Rain and sewage mixing detection experiment device suitable for drainage pipe network

Abstract

The utility model discloses a rain and sewage mixing detection experiment device applicable to a drainage network. The rain and sewage mixing detection experiment device comprises a first water storage tank, a second water storage tank, a third water storage tank and a drainage network header pipe, the drainage network header pipe is provided with a plurality of inspection wells; a plurality of first water inlet branch pipes corresponding to the inspection wells are formed on the first water inlet pipe; a plurality of second water inlet branch pipes corresponding to the inspection wells are formed on the second water inlet pipe; and a plurality of third water inlet branch pipes corresponding to the inspection wells are formed on the third water inlet pipe. According to the rain and sewage mixing detection experiment device suitable for the drainage network, by simulating different water inlet situations, the change rule of operation of a main pipe of the drainage network is obtained, and the change rule detected and summarized by the experiment device is applied to actual water quality detection and hydraulic condition detection of the main pipe of the drainage network; therefore, whether the mixed connection condition exists in the main pipeline of the drainage network or not can be more accurately judged, and then corresponding measures are taken in time according to the detection result to ensure smooth operation of urban rainwater pipelines and sewage pipelines.

Description

Technical Field

[0001] The utility model relates to an experimental device suitable for detecting rainwater and sewage mixing in a drainage network. Background Art

[0002] Urban rainwater and sewage mixing generally refers to the connection between rainwater and sewage pipes, or the connection between the separate rainwater and sewage pipes and the adjacent combined pipes, resulting in the mixing of rainwater and sewage. The hazards of rainwater and sewage mixing include the following: 1) Sewage is directly discharged into the river through the rainwater pipe, causing the water body to be black and smelly, causing river pollution and affecting the water environment quality; 2) A large amount of rainwater flows into the sewage pipe, causing the sewage pipe network to be overloaded, affecting the transportation capacity of the sewage pipe, causing sewage overflow, road waterlogging, and cellar cover displacement and other safety hazards. Therefore, it is necessary to diagnose and investigate the urban rainwater and sewage mixing. The commonly used investigation techniques are: 1) Determine whether there is a wrong mixing by monitoring the difference in water quality between rainwater and sewage. This can be achieved by collecting samples for chemical analysis and measuring different parameters (such as suspended solids, ammonia nitrogen, total nitrogen, and total phosphorus); 2) Monitor the water level changes and hydraulic conditions of the rainwater and sewage pipes, and observe whether there are abnormal fluctuations during rainfall to determine whether there is a wrong mixing.

[0003] However, the drainage network system is very complex. When judging through water quality testing and hydraulic conditions, it is impossible to know in advance the changing patterns of drainage pipe operation, and thus it is impossible to make accurate judgments based on the changing patterns. Utility Model Content

[0004] The utility model provides a rainwater-sewage mixing detection experimental device suitable for drainage pipe network to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0005] An experimental device suitable for detecting the mixing of rainwater and sewage in a drainage network, comprising: a first water storage tank for storing water, a second water storage tank for storing water, a third water storage tank for storing water and a drainage network main pipe; the drainage network main pipe is provided with a plurality of inspection wells for detecting incoming water in its extension direction; the first water outlet of the first water storage tank is connected to the water inlet end of the drainage network main pipe through a first water inlet pipe; the first water inlet of the first water storage tank is connected to the water outlet end of the drainage network main pipe through a first water outlet pipe; the first water inlet pipe is formed with a plurality of first water inlet branches for correspondingly connecting to corresponding inspection wells; a first valve is provided between each first water inlet branch and its corresponding inspection well; the first water inlet pipe is provided with a first water inlet pump for controlling the overall water inlet flow of the first water inlet pipe; the second water outlet of the second water storage tank is connected to the drainage network main pipe through a second water inlet pipe inlet end; the second water inlet of the second water storage tank is connected to the water outlet end of the drainage network main pipe through the second water outlet pipe; the second water inlet pipe is formed with a plurality of second water inlet branches for correspondingly connecting to the corresponding inspection wells; a second valve is provided between each second water inlet branch and its corresponding inspection well; the second water inlet pipe is provided with a second water inlet pump for controlling the overall water inlet flow of the second water inlet pipe; the third water outlet of the third water storage tank is connected to the water inlet end of the drainage network main pipe through the third water inlet pipe; the third water inlet of the third water storage tank is connected to the water outlet end of the drainage network main pipe through the third water outlet pipe; the third water inlet pipe is formed with a plurality of third water inlet branches for correspondingly connecting to the corresponding inspection wells; a third valve is provided between each third water inlet branch and its corresponding inspection well; the third water inlet pipe is provided with a third water inlet pump for controlling the overall water inlet flow of the third water inlet pipe.

