for example, when the liquid level method is adopted, when the rainwater level is lower than a certain liquid level threshold, the rainwater is the initial rain, and when the rainwater level is higher than a certain liquid level threshold, the rainwater is the mid-to-late rain.

[0038] There is no limitation on which of the above methods is used to determine the initial rain or the mid-to-late rain, and the determination can be made according to actual operational requirements; in other words, any of the above methods for determining the initial rain or the mid-to-late rain is applicable to the present invention.

[0039] Of course, those skilled in the art should understand that since certain errors are allowed in the discharge of rainwater and / or sewage during actual operations, there may be certain errors in the specific division of each period. For example, there may be inaccurate division nodes between initial rain and mid- and late-stage rain, resulting in mid- and late-stage rain mixed with initial rain, or initial rain / mid- and late-stage rain mixed with a small amount of sewage, etc., so that there are errors in the division of "clean water" and "dirty water". The operational impact caused by this error does not affect the implementation effect of the entire technical solution of the present invention and can be ignored, and should not be considered to be beyond the protection scope of the present invention.

[0040] Example 1

[0041] See also Figure 1 As shown, the existing combined sewer network system has a sewage branch pipe 10, a rainwater inlet 11 and a combined pipe 1 located in a unit area. The water flowing out of the unit area enters the municipal sewage pipe 12 and the municipal rainwater pipe 13. The sewage branch pipe 10 and the rainwater inlet 11 in the unit area are respectively connected to the line of the combined pipe 1, and the sewage branch pipe 10 and the rainwater inlet 11 are connected in parallel to the line of the combined pipe 1; the unit area in this embodiment is a residential area, hospital, office building and other areas.

[0042] This embodiment provides a drainage system based on a municipal road diversion pipe network, which is a transformation of an existing combined pipe network system. The system includes:

[0043] The intercepting portion 2 is arranged near the access position where the sewage branch pipe 10 is connected to the combining pipe 1 or upstream of the access position. The intercepting portion 2 has an inlet and a first outlet. The inlet is connected to the sewage branch pipe 10, and the first outlet is connected to the combining pipe 1. A first hydraulic switch is provided to control the water flow through the first outlet. The intercepting portion 2 in this embodiment can be a well structure such as a gate well, an installation well, a diversion well, and an intercepting well. Multiple sewage branch pipes 10 in each unit area can be collected into one pipe connected to the combining pipe 1. The intercepting portion 2 can be arranged on the pipe connected to the combining pipe 1. Multiple sewage branch pipes 10 can be connected to the combining pipe 1 respectively. Then, the intercepting portion 2 can be arranged on each sewage branch pipe 10 or at the position connected to the combining pipe 1. Specifically, the position and number of the intercepting portions 2 can be modified and arranged according to the actual situation of the pipes in the existing unit area.

[0044] The diversion facility 3 has an inlet, a third outlet and a fourth outlet. The inlet of the diversion facility 3 is connected to the combined pipe 1, the third outlet is connected to the municipal sewage pipe 12, and the fourth outlet is connected to the municipal rainwater pipe 13. The diversion facility 3 is located downstream of the sewage branch pipe 10 and the rainwater outlet 11. The diversion facility 3 also has hydraulic switches for controlling the water flow through the third outlet and the fourth outlet, which are the third hydraulic switch and the fourth hydraulic switch. The diversion facility 3 is used to divert dirty water to the municipal sewage pipe 12 and clean water to the municipal rainwater pipe 13. The diversion facility 3 in this embodiment has a well body structure, and the well body is provided with an inlet and an outlet. The number and arrangement of the specific outlets can be adjusted according to actual conditions. As a preferred embodiment, the well body structure in this embodiment can be a concrete structure or an integrated steel structure.

[0045] Example 2

[0046] See also Figure 2 As shown, the existing combined sewer network system has a sewage branch pipe 10, a rainwater inlet 11, a sewage collection facility (such as a septic tank) and a combined pipe 1 located in a unit area. The septic tank outlet and the rainwater inlet 11 in the unit area are respectively connected to the line of the combined pipe 1, and the septic tank and the rainwater inlet 11 are connected in parallel to the line of the combined pipe 1; the unit area in this embodiment is a residential area, hospital, office building and other areas.

[0047] The difference between this embodiment 2 and embodiment 1 is that:

[0048] The intercepting portion 2 in the embodiment 1 is arranged between the sewage branch pipe 10 and the confluence pipe 1 or at the connection position between the sewage branch pipe and the confluence pipe 1;

[0049] The intercepting part 2 in the embodiment 2 is arranged between the septic tank outlet and the combined pipe 1 or at the connection part between the septic tank outlet and the combined pipe 1. The specific location of the intercepting part 2 is determined by the specific environment of the unit area, and can be freely and flexibly arranged.

[0050] Example 3

[0051] See also Figure 1 and Figure 2 As shown, based on Example 1 and Example 2, for the arrangement of the sewage branch pipe, the interception part and the sewage receiving facility:

[0052] Mode 1: the number of the sewage branch pipe is 1, the number of the intercepting part 2 is 1, and a sewage receiving facility is provided between the sewage branch pipe 10 and the intercepting part 2, and the inlet of the intercepting part 2 is connected to the outlet of the sewage receiving facility;

[0053] Mode 2: The number of the sewage branch pipes 10 is several, the number of the intercepting parts 2 and the number of the sewage receiving facilities are both adapted to the number of the sewage branch pipes 10, and a corresponding sewage receiving facility is provided between each of the sewage branch pipes 10 and a corresponding intercepting part 2, and the inlet of each intercepting part 2 is connected to the outlet of a corresponding sewage receiving facility;

[0054] Method three, the number of the sewage branch pipes 10 is several, the number of the intercepting parts 2 is compatible with the number of the sewage receiving facilities, and the number of the intercepting parts 2 or the number of the sewage receiving facilities are smaller than the number of the sewage branch pipes 10, a part of the sewage branch pipes 10 among the several sewage branch pipes 10 is connected to a corresponding one of the intercepting parts 2 through a sewage receiving facility, and each of the remaining part of the sewage branch pipes 10 is connected to a corresponding one of the intercepting parts 2 through a corresponding one of the sewage receiving facilities.

