Intelligent automatic sewage interception system and sewage interception method for urban underground culvert

Abstract

The present invention protects an intelligent automatic sewage interception system and method for urban underground culverts, which mainly detects the water level height through an ultrasonic level meter and transmits the water level value to an intelligent light column display, which controls the opening or closing of an electric sewage valve. During the non-flood season, the electric sewage valve remains open, and the sewage in the culvert is intercepted through the sewage interception trough sewage pipe and enters the urban sewage pipe network system to prevent sewage from entering the downstream; during the flood season, the electric sewage valve is closed, sewage interception stops, and rainwater in the culvert enters the downstream river channel, preventing a large amount of combined water from entering the sewage pipe network and avoiding increasing the operating load of the sewage treatment plant. The present invention realizes intelligent automatic sewage interception through the joint action of an ultrasonic level meter, an intelligent light column display, and an electric sewage valve, ensuring that sewage interception is stopped during the flood season and opened during the non-flood season.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to an intelligent automatic sewage interception system and a sewage interception method for urban underground culverts. Background Art

[0002] In recent years, with the continuous improvement and enhancement of people's living standards, people have higher and higher requirements for the surrounding living environment, especially urban rivers. However, due to the impact of human activities, the water environment pollution of most urban rivers is becoming increasingly serious, turning clear water rivers into urban stinking ditches, and water environment problems are becoming increasingly prominent. People are eager to urgently manage rivers.

[0003] The formation of black and smelly water bodies in cities is mainly due to the direct discharge of domestic sewage into rivers, which causes the water environment capacity to far exceed the water body's ability to absorb pollution and purify itself, ultimately leading to water deterioration and odor.

[0004] At present, the main measures for water environment governance include source control and pollution interception, and pollution interception and management along river banks, and the governance results are quite significant.

[0005] However, due to historical issues, there are a large number of underground culverts in the city. All sewage along the lines is directly discharged into the culverts and eventually flows into the downstream rivers, seriously polluting the river water. Summary of the invention

[0006] The embodiments of the present invention provide an intelligent automatic sewage interception system and method for urban underground culverts, the first purpose of which is to solve the problem of increased operating load of sewage treatment plants caused by indiscriminate treatment of urban underground culvert sewage; the second purpose is to prevent sewage from entering the downstream open river channel.

[0007] In order to solve the above technical problems, the present invention provides an intelligent automatic sewage interception system for urban underground culverts, wherein a primary sludge trough, a secondary sludge trough and a sewage interception trough are arranged in sequence from upstream to downstream in the culvert body, all of which are perpendicular to the water flow direction, an ultrasonic level meter facing the sewage interception trough is arranged in the culvert body, at least one valve well is arranged on the side of the culvert body, and a sewage interception pipe connected to the sewage interception trough is laid in the valve well, and the sewage interception pipe leads to the sewage pipe network;

[0008] An electric sewage valve located in a valve well is serially connected to the sewage interception pipe. The electric sewage valve is electrically connected to an intelligent light column display fixed on the wall of the valve well. The intelligent light column display is electrically connected to an ultrasonic liquid level meter.

[0009] Furthermore, the sewage interception pipe is composed of two sections of pipes connected by an electric sewage valve, namely an upstream sewage interception pipe located upstream of the electric sewage valve and a downstream sewage interception pipe located downstream of the electric sewage valve. One end of the upstream sewage interception pipe is connected to the water inlet of the electric sewage valve, and the other end penetrates through the well wall of the valve well and extends into the culvert wall of the culvert to be connected with the sewage interception trough. One end of the downstream sewage interception pipe is connected to the water outlet of the electric sewage valve, and the other end penetrates through the well wall of the valve well to lead to the sewage pipe network.

[0010] Preferably, at least one pipe expansion joint is connected in series between the upstream sewage interception pipe and the water inlet of the electric sewage valve.

[0011] Furthermore, a waterproof sleeve mounted on the wall of the upstream sewage interception pipe is provided between the outer pipe wall of the upstream sewage interception pipe and the culvert wall of the concealed culvert, and between the outer pipe wall of the upstream sewage interception pipe and the wall of the valve well, and a waterproof sleeve mounted on the wall of the downstream sewage interception pipe is provided between the outer pipe wall of the downstream sewage interception pipe and the wall of the valve well.

