阅读说明：本技术 市政排水管道泄漏监测系统 (Municipal drainage pipeline leakage monitoring system ) 是由 韩少鹏 于 2018-09-09 设计创作，主要内容包括：一种市政排水管道泄漏监测系统,包括：第一排水井,其与排水管道相连通；第二排水井,其与第一排水井以及排水管道相连通；第一流量传感器,位于第一排水井与排水管道的接口与第二排水井与排水管道的接口之间；第二流量传感器,位于第二排水井的排水通道之后；通过第二流量传感器检测排水管道的流量,将其测量值传送到中央控制系统；中央控制系统根据第二流量传感器的测量值,确定市政排水管道是否存在泄漏或者堵塞。通过本发明的监测系统,能够减少各种排水管道问题出现,保证排水管道系统正常工作。(A municipal drainage pipeline leak monitoring system comprising: the first drainage well is communicated with the drainage pipeline; the second drainage well is communicated with the first drainage well and the drainage pipeline; the first flow sensor is positioned between the interface of the first drainage well and the drainage pipeline and the interface of the second drainage well and the drainage pipeline; a second flow sensor located after the drainage channel of the second drainage well; detecting the flow of the drainage pipeline through a second flow sensor, and transmitting the measured value to the central control system; the central control system determines whether the municipal drainage pipeline has leakage or blockage according to the measurement value of the second flow sensor. The monitoring system can reduce the occurrence of various drainage pipeline problems and ensure the normal work of the drainage pipeline system.)

1. A municipal drainage pipeline leak monitoring system comprising: the first drainage well is communicated with the drainage pipeline and outputs the rainfall through the drainage pipeline; the second drainage well is communicated with the first drainage well and the drainage pipeline through the first valve and the second valve respectively; the water level sensor is arranged in the second drainage well and used for monitoring the water level of the second drainage well; the local controller is used for closing the second valve in a non-monitoring state and closing the first valve when the water level of the second drainage well reaches a threshold value; the first flow sensor is arranged in the drainage pipeline and is positioned between a joint of the first drainage well and the drainage pipeline and a joint of the second drainage well and the drainage pipeline; the second flow sensor is arranged in the drainage pipeline and behind the drainage channel of the second drainage well; the local controller triggers a monitoring state to open the second valve when the detection value of the first flow sensor is zero and the water level of the second drainage well reaches a threshold value; detecting the flow of the drainage pipeline through a second flow sensor, and transmitting the measured value to the central control system; the central control system also comprises a storage module and a time integral calculation module, and when the central control system is in a monitoring state, the storage module records the flow value of the second flow sensor from the beginning of water drainage of the second drainage well to the end of water drainage; when the stable measurement value of the second flow sensor is higher than the flow threshold value, judging that the municipal drainage pipeline is normal; when the water volume is lower than the flow threshold, calculating the total water discharge amount S1 through a time integral calculation module after the water discharge of the second drainage well is finished, and calculating v = S1/S2 through the total water discharge amount S1, wherein S2 is the water volume when the water level of the second drainage well is at the threshold; when v is smaller than the ratio threshold, judging that the drainage pipeline leaks; and when the v is larger than the ratio threshold value, judging that the drainage pipeline has no leakage but is blocked.

2. The municipal drainage pipeline monitoring system of claim 1, wherein: the time integral calculation module calculates the total amount of drained water S1 by the following method: s1=, where Ti is a single calculation cycle, may be, for example, 2S, Qb is the flow at the start of the Ti cycle, and Qe is the flow at the end of the Ti cycle.

Technical Field

The invention relates to a system for checking and determining leakage of a pipeline system, in particular to a municipal drainage pipeline leakage monitoring system.

Background

Recently, with the development of science and technology and the progress of cities, social public facilities are improved to a great extent, and urban drainage pipeline systems are more and more concerned by people. In urban construction, a drainage pipeline system is a key link for maintaining normal use of municipal engineering and is an important component of infrastructure of urban construction. Municipal construction must continuously perfect urban water supply and drainage pipelines to enable urban water supply and drainage systems to play fundamental roles, thereby promoting the development of urban construction in China.