[0006] Furthermore, the first water tank, the second water tank and the third water tank are arranged in parallel at a certain interval.

[0007] Furthermore, the interval distance between the first water tank, the second water tank and the third water tank ranges from 0.5 to 1 m.

[0008] Furthermore, the inspection well is made of plastic.

[0009] Furthermore, electric heating wire heating devices are provided in the first, second and third water storage tanks.

[0010] Furthermore, the number of the first water inlet branch pipe, the second water inlet branch pipe, the third water inlet branch pipe and the inspection well is 4.

[0011] Furthermore, the distance between two adjacent inspection wells ranges from 1 to 1.5 m.

[0012] Furthermore, the four first water inlet branch pipes have the same length and are arranged in parallel with each other; the four second water inlet branch pipes have the same length and are arranged in parallel with each other; and the four third water inlet branch pipes have the same length and are arranged in parallel with each other.

[0013] Furthermore, the first water outlet pipe is provided with a first water outlet pump for controlling the overall water outlet flow of the first water outlet pipe; the second water outlet pipe is provided with a second water outlet pump for controlling the overall water outlet flow of the second water outlet pipe; and the third water outlet pipe is provided with a third water outlet pump for controlling the overall water outlet flow of the third water outlet pipe.

[0014] The benefit of the utility model lies in that the provided experimental device for detecting the mixing of rainwater and sewage in drainage pipe networks simulates different water inlet scenarios to obtain the changing law of operation of the drainage network main pipe. In this way, the changing law summarized by the experimental device is applied to the actual water quality detection and hydraulic condition detection of the drainage network main pipe, so that it can be more accurately determined whether there is a mixed connection in the drainage network main pipe, and then corresponding measures can be taken in time according to the detection results to ensure the smooth operation of urban rainwater pipes and sewage pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of an experimental device for detecting rainwater and sewage mixing in a drainage network applicable to the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the connection between the first water storage tank and the main pipe of the drainage network in the experimental device for detecting rainwater and sewage mixing in the drainage network;

[0018] Figure 3 yes Figure 1 A schematic diagram of the connection between the second water storage tank and the main pipe of the drainage network in the experimental device for detecting rainwater and sewage mixing in the drainage network;

[0019] Figure 4 yes Figure 1 Schematic diagram of the connection between the third water storage tank and the main pipe of the drainage network in the experimental device for detecting rainwater and sewage mixing in the drainage network;

[0020] Figure 5 yes Figure 1 A schematic diagram of an electric heating wire heating device applicable to a drainage network rainwater-sewage mixing detection experimental device being installed in a first water storage tank, a second water storage tank or a third water storage tank;

[0021] An experimental device 10 for detecting rainwater mixing in a drainage network is applicable, comprising a first water storage tank 11, a first water inlet pipe 111, a first water outlet pipe 112, a first water inlet branch pipe 113, a first valve 114, a first water inlet pump 115, a first water outlet pump 116, a second water storage tank 12, a second water inlet pipe 121, a second water outlet pipe 122, a second water inlet branch pipe 123, a second valve 124, a second water inlet pump 125, a second water outlet pump 126, a third water storage tank 13, a third water inlet pipe 131, a third water outlet pipe 132, a third water inlet branch pipe 133, a third valve 134, a third water inlet pump 135, a third water outlet pump 136, a drainage network main pipe 14, a manhole 141, and an electric heating wire heating device 15. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0023] like Figures 1 to 5 As shown, an experimental device 10 for detecting rainwater and sewage mixing in a drainage network applicable to the present application is shown, comprising: a first water tank 11, a second water tank 12, a third water tank 13 and a drainage main pipe. The first water tank 11, the second water tank 12 and the third water tank 13 are all used to store water, and the water bodies stored in the three can be the same or different. The drainage network main pipe 14 is provided with a plurality of inspection wells 141 in its extension direction, through which the water entering the drainage main pipe can be detected, and whether there is mixing inside the drainage network main pipe 14 can be determined by water quality detection, hydraulic detection, etc. Specifically:

[0024] The first water outlet of the first water storage tank 11 is connected to the water inlet end of the drainage network main pipe 14 through the first water inlet pipe 111, and the first water inlet of the first water storage tank 11 is connected to the water outlet end of the drainage network main pipe 14 through the first water outlet pipe 112, so that the water in the first water storage tank 11 can be recycled. The first water inlet pipe 111 is formed with a plurality of first water inlet branches 113, each of which is connected to a corresponding inspection well 141, and a first valve 114 is provided between each first water inlet branch 113 and its corresponding inspection well 141, and the flow rate flowing through the inspection well 141 can be controlled by the first valve 114. The first water inlet pipe 111 is provided with a first water inlet pump 115, and the overall water inlet flow of the first water inlet pipe 111 can be controlled by the first water inlet pump 115.

[0025] The second water outlet of the second water storage tank 12 is connected to the water inlet end of the drainage network main pipe 14 through the second water inlet pipe 121, and the second water inlet of the second water storage tank 12 is connected to the water outlet end of the drainage network main pipe 14 through the second water outlet pipe 122, so that the water in the second water storage tank 12 can be recycled. The second water inlet pipe 121 is formed with a plurality of second water inlet branches 123, each of which is connected to a corresponding inspection well 141, and a second valve 124 is provided between each second water inlet branch 123 and its corresponding inspection well 141, and the flow rate flowing through the inspection well 141 can be controlled by the second valve 124. The second water inlet pipe 121 is provided with a second water inlet pump 125, and the overall water inlet flow rate of the second water inlet pipe 121 can be controlled by the second water inlet pump 125.

[0026] The third water outlet of the third water storage tank 13 is connected to the water inlet of the drainage network main pipe 14 through the third water inlet pipe 131, and the third water inlet of the third water storage tank 13 is connected to the water outlet of the drainage network main pipe 14 through the third water outlet pipe 132, so that the water in the third water storage tank 13 can be recycled. The third water inlet pipe 131 is formed with a plurality of third water inlet branches 133, each of which is connected to a corresponding inspection well 141, and a third valve 134 is provided between each third water inlet branch 133 and its corresponding inspection well 141, and the flow rate flowing through the inspection well 141 can be controlled by the third valve 134. The third water inlet pipe 131 is provided with a third water inlet pump 135, and the overall water inlet flow of the third water inlet pipe 131 can be controlled by the third water inlet pump 135.

[0027] In this solution, electric heating wire heating devices 15 are provided in the first water storage tank 11 , the second water storage tank 12 , and the third water storage tank 13 .

[0028] In the above scheme, the first water tank 11, the second water tank 12 and the third water tank 13 are arranged in parallel at a certain interval, and the interval value between the first water tank 11, the second water tank 12 and the third water tank 13 is in the range of 0.5 to 1 m. In this way, during the experiment, the flow distance of the water body is increased, which improves the authenticity of the simulation scene.

[0029] As a specific implementation, the inspection well 141 is made of plastic. That is to say, the inspection well 141 is a plastic finished inspection well 141 commonly used in the actual drainage network main pipe 14, so that the detection environment is the same as the actual application, improving the authenticity of the experimental device detection.

[0030] As a specific implementation method, the number of the first water inlet branch pipe 113, the second water inlet branch pipe 123, the third water inlet branch pipe 133 and the inspection well 141 are all 4, and the following are made: the lengths of the 4 first water inlet branch pipes 113 are the same and they are arranged in parallel with each other; the lengths of the 4 second water inlet branch pipes 123 are the same and they are arranged in parallel with each other; the lengths of the 4 third water inlet branch pipes 133 are the same and they are arranged in parallel with each other; and the distance value between two adjacent inspection wells 141 ranges from 1 to 1.5 m. In this way, in a limited experimental site, the factor of the unified flow path is realized, and the influence of the factor on the detection result is controlled.

