A detection device and method for a siphonic drainage pipe network

Abstract

A kind of mouth of a river backfill drainage pipe network detection device and detection method, detection device includes elbow and shaft;The end of elbow is provided with plugging pipe, the other end is provided with connecting pipe, the shaft is installed on connecting pipe.Detection method includes the following steps: S0: determine suspected well;S1: assemble detection device;S2: detection device is put into water, after plugging pipe is aimed at the mouth of a river, it is inserted and plugged, so that detection device and the pipeline in suspected well form a communicating vessel structure;S3: water is taken from the field surface water body using water taking tool, after adding isotope tracer, mixed water body is poured into detection device from the top of shaft, so that mixed water body enters suspected well;S4: water quality sampling is carried out in suspected well and is detected, when the tracer put in is detected in water sample, then it can be judged that the inspection well is one of the paths of the mouth of a river as surface water invasion;S5: repeat steps S2 to step S4 to detect the water quality of multiple suspected wells.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewer network detection, in particular to a sewer network detection device and method for sewer mouth backflow. BACKGROUND

[0002] The clean water body of a river or a city lake is transported into a municipal sewer network through an underwater sewage outlet and then into a municipal sewage treatment plant. Reducing the pollutant concentration of the water entering the sewage treatment plant is one of the main problems faced by the field of municipal sewage treatment. Due to the long construction period of the municipal sewer network, data is lost, construction quality is uneven, rainwater and sewage pipes are damaged, and there are misconnections, etc. Therefore, the identification of the path through which surface water invades into the sewage collection system through the sewer mouth backflow and the judgment of the backflow level have always been difficult for the quality improvement and efficiency enhancement of the urban sewage system.

[0003] The detection methods used in the prior art have problems such as low field operation efficiency (such as CCTV detection), water quality detection index defects (such as chlorophyll a), and survey results being greatly affected by water level. SUMMARY

[0004] The main purpose of the present application is to provide a sewer network detection device and method for sewer mouth backflow, which aims to solve the above technical problems.

[0005] To achieve the above purpose, on the one hand, the present application provides a sewer network detection device for sewer mouth backflow, which comprises a right-angle elbow and a shaft; a plugging pipe is arranged at one end of the right-angle elbow, and a connecting pipe is arranged at the other end; and the shaft is installed on the connecting pipe.

[0006] Preferably, the plugging pipe is a conical pipe structure, and the large end of the plugging pipe is threadedly connected to the right-angle elbow and sealed by a sealing ring.

[0007] Preferably, the connecting pipe is a conical pipe structure, the large end of the connecting pipe is threadedly connected to the right-angle elbow and sealed by a sealing ring, and the shaft is threadedly connected to the small end of the connecting pipe.

[0008] Preferably, the shaft is made of transparent material and has a scale marked thereon.

[0009] Preferably, the shaft is composed of multiple cylinder bodies which are threadedly connected to each other.

[0010] Preferably, the plugging pipe is made of hard plastic.

[0011] Preferably, the right-angle elbow and the connecting pipe are made of stainless steel.

[0012] On the other hand, the present application also provides a sewer network detection method for sewer mouth backflow, which uses the above-mentioned sewer network detection device for sewer mouth backflow and comprises the following steps:

[0013] S0: According to the position of the outlet, the municipal drainage pipe network direction, mark the inspection well point of the suspected reverse flow path in the onshore inspection well, and mark it as a suspected well;

[0014] S1: Assemble the right-angle elbow, well shaft, plugging pipe and connecting pipe to obtain a detection device;

[0015] S2: Put the detection device into water, insert and plug the plugging pipe after aligning the outlet, so that the detection device and the pipeline in the suspected well form a communicating vessel structure;

[0016] S3: Use a water taking tool to take water from the field surface water body, add an isotopic tracer to form a mixed water body, and pour the mixed water body into the detection device from the top of the well shaft, so that the mixed water body enters the suspected well;

[0017] S4: Take water quality samples in the suspected well and detect, when the tracer put in is detected in the water sample, it can be determined that the inspection well is one of the paths of the outlet as surface water intrusion;

[0018] S5: Repeat steps S2 to S4 to detect the water quality of multiple suspected wells until the complete surface water intrusion path is identified.

[0019] Preferably, in the step S1, according to the relative height of the outlet from the ground, the number of required well shafts is estimated, so that in step S2, the top end of the well shaft is above the ground.