The drainage pipeline system is an urban 'drainage system', is responsible for the functions of collecting, conveying and treating rainwater, domestic sewage, industrial wastewater and precipitation, is a major project in urbanization construction, and is an important component of the construction of a 'sponge city'. The underground drainage pipeline is usually subjected to structural damage such as pipeline joint dislocation and disjointing, pipe body crack, damage, water seepage of a well body of an inspection well and the like due to various reasons such as material quality, construction quality, corrosion, improper foundation treatment, traffic dynamic load, foundation settlement and the like, and is easy to cause sewage seepage in an area with a low underground water level and cause underground water to seep from an unclosed position of the pipeline in an area with a high underground water level. Infiltration may cause backfill material around the pipe to enter the drain along with the gaps, and a large flush of backfill soil may cause pipe blockage.

Because underground drainage pipe belongs to secret hidden engineering, its defect is difficult to often by the operation personnel discovery, simultaneously, if can not in time control, will appear cavitys around the pipeline when the seepage is serious, in case there is structural damage such as crack or pipeline bearing capacity not enough in the pipeline and will take place phenomenons such as collapse to lead to producing the loss or can take place the incident. Therefore, in order to ensure the quality of the drainage pipeline, various detection technologies need to be comprehensively applied, the detection of the drainage pipeline is enhanced, the problems of various drainage pipelines are reduced, and the normal work of a drainage pipeline system is ensured.

Disclosure of Invention

The invention provides a municipal drainage pipeline leakage monitoring system which can solve the problems in the prior art.

As one aspect of the invention, a municipal drainage pipeline leakage monitoring system is provided, comprising: the first drainage well is communicated with the drainage pipeline and outputs the rainfall through the drainage pipeline; the second drainage well is communicated with the first drainage well and the drainage pipeline through the first valve and the second valve respectively; the water level sensor is arranged in the second drainage well and used for monitoring the water level of the second drainage well; the local controller is used for closing the second valve in a non-monitoring state and closing the first valve when the water level of the second drainage well reaches a threshold value; the first flow sensor is arranged in the drainage pipeline and is positioned between a joint of the first drainage well and the drainage pipeline and a joint of the second drainage well and the drainage pipeline; the second flow sensor is arranged in the drainage pipeline and behind the drainage channel of the second drainage well; the local controller triggers a monitoring state to open the second valve when the detection value of the first flow sensor is zero and the water level of the second drainage well reaches a threshold value; detecting the flow of the drainage pipeline through a second flow sensor, and transmitting the measured value to the central control system; and the central control system determines whether the municipal drainage pipeline has leakage or not according to the measured value of the second flow sensor.

Further, when the measured value of the second flow sensor is stable, and the measured value of the second flow sensor is smaller than the flow threshold value, the central control system judges that the drainage pipeline has leakage.

Further, the central control system also comprises a storage module and a time integral calculation module, and when the central control system is in a monitoring state, the storage module records the flow value of the second flow sensor in the time period from the beginning of water drainage to the end of water drainage of the second drainage well; when the stable measurement value of the second flow sensor is higher than the flow threshold value, judging that the municipal drainage pipeline is normal; when the water volume is lower than the flow threshold, calculating the total water discharge amount S1 through a time integral calculation module after the water discharge of the second drainage well is finished, and calculating v = S1/S2 through the total water discharge amount S1, wherein S2 is the water volume when the water level of the second drainage well is at the threshold; when v is smaller than the ratio threshold, judging that the drainage pipeline leaks; and when the v is larger than the ratio threshold value, judging that the drainage pipeline has no leakage but is blocked.

Further, the ratio threshold value is 80-90%.

Further, the time integral calculation module calculates the total amount of drained water S1 by: s1=, where Ti is a single calculation cycle, may be, for example, 2S, Qb is the flow at the start of the Ti cycle, and Qe is the flow at the end of the Ti cycle.

Further, the flow threshold is determined according to the flow of the water discharged by the sealed water discharge pipeline corresponding to the second water discharge well threshold water level during initial installation.

Furthermore, a monitoring channel of a drainage pipeline is formed between the drainage channel of the second drainage well and the second flow sensor.

Drawings

FIG. 1 is a schematic structural diagram of a municipal drainage pipeline leakage monitoring system according to an embodiment of the invention.

