Underground pipeline leakage pollution monitoring system

Abstract

The utility model relates to an underground pipeline leakage pollution monitoring system which comprises a sealing pipe sleeve, a circulating pipeline, a one-way valve, a circulating pump and a monitoring unit. The sealing pipe sleeve fixedly sleeves a potential leakage point of the underground pipeline, and forms a sealing interlayer with the underground pipeline; circulating liquid circulates in the circulating pipeline, and the circulating pipeline comprises an upper circulating pipe, a return pipe, a lower circulating pipe and an output pipe which are sequentially and circularly connected; the lower circulating pipe is buried underground, and the sealing interlayer is communicated with the lower circulating pipe through a one-way valve; the upper circulating pipe is arranged on the ground, and a circulating pump and a monitoring unit are arranged on the upper circulating pipe. When leakage occurs, leakage liquid enters the sealing interlayer, enters the circulating pipeline through the one-way valve and is conveyed to the ground, so that the underground leakage liquid can be brought to the ground to be detected, the monitoring unit can be deployed on the ground, a stable monitoring environment can be provided for the monitoring unit, and the service life and the maintenance period can be prolonged; the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline monitoring technical field, concretely relates to an underground pipeline leakage pollution monitoring system. BACKGROUND

[0002] With the rapid development of petroleum chemical industry, municipal water supply and drainage and other liquid delivery industry, a large number of underground pipelines are laid in cities and industrial areas. Because of the complex underground environment, once the pipeline leaks, it is often difficult to be found in time, and the leaked oil or chemical substances can also cause serious pollution to the soil and groundwater. Therefore, effective leakage monitoring and early warning of underground pipelines have become an important research direction to protect public safety and ecological environment.

[0003] The current common technical idea is to directly bury various sensors at the key positions of underground pipelines to detect pipeline operating parameters and leakage conditions. These sensors usually include pressure sensors, liquid level sensors, flow meters or chemical detection sensors, and are buried in a pipe trench or a special monitoring well to capture abnormal signals in time when the pipeline is damaged or leaks.

[0004] However, due to the humid underground environment, large temperature difference, and the presence of silt, corrosive media and other influences, the sensors are easily damaged or produce signal drift, making it difficult to maintain stable accuracy and sensitivity for a long time, and frequent calibration and replacement are required, with a short service life. Moreover, the maintenance of the sensors requires excavation of the soil layer or downhole maintenance, resulting in high maintenance cost and long maintenance period,

[0005] Therefore, it is necessary to study an underground pipeline leakage pollution monitoring system. UTILITY MODEL CONTENT

[0006] In view of this, the utility model aims to provide an underground pipeline leakage pollution monitoring system, which can effectively solve the problems of poor stability and difficult maintenance of the existing buried sensor monitoring method.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] An underground pipeline leakage pollution monitoring system, comprising a sealing sleeve, a circulating pipeline, a one-way valve, a circulating pump and a monitoring unit;

[0009] The sealing sleeve is fixedly sleeved at the potential leakage point of the underground pipeline and forms a sealed interlayer with the underground pipeline;

[0010] The circulating pipeline circulates circulating liquid, and the circulating pipeline comprises an upper circulating pipe, a return pipe, a lower circulating pipe and an output pipe connected in sequence;

[0011] The lower circulation pipe is buried underground, and the sealing interlayer is communicated with the lower circulation pipe through a one-way valve.

[0012] The upper circulation pipe is arranged on the ground, and a circulating pump and a monitoring unit are arranged on the upper circulation pipe.

[0013] Further, two groups of the upper circulation pipe, the return pipe and the lower circulation pipe are arranged in parallel, and two output pipes are connected with one group of the upper circulation pipe through a three-way reversing valve.

[0014] Further, each lower circulation pipe is connected with a plurality of sealing sleeves.

[0015] Further, the sealing sleeve has a cavity, and through holes for the underground pipe to pass through are formed in left and right end faces of the cavity, and sealing pads are arranged on the through holes.

[0016] Further, the sealing sleeve comprises two half sleeves which are symmetrically arranged in an up-down direction, and the side wall of the half sleeve is provided with an ear plate, and the ear plates of the two groups of half sleeves are sealingly connected.

[0017] Further, the lower circulation pipe is arranged below the underground pipe, and the bottom of the sealing interlayer is communicated with the lower circulation pipe through a one-way valve.

[0018] Further, an electric control on-off valve is arranged at the connecting point of the sealing interlayer and the lower circulation pipe, and the electric control on-off valve is located upstream of the one-way valve.