[0055] Method four, the number of the sewage branch pipes 10 is several, the number of the intercepting parts 2 and the sewage receiving facility are both one, and the several sewage branch pipes 10 are connected to a corresponding one of the intercepting parts 2 through one of the sewage receiving facilities.

[0056] Those skilled in the art will understand that the arrangement of the intercepting part, the sewage branch pipe and the sewage receiving facility can be selected according to actual operational requirements through which of the above-mentioned implementation modes; in other words, the present invention does not specifically limit the arrangement of the intercepting part, the sewage branch pipe and the sewage receiving facility. The above-mentioned four implementation modes, as well as similar implementation modes in the prior art, are all applicable to the present invention as long as they can achieve the technical effect that the sewage discharged from the unit area is first collected into the sewage receiving facility after passing through the sewage branch pipe and then discharged to the intercepting part by the sewage receiving facility, and are also within the protection scope of the present invention.

[0057] In addition, in this embodiment, the number and position of the intercepting parts 2 are not specifically limited, as long as sewage interception can be achieved.

[0058] Further, please combine Fig.10 As shown, in the present embodiment 1, 2 or 3, the intercepting part may be several (greater than or equal to 2), that is, when there are several unit areas, the drainage system may include:

[0059] A combined branch pipe 1, along which several sewage branch pipes 10 and rainwater inlets 11 in the several unit areas are connected respectively; several intercepting parts 2 adapted to the number of unit areas, each intercepting part 2 is connected to a sewage branch pipe, and is arranged near the access point where the sewage branch pipe 10 is connected to the combined branch pipe 1 or upstream of the access point, each intercepting part 2 has an inlet and a first outlet, the inlet is connected to the corresponding sewage branch pipe 10, and the first outlet is connected to the combined branch pipe 1 through a first hydraulic switch, and the first hydraulic switch controls the water flow of the first outlet. A sewage receiving facility is arranged between each sewage branch pipe 10 and a corresponding intercepting part 2, and the inlet of the intercepting part 2 is connected to the outlet of the sewage receiving facility.

[0060] Similarly, this method also includes a control system, which includes a first monitoring device and a controller, and the first monitoring device is connected to the controller signal; the controller is used to control the action of the water switch of the first outlet according to the rainfall signal; wherein, when a sunny signal is monitored, the first outlet of one or more interception parts 2 is controlled to be opened, and the dirty water flows into the combined branch pipe 1 through the first outlet; when a rainy signal is monitored, the first outlet of the interception part 2 is controlled to be closed, and the water flowing into the rainwater outlet 11 is gathered into the combined pipe.

[0061] In this way, by constructing a drainage system with the above-mentioned pipe network structure for multiple unit areas, the pipe networks in multiple unit areas can be interconnected, and the separation of rainwater and sewage in multiple unit areas can be achieved simultaneously, which has the characteristics of low cost and wide applicability.

[0062] Example 4

[0063] On the basis of the above-mentioned embodiments 1 to 3, if runoff pollution is taken into consideration, as a further preferred embodiment, the diversion facility 3 is also provided with a fifth outlet, and a fifth hydraulic switch for controlling water flow through the fifth outlet, the fifth outlet is connected to the initial rain storage tank or the rainwater treatment facility, the first, third and fourth hydraulic switches are closed, the first, third and fourth outlets are closed, the fifth hydraulic switch is opened, and the initial rainwater is diverted to the initial rain storage tank or the rainwater treatment facility; the first, third and fifth hydraulic switches are closed, the first, third and fifth outlets are closed, the fourth hydraulic switch is opened, and the middle and late rainwater is diverted to the municipal rainwater pipe 13.

[0064] Example 5

[0065] Based on Examples 1 to 4, the system also includes a controller and a first monitoring device, the first monitoring device is connected to the controller signal, the first monitoring device is used to monitor rainfall signals, and the controller is used to control the water switch actions of the first outlet, the third outlet, and the fourth outlet according to the rainfall signals.

[0066] The first monitoring device is at least one of a device for monitoring water level, a device for monitoring water quality, a device for monitoring rainfall, and a device for monitoring the total amount of water. Correspondingly, the rainfall signal is at least one of a water level signal, a water quality signal, a rainfall signal, and a total amount of water signal.

[0067] Further preferably, the control system further comprises a third monitoring device, which is used to monitor the capacity signal of the municipal sewage pipe 12, and the controller is used to control the hydraulic switch actions of the first outlet, the third outlet, and the fourth outlet according to the rainfall signal and the capacity signal. The third monitoring device in this embodiment is a liquid level meter disposed in the municipal sewage pipe 12, which determines whether the municipal sewage pipe 12 has capacity by monitoring the liquid level height in the municipal sewage pipe 12.

[0068] Further preferably, the control system further comprises a fourth monitoring device, which is used to monitor the rainfall intensity signal, and the controller is used to control the hydraulic switch actions of the first outlet, the third outlet, and the fourth outlet according to the rainfall signal and the rainfall intensity signal. The fourth monitoring device in this embodiment is the same device as the first monitoring device, and the rainfall intensity signal is converted from the signal monitored by the first monitoring device. If the first monitoring device is a rain gauge, the rainfall intensity can be converted from the rainfall monitored by the rain gauge. The fourth monitoring device can also be a separate device, which is specifically set according to actual use requirements.