[0012] Preferably, a fixed bracket is installed on the culvert wall of the culvert body, the ultrasonic liquid level meter is fixed on the fixed bracket, and the ultrasonic liquid level meter is close to the culvert top of the culvert body.

[0013] Furthermore, an inspection hole is provided on the top of the culvert, and the inspection hole is located downstream of the sewage interception chute.

[0014] Preferably, ladders are provided in the culvert below the inspection hole and in the valve well.

[0015] Furthermore, the primary sludge trough, secondary sludge trough and sewage interception trough are all sunken troughs, the bottom of the trough is lower than the bottom plate elevation of the culvert, and the top of the trough is flush with the bottom plate elevation of the culvert; the bottom of the valve well is lower than the bottom of the sewage interception trough, and a pier is provided directly below the electric sewage valve.

[0016] Preferably, a sump is provided at the bottom of the valve well, and the sump is located directly below the downstream sewage interception pipe.

[0017] The present invention also protects a method for intercepting sewage using an intelligent automatic sewage interception system for an urban underground culvert, comprising the following steps:

[0018] Step S1, connect the ultrasonic level meter, the electric sewage valve and the intelligent light column display instrument to each other and complete the debugging;

[0019] Step S2, setting the liquid level point D and the liquid level point H on the intelligent light column display, the liquid level point D is higher than the liquid level point H, wherein the point D is the switch start point, and the setting basis is the maximum sewage design liquid level value in the culvert + 0.10m, and the point H is the switch stop point, and the setting basis is the maximum sewage design liquid level value in the culvert;

[0020] Step S3, keep the electric sewage valve open, the sewage flows from the culvert through the primary sludge tank and the secondary sludge tank in sequence, enters the interception tank, and then passes through the upstream interception pipe to the electric sewage valve. If it rains or floods, the water level in the culvert continues to rise. When the water level reaches the liquid level point D, the intelligent light column display outputs a valve closing signal to the electric sewage valve, and the electric sewage valve is closed to stop intercepting sewage;

[0021] Step S4, if the rainfall decreases or it is not the flood season, the water level in the culvert will continue to decrease until it drops to the liquid level point H. The intelligent light column display will output a valve opening signal to the electric sewage valve, and the electric sewage valve will open to start sewage interception.

[0022] The beneficial effects of the present invention are as follows:

[0023] The present invention protects an intelligent automatic sewage interception system and method for urban underground culverts, which mainly detects the water level height through an ultrasonic level meter and transmits the water level value to an intelligent light column display, which controls the opening or closing of an electric sewage valve. During the non-flood season, the electric sewage valve remains open, and the sewage in the culvert is intercepted through the sewage interception trough sewage pipe and enters the urban sewage pipe network system to prevent sewage from entering the downstream; during the flood season, the electric sewage valve is closed, sewage interception stops, and rainwater in the culvert enters the downstream river channel, preventing a large amount of combined water from entering the sewage pipe network and avoiding increasing the operating load of the sewage treatment plant. The present invention realizes intelligent automatic sewage interception through the joint action of an ultrasonic level meter, an intelligent light column display, and an electric sewage valve, ensuring that sewage interception is stopped during the flood season and opened during the non-flood season.

[0024] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a plan view of an intelligent automatic sewage interception system for urban underground culverts.

[0026] Figure 2 It is a schematic diagram of the downstream flow direction of the intelligent automatic sewage interception system for urban underground culverts.

[0027] Figure 3 It is a schematic diagram of the vertical water flow direction of the intelligent automatic sewage interception system for urban underground culverts.