[0031] As a specific implementation, the first water outlet pipe 112 is provided with a first water outlet pump 116 for controlling the overall water outlet flow of the first water outlet pipe 112, the second water outlet pipe 122 is provided with a second water outlet pump 126 for controlling the overall water outlet flow of the second water outlet pipe 122, and the third water outlet pipe 132 is provided with a third water outlet pump 136 for controlling the overall water outlet flow of the third water outlet pipe 132. In this way, by controlling the flow of the first water outlet pump 116, the second water outlet pump 126 or the third water outlet pump 136, it is also possible to simulate the changes in parameters such as water quality and hydraulics of each inspection well 141 of the overall drainage network main pipe 14 when local flow blockage occurs.

[0032] The specific operation of the above-mentioned drainage network rainwater and sewage mixing detection experimental device 10 is as follows:

[0033] Simulation condition 1: Simulate different hydraulic operation conditions. The specific operation steps are as follows:

[0034] First, water is added to the first water storage tank 11, and the first water inlet pump 115 is turned on. The parameters of the first water inlet pump 115, such as flow rate and lift, are adjusted to control the flow rate and flow velocity in the drainage network main pipe 14, so as to achieve the purpose of simulating operation of different hydraulic conditions.

[0035] Simulation condition 2: Under the simulation of different water sources, the water quality parameter indicators in the drainage network main pipe 14 are tested and compared. The specific steps are as follows:

[0036] Step 1: Add sewage to the first water storage tank 11, start the first water inlet pump 115, design the flow rate to be 100L / s, design the circulation mode to start, detect the relevant water quality parameters in the sewage, such as conductivity, turbidity, COD, ammonia nitrogen and other water quality parameters, and record the water quality parameter data in detail.

[0037] Step 2: Add sewage to the first water tank 11, add rainwater to the second water tank 12, add groundwater to the third water tank 13, and start the first water inlet pump 115, the second water inlet pump 125, and the third water inlet pump 135 respectively. The design flow rate of the first water inlet pump 115 is designed to be 100L / s, the design flow rate of the second water inlet pump 125 is designed to be 10L / s, and the design flow rate of the third water inlet pump 135 is designed to be 5L / s. Under the above-mentioned design flow conditions, record water quality parameter data, such as conductivity, turbidity, COD, ammonia nitrogen, etc. Finally, compare and analyze the data of step 1 and step 2 to obtain relevant rules.

[0038] Simulation condition 3: Simulate the water quality change conditions at different positions on the drainage network main pipe 14 when external water enters from different positions. The specific steps are as follows:

[0039] Step 1: Add sewage to the first water storage tank 11, and start the first water inlet pump 115 with a designed flow rate of 100 L / s.

[0040] Add rainwater to the second water storage tank 12, start the second water inlet pump 125, and adjust the first valve 114 on the first water inlet branch pipes 113 arranged in sequence, so that the water outlet flow rates of the first water inlet branch pipes 113 arranged in sequence are 9L / s, 6L / s, 3L / s, and 1L / s respectively, and then detect the water quality parameters at the inspection wells 141 corresponding to each first water inlet branch pipe 113, including conductivity, turbidity, COD, and ammonia nitrogen, for comparison.

[0041] Simulation condition 4: Simulate the water temperature variation at different positions on the drainage network main pipe 14 under different water temperatures.

[0042] Add sewage to the first water storage tank 11, turn on the electric heating wire heating device 15, and set several temperature groups, such as 10°C, 15°C, 20°C, and 25°C. Under these four temperature groups, turn on the first water inlet pump 115 to start the circulation work, and then detect the temperature change pattern at the position of each inspection well 141 when it is in different temperature groups.