[0069] The specific control logic is as follows: on sunny days, the first water switch is turned on, the first outlet is connected, the third water switch is turned on, the third outlet is connected, the fourth water switch is closed, the fourth outlet is intercepted, and the sewage in the unit area enters the municipal sewage pipe 12 through the sewage branch pipe 10, the municipal combined pipe 1, and the third outlet of the diversion facility 3;

[0070] On rainy days, the first water conservancy switch is closed, the first outlet is intercepted, the third water conservancy switch is closed, the third outlet is intercepted, the fourth water conservancy switch is opened, the fourth outlet is connected, and the rainwater flowing into the rainwater outlet 11 in the unit area is merged into the combined pipe 1, and enters the municipal rainwater pipe 13 through the fourth outlet of the diversion facility 3. In this embodiment, the signal monitored by the first monitoring device set above is used to determine whether it is a sunny day or a rainy day. Taking the first monitoring device as a rain gauge as an example, the rain gauge monitors the rainfall in the unit area, sets a rainfall threshold, and the condition that the monitored rainfall is higher than the rainfall threshold is a rainy day, otherwise it is a sunny day. The opening or closing of the first water conservancy switch, the second water conservancy switch and the fourth water conservancy switch introduced in this embodiment refers to their status on rainy days or sunny days.

[0071] Further preferably, when the municipal sewage pipe 12 has a capacity on rainy days, the unit area needs to consider runoff pollution. On rainy days, in the initial rainwater stage, the first hydraulic switch is closed, the first outlet is intercepted, the third hydraulic switch is opened, the third outlet is connected, the fourth hydraulic switch is closed, the fourth outlet is intercepted, and the initial rainwater converging from the rainwater outlet 11 in the unit area flows into the combined pipe 1 and enters the municipal sewage pipe 12 through the third outlet of the diversion facility 3; in the middle and late rainwater stage, the first hydraulic switch is closed, the first outlet is intercepted, the third hydraulic switch is closed, the third outlet is intercepted, the fourth hydraulic switch is opened, the fourth outlet is connected, and the middle and late rainwater flowing into the rainwater outlet 11 in the unit area flows into the combined pipe 1 and enters the municipal rainwater pipe 13 through the fourth outlet of the diversion facility 3. The initial rainwater in this embodiment refers to relatively dirty rainwater, and the middle and late rainwater refers to relatively clean rainwater, which is not specific to the time sequence of rainfall. In this embodiment, the capacity monitoring of the municipal sewage pipe 12 in this method is implemented using the capacity signal of the third monitoring device.

[0072] As a variation, when the municipal sewage pipe 12 has no capacity on rainy days, the diversion facility 3 is also provided with a fifth outlet, and a fifth hydraulic switch is provided near the fifth outlet, and the fifth outlet is connected to a rainwater storage tank or a rainwater treatment facility. On rainy days, in the initial rainwater stage, the first hydraulic switch, the third hydraulic switch and the fourth hydraulic switch are all closed, and the first outlet, the third outlet and the fourth outlet are all intercepted. The initial rainwater flowing into the rainwater outlet 11 in the unit area enters the combined pipe 1 and flows into the storage tank or the rainwater treatment facility through the fifth outlet of the diversion facility 3; in the middle and late rainwater stages, the first, third and fifth hydraulic switches are all closed, and the first, third and fifth outlets are all intercepted. The fourth hydraulic switch is opened, and the fourth outlet is connected. The middle and late rainwater flowing into the rainwater outlet 11 in the unit area converges into the combined pipe 1 and flows into the municipal rainwater pipe 13 through the fourth outlet of the diversion facility 3.

[0073] Further preferably, the control system also includes a fourth monitoring device, which is used to monitor the rainfall intensity signal, and the controller is used to control the hydraulic switch action of the first outlet, the third outlet, and the fourth outlet according to the rainfall signal and the rainfall intensity signal. The specific control logic is as follows: when the rainfall intensity is small, the first and third hydraulic switches are opened, the first and third outlets are opened, the fourth hydraulic switch is closed, and the fourth outlet is closed. After the sewage in the sewage branch pipe and the rainwater gathered at the rainwater outlet are mixed in the combined pipe, they are diverted to the municipal sewage pipe by the diversion facility; when the rainfall intensity is large, the first and third hydraulic switches are closed, the first and third outlets are closed, the fourth hydraulic switch is opened, the fourth outlet is opened, the sewage branch pipe and the combined pipe are cut off, and the rainwater gathered at the rainwater outlet enters the municipal rainwater pipe through the combined pipe and the fourth outlet of the diversion facility. The fourth monitoring device in this embodiment is the same device as the first monitoring device, and the rainfall intensity signal is converted from the signal monitored by the first monitoring device. If the first monitoring device is a rain gauge, the rainfall intensity can be converted according to the rainfall monitored by the rain gauge. The fourth monitoring device can also be a separate device, which is specifically set according to actual use requirements. Among them, a higher rainfall intensity means that the rainfall intensity is higher than the set rainfall intensity threshold, and a lower rainfall intensity means that the rainfall intensity is lower than the set rainfall intensity threshold. Therefore, the rainfall intensity is determined according to the set rainfall intensity threshold, and the setting of the rainfall intensity threshold is determined by the perennial rainfall environment of the unit area and the capacity of the sewage pipe, and this embodiment does not make any specific limitations.

[0074] It is suitable for long rainfall duration, such as more than 12 hours. If the first water conservancy switch is closed for a long time to intercept the sewage branch pipe 10, the pressure of the sewage branch pipe 10 is relatively high. In order to further solve the problem of high pressure in the sewage branch pipe 10, the first and third water conservancy switches can be opened when the rainfall intensity is small and the municipal sewage pipe 12 has a capacity, the first and third water conservancy switches can be opened, the first outlet and the third outlet can be connected, the fourth water conservancy switch can be closed, and the fourth outlet can be intercepted, so that part of the sewage in the sewage branch pipe 10 flows into the combined pipe 1, and a small amount of rainwater flows into the rainwater inlet 11 and mixes with sewage, then enters the combined pipe 1 and flows into the municipal sewage pipe 12 through the third outlet. This method not only relieves the pressure of the sewage branch pipe 10, but also makes full use of the resources of the municipal sewage pipe 12 and makes reasonable use of resources.