[0028] Description of reference numerals:

[0029] 1. Primary sludge tank; 2. Secondary sludge tank; 3. Sewage interception tank; 4. Inspection hole; 5. Ultrasonic level meter; 6. Waterproof casing; 7. Sewage interception pipe; 8. Valve well; 9. Fixed bracket; 10. Ladder; 11. Intelligent light column display; 12. Electric sewage valve; 13. Pipe expansion joint; 14. Concealed culvert; 15. Pier; 16. Sump;

[0030] 701. Upstream sewage interception pipe; 702. Downstream sewage interception pipe. DETAILED DESCRIPTION

[0031] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0032] It should be noted that, in the present invention, the up, down, left and right in the figure are regarded as the up, down, left and right of the intelligent automatic sewage interception system for urban underground culverts described in this specification.

[0033] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0034] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0035] First embodiment

[0036] The first embodiment of the present invention relates to an intelligent automatic sewage interception system for urban underground culverts, such as Figure 1 , Figure 2 and Figure 3 As shown, a primary sedimentation tank 1, a secondary sedimentation tank 2 and a sewage interception tank 3 are sequentially arranged in the culvert body 14 from upstream to downstream, all of which are perpendicular to the water flow direction. An ultrasonic level meter 5 facing the sewage interception tank 3 is arranged in the culvert body 14. At least one valve well 8 is arranged beside the culvert body 14. A sewage interception pipe 7 connected to the sewage interception tank 3 is laid in the valve well 8, and the sewage interception pipe 7 leads to the sewage pipe network inspection well.

[0037] An electric sewage valve 12 located in the valve well 8 is serially connected to the sewage interception pipe 7 . The electric sewage valve 12 is electrically connected to an intelligent light column display 11 fixed to the wall of the valve well 8 . The intelligent light column display 11 is electrically connected to the ultrasonic liquid level meter 5 .

[0038] The working principle or working process of the intelligent automatic sewage interception system for urban underground culverts is as follows:

[0039] The ultrasonic level meter 5, the electric sewage valve 12 and the intelligent light column display 11 are connected by signal and debugged; the liquid level point D and the liquid level point H are set on the intelligent light column display 11, and the liquid level point D is higher than the liquid level point H, wherein the point D is the switch start point, and the setting basis is the maximum sewage design liquid level value in the culvert 14 + 0.10m, and the point H is the switch stop point, and the setting basis is the maximum sewage design liquid level value in the culvert 14; keep the electric sewage valve 12 open, and the sewage flows from the culvert 14 through The sewage interception pipe 7 enters the sewage network. If it rains or it is a flood season, the water level in the culvert 14 will continue to rise. When the water level reaches the liquid level point D, the intelligent light column display 11 outputs a valve closing signal to the electric sewage valve 12, and the electric sewage valve 12 closes to stop intercepting sewage. If the rainfall decreases or it is not a flood season, the water level in the culvert 14 will continue to decrease until it drops to the liquid level point H. The intelligent light column display 11 outputs a valve opening signal to the electric sewage valve 12, and the electric sewage valve 12 opens to start intercepting sewage.

[0040] Specifically, the ultrasonic level meter 5 sends ultrasonic pulse waves and detects echoes to the sewage interception tank 3 through a probe. If there is sludge deposition in the sewage interception tank 3, the detected liquid level will be inaccurate. Therefore, the present invention sets a primary sludge tank 1 and a secondary sludge tank 2 before the sewage interception tank 3, so that a large amount of solid particles in the sewage can be precipitated into the sludge tank, preventing the solid particles in the sewage from being deposited in the sewage interception tank, and avoiding the influence of sludge deposition on the real-time monitoring of the ultrasonic level meter 5.

[0041] The main function of the sewage interception pipe 7 is to intercept sewage. During the non-flood season (non-rainfall), the sewage in the culvert 14 flows through the sewage interception pipe 7 into the urban sewage pipe network system and is finally treated in the sewage treatment plant. Since it is the non-flood season, the culvert 14 is full of sewage, there is no surface runoff, and the water volume is small. The sewage is intercepted and enters the sewage treatment plant for treatment; during the flood season (rainfall), a large amount of rainwater converges into the culvert 14 to dilute the sewage. If it still enters the urban sewage pipe network system at this time, a large amount of combined water enters the sewage pipe network, which will inevitably increase the operating load of the sewage treatment plant and exceed the treatment load capacity of the sewage plant. Therefore, the sewage interception pipe 7 must be closed to prevent the combined water from entering the sewage pipe network.