[0019] The beneficial effects of the above technical scheme are as follows:

[0020] The sealing sleeve is used for coating potential leakage points of the underground pipe, and a sealing interlayer is formed, when leakage occurs, the leaked liquid enters the sealing interlayer, and after pressure accumulation, the leaked liquid breaks through the one-way valve and enters the circulation pipeline, and through the circulation pipeline, the leaked liquid can be transported to the ground, so that the leaked liquid underground can be brought to the ground for detection, and the monitoring unit can be arranged on the ground, thereby solving the problems of poor stability and difficult maintenance of the existing buried sensor monitoring mode, providing a stable monitoring environment for the monitoring unit, avoiding damage or signal drift, prolonging the service life and maintenance period, and reducing the cost when the monitoring unit needs to be repaired, maintained and upgraded in the later period. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a cross-sectional view of the utility model;

[0022] Figure 2 is another embodiment of the utility model;

[0023] Figure 3 is a three-dimensional view of the half sleeve.

[0024] The figure mark: 1 is a sealing sleeve, 2 is a circulating pipeline, 3 is a one-way valve, 4 is a circulating pump, 5 is a monitoring unit, 6 is a sealing interlayer, 7 is a three-way reversing valve, 8 is a sealing gasket, 9 is a half sleeve, 10 is an electric control on-off valve, 11 is an underground pipeline, 201 is an upper circulating pipe, 202 is a lower circulating pipe, 203 is an output pipe, 204 is a return pipe, 901 is an ear plate. DETAILED DESCRIPTION

[0025] The utility model will be described in further detail below in combination with the drawings and specific embodiments:

[0026] Embodiment 1 aims to provide an underground pipeline leakage pollution monitoring system, which is mainly used for targeted monitoring of potential leakage points of underground conveying pipelines, and aims at the problems of poor stability and difficult maintenance of the existing buried sensor monitoring mode.

[0027] An underground pipeline leakage pollution monitoring system, such as Figure 1 , comprises a sealing sleeve 1, a circulating pipeline 2, a one-way valve 3, a circulating pump 4 and a monitoring unit 5.

[0028] The sealing sleeve 1 comprises two half sleeves 9 arranged symmetrically up and down, such as Figure 3 The side wall of the half sleeve 9 is provided with an ear plate 901, the ear plates 901 of the two groups of half sleeves 9 are connected by bolts, and the splicing surface of the ear plate 901 is provided with a sealing piece to ensure that the two half sleeves are sealed and spliced.

[0029] As shown in Figure 1 and Figure 3 , the sealing sleeve 1 has a cavity inside, the left and right end faces of the cavity are each provided with a through hole for the underground pipeline 11 to pass through, and the through hole is provided with a sealing gasket 8. When the sealing sleeve is installed, two half sleeves are spliced from the upper and lower sides of the underground pipeline 11, so that the potential leakage point on the underground pipeline 11 is located in the cavity, and the potential leakage point is usually a pipeline interface, a position with a high probability of leakage such as a repair mark. The inner wall of the cavity of the sealing sleeve 1 forms a sealing interlayer 6 with the underground pipeline 11, and when the underground pipeline 11 leaks, the leaked liquid will enter the sealing interlayer 6. In other embodiments, the sealing sleeve 1 can also be fixedly sleeved on the underground pipeline 11 in other forms, aiming to wrap the potential leakage point on the underground pipeline 11 and form a sealing interlayer 6 capable of storing leaked liquid.

[0030] The circulation pipe 2 contains circulating fluid and includes an upper circulation pipe 201, a return pipe 204, a lower circulation pipe 202, and an output pipe 203 connected in sequence. The lower circulation pipe 202 is buried underground, and the sealing jacket 6 is connected to the lower circulation pipe 202 via a one-way valve 3. The one-way valve 3 is a spring-loaded check valve or a ball check valve to ensure that the circulating fluid in the circulation pipe 2 cannot flow back into the sealing jacket 6. When a leak occurs, the leaking fluid accumulates in the sealing jacket 6 until the pressure is sufficient to open the one-way valve 3, allowing the leaking fluid to flow unidirectionally into the circulation pipe 2.

[0031] The upper circulation pipe 201 is deployed on the ground. A circulation pump 4 and a monitoring unit 5 are installed on the upper circulation pipe 201. The circulation pump 4 is used to provide circulation power for the circulating fluid, so that the leaked fluid located underground can be brought to the ground for detection. This allows the monitoring unit 5 to be deployed on the ground, thereby solving the problems of poor stability and difficult maintenance of existing buried sensor monitoring methods. It can provide a stable monitoring environment for the monitoring unit 5, avoid damage or signal drift, extend its life and maintenance cycle. When the monitoring unit 5 needs to be inspected, maintained or upgraded in the future, it is not necessary to excavate the ground, thus reducing costs.