[0020] Preferably, in the step S4, the amount of water poured into the detection device is controlled, and the liquid level height in the well shaft is observed, when the water depth in the well shaft does not rise or fall with the amount of added water, the scale on the outer surface of the well shaft is read, and the relative height ΔZ of the liquid surface in the well shaft from the ground is calculated, then the surface water intrusion critical water level is H = h1 + ΔZ; wherein h1 is the actual value of the ground elevation.

[0021] Due to the adoption of the above technical scheme, the present application has the following advantages:

[0022] (1) By using the detection device provided by the present application, when detecting, only the plugging pipe of the detection device is aligned with the outlet and inserted for plugging, so that the detection device and the pipeline in the suspected well form a communicating vessel structure, and then the mixed water body with the isotopic tracer is poured into the detection device. By taking water quality samples in the suspected well and detecting, when the tracer put in is detected in the water sample, it can be determined that the inspection well is one of the paths of the outlet as surface water intrusion. The detection device has simple structure and is easy to use, which is beneficial to improve the detection efficiency.

[0023] (2) The application provides a kind of detection device and detection method of drainage pipe network of inverted flow of outlet, realize the accurate discrimination of the invasion path of surface water through inverted flow of outlet, environmental adaptability is high, operability is strong, overcome the problems of many limiting factors, environmental pollution risk, water operation danger in prior art.

[0024] (3) The detection device and detection method of drainage pipe network of inverted flow of outlet provided by the application can identify the critical water level of the outlet as a surface water invasion channel. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the structures shown in the drawings.

[0026] Figure 1 The detection device provided by the application is shown in the perspective view.

[0027] Figure 2 The front view of the detection device provided by the application.

[0028] Reference signs: 1, elbow; 2, shaft; 3, plugging pipe; 4, connecting pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0031] In combination with Figure 1 , Figure 2 As shown in the drawings, in one aspect, the embodiment provides a detection device for drainage pipe network of inverted flow of outlet, which comprises an elbow 1 and a shaft 2. A plugging pipe 3 is arranged at one end of the elbow 1, and a connecting pipe 4 is arranged at the other end. The shaft 2 is installed on the connecting pipe 4.

[0032] In combination withFigure 1 As shown, the plugging pipe 3 is a tapered pipe structure, and the large end of the plugging pipe 3 is threadedly connected with the elbow 1 and sealed by a sealing ring. The small end of the plugging pipe 3 is an insertion end for being inserted into the outlet of the suspected well. The small end of the plugging pipe 3 satisfies the insertion plugging requirement of the common drain pipe diameter in engineering practice and can be prefabricated according to the practical needs. The large end of the plugging pipe 3 is an interface end, and the outer surface of the interface end is provided with external threads for threadedly connecting with the internal threads of the elbow 1.

[0033] In combination with the above Figure 1 As shown, the connecting pipe 4 is a tapered pipe structure, and the large end of the connecting pipe 4 is provided with external threads for threadedly connecting with the internal threads of the elbow 1 and sealed by a sealing ring. The small end of the connecting pipe 4 is threadedly connected with the wellbore 2.

[0034] In this embodiment, the wellbore 2 is made of acrylic or other materials with high transparency, and a scale is provided on the wellbore 2 to facilitate observation of the height of the liquid level inside the wellbore 2.

[0035] In this embodiment, the wellbore 2 is composed of multiple sections of cylinder bodies that are threadedly connected with each other. Each section of cylinder body has a height of 0.5 m and a diameter of 0.1 m. The structure of the wellbore 2 composed of multiple sections of cylinder bodies can be assembled to meet the height requirement according to the relative height of the outlet from the ground surface.

[0036] The plugging pipe 3 is made of hard plastic, which can avoid rigid collision with the pipeline at the outlet when the plugging pipe is inserted into the outlet, thereby effectively protecting the pipeline at the outlet.

[0037] In this embodiment, the elbow 1 and the connecting pipe 4 are made of stainless steel, which can avoid rusting and prolong the service life of the detection device.

[0038] On the other hand, the present embodiment also proposes a method for detecting a drainage pipe network with outlet backflow, which uses the above-mentioned detection device for drainage pipe network with outlet backflow and includes the following steps:

[0039] S0: Mark the suspected backflow path inspection well point in the inspection well on the shore according to the outlet position and the municipal drainage pipe network direction, and mark it as a suspected well;

[0040] S1: Assemble the elbow 1, the wellbore 2, the plugging pipe 3, and the connecting pipe 4 to obtain the detection device;

[0041] S2: Place the detection device in water, insert and plug the plugging pipe 3 against the outlet to form a communicating vessel structure between the detection device and the pipeline in the suspected well;

[0042] S3: using water taking tool to take water from the field surface water body, adding isotope tracer to form mixed water body, pouring the mixed water body from the top of the wellbore 2 into the detection device, so that the mixed water body enters the suspected well;

[0043] S4: water quality sampling and detection are performed in the suspected well, and when the tracer put into the water sample is detected, it is determined that the inspection well is one of the paths of the drain as the surface water intrusion;

[0044] S5: repeating steps S2 to S4 to detect the water quality of multiple suspected wells until the complete surface water intrusion path is identified.