[0042] In this embodiment, the preferred model is MIK-2100-HX intelligent light column display.

[0043] The water level height is detected by the ultrasonic level meter 5, and the water level value is transmitted to the intelligent light column display 11. The intelligent light column display 11 controls the opening or closing of the electric sewage valve 12. During the non-flood season, the electric sewage valve 12 is opened to start sewage interception, and the sewage in the culvert is diverted into the urban sewage pipe network system; during the flood season, the electric sewage valve 12 is closed, sewage interception stops, and all rainwater in the culvert enters the downstream river, preventing a large amount of combined water from entering the sewage pipe network and avoiding increasing the operating load of the sewage treatment plant.

[0044] The present invention realizes intelligent automatic sewage interception through the joint action of an ultrasonic level meter, an intelligent light column display instrument and an electric sewage valve, ensures that sewage interception is stopped during the flood season and started during the non-flood season, and reduces the operating load of the sewage treatment plant.

[0045] The ultrasonic liquid level meter 5 and the intelligent light column display 11 are both existing structures that can be purchased on the market. The ultrasonic liquid level meter 5, the intelligent light column display 11, and the electric sewage valve 12 can be connected wirelessly or wired, such as by cable. The specific connection method depends on the purchased ultrasonic liquid level meter 5, the intelligent light column display 11, and the electric sewage valve 12. In the present invention, the specific connection method is not limited.

[0046] Second embodiment

[0047] Based on the first implementation mode, Figure 3 The sewage interception pipe 7 is composed of two sections of pipes connected through the electric sewage valve 12, namely an upstream sewage interception pipe 701 located upstream of the electric sewage valve 12 and a downstream sewage interception pipe 702 located downstream of the electric sewage valve 12. One end of the upstream sewage interception pipe 701 is connected to the water inlet of the electric sewage valve 12, and the other end penetrates the wall of the valve well 8 and extends into the culvert wall of the culvert body 14 to be connected with the sewage interception groove 3. One end of the downstream sewage interception pipe 702 is connected to the water outlet of the electric sewage valve 12, and the other end penetrates the wall of the valve well 8 to lead to the sewage pipe network.

[0048] Specifically, refer to Figure 3 The sewage intercepting pipe 7 is divided into two sections to facilitate the installation of the electric sewage valve 12, and is also convenient for disassembly and maintenance.

[0049] In order to compensate for the expansion and contraction deformation of the absorption pipe caused by axial, lateral and angular heating, at least one pipe expansion joint 13 is connected in series between the upstream sewage interception pipe 701 and the water inlet of the electric sewage valve 12. In addition, the expansion joint 13 also facilitates the disassembly and installation of the sewage interception pipe 7.

[0050] Since the sewage must flow through the connecting transition section of the upstream and downstream pipelines, in order to prevent water seepage or even overflow, a waterproof casing 6 is provided between the outer pipe wall of the upstream sewage interception pipe 701 and the culvert wall of the culvert 14, and between the outer pipe wall of the upstream sewage interception pipe 701 and the wall of the valve well 8. A waterproof casing 6 is provided between the outer pipe wall of the downstream sewage interception pipe 702 and the wall of the valve well 8.

[0051] Third embodiment

[0052] When installing an ultrasonic level meter, the blind spot of the ultrasonic level meter must be considered. When the liquid level enters the blind spot, the ultrasonic transmitter cannot measure the liquid level. Therefore, when determining the range of the ultrasonic level meter, a 50 cm margin must be left. During installation, the transmitter probe must be about 50 cm higher than the highest liquid level.

[0053] The above are the issues that need to be paid attention to when installing an ultrasonic level meter. In order to meet the above requirements and avoid the impact of sludge deposition on real-time monitoring of the ultrasonic level, a fixed bracket 9 is installed on the culvert wall of the culvert body 14, and the ultrasonic level meter 5 is fixed to the fixed bracket 9, and the ultrasonic level meter 5 is close to the culvert top of the culvert body 14.