[0043] To sum up, the drainage network rainwater and sewage mixing detection experimental device 10 simulates different water inlet scenarios to obtain the changing law of the operation of the drainage network main pipe 14. In this way, the changing law summarized by the experimental device is applied to the actual water quality detection and hydraulic condition detection of the drainage network main pipe 14, so that it can be more accurately determined whether there is a mixed connection in the drainage network main pipe 14, and then corresponding measures can be taken in time according to the test results to ensure the smooth operation of urban rainwater pipes and sewage pipes.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. An experimental device for detecting rainwater and sewage mixing in a drainage network, characterized in that: include: a first water storage tank for storing water, a second water storage tank for storing water, a third water storage tank for storing water, and a drainage network main; The main pipe of the drainage network is provided with a plurality of inspection wells for testing incoming water in its extension direction; The first water outlet of the first water storage tank is connected to the water inlet end of the drainage network main pipe through a first water inlet pipe; The first water inlet of the first water storage tank is connected to the water outlet end of the drainage network main pipe through a first water outlet pipe; The first water inlet pipe is formed with a plurality of first water inlet branches for correspondingly connecting to the corresponding inspection wells; A first valve is provided between each of the first water inlet branch pipes and the corresponding inspection well; The first water inlet pipe is provided with a first water inlet pump for controlling the overall water inlet flow rate of the first water inlet pipe; The second water outlet of the second water storage tank is connected to the water inlet end of the drainage network main pipe through a second water inlet pipe; The second water inlet of the second water storage tank is connected to the water outlet end of the drainage network main pipe through a second water outlet pipe; The second water inlet pipe is formed with a plurality of second water inlet branches for correspondingly connecting to the corresponding inspection wells; A second valve is provided between each of the second water inlet branch pipes and the corresponding inspection well; The second water inlet pipe is provided with a second water inlet pump for controlling the overall water inlet flow rate of the second water inlet pipe; The third water outlet of the third water storage tank is connected to the water inlet end of the drainage network main pipe through a third water inlet pipe; The third water inlet of the third water storage tank is connected to the water outlet end of the drainage network main pipe through the third water outlet pipe; The third water inlet pipe is formed with a plurality of third water inlet branches for correspondingly connecting to the corresponding inspection wells; A third valve is provided between each of the third water inlet branch pipes and the corresponding inspection well; The third water inlet pipe is provided with a third water inlet pump for controlling the overall water inlet flow rate of the third water inlet pipe.

2. The applicable drainage network rainwater and sewage mixing detection experimental device according to claim 1 is characterized in that: The first water storage tank, the second water storage tank and the third water storage tank are arranged in parallel at a certain interval.

3. The applicable drainage network rainwater and sewage mixing detection experimental device according to claim 2 is characterized in that: The interval distance between the first water tank, the second water tank and the third water tank is in the range of 0.5 to 1 m.

4. The experimental device for detecting rainwater-sewage mixing in drainage pipe networks according to claim 1 is characterized in that: The inspection well is made of plastic.

5. The experimental device for detecting rainwater-sewage mixing in drainage pipe networks according to claim 1 is characterized in that: The first, second and third water storage tanks are all provided with electric heating wire heating devices.

6. The experimental device for detecting rainwater and sewage mixing in drainage pipe networks according to claim 1 is characterized in that: The number of the first water inlet branch pipe, the second water inlet branch pipe, the third water inlet branch pipe and the inspection well is 4.

7. The experimental device for detecting rainwater-sewage mixing in drainage pipe networks according to claim 6 is characterized in that: The distance between two adjacent inspection wells ranges from 1 to 1.5 m.

8. The experimental device for detecting rainwater and sewage mixing in drainage pipe networks according to claim 6 is characterized in that: The four first water inlet branches have the same length and are arranged parallel to each other; The four second water inlet branches have the same length and are arranged parallel to each other; The four third water inlet branch pipes have the same length and are arranged parallel to each other.

9. The experimental device for detecting rainwater and sewage mixing in drainage pipe networks according to claim 1 is characterized in that: The first water outlet pipe is provided with a first water outlet pump for controlling the overall water outlet flow of the first water outlet pipe; the second water outlet pipe is provided with a second water outlet pump for controlling the overall water outlet flow of the second water outlet pipe; the third water outlet pipe is provided with a third water outlet pump for controlling the overall water outlet flow of the third water outlet pipe.

Images