[0075] Example 6

[0076] On the basis of embodiments 1 to 5, a buffer part 4 is further provided, the first outlet of the intercepting part 2 is connected to the combined pipe 1, the second outlet of the intercepting part 2 is connected to the buffer part 4, and the buffer part 4 is used to buffer part of the domestic sewage flowing out of the septic tank. The buffer part 4 is used to store part of the domestic sewage on rainy days, and the rainwater flowing out of the rainwater outlet 11 is merged into the combined pipe 1, so that the domestic sewage is prevented from mixing into the rainwater. The rainwater is diverted to the municipal rainwater pipe 13 through the diversion facility 3, and the discharge of domestic sewage is delayed on rainy days, the control method is simple, and the treatment effect is good.

[0077] Further preferably, the intercepting portion 2 and the buffer portion 4 in the above scheme are combined into a storage pool with an integrated structure, a partition is arranged inside the storage pool to not divide the interior of the pool body into the intercepting portion 2 and the buffer portion 4, the second outlet is located on the partition, and an inlet and a first outlet are arranged on the pool body enclosing the intercepting portion 2.

[0078] In addition, the storage pool of the present embodiment is an excavated pool structure that is at least partially located underground, and an overflow wall is arranged in the pool structure. The buffer corridor enclosed by the front side of the dividing wall and the surrounding pool body is equivalent to the interception part 2, and the storage space enclosed by the rear side of the dividing wall and the surrounding pool body is equivalent to the buffer part 4, wherein a first outlet is arranged on one side wall of the buffer corridor, a water switch is arranged near the first outlet, and a second outlet is arranged on the dividing wall. If the dividing wall is an overflow wall, the overflow port of the overflow wall is the second outlet. As another method, a second outlet may also be arranged on the dividing wall, and a water switch, i.e., a second water switch, may be arranged near the second outlet. The specific operation and use are as follows: on sunny days, the first water switch near the first outlet is turned on, the first outlet is connected, and the domestic sewage from the septic tank flows into the combined pipe 1 from the first outlet of the buffer corridor; on rainy days, the first water switch near the first outlet is turned off, the first outlet is cut off, and the domestic sewage from the septic tank overflows from the overflow port above the overflow wall, that is, the second outlet, into the buffer part 4 for storage, or the second water switch is turned on to connect the second outlet, so that the domestic sewage on rainy days is stored in the buffer part 4, and the rainwater flowing out of the rainwater outlet 11 flows into the combined pipe 1. The control method is simple, the operability is strong, and the rainwater and sewage diversion can be achieved from the source.

[0079] Further preferably, in the above scheme, the interception part 2 and the buffer part 4 are split structures, the interception part 2 is a diversion well, an interception well or a discarded well, and the buffer part 4 is a pool structure or a tank body with a storage space. When the diversion well, the interception well or the discarded well adopts a weir structure or a slot weir structure, a first outlet and a second outlet are set on the well body of the diversion well, the interception well or the discarded well, and a hydraulic switch, i.e., a first hydraulic switch, can be installed only near the first outlet, and the second outlet is located downstream of the overflow weir in the well. Diversion wells, interception wells or discarded wells of other structures need to be provided with a second hydraulic switch near the second outlet to control the water passing through the second outlet. The interception part 2 and the buffer part 4 can be installed in appropriate areas according to the specific conditions of the use environment, which is flexible and convenient and has a wide range of applications.

[0080] Further preferably, the buffer part 4 and the intercepting part 2 in the above scheme can be connected to the outlet of a septic tank or the outlets of multiple septic tanks and the sewage branch pipe 10. Among them, the storage space of the buffer part 4 is designed according to the amount of sewage generated by the corresponding catchment area of ​​the septic tank and the sewage branch pipe 10 connected thereto, and the design is reasonable, and the resource allocation is combined.

[0081] It also includes a control system, which includes a first monitoring device and a controller. The first monitoring device is connected to the controller signal, the first monitoring device is used to monitor the rainfall signal, and the controller is used to control the water switch action of the first outlet, the third outlet and the fourth outlet according to the rainfall signal. If the second outlet is provided with a second water switch, the controller is used to control the water switch action of the first outlet, the second outlet, the third outlet and the fourth outlet according to the rainfall signal. The first monitoring device in this embodiment is at least one of a device for monitoring the liquid level of a water body, a device for monitoring the water quality of a water body, a device for monitoring the rainfall, and a device for monitoring the total amount of a water body; correspondingly, the rainfall signal is at least one of a water level signal, a water quality signal, a rainfall signal, and a water total amount signal.

[0082] Further preferably, in the present embodiment, the rainfall signal is a liquid level signal, and the device for monitoring the liquid level of the water body is a liquid level meter, which is arranged in the diversion facility 3. When rainfall occurs, the water level in the diversion facility 3 rises. Therefore, it is possible to determine whether rainfall has occurred by monitoring the liquid level value in the diversion facility 3. A liquid level threshold can be set. When the monitored liquid level value is higher than the liquid level threshold, the controller controls the first hydraulic switch near the first outlet to close, and the first outlet is cut off. If the second hydraulic switch is set at the second outlet, the second hydraulic switch is controlled to open, and the second outlet is turned on. At the same time, the third hydraulic switch is closed and the third outlet is closed, and the fourth hydraulic switch is opened and the fourth outlet is opened. Conversely, the controller controls the first hydraulic switch to open, and the first outlet is turned on. If the second hydraulic switch is set at the second outlet, the second hydraulic switch is controlled to close, and the second outlet is cut off. At the same time, the third hydraulic switch is opened and the third outlet is opened, and the fourth hydraulic switch is closed and the fourth outlet is cut off.

[0083] Preferably, in this embodiment, the rainfall signal is a water quality signal, and the device for monitoring the water quality of the water body is a COD sensor, which is arranged in the diversion facility 3. Because the pollutant concentration in the water is higher when there is no rainwater mixed in the diversion facility 3, when rainwater is mixed in, the sewage is diluted and the pollutant concentration is reduced. Therefore, it is possible to judge whether it will rain by monitoring the pollutant concentration value in the diversion facility 3, and a first pollutant concentration threshold can be set. When the monitored pollutant concentration value is lower than the pollutant concentration threshold, the controller controls the first hydraulic switch to close and the first outlet to be cut off. If the second hydraulic switch is set at the second outlet, the second hydraulic switch is controlled to open and the second outlet is turned on. At the same time, the third hydraulic switch is closed and the third outlet is closed, and the fourth hydraulic switch is opened and the fourth outlet is opened; conversely, the controller controls the first hydraulic switch to open and the first outlet is turned on. If the second hydraulic switch is set at the second outlet, the second hydraulic switch is controlled to close and the second outlet is cut off. At the same time, the third hydraulic switch is opened and the third outlet is opened, and the fourth hydraulic switch is closed and the fourth outlet is cut off.