[0054] The specific installation method and the issues to be paid attention to during installation can be determined according to the model of the ultrasonic level meter 5 selected on site.

[0055] Whether in the flood season or the non-flood season, there will be a certain amount of sewage or sludge in the underground culvert. The long-term or large-scale accumulation of sludge will inevitably lead to dangerous situations, especially for electronic equipment in the underground culvert. In order to timely inspect and maintain the underground culvert structure, an inspection hole 4 is opened on the top of the culvert body 14, and the inspection hole 4 is located downstream of the sewage interception trough 3.

[0056] In daily inspection or maintenance, in order to facilitate the workers to go up and down and take safety issues into consideration, ladders 10 are installed in the culvert 14 under the inspection hole 4 and in the valve well 8.

[0057] Since the electric sewage valve 12 is an electronic device, in order to ensure its normal operation, it must be kept away from liquid as much as possible. Figure 3 As shown, the bottom of the valve well 8 is lower than the bottom of the sewage interception tank 3, and a buttress 15 is provided directly below the electric sewage valve 12.

[0058] It is worth mentioning that the primary sludge trough 1, the secondary sludge trough 2 and the sewage interception trough 3 are all sunken troughs, the bottom of the trough is lower than the bottom plate elevation of the culvert body 14, and the top of the trough is flush with the bottom plate elevation of the culvert body 14. Through this setting, it will not cause water congestion and water blocking to the flow water body of the box culvert, ensuring that the flow capacity of the culvert body is not affected by the sewage interception facilities.

[0059] In order to prevent sludge from entering the sewage pipe network and causing treatment pressure in the sewage treatment plant, a sump 16 is excavated at the bottom of the valve well 8 , and the sump 16 is located directly below the downstream sewage interception pipe 702 .

[0060] Fourth embodiment

[0061] This embodiment provides a method for intercepting sewage using an intelligent automatic sewage interception system for an urban underground culvert, comprising the following steps:

[0062] Step S1, connect the ultrasonic level meter 5, the electric sewage valve 12 and the intelligent light column display 11 to complete the signal debugging;

[0063] Step S2, setting the liquid level point D and the liquid level point H on the intelligent light column display 11, the liquid level point D is higher than the liquid level point H, wherein the point D is the switch start point, and the setting basis is the maximum sewage design liquid level value in the culvert 14 + 0.10m, and the point H is the switch stop point, and the setting basis is the maximum sewage design liquid level value in the culvert 14;

[0064] Step S3, keep the electric sewage valve 12 open, the sewage flows from the culvert 14 through the primary sludge tank 1 and the secondary sludge tank 2 in sequence, and then enters the interception tank 3, and then passes through the upstream interception pipe 701 to the electric sewage valve 12. If it rains or floods, the water level in the culvert 14 continues to rise. When the water level reaches the liquid level point D, the intelligent light column display 11 outputs a valve closing signal to the electric sewage valve 12, and the electric sewage valve 12 is closed to stop intercepting sewage;

[0065] Step S4, if the rainfall decreases or it is not the flood season, the water level in the culvert 14 continues to decrease until it drops to the liquid level point H, and the intelligent light column display 11 outputs a valve opening signal to the electric sewage valve 12, and the electric sewage valve 12 opens to start sewage interception.

[0066] Specifically, the intelligent automatic sewage interception system for the urban underground culvert is provided with a primary sludge tank 1, a secondary sludge tank 2 and a sewage interception tank 3 which are all perpendicular to the water flow direction in sequence from upstream to downstream in the culvert body 14, an ultrasonic level meter 5 facing the sewage interception tank 3 is provided in the culvert body 14, at least one valve well 8 is arranged on the side of the culvert body 14, and a sewage interception pipe 7 connected to the sewage interception tank 3 is laid in the valve well 8, and the sewage interception pipe 7 leads to the sewage pipe network;

[0067] The sewage interception pipe 7 is serially connected with an electric sewage valve 12 located in the valve well 8. The electric sewage valve 12 is electrically connected to an intelligent light column display 11 fixed to the wall of the valve well 8. The intelligent light column display 11 is electrically connected to the ultrasonic liquid level meter 5.