[0032] To save energy, the circulating pump 4 does not need to be continuously turned on; it only needs to be periodically turned on and off to allow for regular circulation and monitoring of the circulating fluid. The monitoring unit 5 includes chemical detection sensors for detecting the presence of leaking fluid. Detection principles can be selected from optical, point chemistry, and fluorescence, or simple turbidity, pH, and VOC sensors can be used for preliminary detection and early warning. It is used for online monitoring of the circulating fluid. The monitoring unit 5 is connected to the control terminal to provide real-time monitoring results and to trigger alarms promptly. The monitoring unit 5 mainly uses existing technologies, which will not be elaborated further here.

[0033] In this embodiment, the lower circulation pipe 202 is located below the underground pipeline 11, and the bottom of the sealing interlayer 6 is connected to the lower circulation pipe 202 via a one-way valve 3, making it easier for the leaking fluid in the sealing interlayer 6 to accumulate pressure and open the one-way valve 3. In other embodiments, the lower circulation pipe 202 may also be located above or to the side of the underground pipeline 11 to facilitate excavation and pipeline deployment.

[0034] In this embodiment, as Figure 1 An electrically controlled switch valve 10 is installed at the connection point between the sealing interlayer 6 and the lower circulation pipe 202, that is, on the connecting pipe between the sealing interlayer 6 and the lower circulation pipe 202. The electrically controlled switch valve 10 is located upstream of the one-way valve 3 and is connected to the control terminal signal. When the monitoring unit 5 issues an early warning, the electrically controlled switch valve 10 closes, thereby sealing the sealing interlayer 6 and preventing further leakage.

[0035] Embodiment 2, the embodiment is basically the same as embodiment 1, the difference is that the embodiment can monitor multiple potential leakage points at the same time to expand the monitoring range, and the embodiment further describes the structure.

[0036] In this embodiment, as shown in Figure 2 The upper circulating pipe 201, the return pipe 204 and the lower circulating pipe 202 are all provided with two groups in parallel, and the two output pipes 203 are connected with one group of upper circulating pipes 201 through a three-way reversing valve 7. By switching the communication state of the three-way reversing valve 7, the switching of the two groups of circulating pipes is realized, so that the two groups of adjacent circulating pipes can share one group of upper circulating pipes 201 and the circulating pump 4 and the monitoring unit 5 arranged thereon, thereby saving the cost.

[0037] In this embodiment, each lower circulating pipe 202 is connected with three sealing sleeves 1 at the same time, and a one-way valve 3 is arranged between the sealing sleeve 1 and the circulating pipe, so that each group of circulating pipes 2 can control three potential leakage points. However, it cannot be accurately monitored which of the three potential leakage points has a leak, but it can still narrow down the area of leak investigation.

[0038] In this example, the potential leakage points are not limited to being arranged on the same underground pipe 11, and adjacent or nearby underground pipes can also be implemented.

Claims

1. A subsurface pipe leak contamination monitoring system characterized by: The sealing sleeve, the circulating pipeline, the one-way valve, the circulating pump and the monitoring unit are included. The sealing sleeve is fixedly sleeved at a potential leakage point of the underground pipeline and forms a sealing interlayer with the underground pipeline. The circulating pipeline circulates circulating liquid, and the circulating pipeline includes an upper circulating pipe, a return pipe, a lower circulating pipe and an output pipe which are sequentially connected in circulation. The lower circulating pipe is buried underground, and the sealing interlayer is communicated with the lower circulating pipe through the one-way valve. The upper circulating pipe is arranged on the ground, and the upper circulating pipe is provided with the circulating pump and the monitoring unit.

2. A subsurface pipe leak contamination monitoring system according to claim 1, wherein: The upper circulating pipe, the return pipe and the lower circulating pipe are provided with two groups in parallel, and the two output pipes are connected with the same group of upper circulating pipes through a three-way reversing valve.

3. A subsurface pipe leak contamination monitoring system according to claim 2, wherein: Each lower circulating pipe is connected with a plurality of sealing sleeves.

4. A subsurface pipe leak contamination monitoring system according to any one of claims 1-3, characterized in that: The sealing sleeve has a cavity, and the left and right end faces of the cavity are provided with through holes for the underground pipeline to pass through, and the through holes are provided with sealing pads.

5. A subsurface pipe leak contamination monitoring system according to claim 4, wherein: The sealing sleeve includes two half sleeves which are symmetrically arranged in an up-down mode, the side wall of the half sleeve is provided with an ear plate, and the ear plates of the two groups of half sleeves are sealingly connected in a splicing mode.

6. A subsurface pipe leak contamination monitoring system according to claim 1, wherein: The lower circulating pipe is distributed below the underground pipeline, and the bottom of the sealing interlayer is communicated with the lower circulating pipe through the one-way valve.

7. A subsurface pipe leak contamination monitoring system according to any one of claims 1-3, wherein: An electrically-controlled on-off valve is arranged at the connecting point of the sealing interlayer and the lower circulating pipe, and the electrically-controlled on-off valve is located upstream of the one-way valve.

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