[0084] Further preferably, in the present embodiment, the rainfall signal is a rainfall signal, and the device for monitoring rainfall is a rain gauge, which is generally arranged outside the diversion facility 3. The rain gauge can monitor whether it is raining and set a rainfall threshold. When the monitored rainfall value is greater than the rainfall threshold, the controller controls the first hydraulic switch to close and the first outlet to be cut off. If a second hydraulic switch is set at the second outlet, the second hydraulic switch is controlled to open and the second outlet is turned on. At the same time, the third hydraulic switch is closed and the third outlet is turned off, and the fourth hydraulic switch is opened and the fourth outlet is turned on. Conversely, the controller controls the first hydraulic switch to open and the first outlet is turned on. If a second hydraulic switch is set at the second outlet, the second hydraulic switch is controlled to close and the second outlet is cut off. At the same time, the third hydraulic switch is opened and the third outlet is turned on, and the fourth hydraulic switch is closed and the fourth outlet is cut off.

[0085] In addition, if the problem of water flow delay or runoff pollution in the pipeline is considered, timers, liquid level meters, COD sensors and other equipment can be set up to combine into rainfall-liquid level method, rainfall-water quality method, rainfall-time method, etc. Taking the rainfall-time method as an example, when the rainfall value is greater than the rainfall threshold, the timing starts, the first hydraulic switch is closed, the third hydraulic switch is opened, and the fourth hydraulic switch is closed. After a delay, the third hydraulic switch is controlled to be closed and the fourth hydraulic switch is opened. By analogy, multiple monitoring devices can be used in combination to achieve precise control of clean and dirty diversion.

[0086] Further preferably, the control system also includes a second monitoring device, which is used to monitor the liquid level height signal in the buffer part 4. The controller is used to control the hydraulic switch action of the first outlet, the third outlet and the fourth outlet according to the liquid level height signal and the rainfall signal. If the second outlet is provided with a hydraulic switch, it is also necessary to control the hydraulic switch action of the second outlet. The second monitoring device provided in this embodiment is a liquid level meter, which is installed in the buffer part 4 to monitor the liquid level height signal of the buffer part 4. In general, the volume of the buffer part 4 is designed as a reference based on the total amount of sewage generated by its corresponding catchment area during the peak period of sewage generation in the residential area during the three time periods of morning, noon and evening when there is more domestic sewage. The buffer part 4 can be vacated on sunny days or after the buffer part 4 is fully stored.

[0087] The specific control logic is as follows: when the monitored rainfall signal is a sunny day, the first outlet is opened, the third outlet is opened, and the fourth outlet is closed, so that the sewage that continuously enters the intercepting part 2 enters the diversion facility 3 and then enters the municipal sewage pipe 12; further, in order to rationally utilize the volume of the buffer part 4, when the monitored rainfall signal is a sunny day, the water in the buffer part 4 can be selectively pumped or gravity-drained into the intercepting part 2, flows out from the first outlet, enters the diversion facility 3, and then enters the municipal sewage pipe 12 to empty the buffer part 4.

[0088] In another preferred embodiment, the control system also includes a third monitoring device, which is used to monitor the capacity of the municipal sewage pipe 12 to obtain a capacity signal, and the controller is used to control the hydraulic switch actions of the first outlet, the third outlet and the fourth outlet according to the rainfall signal and the capacity signal.

[0089] For areas with serious runoff pollution, the diversion facility 3 intercepts part of the initial rainwater into the municipal sewage pipe 12, and intercepts the mid- and late-stage rainwater into the municipal rainwater pipe 13. The specific control system and control logic are as follows:

[0090] Taking the water quality monitoring method as an example, a water quality concentration threshold is set;

[0091] If rainfall is detected and the water quality concentration value is lower than the water quality concentration threshold, the first outlet is closed, the third outlet is closed, and the fourth outlet is opened, and the relatively clean water enters the municipal rainwater pipe 13; if rainfall is detected and the water quality concentration is higher than the water quality concentration threshold, and the municipal sewage pipe 12 has capacity, the first outlet is closed, the third outlet is opened, and the fourth outlet is closed, and the relatively dirty rainwater enters the municipal sewage pipe 12. On rainy days, clean rainwater is transported to the municipal rainwater pipe 13 regardless of whether the municipal sewage pipe 12 has capacity. Only when the municipal sewage pipe 12 has capacity, the relatively dirty rainwater is diverted to the municipal sewage pipe 12, and the treatment of runoff pollution is considered as much as possible, and resources are allocated reasonably.

[0092] Further preferably, the control system further comprises a fourth monitoring device, which is used to monitor the rainfall intensity signal, and the controller is used to control the hydraulic switch actions of the first outlet, the third outlet, and the fourth outlet according to the rainfall signal and the rainfall intensity signal. The fourth monitoring device in this embodiment is the same device as the first monitoring device, and the rainfall intensity signal is converted from the signal monitored by the first monitoring device. If the first monitoring device is a rain gauge, the rainfall intensity can be converted from the rainfall monitored by the rain gauge. The fourth monitoring device can also be a separate device, which is specifically set according to actual use requirements.