[0068] The sewage interception pipe 7 is composed of two sections of pipes connected through the electric sewage valve 12, namely an upstream sewage interception pipe 701 located upstream of the electric sewage valve 12 and a downstream sewage interception pipe 702 located downstream of the electric sewage valve 12. One end of the upstream sewage interception pipe 701 is connected to the water inlet of the electric sewage valve 12, and the other end penetrates through the wall of the valve well 8 and extends into the culvert wall of the culvert body 14 to be connected with the sewage interception trough 3. One end of the downstream sewage interception pipe 702 is connected to the water outlet of the electric sewage valve 12, and the other end penetrates through the wall of the valve well 8 to lead to the sewage pipe network.

[0069] At least one pipe expansion joint 13 is connected in series between the upstream sewage intercepting pipe 701 and the water inlet of the electric sewage valve 12 .

[0070] A waterproof sleeve 6 is provided between the outer pipe wall of the upstream sewage interception pipe 701 and the culvert wall of the culvert 14, and between the outer pipe wall of the upstream sewage interception pipe 701 and the wall of the valve well 8. A waterproof sleeve 6 is provided between the outer pipe wall of the downstream sewage interception pipe 702 and the wall of the valve well 8.

[0071] A fixing bracket 9 is installed on the culvert wall of the culvert body 14 , and the ultrasonic level meter 5 is fixed to the fixing bracket 9 , and the ultrasonic level meter 5 is close to the culvert top of the culvert body 14 .

[0072] An inspection hole 4 is provided on the top of the culvert body 14 , and the inspection hole 4 is located downstream of the sewage interception trough 3 .

[0073] A ladder 10 is arranged in the concealed culvert 14 below the inspection hole 4 and in the valve well 8 .

[0074] The primary sludge settling tank 1, the secondary sludge settling tank 2 and the sewage interception tank 3 are all sunken tanks, the bottom of the tank is lower than the bottom plate elevation of the culvert 14, and the top of the tank is flush with the bottom plate elevation of the culvert 14; the bottom of the valve well 8 is lower than the bottom of the sewage interception tank 3, and a pier 15 is provided directly below the electric sewage valve 12.

[0075] A sump 16 is excavated at the bottom of the valve well 8 , and the sump 16 is located directly below the downstream sewage interception pipe 702 .

[0076] In summary, the present invention protects an intelligent automatic sewage interception system and method for urban underground culverts, which mainly detects the water level height through an ultrasonic level meter and transmits the water level value to an intelligent light column display, which controls the opening or closing of an electric sewage valve. During the non-flood season, the electric sewage valve remains open, and the sewage in the culvert is intercepted through the sewage interception trough sewage pipe and enters the urban sewage pipe network system to prevent sewage from entering the downstream; during the flood season, the electric sewage valve is closed, sewage interception stops, and rainwater in the culvert enters the downstream river channel, preventing a large amount of combined water from entering the sewage pipe network and avoiding increasing the operating load of the sewage treatment plant. The present invention realizes intelligent automatic sewage interception through the joint action of an ultrasonic level meter, an intelligent light column display, and an electric sewage valve, ensuring that sewage interception is stopped during the flood season and opened during the non-flood season.