[0045] In the step S1, according to the relative height of the drain from the ground, the number of required wellbore 2 is estimated, so that in step S2, the top of the wellbore 2 is above the ground.

[0046] In the step S4, the amount of water poured into the detection device is controlled, and the liquid level in the wellbore 2 is observed, the rise and fall of the water body in the wellbore 2 is observed, if the water depth in the wellbore decreases, continue to add water; when the water depth in the wellbore 2 does not rise or fall with the amount of water added, read the scale on the outer surface of the wellbore 2, calculate the relative height ΔZ of the liquid surface in the wellbore 2 from the ground, then the critical water level of surface water intrusion is H = h1 + ΔZ; wherein h1 is the actual value of the ground elevation. Therefore, the determination of the critical water level of surface water intrusion can be realized.

[0047] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A method for detecting backflow in drainage pipe networks at outlets, characterized in that, A backflow drainage network detection device is adopted, which includes a right-angle elbow (1) and a well (2); a sealing pipe (3) is provided at one end of the right-angle elbow (1), and a connecting pipe (4) is provided at the other end, and the well (2) is installed on the connecting pipe (4); The detection method includes the following steps: S0: Based on the location of the outlet and the direction of the municipal drainage network, mark the locations of the inspection wells on the shore that are suspected of backflow paths, and record them as suspected wells; S1: Assemble the right-angle elbow (1), well shaft (2), sealing pipe (3), and connecting pipe (4) to obtain the detection device; S2: Place the detection device in the water, align the sealing pipe (3) with the outlet and insert it to seal it, so that the detection device and the pipe in the suspected well form a communicating vessel structure; S3: Use a water sampling tool to take water from the surface water body on site, add isotope tracer to form a mixed water body, pour it from the top of the well (2) into the detection device, so that the mixed water body enters the suspected well; S4: Water samples are taken and tested in the suspected well. If the tracer is detected in the water sample, it can be determined that the inspection well is one of the pathways for surface water intrusion. S5: Repeat steps S2 to S4 to test the water quality of multiple suspected wells until the complete surface water intrusion path is identified; In step S3, the amount of water poured into the detection device is controlled, and the liquid level in the well (2) is observed. When the water depth in the well (2) does not rise or fall with the amount of water added, the scale on the outer surface of the well (2) is read, and the relative height of the liquid level in the well (2) from the ground surface is calculated. Z, then the critical water level for surface water intrusion is H = h1 + Z; where h1 is the actual value of the ground surface elevation.

2. The method for detecting backflow in drainage pipe networks as described in claim 1, characterized in that: The sealing tube (3) has a tapered tube structure. The large end of the sealing tube (3) is connected to the right-angle elbow (1) by a thread and sealed by a sealing ring.

3. The method for detecting backflow in drainage pipe networks as described in claim 1, characterized in that: The connecting pipe (4) has a tapered pipe structure. The large end of the connecting pipe (4) is connected to the right-angle elbow (1) by a thread and sealed by a sealing ring. The well shaft (2) is connected to the small end of the connecting pipe (4) by a thread.

4. The method for detecting backflow drainage pipe network at outlets as described in claim 1, characterized in that: The well casing (2) is made of transparent material and has a scale on it.

5. The method for detecting backflow in drainage pipe networks as described in claim 1, characterized in that: The well shaft (2) is composed of multiple sections of cylinder spliced ​​together, and adjacent cylinders are connected by threads.

6. The method for detecting backflow in drainage pipe networks as described in claim 1, characterized in that: The sealing tube (3) is made of hard plastic.

7. The method for detecting backflow drainage pipe network at outlets as described in claim 1, characterized in that: The right-angle elbow (1) and the connecting pipe (4) are made of stainless steel.

8. The method for detecting backflow drainage pipe network at outlets as described in claim 1, characterized in that: In step S1, the number of sections of the wellbore (2) required is estimated based on the relative height of the outlet from the ground surface, so that in step S2, the top of the wellbore (2) is higher than the ground surface.

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