[0093] It is applicable to some special cases, such as when the continuous rainfall time exceeds twelve hours, and the buffer part 4 has reached the upper limit of the capacity during the rainfall process, if the discharge is carried out on a sunny day, the buffer part 4 and the septic tank may be flooded. Since it is relatively rare that the rainfall intensity is continuously high during the entire rainfall process, the buffer part 4 can be emptied or partially emptied or the sewage flowing out of the septic tank can be allowed to enter the combined pipe 1 when the rainfall intensity is low. The rainfall intensity of this embodiment can be obtained by monitoring the rainfall, and the specific operation method is as follows:

[0094] Taking rainfall as an example, a first rainfall threshold and a second rainfall threshold are set;

[0095] When the monitored rainfall is higher than the first rainfall threshold, the first outlet is closed, the third outlet is closed, and the fourth outlet is opened; when the liquid level of the buffer 4 is higher than the set liquid level threshold and the rainfall is higher than the first rainfall threshold and lower than the second rainfall threshold, the first outlet is opened, the third outlet is opened, and the fourth outlet is closed, and the sewage flowing out of the septic tank flows out from the first outlet into the diversion facility 3 and then sent to the sewage treatment facility 12 for treatment, thereby reducing the amount of sewage entering the buffer 4. Furthermore, if a second hydraulic switch is set, the second hydraulic switch can be opened, and the water gravity of the buffer 4 enters the interception part 2 and flows out from the first outlet into the diversion facility 3 and then sent to the sewage treatment facility 12. If there is no second hydraulic switch, the buffer 4 can be emptied by pumping, and the pumped water is also sent to the sewage treatment facility 12; if the liquid level of the buffer 4 is higher than the set liquid level threshold and the monitored rainfall value is higher than the second rainfall threshold, the first outlet can be closed, the third outlet can be closed, and the fourth outlet can be opened. The rainfall in this embodiment can also be replaced by other data converted from rainfall, such as rainfall intensity.

[0096] Furthermore, the first capacity threshold and the second capacity threshold may be set in combination with the capacity signal of the municipal sewage pipe monitored by the third monitoring device to transport domestic sewage to the municipal sewage pipe 12 during rainfall;

[0097] When the rain signal is detected and the capacity of the buffer section 4 is higher than the second capacity threshold and the capacity of the municipal sewage pipe is lower than the first capacity threshold, the first outlet of the intercepting section 2 is opened, the third outlet of the diversion facility 3 is opened, and the fourth outlet is closed, and the dirty water is diverted to the municipal sewage pipe through the first outlet, the diversion facility 3, and the third outlet. As a variation, the buffer section 4 can be emptied or partially emptied at this time, and the water in the buffer section 4 is gravity-flowed or pumped to the intercepting section 2 through the combined branch pipe 1, the diversion facility 3 and the third outlet to enter the municipal sewage pipe. It is also possible not to consider the sewage in the buffer section 4 flowing out and only reduce the continuous water inflow of the buffer section 4. If a second hydraulic switch is set, the second hydraulic switch can be closed, and the first and third hydraulic switches can be opened, and the water flowing out of the septic tank enters the sewage treatment facility 12 through the first outlet, the combined branch pipe 1, the diversion facility 3, and the third outlet.

[0098] Example 7

[0099] This embodiment 7 provides a drainage method for a combined sewer network, using the drainage system based on a municipal road diversion sewer network of the above embodiments 1 to 6, specifically including the following control methods:

[0100] Method 1, see Figure 3 As shown,

[0101] Monitor rainfall signals to determine whether it is raining;

[0102] If not, the first outlet of the intercepting part 2 is opened, the third outlet of the diversion facility 3 is opened, and the fourth outlet is closed, and the dirty water on sunny days is diverted to the municipal sewage pipe 12 through the first outlet, the combined pipe 1, the diversion facility 3, and the third outlet;

[0103] If so, the first outlet of the interception part 2 is closed, the third outlet of the diversion facility 3 is closed, and the fourth outlet is opened, and the clean water is diverted to the municipal rainwater pipe 13 through the diversion facility 3 and the fourth outlet. At this time, if a second hydraulic switch is set, the second hydraulic switch is opened, and the domestic sewage flowing out of the septic tank enters the buffer part 4 for storage, and the sewage in the buffer part 4 is sent to the municipal sewage pipe 12 when it is sunny or the municipal sewage pipe 12 has the receiving capacity. The separation of rainwater and sewage is achieved upstream of the combined pipe 1, and the discharge of domestic sewage on rainy days is delayed. The modification of the existing pipe network system is not large, and the clean and dirty diversion of the combined pipe 1 can be achieved.

[0104] Method 2, see Figure 4 As shown,

[0105] On the basis of method 1, after rainfall is detected, the rainfall intensity signal is further monitored to determine whether the rainfall intensity is greater than the set rainfall intensity;

[0106] If not, the first outlet of the intercepting part 2 is opened, the third outlet of the diversion facility 3 is opened, and the fourth outlet is closed, and the dirty water in the sewage branch pipe is diverted to the municipal sewage pipe 12 through the first outlet, the confluence pipe 1, the diversion facility 3, and the third outlet; preferably, the water in the buffer part 4 is gravity-drained or pumped into the intercepting part 2;

[0107] If yes, the first outlet of the interception part 2 is closed, the third outlet of the diversion facility 3 is closed, and the fourth outlet is opened, and the clean water is diverted to the municipal rainwater pipe 13 through the diversion facility 3 and the fourth outlet. At this time, if a second water switch is set, the second water switch is opened, and the domestic sewage flowing out of the septic tank enters the buffer part 4 for storage.

[0108] This method 2 is suitable for situations where the capacity of sewage branch pipes or buffer sections is limited. When the rainfall intensity is low, as much space as possible should be freed up to provide safety guarantees for subsequent system operations.

[0109] Method 3, see Figure 5 As shown,

[0110] On the basis of method 2, when the monitored rainfall intensity is lower than the set rainfall intensity, the municipal sewage pipe is further monitored to see if it has capacity;

[0111] If not, the first outlet of the interception part 2 is closed, the third outlet of the diversion facility 3 is closed, and the fourth outlet is opened, and the clean water is diverted to the municipal rainwater pipe 13 through the diversion facility 3 and the fourth outlet. At this time, if a second water switch is set, the second water switch is opened, and the domestic sewage flowing out of the septic tank enters the buffer part 4 for storage;

[0112] If so, the first outlet of the intercepting part 2 is opened, the third outlet of the diversion facility 3 is opened, and the fourth outlet is closed. The dirty water on a sunny day is diverted to the municipal sewage pipe 12 through the first outlet, the combining pipe 1, the diversion facility 3, and the third outlet; preferably, the water in the buffer part 4 is discharged into the intercepting part 2 by gravity or pump.