[0077] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A method for intercepting sewage using an intelligent automatic sewage interception system in an urban underground culvert, characterized in that: The intelligent automatic sewage interception system for urban underground culverts includes: A primary sludge trough (1), a secondary sludge trough (2) and a sewage interception trough (3) are sequentially arranged in a culvert (14) from upstream to downstream, all of which are perpendicular to the water flow direction; an ultrasonic level meter (5) is arranged in the culvert (14) facing the sewage interception trough (3); at least one valve well (8) is arranged beside the culvert (14); a sewage interception pipe (7) connected to the sewage interception trough (3) is laid in the valve well (8); the sewage interception pipe (7) leads to a sewage pipe network; The sewage interception pipe (7) is serially connected to an electric sewage valve (12) located in the valve well (8); the electric sewage valve (12) is electrically connected to an intelligent light column display (11) fixed to the wall of the valve well (8); and the intelligent light column display (11) is electrically connected to the ultrasonic liquid level meter (5); The sewage interception pipe (7) is composed of two sections of pipes connected through an electric sewage valve (12), namely an upstream sewage interception pipe (701) located upstream of the electric sewage valve (12) and a downstream sewage interception pipe (702) located downstream of the electric sewage valve (12); The method comprises the following steps: Step S1, connecting the ultrasonic level meter (5), the electric sewage valve (12) and the intelligent light column display (11) by signals and completing the debugging; Step S2, setting a liquid level point D and a liquid level point H on the intelligent light column display (11), wherein the liquid level point D is higher than the liquid level point H, wherein point D is a switch start point, and the setting basis is the maximum sewage design liquid level value in the culvert (14) + 0.10m, and point H is a switch stop point, and the setting basis is the maximum sewage design liquid level value in the culvert (14); Step S3, keeping the electric sewage valve (12) open, the sewage flows from the culvert (14) through the primary sludge tank (1) and the secondary sludge tank (2) in sequence, after sludge is deposited, into the sewage interception tank (3), and then passes through the upstream sewage interception pipe (701) to the electric sewage valve (12). If it rains or during the flood season, the water level in the culvert (14) continues to rise. When the water level reaches the liquid level point D, the intelligent light column display (11) outputs a valve closing signal to the electric sewage valve (12), and the electric sewage valve (12) closes, stopping sewage interception; Step S4: If the rainfall decreases or it is not the flood season, the water level in the culvert (14) will continue to decrease until it reaches the liquid level point H. The intelligent light column display (11) will output a valve opening signal to the electric sewage valve (12), and the electric sewage valve (12) will open to start sewage interception.

2. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 1, characterized in that: One end of the upstream sewage interception pipe (701) is connected to the water inlet of the electric sewage valve (12), and the other end passes through the wall of the valve well (8) and extends into the culvert wall of the culvert body (14) to communicate with the sewage interception trough (3); one end of the downstream sewage interception pipe (702) is connected to the water outlet of the electric sewage valve (12), and the other end passes through the wall of the valve well (8) to lead to the sewage pipe network.

3. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 2, characterized in that: At least one pipe expansion joint (13) is connected in series between the upstream sewage interception pipe (701) and the water inlet of the electric sewage valve (12).

4. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 2, characterized in that: A waterproof sleeve (6) sleeved on the pipe wall of the upstream sewage interception pipe (701) is provided between the outer pipe wall of the upstream sewage interception pipe (701) and the culvert wall of the blind culvert (14), and between the outer pipe wall of the upstream sewage interception pipe (701) and the well wall of the valve well (8). A waterproof sleeve (6) sleeved on the pipe wall of the downstream sewage interception pipe (702) is provided between the outer pipe wall of the downstream sewage interception pipe (702) and the well wall of the valve well (8).

5. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 1, characterized in that: A fixing bracket (9) is installed on the culvert wall of the culvert body (14), the ultrasonic liquid level meter (5) is fixed to the fixing bracket (9), and the ultrasonic liquid level meter (5) is close to the culvert top of the culvert body (14).

6. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 1, characterized in that: An inspection hole (4) is provided on the top of the culvert body (14), and the inspection hole (4) is located downstream of the sewage interception trough (3).

7. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 6, characterized in that: A ladder (10) is arranged in the concealed culvert (14) below the inspection hole (4) and in the valve well (8).

8. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 1, characterized in that: The primary sludge settling tank (1), the secondary sludge settling tank (2) and the sewage interception tank (3) are all sunken tanks, the bottom of which is lower than the bottom plate elevation of the culvert (14), and the top of which is flush with the bottom plate elevation of the culvert (14); the bottom of the valve well (8) is lower than the bottom of the sewage interception tank (3), and a buttress (15) is provided directly below the electric sewage valve (12).

9. The method for intercepting sewage using an intelligent automatic sewage interception system for urban underground culverts as claimed in claim 1, characterized in that: A sump (16) is provided at the bottom of the valve well (8), and the sump (16) is located directly below the downstream sewage interception pipe (702).

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