Detailed Description

In order to more clearly illustrate the technical solutions of the present invention, the present invention will be briefly described below by using embodiments, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other technical solutions can be obtained according to the embodiments without inventive labor, and also fall within the disclosure of the present invention.

The municipal drainage pipeline leakage monitoring system provided by the embodiment of the invention is used for monitoring leakage and blockage of municipal drainage pipelines, and comprises a first drainage well, a second drainage well, a first valve, a second valve, a local controller, a first flow sensor, a second flow sensor and a central control system (not shown), and is shown in figure 1.

The first drainage well and the drainage pipeline are used for receiving rainwater during rainfall and outputting the rainwater to a sewage treatment plant or a river channel through the drainage pipeline. The second drainage well does not directly receive rainfall, is connected with the first drainage well through the first valve and is connected with the drainage pipeline through the second valve. A water level sensor is arranged in the second drainage well and can monitor the water level of the second drainage well. The local controller can control the switches of the first valve and the second valve according to the detection result of the water level sensor, when the local controller is in a non-monitoring state, the second valve is closed by the local controller, the second drainage well receives rainwater of the first drainage well when rainfall water, the first valve is closed when the water level of the second drainage well reaches a threshold value, and the second drainage well does not receive rainwater any more.

The first flow sensor is arranged in the drainage pipeline and is positioned between a joint of the first drainage well and the drainage pipeline and a joint of the second drainage well and the drainage pipeline; and the second flow sensor is arranged in the drainage pipeline and behind the drainage channel of the second drainage well. And a monitoring channel of a drainage pipeline is formed between the interface of the second drainage well and the drainage pipeline and the second flow sensor. The first flow sensor and the second flow sensor are volume flow sensors, and detection values of the volume flow sensors can be transmitted to the central control system through a wireless network.

The first flow sensor can detect the drainage flow of the drainage pipeline during rainfall; after the rainfall is finished, the detection value of the first flow sensor gradually decreases to zero. At the moment, the local controller triggers a monitoring state according to the water level of the second drainage well, when the detection value of the first flow sensor is zero and the water level of the second drainage well reaches a threshold value, the monitoring state is triggered, the second valve is opened, accumulated water in the second drainage well is output through the drainage pipeline, the flow of the drainage pipeline is detected through the second flow sensor, and the measured value of the flow is transmitted to the central control system; and when the measured value of the second flow sensor is stable, the central control system judges that the drainage pipeline has leakage and judges that the drainage pipeline has leakage when the measured value of the second flow sensor is lower than the flow threshold value. The flow threshold may be determined based on the flow rate of the sealed drain pipe corresponding to the second drain well threshold level drain at initial installation.

Through the embodiment of the invention, the leakage monitoring of the drainage pipeline can be realized, and the normal work of a drainage pipeline system is ensured. However, the above-described embodiment cannot determine whether the flow rate reduction is caused by clogging or leakage because clogging may occur due to the influence of garbage, sand, or the like in the drain line and the flow rate reduction may also occur when the clogging occurs.

As a further improvement, in a preferred embodiment of the present invention, the central control system further includes a storage module and a time integral calculation module, and when the central control system is in the monitoring state, the storage module records a flow value of the second flow sensor from the beginning of the drainage of the second drainage well to the end of the drainage; when the stable measurement value of the second flow sensor is higher than the flow threshold value, judging that the municipal drainage pipeline is normal; when the flow rate is lower than the flow rate threshold value, calculating the total water discharge amount S1 and S1 =bya time integral calculation module after the water discharge of the second water discharge well is finished, wherein Ti is a single calculation period and can be, for example, 2S, Qb is the flow rate at the starting moment of the Ti period, and Qe is the flow rate at the last moment of the Ti period; calculating v = S1/S2 by total water drainage S1, wherein S2 is the water containing volume at the second water drainage well water level threshold; when v is smaller than the ratio threshold, judging that the drainage pipeline leaks; and when the v is larger than the ratio threshold value, judging that the drainage pipeline has no leakage but is blocked. The ratio threshold may be set to 80-90%, for example, may be set to 90%.

The invention has been described herein with reference to specific exemplary embodiments thereof. It will be apparent to those skilled in the art that appropriate substitutions or modifications may be made without departing from the scope of the invention. The exemplary embodiments are merely illustrative, and not restrictive of the scope of the invention, which is defined by the appended claims. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.