[0113] This method three further ensures the drainage safety of the pipeline network, comprehensively considers that the pipeline network system can operate effectively, and empties or partially empties the sewage branch pipe or buffer part when the municipal sewage pipe has capacity and the rainfall intensity is small, so as to preserve the water storage capacity and have a higher safety factor.

[0114] Method 4, see Figure 6 As shown,

[0115] On the basis of method 2, when the rainfall intensity is detected to be lower than the set rainfall intensity, the buffer is further monitored to see whether it has capacity;

[0116] If not, the first outlet of the intercepting part 2 is opened, the third outlet of the diversion facility 3 is opened, and the fourth outlet is closed. The dirty water in the sewage branch pipe is diverted to the municipal sewage pipe 12 through the first outlet, the confluence pipe 1, the diversion facility 3, and the third outlet. The purpose is to reduce the water inflow into the buffer part and reserve the volume of the buffer part; as a preferred embodiment, the water in the buffer part 4 can be gravity-drained or pumped into the intercepting part 2 at this time, and part of it is emptied;

[0117] If yes, the first outlet of the interception part 2 is closed, the third outlet of the diversion facility 3 is closed, and the fourth outlet is opened, and the clean water in the combined pipe is diverted to the municipal rainwater pipe 13 through the diversion facility 3 and the fourth outlet. At this time, if a second water switch is set, the second water switch is opened, and the domestic sewage flowing out of the septic tank enters the buffer part 4 for storage.

[0118] This method four takes into account the actual operation conditions in combination with rainfall intensity and interception capacity, and further aims to preserve space for sewage branches and buffers, continue to maintain water storage capacity, and not build larger buffers, thus making rational use of resources.

[0119] Method 5, see Figure 7 As shown,

[0120] On the basis of method 4, if it is detected that the buffer has no capacity, further monitor whether the municipal sewage pipe has capacity;

[0121] If the municipal sewage pipe has capacity, the first outlet of the intercepting part 2 is opened, the third outlet of the diversion facility 3 is opened, and the fourth outlet is closed. The dirty water in the sewage branch pipe is diverted to the municipal sewage pipe 12 through the first outlet, the confluence pipe 1, the diversion facility 3, and the third outlet. The purpose is to reduce the water inflow into the buffer part and reserve the volume of the buffer part. As a preferred embodiment, the water in the buffer part 4 can be discharged by gravity or pumped into the intercepting part 2 at this time, and part of it is emptied;

[0122] If there is no flow in the municipal sewage pipe, the first outlet of the interception part 2 is closed, the third outlet of the diversion facility 3 is closed, and the fourth outlet is opened, and the clean water in the combined pipe is diverted to the municipal rainwater pipe 13 through the diversion facility 3 and the fourth outlet.

[0123] This method five combines the capacity of the pipe network and the buffer section, ensuring the safety of the pipe network drainage system while maintaining the subsequent water storage capacity of the buffer section, controlling relatively confluence and providing high safety.

[0124] Method 6, see Figure 8 As shown,

[0125] Based on method 1, rainfall is detected and further monitored to see whether the rainfall signal reaches the set rainfall signal threshold.

[0126] If no, the first outlet of the intercepting part 2 is closed, the third hydraulic switch of the diversion facility is opened, the fourth outlet is opened, the fourth hydraulic switch is closed, the fourth outlet is closed, and the initial rainwater in the combined pipe is diverted to the municipal sewage pipe or the initial rain storage tank or the rainwater treatment facility;

[0127] If yes, close the first outlet of the interception part 2, close the third hydraulic switch of the diversion facility, close the third outlet, open the fourth hydraulic switch, open the fourth outlet, and divert the middle and late rainwater in the combined pipe to the municipal rainwater pipe.

[0128] Method 7, see Fig. 9 As shown,

[0129] Based on method 7, if the monitored rainfall signal does not reach the set rainfall signal threshold, further monitor whether the municipal sewage pipe has capacity.

[0130] If not, close the first outlet of the interception part 2, close the third hydraulic switch of the diversion facility, close the third outlet, open the fourth hydraulic switch, open the fourth outlet, and divert the initial rainwater in the combined pipe to the municipal rainwater pipe.

[0131] If yes, close the first outlet of the interception part 2, open the third hydraulic switch of the diversion facility, open the fourth outlet, close the fourth hydraulic switch, close the fourth outlet, and divert the initial rainwater in the combined pipe to the municipal sewage pipe.

[0132] In the above methods six and seven, considering the problem of runoff pollution, the initial rainwater is diverted to the municipal sewage pipe, and the mid- and late-stage rainwater is diverted to the municipal stormwater pipe. Whether it is initial rainwater or mid- and late-stage rainwater can be determined based on the liquid level method, water quality method, rainfall method, total amount method, time method and other methods. No specific limitation is made in this embodiment, and the division by rainfall time is not limited. The monitored rainfall signal is a liquid level signal, a water quality signal, a rainfall signal, a time signal, etc. The "monitored rainfall signal reaches the set rainfall signal threshold" in the above method can correspond to a water quality signal, and the water quality data is converted into an inverse to meet the conditions. Other conditions can also be set to meet the identification of initial rainwater and mid- and late-stage rainwater, and the corresponding diversion.

[0133] For those skilled in the art, the hydraulic switches in Examples 1 to 2 may be gates, weir gates, valves, gate valves, air bags, air pillows, pipe clamp valves or flexible intercepting devices, and may be any device that can achieve the opening or closing of the outlet.

[0134] For those skilled in the art, the water switch being turned on in the embodiments 1 and 2 means that water flows through the water switch, and correspondingly, the water switch being turned off means that no water flows through the water switch.

[0135] For those skilled in the art, the monitoring equipment, controller and other electrical components used in Examples 1 to 2 do not specifically limit the models of the electrical components in this embodiment. Please refer to the selection manual of the corresponding equipment for selection in actual application.

[0136] For those skilled in the art, the higher or lower than used in the control logic of embodiments 1 to 2 may or may not include the present number, and is specifically set according to programming requirements.

[0137] For those skilled in the art, the thresholds set in Examples 1 to 2, such as the water quality concentration threshold, can be direct data (implementation monitoring data) or indirect data (the inverse of the data converted by the converter), as long as the corresponding operational purpose can be met.

[0138] Those skilled in the art may make various modifications and variations to the embodiments of the present invention. If these modifications and variations are within the scope of the claims of the present invention and their equivalents, these modifications and variations are also within the protection scope of the present invention.

[0139] The contents not described in detail in the specification are prior art known to those skilled in the art.

Claims

1. A drainage system based on a municipal road diversion pipe network, the municipal road diversion pipe network comprising a municipal sewage pipe and a municipal rainwater pipe; characterized in that: The drainage system comprises: A combined pipe (1), along which sewage branches (10) and rainwater inlets (11) in the unit area are respectively connected; The intercepting portion (2) is arranged near the connection point where the sewage branch pipe (10) connects to the confluence pipe (1) or upstream of the connection point, the intercepting portion (2) having an inlet and a first outlet, the inlet being connected to the sewage branch pipe (10), the first outlet being connected to the confluence pipe (1), and a first hydraulic switch being arranged to control water flow through the first outlet; A diversion facility (3), the diversion facility (3) having an inlet, a third outlet and a fourth outlet, the inlet of the diversion facility (3) being connected to the combined pipe (1), the third outlet being connected to the municipal sewage pipe (12), the fourth outlet being connected to the municipal rainwater pipe (13), and the diversion facility (3) being located downstream of the sewage branch pipe (10) and the rainwater outlet (11), the diversion facility (3) also having a hydraulic switch for controlling water flow through the third outlet and the fourth outlet respectively, and the diversion facility (3) being used to divert dirty water to the municipal sewage pipe (12) and to divert clean water to the municipal rainwater pipe (13); A sewage receiving facility is provided between the sewage branch pipe (10) and the intercepting portion (2), and the inlet of the intercepting portion (2) is connected to the outlet of the sewage receiving facility; Or, a plurality of the sewage branch pipes (10) correspond to a plurality of the sewage receiving facilities, and the inlet of each of the intercepting portions (2) is connected to the outlet of a corresponding sewage receiving facility; The interception part (2) is a diversion well, an interception well, a discarding well, a buffer gallery or an installation well; It also includes a control system, the control system includes a first monitoring device and a controller, the first monitoring device is connected to the controller by signal, the first monitoring device is used to monitor rainfall signals, and the controller is used to control the water switch actions of the first outlet, the third outlet, and the fourth outlet according to the rainfall signals; The control system further comprises a third monitoring device, the third monitoring device being used to monitor a capacity signal of the municipal sewage pipe (12); The control system further comprises a fourth monitoring device, and the fourth monitoring device is used to monitor the rainfall intensity in the unit area.

2. The drainage system based on the municipal road diversion pipe network as claimed in claim 1, characterized in that: The first monitoring device is at least one of a device for monitoring the liquid level of a water body, a device for monitoring the water quality of a water body, a device for monitoring the rainfall, and a device for monitoring the total amount of water; Correspondingly, the rainfall signal is at least one of a water body level signal, a water body water quality signal, a rainfall signal, and a water body total amount signal.

3. A drainage method based on a municipal road diversion pipe network, applicable to the drainage system according to any one of claims 1 to 2, characterized in that: The details are as follows: When a clear weather signal is detected, the first outlet of the intercepting portion (2) is opened, the third outlet of the diversion facility (3) is opened, and the fourth outlet is closed, and the dirty water is diverted to the municipal sewage pipe (12) through the first outlet, the combined pipe (1), the diversion facility (3), and the third outlet; When a rainy day signal is detected, the first outlet of the intercepting portion (2) is closed, the third outlet of the diversion facility (3) is closed, and the fourth outlet is opened, and the water flowing into the rainwater outlet (11) is gathered into the confluence pipe (1) and diverted to the municipal rainwater pipe (13) through the diversion facility (3) and the fourth outlet; The method further comprises: monitoring rainfall intensity and setting a rainfall intensity threshold; If a rainy day signal is detected and the detected rainfall intensity is lower than the rainfall intensity threshold, the first outlet is opened, the third outlet is opened, and the fourth outlet is closed, and the sewage from the sewage branch pipe (10) and the rainwater from the rainwater outlet (11) are mixed in the combined pipe (1) and then flow into the municipal sewage pipe (12) through the diversion facility (3) and the third outlet; If a rainy day signal is detected and the detected rainfall intensity is higher than the rainfall intensity threshold, the first outlet is closed, the third outlet is closed, and the fourth outlet is opened, and rainwater from the rainwater outlet (11) enters the combined pipe (1) and flows into the municipal rainwater pipe (13) through the diversion facility (3) and the fourth outlet; It also monitors the capacity of municipal sewers (12) and sets sewer capacity thresholds; When a rainy day signal is detected and the capacity of the monitored municipal sewage pipe (12) is lower than the sewage pipe capacity threshold and the monitored rainfall intensity is lower than the rainfall intensity threshold, the first outlet is opened, the third outlet is opened, and the fourth outlet is closed, and the sewage from the sewage branch pipe (10) and the rainwater from the rainwater outlet (11) are mixed in the combined pipe (1) and then flow into the municipal sewage pipe (12) through the diversion facility (3) and the third outlet; When a rainy day signal is detected and the capacity of the monitored municipal sewage pipe (12) is higher than the sewage pipe capacity threshold, the first outlet is closed, the third outlet is closed, and the fourth outlet is opened, and rainwater from the rainwater outlet (11) flows into the combined pipe (1) and then flows into the municipal rainwater pipe (13) through the diversion facility (3) and the fourth outlet.

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